Volvo

Fault Condition: The Electronic Malfunction Lamp (EML) will turn on and PID 102 will set when the EMS Module senses that the Boost Pressure and Temperature Sensor signal voltage is less than 0.15 volts or greater than 4.75 volts. If the Boost Air Pressure/Temperature Sensor voltage is between 0.15 volts and 4.75 volts, the fault will become inactive.

Possible repairs:

Turn the ignition key OFF first.

1) Disconnect the Boost Air Pressure/Temperature Sensor. Disconnect Engine Management System (EMS) Module connector A. Check for continuity between pin 4 on the harness side of the Boost Air Pressure/Temperature Sensor and a good ground. If continuity exists, locate and repair the short to ground and retest the system.
2) Disconnect the Boost Air Pressure/Temperature Sensor. Disconnect Engine Management System (EMS) Module connector A. Check for continuity between EMS Module connector A pin 7 and Boost Air Pressure/Temperature Sensor harness connector pin 3. If there is NO continuity, locate and repair the open between Boost Air Pressure/Temperature Sensor connector pin 3 and EMS Module connector A pin 7.
3) Disconnect the Boost Air Pressure/Temperature Sensor. Disconnect Engine Management System (EMS) Module connector A. Measure the voltage between EMS Module connector A pin 22 and a good ground.
If there is NO voltage present, and FMI 3 is still set, replace the EMS Module and retest the system. If voltage is measured, the signal line is shorted to voltage, locate and repair the short to voltage and retest the system.
4) Disconnect the Boost Air Pressure/Temperature Sensor. Disconnect Engine Management System (EMS) Module connector A. Check for continuity between EMS Module connector A pin 22 and Boost Air Pressure/Temperature Sensor harness connector pin 4. If continuity exists, replace the Boost Air Pressure/Temperature Sensor and retest the system. If PID 102 is still set, replace the EMS Module. If there is NO continuity, locate and repair the open in the Boost Air Pressure/Temperature Sensor signal line.
5) Disconnect the Boost Air Pressure/Temperature Sensor. Disconnect Engine Management System (EMS) Module connector A. Check for continuity between EMS Module connector A pin 7 and a good ground. If continuity exists, locate and repair the short circuit to ground in the voltage reference line. If there is NO continuity, check the EMS terminal contact at A7. If it is OK, reconnect the Boost Air Pressure/Temperature Sensor and the EMS Module connector and retest the system. If PID 102 is still active, replace the EMS Module.
6) Disconnect the Boost Air Pressure/Temperature Sensor. Disconnect Engine Management System (EMS) Module connector A. Measure the voltage between EMS Module connector A pin 7 and a good ground.
If there is NO voltage present, reconnect the Boost Air Pressure/Temperature Sensor connector and the Engine Management System (EMS) Module connectors and retest the system. If code PID 102 is still set, replace the EMS Module. If voltage is measured, the Boost Air Pressure/Temperature voltage reference line is shorted to voltage. Locate and repair the short circuit to voltage.
7) Disconnect the Boost Air Pressure/Temperature Sensor. Disconnect Engine Management System (EMS) Module connector A. On the harness side of the Boost Air Pressure/Temperature Sensor connector, check for continuity between EMS Module connector A pin 11 and Boost Air Pressure/Temperature Sensor connector pin 1. If there is NO continuity, there is an open in the sensor return line. Locate and repair the open circuit.
8) Replace the Boost Air Pressure/Temperature Sensor. Turn the ignition key ON. If PID 102 is still active, reinstall the original Boost Air Pressure/Temperature Sensor and replace the Engine Management System (EMS) Module. If PID 102 is NOT present, replacing the Boost Air Pressure/Temperature Sensor has solved the problem. Check all connectors to ensure proper connections.

Fault Condition: The Electronic Malfunction Lamp (EML) will turn on and PID 102 will set when the EMS Module senses that the Boost Pressure and Temperature Sensor signal voltage is less than 0.15 volts or greater than 4.75 volts. If the Boost Air Pressure/Temperature Sensor voltage is between 0.15 volts and 4.75 volts, the fault will become inactive.

Possible repairs:

Turn the ignition key OFF first.

1) Disconnect the Boost Air Pressure/Temperature Sensor. Disconnect Engine Management System (EMS) Module connector A. Check for continuity between pin 4 on the harness side of the Boost Air Pressure/Temperature Sensor and a good ground. If continuity exists, locate and repair the short to ground and retest the system.
2) Disconnect the Boost Air Pressure/Temperature Sensor. Disconnect Engine Management System (EMS) Module connector A. Check for continuity between EMS Module connector A pin 7 and Boost Air Pressure/Temperature Sensor harness connector pin 3. If there is NO continuity, locate and repair the open between Boost Air Pressure/Temperature Sensor connector pin 3 and EMS Module connector A pin 7.
3) Disconnect the Boost Air Pressure/Temperature Sensor. Disconnect Engine Management System (EMS) Module connector A. Measure the voltage between EMS Module connector A pin 22 and a good ground.
If there is NO voltage present, and FMI 3 is still set, replace the EMS Module and retest the system. If voltage is measured, the signal line is shorted to voltage, locate and repair the short to voltage and retest the system.
4) Disconnect the Boost Air Pressure/Temperature Sensor. Disconnect Engine Management System (EMS) Module connector A. Check for continuity between EMS Module connector A pin 22 and Boost Air Pressure/Temperature Sensor harness connector pin 4. If continuity exists, replace the Boost Air Pressure/Temperature Sensor and retest the system. If PID 102 is still set, replace the EMS Module. If there is NO continuity, locate and repair the open in the Boost Air Pressure/Temperature Sensor signal line.
5) Disconnect the Boost Air Pressure/Temperature Sensor. Disconnect Engine Management System (EMS) Module connector A. Check for continuity between EMS Module connector A pin 7 and a good ground. If continuity exists, locate and repair the short circuit to ground in the voltage reference line. If there is NO continuity, check the EMS terminal contact at A7. If it is OK, reconnect the Boost Air Pressure/Temperature Sensor and the EMS Module connector and retest the system. If PID 102 is still active, replace the EMS Module.
6) Disconnect the Boost Air Pressure/Temperature Sensor. Disconnect Engine Management System (EMS) Module connector A. Measure the voltage between EMS Module connector A pin 7 and a good ground.
If there is NO voltage present, reconnect the Boost Air Pressure/Temperature Sensor connector and the Engine Management System (EMS) Module connectors and retest the system. If code PID 102 is still set, replace the EMS Module. If voltage is measured, the Boost Air Pressure/Temperature voltage reference line is shorted to voltage. Locate and repair the short circuit to voltage.
7) Disconnect the Boost Air Pressure/Temperature Sensor. Disconnect Engine Management System (EMS) Module connector A. On the harness side of the Boost Air Pressure/Temperature Sensor connector, check for continuity between EMS Module connector A pin 11 and Boost Air Pressure/Temperature Sensor connector pin 1. If there is NO continuity, there is an open in the sensor return line. Locate and repair the open circuit.
8) Replace the Boost Air Pressure/Temperature Sensor. Turn the ignition key ON. If PID 102 is still active, reinstall the original Boost Air Pressure/Temperature Sensor and replace the Engine Management System (EMS) Module. If PID 102 is NOT present, replacing the Boost Air Pressure/Temperature Sensor has solved the problem. Check all connectors to ensure proper connections.

Fault Condition: The Electronic Malfunction Lamp (EML) will turn on and PID 102 will set when the EMS Module senses that the Boost Pressure and Temperature Sensor signal voltage is less than 0.15 volts or greater than 4.75 volts. If the Boost Air Pressure/Temperature Sensor voltage is between 0.15 volts and 4.75 volts, the fault will become inactive.

Possible repairs:

Turn the ignition key OFF first.

1) Disconnect the Boost Air Pressure/Temperature Sensor. Disconnect Engine Management System (EMS) Module connector A. Check for continuity between pin 4 on the harness side of the Boost Air Pressure/Temperature Sensor and a good ground. If continuity exists, locate and repair the short to ground and retest the system.
2) Disconnect the Boost Air Pressure/Temperature Sensor. Disconnect Engine Management System (EMS) Module connector A. Check for continuity between EMS Module connector A pin 7 and Boost Air Pressure/Temperature Sensor harness connector pin 3. If there is NO continuity, locate and repair the open between Boost Air Pressure/Temperature Sensor connector pin 3 and EMS Module connector A pin 7.
3) Disconnect the Boost Air Pressure/Temperature Sensor. Disconnect Engine Management System (EMS) Module connector A. Measure the voltage between EMS Module connector A pin 22 and a good ground.
If there is NO voltage present, and FMI 3 is still set, replace the EMS Module and retest the system. If voltage is measured, the signal line is shorted to voltage, locate and repair the short to voltage and retest the system.
4) Disconnect the Boost Air Pressure/Temperature Sensor. Disconnect Engine Management System (EMS) Module connector A. Check for continuity between EMS Module connector A pin 22 and Boost Air Pressure/Temperature Sensor harness connector pin 4. If continuity exists, replace the Boost Air Pressure/Temperature Sensor and retest the system. If PID 102 is still set, replace the EMS Module. If there is NO continuity, locate and repair the open in the Boost Air Pressure/Temperature Sensor signal line.
5) Disconnect the Boost Air Pressure/Temperature Sensor. Disconnect Engine Management System (EMS) Module connector A. Check for continuity between EMS Module connector A pin 7 and a good ground. If continuity exists, locate and repair the short circuit to ground in the voltage reference line. If there is NO continuity, check the EMS terminal contact at A7. If it is OK, reconnect the Boost Air Pressure/Temperature Sensor and the EMS Module connector and retest the system. If PID 102 is still active, replace the EMS Module.
6) Disconnect the Boost Air Pressure/Temperature Sensor. Disconnect Engine Management System (EMS) Module connector A. Measure the voltage between EMS Module connector A pin 7 and a good ground.
If there is NO voltage present, reconnect the Boost Air Pressure/Temperature Sensor connector and the Engine Management System (EMS) Module connectors and retest the system. If code PID 102 is still set, replace the EMS Module. If voltage is measured, the Boost Air Pressure/Temperature voltage reference line is shorted to voltage. Locate and repair the short circuit to voltage.
7) Disconnect the Boost Air Pressure/Temperature Sensor. Disconnect Engine Management System (EMS) Module connector A. On the harness side of the Boost Air Pressure/Temperature Sensor connector, check for continuity between EMS Module connector A pin 11 and Boost Air Pressure/Temperature Sensor connector pin 1. If there is NO continuity, there is an open in the sensor return line. Locate and repair the open circuit.
8) Replace the Boost Air Pressure/Temperature Sensor. Turn the ignition key ON. If PID 102 is still active, reinstall the original Boost Air Pressure/Temperature Sensor and replace the Engine Management System (EMS) Module. If PID 102 is NOT present, replacing the Boost Air Pressure/Temperature Sensor has solved the problem. Check all connectors to ensure proper connections.

Fault Condition: If the EMS Module detects an open, short to ground or short to voltage in the Turbo Speed Sensor signal circuit, the Electronic Malfunction Lamp (EML) will turn ON and PID 103 will set. PID 103 will also set if the turbocharger wheel speed is not within the predetermined limits at a given engine speed. A fault is logged if the measured turbocharger speed is 25% or more lower than the target wheel speed for the measured boost. The speed must be low for approximately 5 seconds. The engine must be running for the diagnostic to take place (turbo speed is not measured when the engine is stopped – service tools will generally freeze on the last known value).

Possible repairs:

Turn the ignition key OFF first.

1) Disconnect the Turbo Speed Sensor connector. Measure the resistance across terminals 1 and 2 of the Turbo Speed Sensor. If the resistance is NOT between 600–1000 ohms at 77°F (25°C), inspect the Turbo Speed Sensor connector for damage. If no damage is evident, replace the Turbo Speed Sensor.
2) Disconnect the Turbo Speed Sensor connector. Check for continuity between pins 1 and 2 of the Turbo Speed Sensor and a good ground. If continuity exists, replace the Turbo Speed Sensor.
3) Disconnect the Turbo Speed Sensor connector. Disconnect EMS Module connector A. Install a jumper between pins 1 and 2 of the Turbo Speed Sensor harness connector. Check for continuity between EMS Module connector A pins 41 and 42. If there is NO continuity, there is an open in one of the circuits between the Turbo Speed Sensor and the EMS Module connector A. Locate and repair the open circuit.
4) Remove the jumper from the Turbo Speed Sensor harness connector. Disconnect EMS Module connector A. Check for continuity between EMS Module connector A pin 41 and a good ground. Check for continuity between EMS Module connector A pin 42 and a good ground. If continuity exists between either pin and ground, there is short to ground in one of the circuits between the Turbo Speed Sensor and the EMS Module connector A. Locate
and repair the short to ground.
5) Disconnect the Turbo Speed Sensor connector. Disconnect EMS Module connector A. Turn the ignition key ON. Measure the voltage between EMS Module connector A pins 41 and 42 and a good ground. If the measured voltage is greater than 0.5 volts, there is short to voltage in one of the circuits between the Turbo Speed Sensor and the EMS Module connector A. Locate and repair the short to voltage.
6) Disconnect EMS Module connectors A and B. Disconnect the Turbo Speed Sensor connector. Check for continuity between EMS Module connector A pins 41 and 42 and all other pins on EMS Module connectors A and B.
If continuity exists, there is short to one of the other EMS Module circuits. Locate and repair the short circuit.
7) Connect the Turbo Speed Sensor harness connector. Connect connectors A and B to the EMS Module. Turn the ignition key ON. If PID 103 is active, replace the Turbo Speed Sensor and retest the system. If PID 103 is still active, replace the EMS Module and retest the system. If PID 103 is not active, the diagnostic procedures have corrected the problem. Check all connectors to ensure proper connections.

Fault Condition: If the EMS Module detects an open, short to ground or short to voltage in the Turbo Speed Sensor signal circuit, the Electronic Malfunction Lamp (EML) will turn ON and PID 103 will set. PID 103 will also set if the turbocharger wheel speed is not within the predetermined limits at a given engine speed. A fault is logged if the measured turbocharger speed is 25% or more lower than the target wheel speed for the measured boost. The speed must be low for approximately 5 seconds. The engine must be running for the diagnostic to take place (turbo speed is not measured when the engine is stopped – service tools will generally freeze on the last known value).

Possible repairs:

Turn the ignition key OFF first.

1) Disconnect the Turbo Speed Sensor connector. Measure the resistance across terminals 1 and 2 of the Turbo Speed Sensor. If the resistance is NOT between 600–1000 ohms at 77°F (25°C), inspect the Turbo Speed Sensor connector for damage. If no damage is evident, replace the Turbo Speed Sensor.
2) Disconnect the Turbo Speed Sensor connector. Check for continuity between pins 1 and 2 of the Turbo Speed Sensor and a good ground. If continuity exists, replace the Turbo Speed Sensor.
3) Disconnect the Turbo Speed Sensor connector. Disconnect EMS Module connector A. Install a jumper between pins 1 and 2 of the Turbo Speed Sensor harness connector. Check for continuity between EMS Module connector A pins 41 and 42. If there is NO continuity, there is an open in one of the circuits between the Turbo Speed Sensor and the EMS Module connector A. Locate and repair the open circuit.
4) Remove the jumper from the Turbo Speed Sensor harness connector. Disconnect EMS Module connector A. Check for continuity between EMS Module connector A pin 41 and a good ground. Check for continuity between EMS Module connector A pin 42 and a good ground. If continuity exists between either pin and ground, there is short to ground in one of the circuits between the Turbo Speed Sensor and the EMS Module connector A. Locate
and repair the short to ground.
5) Disconnect the Turbo Speed Sensor connector. Disconnect EMS Module connector A. Turn the ignition key ON. Measure the voltage between EMS Module connector A pins 41 and 42 and a good ground. If the measured voltage is greater than 0.5 volts, there is short to voltage in one of the circuits between the Turbo Speed Sensor and the EMS Module connector A. Locate and repair the short to voltage.
6) Disconnect EMS Module connectors A and B. Disconnect the Turbo Speed Sensor connector. Check for continuity between EMS Module connector A pins 41 and 42 and all other pins on EMS Module connectors A and B.
If continuity exists, there is short to one of the other EMS Module circuits. Locate and repair the short circuit.
7) Connect the Turbo Speed Sensor harness connector. Connect connectors A and B to the EMS Module. Turn the ignition key ON. If PID 103 is active, replace the Turbo Speed Sensor and retest the system. If PID 103 is still active, replace the EMS Module and retest the system. If PID 103 is not active, the diagnostic procedures have corrected the problem. Check all connectors to ensure proper connections.

Fault Condition: If the EMS Module detects an open, short to ground or short to voltage in the Turbo Speed Sensor signal circuit, the Electronic Malfunction Lamp (EML) will turn ON and PID 103 will set. PID 103 will also set if the turbocharger wheel speed is not within the predetermined limits at a given engine speed. A fault is logged if the measured turbocharger speed is 25% or more lower than the target wheel speed for the measured boost. The speed must be low for approximately 5 seconds. The engine must be running for the diagnostic to take place (turbo speed is not measured when the engine is stopped – service tools will generally freeze on the last known value).

Possible repairs:

Turn the ignition key OFF first.

1) Disconnect the Turbo Speed Sensor connector. Measure the resistance across terminals 1 and 2 of the Turbo Speed Sensor. If the resistance is NOT between 600–1000 ohms at 77°F (25°C), inspect the Turbo Speed Sensor connector for damage. If no damage is evident, replace the Turbo Speed Sensor.
2) Disconnect the Turbo Speed Sensor connector. Check for continuity between pins 1 and 2 of the Turbo Speed Sensor and a good ground. If continuity exists, replace the Turbo Speed Sensor.
3) Disconnect the Turbo Speed Sensor connector. Disconnect EMS Module connector A. Install a jumper between pins 1 and 2 of the Turbo Speed Sensor harness connector. Check for continuity between EMS Module connector A pins 41 and 42. If there is NO continuity, there is an open in one of the circuits between the Turbo Speed Sensor and the EMS Module connector A. Locate and repair the open circuit.
4) Remove the jumper from the Turbo Speed Sensor harness connector. Disconnect EMS Module connector A. Check for continuity between EMS Module connector A pin 41 and a good ground. Check for continuity between EMS Module connector A pin 42 and a good ground. If continuity exists between either pin and ground, there is short to ground in one of the circuits between the Turbo Speed Sensor and the EMS Module connector A. Locate
and repair the short to ground.
5) Disconnect the Turbo Speed Sensor connector. Disconnect EMS Module connector A. Turn the ignition key ON. Measure the voltage between EMS Module connector A pins 41 and 42 and a good ground. If the measured voltage is greater than 0.5 volts, there is short to voltage in one of the circuits between the Turbo Speed Sensor and the EMS Module connector A. Locate and repair the short to voltage.
6) Disconnect EMS Module connectors A and B. Disconnect the Turbo Speed Sensor connector. Check for continuity between EMS Module connector A pins 41 and 42 and all other pins on EMS Module connectors A and B.
If continuity exists, there is short to one of the other EMS Module circuits. Locate and repair the short circuit.
7) Connect the Turbo Speed Sensor harness connector. Connect connectors A and B to the EMS Module. Turn the ignition key ON. If PID 103 is active, replace the Turbo Speed Sensor and retest the system. If PID 103 is still active, replace the EMS Module and retest the system. If PID 103 is not active, the diagnostic procedures have corrected the problem. Check all connectors to ensure proper connections.

Fault Condition: If the EMS Module detects an open, short to ground or short to voltage in the Turbo Speed Sensor signal circuit, the Electronic Malfunction Lamp (EML) will turn ON and PID 103 will set. PID 103 will also set if the turbocharger wheel speed is not within the predetermined limits at a given engine speed. A fault is logged if the measured turbocharger speed is 25% or more lower than the target wheel speed for the measured boost. The speed must be low for approximately 5 seconds. The engine must be running for the diagnostic to take place (turbo speed is not measured when the engine is stopped – service tools will generally freeze on the last known value).

Possible repairs:

Turn the ignition key OFF first.

1) Disconnect the Turbo Speed Sensor connector. Measure the resistance across terminals 1 and 2 of the Turbo Speed Sensor. If the resistance is NOT between 600–1000 ohms at 77°F (25°C), inspect the Turbo Speed Sensor connector for damage. If no damage is evident, replace the Turbo Speed Sensor.
2) Disconnect the Turbo Speed Sensor connector. Check for continuity between pins 1 and 2 of the Turbo Speed Sensor and a good ground. If continuity exists, replace the Turbo Speed Sensor.
3) Disconnect the Turbo Speed Sensor connector. Disconnect EMS Module connector A. Install a jumper between pins 1 and 2 of the Turbo Speed Sensor harness connector. Check for continuity between EMS Module connector A pins 41 and 42. If there is NO continuity, there is an open in one of the circuits between the Turbo Speed Sensor and the EMS Module connector A. Locate and repair the open circuit.
4) Remove the jumper from the Turbo Speed Sensor harness connector. Disconnect EMS Module connector A. Check for continuity between EMS Module connector A pin 41 and a good ground. Check for continuity between EMS Module connector A pin 42 and a good ground. If continuity exists between either pin and ground, there is short to ground in one of the circuits between the Turbo Speed Sensor and the EMS Module connector A. Locate
and repair the short to ground.
5) Disconnect the Turbo Speed Sensor connector. Disconnect EMS Module connector A. Turn the ignition key ON. Measure the voltage between EMS Module connector A pins 41 and 42 and a good ground. If the measured voltage is greater than 0.5 volts, there is short to voltage in one of the circuits between the Turbo Speed Sensor and the EMS Module connector A. Locate and repair the short to voltage.
6) Disconnect EMS Module connectors A and B. Disconnect the Turbo Speed Sensor connector. Check for continuity between EMS Module connector A pins 41 and 42 and all other pins on EMS Module connectors A and B.
If continuity exists, there is short to one of the other EMS Module circuits. Locate and repair the short circuit.
7) Connect the Turbo Speed Sensor harness connector. Connect connectors A and B to the EMS Module. Turn the ignition key ON. If PID 103 is active, replace the Turbo Speed Sensor and retest the system. If PID 103 is still active, replace the EMS Module and retest the system. If PID 103 is not active, the diagnostic procedures have corrected the problem. Check all connectors to ensure proper connections.

Fault Condition: The Electronic Malfunction Lamp (EML) will turn on and PID 105 will set when the EMS Module senses that the Boost Pressure and Temperature Sensor signal voltage is less than 0.1 volts or greater than 4.55 volts. If the Boost Air Pressure/Temperature Sensor voltage is between 0.1 volts and 4.55 volts, the fault will become inactive.

Possible repairs:

Turn the ignition key OFF first.

1) Disconnect the Boost Air Pressure/Temperature Sensor connector. Measure the resistance between pins 1 and 2 of the Boost Air Pressure/Temperature Sensor with the ambient air temperature between 32° and 203°F (0° and 95°C). If the measured resistance is NOT between 5887 and 213.67 ohms, replace the sensor.
2) Disconnect the Boost Air Pressure/Temperature Sensor connector. Check for continuity between pin 1 of the Boost Air Pressure/Temperature Sensor and a good ground. Check for continuity between pin 2 of the Boost Air Pressure/Temperature Sensor and a good ground. Check for continuity between pin 3 of the Boost Air Pressure/Temperature Sensor and a good ground. Check for continuity between pin 4 of the Boost Air Pressure/Temperature Sensor and a good ground. If continuity exists on any pin, replace the Boost Air Pressure/Temperature Sensor.
3) Disconnect the Boost Air Pressure/Temperature Sensor harness connector. Measure the resistance between pins 1 and 2 of the Boost Air Pressure/Temperature Sensor with the ambient air temperature between 32° and 203°F (0° and 95°C). If the measured resistance is NOT between 5887 and 213.67 ohms, replace the Boost Air Pressure/Temperature Sensor.
4) disconnect the Boost Air Pressure/Temperature Sensor harness connector. Disconnect Engine Management System (EMS) Module connector A. Check for continuity between pin 2 of the Boost Air Pressure/Temperature Sensor harness connector and Engine Management System (EMS) Module harness connector A pin 47. If there is NO continuity, locate and repair the open in the signal circuit between the Boost Air Pressure/Temperature Sensor harness connector and Engine Management System (EMS) Module harness connector.
5) Disconnect the Boost Air Pressure/Temperature Sensor harness connector. Connect connector A to the Engine Management System (EMS) Module. Turn the ignition key ON. Measure the voltage between pin 2 of the
Boost Air Pressure/Temperature Sensor harness connector and a good ground. If the measured voltage is between 4.8 and 5.15 volts, check the Boost Air Pressure/Temperature Sensor harness connector for deformed pins or insufficient contact with the Boost Air Pressure/Temperature Sensor pins. If the pins are not damaged, replace the Boost Air Pressure/Temperature Sensor and retest the system. If PID 105 is still active, replace the EMS Module and retest the system.
6) Connect the Boost Air Pressure/Temperature Sensor harness connector. Connect connector A to the Engine Management System (EMS) Module. Turn the ignition key ON. If PID 105 is still active, check the Engine Management System (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 Boost Air Pressure/Temperature Sensor and retest the system. If PID 105 is still active, replace the EMS Module and retest the system. If PID 105 is NOT active, the diagnostic procedures have corrected the problem. Check all connectors to ensure proper connections.

Fault Condition: The Electronic Malfunction Lamp (EML) will turn on and PID 105 will set when the EMS Module senses that the Boost Pressure and Temperature Sensor signal voltage is less than 0.1 volts or greater than 4.55 volts. If the Boost Air Pressure/Temperature Sensor voltage is between 0.1 volts and 4.55 volts, the fault will become inactive.

If both PID 105 FMI 5 is present, there may be intermittent or total loss of the ground at connector A pin 11 of the EMS Module.

Possible repairs:

Turn the ignition key OFF first.

1) Disconnect the Boost Air Pressure/Temperature Sensor connector. Measure the resistance between pins 1 and 2 of the Boost Air Pressure/Temperature Sensor with the ambient air temperature between 32° and 203°F (0° and 95°C). If the measured resistance is NOT between 5887 and 213.67 ohms, replace the sensor.
2) Disconnect the Boost Air Pressure/Temperature Sensor connector. Check for continuity between pin 1 of the Boost Air Pressure/Temperature Sensor and a good ground. Check for continuity between pin 2 of the Boost Air Pressure/Temperature Sensor and a good ground. Check for continuity between pin 3 of the Boost Air Pressure/Temperature Sensor and a good ground. Check for continuity between pin 4 of the Boost Air Pressure/Temperature Sensor and a good ground. If continuity exists on any pin, replace the Boost Air Pressure/Temperature Sensor.
3) Disconnect the Boost Air Pressure/Temperature Sensor harness connector. Measure the resistance between pins 1 and 2 of the Boost Air Pressure/Temperature Sensor with the ambient air temperature between 32° and 203°F (0° and 95°C). If the measured resistance is NOT between 5887 and 213.67 ohms, replace the Boost Air Pressure/Temperature Sensor.
4) disconnect the Boost Air Pressure/Temperature Sensor harness connector. Disconnect Engine Management System (EMS) Module connector A. Check for continuity between pin 2 of the Boost Air Pressure/Temperature Sensor harness connector and Engine Management System (EMS) Module harness connector A pin 47. If there is NO continuity, locate and repair the open in the signal circuit between the Boost Air Pressure/Temperature Sensor harness connector and Engine Management System (EMS) Module harness connector.
5) Disconnect the Boost Air Pressure/Temperature Sensor harness connector. Connect connector A to the Engine Management System (EMS) Module. Turn the ignition key ON. Measure the voltage between pin 2 of the
Boost Air Pressure/Temperature Sensor harness connector and a good ground. If the measured voltage is between 4.8 and 5.15 volts, check the Boost Air Pressure/Temperature Sensor harness connector for deformed pins or insufficient contact with the Boost Air Pressure/Temperature Sensor pins. If the pins are not damaged, replace the Boost Air Pressure/Temperature Sensor and retest the system. If PID 105 is still active, replace the EMS Module and retest the system.
6) Connect the Boost Air Pressure/Temperature Sensor harness connector. Connect connector A to the Engine Management System (EMS) Module. Turn the ignition key ON. If PID 105 is still active, check the Engine Management System (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 Boost Air Pressure/Temperature Sensor and retest the system. If PID 105 is still active, replace the EMS Module and retest the system. If PID 105 is NOT active, the diagnostic procedures have corrected the problem. Check all connectors to ensure proper connections.