The Ambient Pressure Sensor is shorted to another circuit. If the code is active, attempt to clear the code from memory and check if the code resets. If PID 108 resets, replace the Engine Management System (EMS) Module and retest the system.
The Ambient Pressure Sensor is shorted to another circuit. If the code is active, attempt to clear the code from memory and check if the code resets. If PID 108 resets, replace the Engine Management System (EMS) Module and retest the system.
Volvo All Engines (2004 Emissions) Fault Code: PID 158 FMI 4 Battery Voltage
Volvo All Engines (2004 Emissions) Fault Code: PID 158 FMI 3 Battery Voltage
Volvo All Engines (2004 Emissions) Fault Code: PID 105 FMI 5 Boost Air Pressure / Temperature Sensor
Volvo All Engines (2004 Emissions) Fault Code: PID 105 FMI 4 Boost Air Pressure / Temperature Sensor
Volvo All Engines (2004 Emissions) Fault Code: PID 102 FMI 5 Boost Air Pressure / Temperature Sensor
Volvo All Engines (2004 Emissions) Fault Code: PID 102 FMI 3 Boost Air Pressure / Temperature Sensor
Fault Condition: The Electronic Malfunction Lamp (EML) will turn on and Parameter Identification Code (PID) code P110 will set with Failure Mode Identifier (FMI) code 4 if the EMS Module senses that the ECT Sensor signal voltage is less than .17 volts. FMI code 5 will set if the ECT Sensor signal voltage is greater than 4.92 volts. If the EMS Module senses that the ECT Sensor signal is critically above range (219°F [104°C]), FMI code 0 will be set.
Possible repairs:
Turn the ignition key OFF first.
1) Disconnect the Engine Coolant Temperature (ECT) Sensor connector. Check for continuity between either pin of the ECT Sensor and a good ground. If continuity exists, replace the ECT Sensor. 2) Disconnect the Engine Coolant Temperature (ECT) Sensor connector. Disconnect connector B from the EMS Module. Connect a jumper between EMS Module harness connector B pins 18 and 27. Check for continuity between pins Black 3874 and Brown 3876 of the ECT Sensor harness connector. If there is NO continuity, there is an open ground circuit in the harness between the common ground splice to the ECT Sensor Sensor and the EMS Module. Locate and repair the open circuit. 3) Disconnect the Engine Coolant Temperature (ECT) Sensor connector. Measure the resistance across the pins of the ECT Sensor. If the resistance of the sensor is out of range or NOT within normal operating parameters (45313 to 71 ohms), replace the sensor. 4) Disconnect the Engine Coolant Temperature (ECT) Sensor connector. Disconnect connector B from the EMS Module. Measure the voltage between EMS Module connector B pin 18 and a good ground. If there is more than 0.5 volts present, there is a short circuit to voltage in the sensor return line. Locate and repair the short circuit to voltage. 5) If dirt, looseness, or deformed contacts are found, or the pin feels loose, repair EMS Module harness connector B. 6) Disconnect the ECT Sensor connector. Disconnect EMS Module connector B. Check for continuity between pin Brown 3876 of the ECT Sensor harness connector and EMS Module harness connector B pin 27. If there is NO continuity, locate and repair the open signal circuit between the ECT Sensor harness connector and EMS Module harness connector B pin 27. 7) Disconnect the ECT Sensor connector. Disconnect EMS Module connectors A and B. Check for continuity between EMS Module harness connector B pin 27 and all other pins on EMS Module harness connectors A and B. If continuity exists, the signal line is shorted to one of the other EMS Module circuits. Locate and repair the short circuit. If there is NO continuity, the signal line is shorted to ground somewhere else in the harness. Locate and repair the short circuit to ground. 8) Disconnect the ECT Sensor connector. Connect connector B to the EMS Module. Turn the ignition key ON. Measure the voltage at pin Brown 3876 of the ECT Sensor harness connector and a good ground. If the measured voltage is between 4.5 and 5.5 volts, check the ECT Sensor harness connector for deformed pins or insufficient contact with the ECT Sensor pins. 9) Connect the ECT Sensor connector. Connect EMS Module harness connector B to the EMS Module. Turn the ignition key ON. If code P110 is still active, replace the EMS Module and retest the system. If code P110 is NOT active, the procedures have corrected the problem. Check all connectors to ensure proper connections. 10) Connect the ECT Sensor connector. Connect connector B to the EMS Module. Turn the ignition key ON. If code P110 is still active, check the EMS Module and connectors A and B for dirt, loose or shorted pins, or any other repairable damage. If no problems are evident, or are NOT repairable, replace the EMS Module and retest the system. 11) Disconnect the ECT Sensor connector. Disconnect EMS Module connector B. Check for continuity between EMS Module harness connector B pin 27 and all other pins on EMS Module connector B. If continuity exists, the signal line is shorted to one of the other EMS Module circuits. Locate and repair the short circuit to voltage, then replace the sensor. If there is NO continuity, the signal line is shorted to voltage somewhere else in the harness. Locate and repair the short circuit to voltage.
Volvo All Engines (2004 Emissions) Fault Code: PID 110 FMI 5 Engine Coolant Temperature Sensor
Volvo All Engines (2004 Emissions) Fault Code: PID 110 FMI 4 Engine Coolant Temperature Sensor
Fault Condition: The Electronic Malfunction Lamp (EML) will turn on and Parameter Identification Code (PID) code P110 will set with Failure Mode Identifier (FMI) code 4 if the EMS Module senses that the ECT Sensor signal voltage is less than .17 volts. FMI code 5 will set if the ECT Sensor signal voltage is greater than 4.92 volts. If the EMS Module senses that the ECT Sensor signal is critically above range (219°F [104°C]), FMI code 0 will be set.
Possible repairs:
Turn the ignition key OFF first.
1) Disconnect the Engine Coolant Temperature (ECT) Sensor connector. Check for continuity between either pin of the ECT Sensor and a good ground. If continuity exists, replace the ECT Sensor. 2) Disconnect the Engine Coolant Temperature (ECT) Sensor connector. Disconnect connector B from the EMS Module. Connect a jumper between EMS Module harness connector B pins 18 and 27. Check for continuity between pins Black 3874 and Brown 3876 of the ECT Sensor harness connector. If there is NO continuity, there is an open ground circuit in the harness between the common ground splice to the ECT Sensor Sensor and the EMS Module. Locate and repair the open circuit. 3) Disconnect the Engine Coolant Temperature (ECT) Sensor connector. Measure the resistance across the pins of the ECT Sensor. If the resistance of the sensor is out of range or NOT within normal operating parameters (45313 to 71 ohms), replace the sensor. 4) Disconnect the Engine Coolant Temperature (ECT) Sensor connector. Disconnect connector B from the EMS Module. Measure the voltage between EMS Module connector B pin 18 and a good ground. If there is more than 0.5 volts present, there is a short circuit to voltage in the sensor return line. Locate and repair the short circuit to voltage. 5) If dirt, looseness, or deformed contacts are found, or the pin feels loose, repair EMS Module harness connector B. 6) Disconnect the ECT Sensor connector. Disconnect EMS Module connector B. Check for continuity between pin Brown 3876 of the ECT Sensor harness connector and EMS Module harness connector B pin 27. If there is NO continuity, locate and repair the open signal circuit between the ECT Sensor harness connector and EMS Module harness connector B pin 27. 7) Disconnect the ECT Sensor connector. Disconnect EMS Module connectors A and B. Check for continuity between EMS Module harness connector B pin 27 and all other pins on EMS Module harness connectors A and B. If continuity exists, the signal line is shorted to one of the other EMS Module circuits. Locate and repair the short circuit. If there is NO continuity, the signal line is shorted to ground somewhere else in the harness. Locate and repair the short circuit to ground. 8) Disconnect the ECT Sensor connector. Connect connector B to the EMS Module. Turn the ignition key ON. Measure the voltage at pin Brown 3876 of the ECT Sensor harness connector and a good ground. If the measured voltage is between 4.5 and 5.5 volts, check the ECT Sensor harness connector for deformed pins or insufficient contact with the ECT Sensor pins. 9) Connect the ECT Sensor connector. Connect EMS Module harness connector B to the EMS Module. Turn the ignition key ON. If code P110 is still active, replace the EMS Module and retest the system. If code P110 is NOT active, the procedures have corrected the problem. Check all connectors to ensure proper connections. 10) Connect the ECT Sensor connector. Connect connector B to the EMS Module. Turn the ignition key ON. If code P110 is still active, check the EMS Module and connectors A and B for dirt, loose or shorted pins, or any other repairable damage. If no problems are evident, or are NOT repairable, replace the EMS Module and retest the system. 11) Disconnect the ECT Sensor connector. Disconnect EMS Module connector B. Check for continuity between EMS Module harness connector B pin 27 and all other pins on EMS Module connector B. If continuity exists, the signal line is shorted to one of the other EMS Module circuits. Locate and repair the short circuit to voltage, then replace the sensor. If there is NO continuity, the signal line is shorted to voltage somewhere else in the harness. Locate and repair the short circuit to voltage.
PACCAR PX-9 CM2350 (2013-17) Fault Code197 PID:111 SPN:111 FMI:18 Coolant Level – Data Valid But Below Normal Operational Range – Moderately Severe Level
Fault Condition: The Electronic Malfunction Lamp (EML) will turn on and Parameter Identification Code (PID) code P110 will set with Failure Mode Identifier (FMI) code 4 if the EMS Module senses that the ECT Sensor signal voltage is less than .17 volts. FMI code 5 will set if the ECT Sensor signal voltage is greater than 4.92 volts. If the EMS Module senses that the ECT Sensor signal is critically above range (219°F [104°C]), FMI code 0 will be set.
Possible repairs:
Turn the ignition key OFF first.
1) Disconnect the Engine Coolant Temperature (ECT) Sensor connector. Check for continuity between either pin of the ECT Sensor and a good ground. If continuity exists, replace the ECT Sensor. 2) Disconnect the Engine Coolant Temperature (ECT) Sensor connector. Disconnect connector B from the EMS Module. Connect a jumper between EMS Module harness connector B pins 18 and 27. Check for continuity between pins Black 3874 and Brown 3876 of the ECT Sensor harness connector. If there is NO continuity, there is an open ground circuit in the harness between the common ground splice to the ECT Sensor Sensor and the EMS Module. Locate and repair the open circuit. 3) Disconnect the Engine Coolant Temperature (ECT) Sensor connector. Measure the resistance across the pins of the ECT Sensor. If the resistance of the sensor is out of range or NOT within normal operating parameters (45313 to 71 ohms), replace the sensor. 4) Disconnect the Engine Coolant Temperature (ECT) Sensor connector. Disconnect connector B from the EMS Module. Measure the voltage between EMS Module connector B pin 18 and a good ground. If there is more than 0.5 volts present, there is a short circuit to voltage in the sensor return line. Locate and repair the short circuit to voltage. 5) If dirt, looseness, or deformed contacts are found, or the pin feels loose, repair EMS Module harness connector B. 6) Disconnect the ECT Sensor connector. Disconnect EMS Module connector B. Check for continuity between pin Brown 3876 of the ECT Sensor harness connector and EMS Module harness connector B pin 27. If there is NO continuity, locate and repair the open signal circuit between the ECT Sensor harness connector and EMS Module harness connector B pin 27. 7) Disconnect the ECT Sensor connector. Disconnect EMS Module connectors A and B. Check for continuity between EMS Module harness connector B pin 27 and all other pins on EMS Module harness connectors A and B. If continuity exists, the signal line is shorted to one of the other EMS Module circuits. Locate and repair the short circuit. If there is NO continuity, the signal line is shorted to ground somewhere else in the harness. Locate and repair the short circuit to ground. 8) Disconnect the ECT Sensor connector. Connect connector B to the EMS Module. Turn the ignition key ON. Measure the voltage at pin Brown 3876 of the ECT Sensor harness connector and a good ground. If the measured voltage is between 4.5 and 5.5 volts, check the ECT Sensor harness connector for deformed pins or insufficient contact with the ECT Sensor pins. 9) Connect the ECT Sensor connector. Connect EMS Module harness connector B to the EMS Module. Turn the ignition key ON. If code P110 is still active, replace the EMS Module and retest the system. If code P110 is NOT active, the procedures have corrected the problem. Check all connectors to ensure proper connections. 10) Connect the ECT Sensor connector. Connect connector B to the EMS Module. Turn the ignition key ON. If code P110 is still active, check the EMS Module and connectors A and B for dirt, loose or shorted pins, or any other repairable damage. If no problems are evident, or are NOT repairable, replace the EMS Module and retest the system. 11) Disconnect the ECT Sensor connector. Disconnect EMS Module connector B. Check for continuity between EMS Module harness connector B pin 27 and all other pins on EMS Module connector B. If continuity exists, the signal line is shorted to one of the other EMS Module circuits. Locate and repair the short circuit to voltage, then replace the sensor. If there is NO continuity, the signal line is shorted to voltage somewhere else in the harness. Locate and repair the short circuit to voltage.
Volvo All Engines (2004 Emissions) Fault Code: PID 110 FMI 4 Engine Coolant Temperature Sensor
Fault Condition: This fault will become active when the EMS Module detects that the coolant level switch has experienced a power loss or that the level can not be detected. Engine power may be derated.
Possible repairs:
Turn the ignition key OFF first.
1) Disconnect the Coolant Level Switch connector. With the coolant filled to the proper level, check for continuity across the two terminals of the Coolant Level Switch. If continuity does not exists, replace the Coolant Level Switch and retest the system. 2) Disconnect EMS Module connector B and the Coolant Level Switch connector. Measure for continuity between EMS Module connector B pin 10 and pin 2 of the Coolant Level Switch connector. If there is NO continuity, repair the open in the harness reference voltage line. 3) Disconnect EMS Module connector B and the Coolant Level Switch connector. Measure for continuity between EMS Module connector B pin 23 and pin 1 of the Coolant Level Switch connector. If there is NO continuity, repair the open in the harness reference voltage line. 4) Disconnect the Coolant Level Switch connector. Disconnect EMS Module connector B. Measure for voltage between Coolant Level Switch pin 1 and a good ground. If measured voltage is NOT approximately 0 volts, locate and repair the short to power in the harness. 5) Disconnect the Coolant Level Switch connector. Disconnect EMS Module connector B. Check for continuity between Coolant Level Switch pin 1 and a good ground. If continuity exists, locate and repair the short to ground in the harness. 6) Reconnect the connectors to the Coolant Level Switch. Reconnect EMS Module connectors A and B. Turn the ignition key ON and check for any fault codes. If PID 111 is still active, check EMS Module connector A and B for dirt, shorted or corroded pins, or any other repairable damage. If no problems are evident, or are not repairable, replace the EMS Module and retest the system.
Fault Condition: This fault will become active when the EMS Module detects that the coolant level switch has experienced a power loss or that the level can not be detected. Engine power may be derated.
Possible repairs:
Turn the ignition key OFF first.
1) Disconnect the Coolant Level Switch connector. With the coolant filled to the proper level, check for continuity across the two terminals of the Coolant Level Switch. If continuity does not exists, replace the Coolant Level Switch and retest the system. 2) Disconnect EMS Module connector B and the Coolant Level Switch connector. Measure for continuity between EMS Module connector B pin 10 and pin 2 of the Coolant Level Switch connector. If there is NO continuity, repair the open in the harness reference voltage line. 3) Disconnect EMS Module connector B and the Coolant Level Switch connector. Measure for continuity between EMS Module connector B pin 23 and pin 1 of the Coolant Level Switch connector. If there is NO continuity, repair the open in the harness reference voltage line. 4) Disconnect the Coolant Level Switch connector. Disconnect EMS Module connector B. Measure for voltage between Coolant Level Switch pin 1 and a good ground. If measured voltage is NOT approximately 0 volts, locate and repair the short to power in the harness. 5) Disconnect the Coolant Level Switch connector. Disconnect EMS Module connector B. Check for continuity between Coolant Level Switch pin 1 and a good ground. If continuity exists, locate and repair the short to ground in the harness. 6) Reconnect the connectors to the Coolant Level Switch. Reconnect EMS Module connectors A and B. Turn the ignition key ON and check for any fault codes. If PID 111 is still active, check EMS Module connector A and B for dirt, shorted or corroded pins, or any other repairable damage. If no problems are evident, or are not repairable, replace the EMS Module and retest the system.
Volvo All Engines (2004 Emissions) Fault Code: PID 404 FMI 0 Compressor Discharge Temperature
Volvo All Engines (2004 Emissions) Fault Code: PSID 201 FMI 9 CAN1 J1939 Communication Link B
Volvo All Engines (2004 Emissions) Fault Code: SID 231 FMI 2 CAN1 J1939 Communication Link A
Volvo All Engines (2004 Emissions) Fault Code: PSID 232 FMI 2 CAN 2 J1939 Communication Link A
Volvo All Engines (2004 Emissions) Fault Code: SID 18 FMI 5 Water in Fuel Valve
Volvo All Engines (2004 Emissions) Fault Code: SID 18 FMI 3 Water in Fuel Valve
Fault Condition: The Electronic Malfunction Lamp (EML) will illuminate when the Crankcase Pressure (CP) Sensor signal line voltage is less than 0.3 volts or greater than 4.75 volts. If the signal line voltage is between 0.3 volts and 4.75 volts the fault will become inactive.
Possible repairs:
Turn the ignition key OFF first.
1) Check for continuity between Crankcase Pressure (CP) Sensor harness connector pin 2 (signal line) and a good ground. If continuity exists, locate and repair the short circuit to ground. 2) Disconnect EMS Module connector B. Check for continuity between Crankcase Pressure (CP) Sensor harness connector pin 1 (reference voltage line) and EMS Module harness connector B pin 17. If there is NO continuity, repair the open in the harness reference voltage line. 3) Disconnect the Crankcase Pressure (CP) Sensor. Disconnect EMS Module connectors A and B. Check for continuity between EMS Module harness connector B pin 28 (signal line) and all other pins in EMS Module harness connectors A and B. Visually check EMS Module connector B pin 28 for a short circuit. If continuity exists or if there is a visual short, repair the short circuit to the signal line. If there is NO continuity or visual short, replace the EMS Module. 4) Disconnect the Crankcase Pressure (CP) Sensor. Disconnect Engine Management System (EMS) Module connector B. Check for continuity between Crankcase Pressure (CP) Sensor harness connector pin 2 (signal line) and EMS Module harness connector B pin 28. If there is NO continuity, repair the open in the harness signal line. 5) Disconnect the Crankcase Pressure (CP) Sensor. Disconnect Engine Management System (EMS) Module connectors A and B. Check for continuity between EMS Module harness connector B pin 17 (reference voltage line) and all other pins in EMS Module harness connectors A and B. Visually check EMS Module connector B pin 17 for a short circuit. If continuity exists or if there is a visual short, repair the short circuit to the reference voltage line. If there is NO continuity or visual short, replace the EMS Module. 6) Disconnect Engine Management System (EMS) Module connectors A and B. Disconnect the Crankcase Pressure (CP) Sensor. Check for continuity between EMS Module harness connector B pin 17 (reference voltage line) and all other pins in EMS Module harness connectors A and B. Visually check EMS Module connector B pin 17 for a short circuit. If continuity exists or if there is a visual short, repair the short circuit to the reference voltage line. If there is NO continuity or visual short circuit, replace the EMS Module. 7) Visually inspect both sides of the Crankcase Pressure (CP) Sensor connector for a repairable open. If there is a repairable fault or any of the pins feel loose, repair or replace the connector. 8) Disconnect Engine Management System (EMS) Module connectors A and B. Disconnect the Crankcase Pressure (CP) Sensor. Check for continuity between EMS Module harness connector B pin 18 (ground line) and all other pins in EMS Module harness connectors A and B. Visually check EMS Module connector B pin 18 for a short circuit. If continuity exists or if there is a visual short circuit, repair the short to the return line. If there is NO continuity or visual short circuit, replace the EMS Module. 9) Visually inspect both sides of the Crankcase Pressure (CP) Sensor connector for a repairable open. If there is a repairable fault or any of the pins feel loose, repair or replace the connector. 10) Disconnect the Crankcase Pressure (CP) Sensor. Disconnect Engine Management System (EMS) Module connector B. Check for continuity between Crankcase Pressure (CP) Sensor harness connector pin 4 (ground line) and EMS Module harness connector B pin 18. If there is NO continuity, repair the open in the harness ground line. 11) Remove the Crankcase Pressure (CP) Sensor. Connect the Crankcase Pressure (CP) Sensor to a regulated air supply with an accurate atmospheric pressure gauge. Connect a jumper wire between Crankcase Pressure (CP) Sensor pin 1 and pin 1 on the sensor harness connector. Connect a jumper wire between Crankcase Pressure (CP) Sensor pin 4 and a good ground. Turn the ignition key ON. If the Crankcase Pressure (CP) Sensor output is correct throughout the entire pressure range, reinstall the sensor and replace the EMS Module. If the Crankcase Pressure (CP) Sensor output is NOT correct throughout the entire pressure range, replace the Crankcase Pressure (CP) Sensor and recheck the system. 12) Visually inspect both sides of EMS Module connector B pin 18 for a repairable open in the ground line. If a repairable open is found, repair or replace EMS Module harness connector B. If the pins are making good contact, replace the EMS Module.
Fault Condition: The Electronic Malfunction Lamp (EML) will illuminate when the Crankcase Pressure (CP) Sensor signal line voltage is less than 0.3 volts or greater than 4.75 volts. If the signal line voltage is between 0.3 volts and 4.75 volts the fault will become inactive.
Possible repairs:
Turn the ignition key OFF first.
1) Check for continuity between Crankcase Pressure (CP) Sensor harness connector pin 2 (signal line) and a good ground. If continuity exists, locate and repair the short circuit to ground. 2) Disconnect EMS Module connector B. Check for continuity between Crankcase Pressure (CP) Sensor harness connector pin 1 (reference voltage line) and EMS Module harness connector B pin 17. If there is NO continuity, repair the open in the harness reference voltage line. 3) Disconnect the Crankcase Pressure (CP) Sensor. Disconnect EMS Module connectors A and B. Check for continuity between EMS Module harness connector B pin 28 (signal line) and all other pins in EMS Module harness connectors A and B. Visually check EMS Module connector B pin 28 for a short circuit. If continuity exists or if there is a visual short, repair the short circuit to the signal line. If there is NO continuity or visual short, replace the EMS Module. 4) Disconnect the Crankcase Pressure (CP) Sensor. Disconnect Engine Management System (EMS) Module connector B. Check for continuity between Crankcase Pressure (CP) Sensor harness connector pin 2 (signal line) and EMS Module harness connector B pin 28. If there is NO continuity, repair the open in the harness signal line. 5) Disconnect the Crankcase Pressure (CP) Sensor. Disconnect Engine Management System (EMS) Module connectors A and B. Check for continuity between EMS Module harness connector B pin 17 (reference voltage line) and all other pins in EMS Module harness connectors A and B. Visually check EMS Module connector B pin 17 for a short circuit. If continuity exists or if there is a visual short, repair the short circuit to the reference voltage line. If there is NO continuity or visual short, replace the EMS Module. 6) Disconnect Engine Management System (EMS) Module connectors A and B. Disconnect the Crankcase Pressure (CP) Sensor. Check for continuity between EMS Module harness connector B pin 17 (reference voltage line) and all other pins in EMS Module harness connectors A and B. Visually check EMS Module connector B pin 17 for a short circuit. If continuity exists or if there is a visual short, repair the short circuit to the reference voltage line. If there is NO continuity or visual short circuit, replace the EMS Module. 7) Visually inspect both sides of the Crankcase Pressure (CP) Sensor connector for a repairable open. If there is a repairable fault or any of the pins feel loose, repair or replace the connector. 8) Disconnect Engine Management System (EMS) Module connectors A and B. Disconnect the Crankcase Pressure (CP) Sensor. Check for continuity between EMS Module harness connector B pin 18 (ground line) and all other pins in EMS Module harness connectors A and B. Visually check EMS Module connector B pin 18 for a short circuit. If continuity exists or if there is a visual short circuit, repair the short to the return line. If there is NO continuity or visual short circuit, replace the EMS Module. 9) Visually inspect both sides of the Crankcase Pressure (CP) Sensor connector for a repairable open. If there is a repairable fault or any of the pins feel loose, repair or replace the connector. 10) Disconnect the Crankcase Pressure (CP) Sensor. Disconnect Engine Management System (EMS) Module connector B. Check for continuity between Crankcase Pressure (CP) Sensor harness connector pin 4 (ground line) and EMS Module harness connector B pin 18. If there is NO continuity, repair the open in the harness ground line. 11) Remove the Crankcase Pressure (CP) Sensor. Connect the Crankcase Pressure (CP) Sensor to a regulated air supply with an accurate atmospheric pressure gauge. Connect a jumper wire between Crankcase Pressure (CP) Sensor pin 1 and pin 1 on the sensor harness connector. Connect a jumper wire between Crankcase Pressure (CP) Sensor pin 4 and a good ground. Turn the ignition key ON. If the Crankcase Pressure (CP) Sensor output is correct throughout the entire pressure range, reinstall the sensor and replace the EMS Module. If the Crankcase Pressure (CP) Sensor output is NOT correct throughout the entire pressure range, replace the Crankcase Pressure (CP) Sensor and recheck the system. 12) Visually inspect both sides of EMS Module connector B pin 18 for a repairable open in the ground line. If a repairable open is found, repair or replace EMS Module harness connector B. If the pins are making good contact, replace the EMS Module.
Fault Condition: The Electronic Malfunction Lamp (EML) will illuminate when the Crankcase Pressure (CP) Sensor signal line voltage is less than 0.3 volts or greater than 4.75 volts. If the signal line voltage is between 0.3 volts and 4.75 volts the fault will become inactive.
Possible repairs:
Turn the ignition key OFF first.
1) Check for continuity between Crankcase Pressure (CP) Sensor harness connector pin 2 (signal line) and a good ground. If continuity exists, locate and repair the short circuit to ground. 2) Disconnect EMS Module connector B. Check for continuity between Crankcase Pressure (CP) Sensor harness connector pin 1 (reference voltage line) and EMS Module harness connector B pin 17. If there is NO continuity, repair the open in the harness reference voltage line. 3) Disconnect the Crankcase Pressure (CP) Sensor. Disconnect EMS Module connectors A and B. Check for continuity between EMS Module harness connector B pin 28 (signal line) and all other pins in EMS Module harness connectors A and B. Visually check EMS Module connector B pin 28 for a short circuit. If continuity exists or if there is a visual short, repair the short circuit to the signal line. If there is NO continuity or visual short, replace the EMS Module. 4) Disconnect the Crankcase Pressure (CP) Sensor. Disconnect Engine Management System (EMS) Module connector B. Check for continuity between Crankcase Pressure (CP) Sensor harness connector pin 2 (signal line) and EMS Module harness connector B pin 28. If there is NO continuity, repair the open in the harness signal line. 5) Disconnect the Crankcase Pressure (CP) Sensor. Disconnect Engine Management System (EMS) Module connectors A and B. Check for continuity between EMS Module harness connector B pin 17 (reference voltage line) and all other pins in EMS Module harness connectors A and B. Visually check EMS Module connector B pin 17 for a short circuit. If continuity exists or if there is a visual short, repair the short circuit to the reference voltage line. If there is NO continuity or visual short, replace the EMS Module. 6) Disconnect Engine Management System (EMS) Module connectors A and B. Disconnect the Crankcase Pressure (CP) Sensor. Check for continuity between EMS Module harness connector B pin 17 (reference voltage line) and all other pins in EMS Module harness connectors A and B. Visually check EMS Module connector B pin 17 for a short circuit. If continuity exists or if there is a visual short, repair the short circuit to the reference voltage line. If there is NO continuity or visual short circuit, replace the EMS Module. 7) Visually inspect both sides of the Crankcase Pressure (CP) Sensor connector for a repairable open. If there is a repairable fault or any of the pins feel loose, repair or replace the connector. 8) Disconnect Engine Management System (EMS) Module connectors A and B. Disconnect the Crankcase Pressure (CP) Sensor. Check for continuity between EMS Module harness connector B pin 18 (ground line) and all other pins in EMS Module harness connectors A and B. Visually check EMS Module connector B pin 18 for a short circuit. If continuity exists or if there is a visual short circuit, repair the short to the return line. If there is NO continuity or visual short circuit, replace the EMS Module. 9) Visually inspect both sides of the Crankcase Pressure (CP) Sensor connector for a repairable open. If there is a repairable fault or any of the pins feel loose, repair or replace the connector. 10) Disconnect the Crankcase Pressure (CP) Sensor. Disconnect Engine Management System (EMS) Module connector B. Check for continuity between Crankcase Pressure (CP) Sensor harness connector pin 4 (ground line) and EMS Module harness connector B pin 18. If there is NO continuity, repair the open in the harness ground line. 11) Remove the Crankcase Pressure (CP) Sensor. Connect the Crankcase Pressure (CP) Sensor to a regulated air supply with an accurate atmospheric pressure gauge. Connect a jumper wire between Crankcase Pressure (CP) Sensor pin 1 and pin 1 on the sensor harness connector. Connect a jumper wire between Crankcase Pressure (CP) Sensor pin 4 and a good ground. Turn the ignition key ON. If the Crankcase Pressure (CP) Sensor output is correct throughout the entire pressure range, reinstall the sensor and replace the EMS Module. If the Crankcase Pressure (CP) Sensor output is NOT correct throughout the entire pressure range, replace the Crankcase Pressure (CP) Sensor and recheck the system. 12) Visually inspect both sides of EMS Module connector B pin 18 for a repairable open in the ground line. If a repairable open is found, repair or replace EMS Module harness connector B. If the pins are making good contact, replace the EMS Module.
