Volvo

Fault Condition: PPID 35 will set with FMI 5 if the EGR ECU detects an open in the exhaust gas temperature probe circuit.

Possible repairs:

Turn the ignition key OFF first.

1) If the FMI is 3 (voltage high/open) or 5 (current low/open), replace the EGR Mass Flow Sensor assembly and retest the system.
2)Remove connector A from the EGR ECU. Turn the ignition switch ON. Check for battery voltage (+12V) between pin 2 of EGR ECU connector A and a known good ground. If battery voltage is NOT present, a problem exists between EGR ECU connector A pin 2 and the power supply from the EMS Relay. Inspect the EGR ECU and EMS Relay connectors for damaged or loose pins. If the connectors are in good condition, locate and repair the open circuit, and retest the system.
3) Measure the resistance between EGR ECU connector A pin 1 and a known good ground. If the measured resistance does not indicate acceptable continuity to ground, a problem exists between EGR ECU connector A and
ground. Locate and repair the problem and retest the system.
4) Disconnect harness connector B from the Engine Management System (EMS) Module. Disconnect harness connector A from the EGR ECU. Measure the resistance between Engine Management System (EMS) Module connector B pin 52 and EGR ECU connector A pin 3. If the measured resistance does NOT indicate continuity, locate and repair the open circuit in the J1939 circuit between the Engine Management System (EMS) Module and the EGR ECU.
5) Disconnect harness connector B from the Engine Management System (EMS) Module. Disconnect harness connector A from the EGR ECU. Measure the resistance between Engine Management System (EMS) Module
connector B pin 56 and EGR ECU connector A pin 6. If the measured resistance does NOT indicate continuity, locate and repair the open circuit in the J1939 circuit between the (EMS) Module and the EGR ECU.
6) Replace the EGR ECU and Mass Flow Sensor Assembly with a known good unit. Check the system for diagnostic codes. If code PPID 35 is still set, reinstall the original EGR ECU and replace the EMS Module. Retest the system.
If code PPID 35 is NOT set, replacing the EGR ECU and Mass Flow Sensor Assembly has corrected the problem.

Fault Condition:

Code PPID 55 will set when there is an internal error within the Engine Management System (EMS) Module. The EMS Module must be replaced if this fault occurs.

Fault Condition: The Engine Retarder Percent code will set when the Engine Management System (EMS) Module has lost the Engine Retarder Percent signal from the Vehicle Electronic Control Unit (VECU).

Possible repairs:

1) Verify that code PPID 86 is set. If code PPID 86 is not set, wiggle the harness and connectors to try to set the code. Visually inspect the VECU connectors and wires for poor connections.
2) Turn the ignition key OFF and connect a diagnostic computer. Turn the ignition key ON. Use the diagnostic computer to attempt to communicate with the Vehicle Electronic Control Unit (VECU).
If communication can be made with the Vehicle Electronic Control Unit (VECU), the fault may be intermittent, wiggle the harness and connectors to try to set the code. If fault in the harness is found, repair or replace the harness.
If there is NO communication with the Vehicle Electronic Control Unit (VECU) via the diagnostic tool, go to the Trouble Shooting Procedure for the Data Lines.

Fault Condition: Code PSID 201 will set when the Engine Management System (EMS) Module loses communication with the Vehicle Electronic Control Unit (VECU) on the J1939 data line. The fault will become inactive if communication resumes. If communication is lost on both the J1587 and J1939 data lines, the engine will still run using the idle validation switch.

Possible repairs:

1) If code PSID 201 is NOT set, wiggle the EMS Module and VECU harnesses and connectors to try to set the code. Visually inspect the EMS Module and VECU connectors and wires for poor connections.
2) Disconnect the Vehicle Electronic Control Unit (VECU) connector A. Turn the ignition key ON. Measure the voltage between Vehicle Electronic Control Unit (VECU) connector A pin 13 and a good ground. Then measure the voltage between Vehicle Electronic Control Unit (VECU) connector A pin 14 and a good ground. If the measured voltage is 0 volts, check the battery power circuit to the Vehicle Electronic Control Unit (VECU). If the measured voltage is NOT approximately battery voltage at either pin, check the battery power circuit and connectors for loose, corroded or damaged terminals and repair as necessary.
3) Disconnect the Vehicle Electronic Control Unit (VECU) connector A. Turn the ignition key ON. Disconnect the Vehicle Electronic Control Unit (VECU) connector A. Check for continuity between Vehicle Electronic Control Unit (VECU) connector A pin 12 and a good ground. If continuity does NOT exist, repair the open in the ground circuit.
4) Turn the ignition switch OFF. Disconnect the Engine Management System (EMS) Module connector B. Disconnect the Vehicle Electronic Control Unit (VECU) connector C. Check for continuity between Engine Management System (EMS) Module connector B pin 55 and Vehicle Electronic Control Unit (VECU) connector C pin 5. If continuity does NOT exist, locate and repair the open in the data line and retest the system.
5) Turn the ignition switch OFF. Disconnect the Engine Management System (EMS) Module connector B. Disconnect the Vehicle Electronic Control Unit (VECU) connector C. Check for continuity between Engine Management System (EMS) Module connector B pin 51 and Vehicle Electronic Control Unit (VECU) connector C pin 4. If continuity exists, check the Engine Management System (EMS) Module harness and all connections for loose,
corroded or damaged terminals and repair or replace as necessary. If no loose, corroded or damaged terminals are found, replace the Engine Management System (EMS) Module.
If continuity does not exists, locate and repair the open in the data line and retest the system.

Fault Condition: Code PSID 232 will
set when the Engine Management System (EMS)
Module is unable to send and/or receive information across the J1939 CAN2 data line. If the Engine Management System (EMS) Module loses communication with the VGT SRA Module or the EGR MFS Amplifier on the J1939 CAN2 data line, code PSID 232 will set and the Electronic Malfunction Lamp (EML) will turn on. The fault will become inactive if communication resumes.

Possible repairs:

Turn the ignition switch OFF first.

1) If code PSID 232 is NOT set, wiggle the EMS Module harness and connectors to try to set the code. Visually inspect the EMS Module connectors and wires for poor connections.
2) Disconnect the Variable Geometry Turbo (VGT), Exhaust Gas Recirculation (EGR) ECU and Engine Management System (EMS) Module. Turn the ignition switch ON. Measure for voltage between Engine Management System (EMS) Module connector B pin 52 and a good ground. Then measure for voltage between Engine Management System (EMS) Module connector B pin 56 and a good ground. If the measured voltage is NOT 0 volts, locate and repair the short in the harness.
3) Disconnect the Variable Geometry Turbo (VGT), Exhaust Gas Recirculation (EGR) ECU and Engine Management System (EMS) Module. Measure for continuity between Engine Management System (EMS) Module connector B pin 52 and a good ground. Then measure for continuity between Engine Management System (EMS) Module connector B pin 56 and a good ground. If continuity exists, locate and repair the
short to ground in the J1939 CAN 2 Data Line harness.
4) Disconnect the Variable Geometry Turbo (VGT), Exhaust Gas Recirculation (EGR) ECU and Engine Management System (EMS) Module. Check for continuity between Engine Management System (EMS) Module
connector B pin 52, Exhaust Gas Recirculation (EGR) ECU pin 3 and Variable Geometry Turbocharger Smart Remote Actuator (VGT SRA) pin 5. Then measure for continuity between Engine Management System (EMS) Module connector B pin 56, Exhaust Gas Recirculation (EGR) ECU pin 6, and Variable Geometry Turbocharger Smart Remote Actuator (VGT SRA) pin 6. If continuity does NOT exists, locate and repair the open in the J1939 CAN 2 Data
Line harness.
5) Disconnect and inspect the Engine Management System (EMS) Module connector B, the Variable Geometry Turbocharger (VGT) module connector, and the Exhaust Gas Recirculation (EGR) ECU) connector. Measure the continuity between Engine Management System (EMS) Module connector B pin 52 and Engine Management System (EMS) Module connector B pin 56. If continuity exists, repair or replace the J1939 CAN 2 Data Line.
6) Disconnect and inspect the Engine Management System (EMS) Module connectors and inspect for loose, corroded or damaged terminals. If any loose, corroded or damaged terminals are found, repair or replace as necessary and retest the system. If all terminals appear in good condition, replace the Engine Management System (EMS) Module.

Fault Condition: If the Engine Management System (EMS) Module detects a fault in the electrical circuit while attempting to operate the Fuel Injector Unit, the Electronic Malfunction Lamp (EML) will turn ON and code SID 1 will set.

Possible repairs:

Turn the ignition switch OFF first.

1) Disconnect the harness electrical connector from Fuel Injector Unit #1. Check for continuity between the pins 1 and 2 of the Fuel Injector Unit #1. If the resistance is NOT between 0.9-5.2 Ohms at 68°F (20°C) or 1.5-5.8 Ohms at 218°F (103°C), Fuel Injector #1 is faulty and must be replaced.
2) Disconnect the harness electrical connectors from Fuel Injector Unit #1. Check for continuity from pins 1 and 2 on Fuel Injector Unit #1 to a good ground. If continuity exists, the Fuel Injector Unit #1 is shorted to ground and must be replaced.
3) Disconnect connectors A and B from the Engine Management System (EMS) Module. Disconnect the harness connector from Fuel Injector Unit #1. Check for continuity between the Fuel Injector Unit #1 harness connector pin 1 and 2 and a good ground.
4) Disconnect connectors A and B from the (EMS) Module. Check for continuity between EMS Module harness connector A pin 62 and pin 1 of the Fuel Injector Unit #1. If there is NO continuity, repair the open in the circuit.
5) Disconnect connectors A and B from the (EMS) Module. Check for continuity between pin 2 of the the Fuel Injector Unit #1 and EMS Module harness connector A pin 20. If there is NO continuity, repair the open in the circuit.
6) Disconnect connectors A and B from the (EMS) Module. Turn the ignition key ON. Measure the voltage between EMS Module connector A pin 62 and a good ground. If voltage is present, the voltage supply circuit is shorted to voltage. Locate and repair the short circuit.
7) Disconnect (EMS) Module connectors A and B. Disconnect the harness connector from Fuel Injector Unit #1. Turn the ignition key ON. Measure the voltage between the EMS Module connector A pin 20 and a good ground. If voltage is present, the Fuel Injector Unit #1 control line is shorted to voltage. Locate and repair the short.
8) Disconnect connector A and B from the (EMS) Module. Disconnect the harness electrical connector from the Fuel Injector Unit #1. Check for continuity between EMS Module harness connector A pin 20 and/or 62 and all other pins on EMS Module connectors A and B. If continuity exists, the Fuel Injector Unit #1 circuit is shorted to one of the other EMS Module circuits. Locate and repair the short circuit.
9) Disconnect the harness electrical connector from Fuel Injector Unit #1. Check for continuity between the pins 3 and 4 of the Fuel Injector Unit #1. If the resistance is NOT between 0.9-5.2 Ohms at 68°F (20°C) or 1.5-5.8 Ohms at 218°F (103°C), Fuel Injector #1 is faulty and must be replaced.
10) Disconnect the harness electrical connectors from Fuel Injector Unit #1. Check for continuity from either pin on Fuel Injector Unit #1 to a good ground. If continuity exists, the Fuel Injector Unit #1 is shorted to ground and must be replaced.
11) Disconnect connectors A and B from the (EMS) Module. Disconnect the harness connector from Fuel Injector Unit #1. Check for continuity between the Fuel Injector Unit #1 harness connector pin 3 and pin 4 and a good ground. If continuity exists, the circuit is shorted to ground. Locate and repair the short circuit.
12) Disconnect connectors A and B from the (EMS) Module. Disconnect the harness connector from Fuel Injector Unit #1. Check for continuity between EMS Module harness connector A pin 59 and pin 3 of the Fuel Injector Unit #1. If there is NO continuity, repair the open in the circuit.
13) Disconnect connectors A and B from the (EMS) Module. Disconnect the harness connector from Fuel Injector Unit #1. Check for continuity between pin 4 of the the Fuel Injector Unit #1 and EMS Module harness connector A pin 24. If there is NO continuity, repair the open in the circuit.
14) Disconnect connectors A and B from the (EMS) Module. Turn the ignition key ON. Measure the voltage between EMS Module connector A pin 59 and a good ground. If voltage is present, the voltage supply circuit is shorted to voltage. Locate and repair the short circuit.
15) Disconnect (EMS) Module connectors A and B. Disconnect the harness connector from Fuel Injector Unit #1. Turn the ignition key ON. Measure the voltage between the EMS Module connector A pin 24 and a good ground. If voltage is present, the Fuel Injector Unit #1 control line is shorted to voltage. Locate and repair the short.
16) Disconnect connector A and B from the (EMS) Module. Disconnect the harness electrical connector from the Fuel Injector Unit #1. Check for continuity between EMS Module harness connector A pin24 and/or 59 and all other pins on EMS Module connectors A and B. If continuity exists, the Fuel Injector Unit #1 circuit is shorted to one of the other EMS Module circuits. Locate and repair the short circuit.
17) Disconnect connectors A and B from the EMS Module. Visually inspect EMS Module connectors A and B for dirt, loose pins or deformed contacts. If a pin feels loose or appears damaged, repair the connector.
18) Ensure that there is fuel in the fuel tank. Inspect the fuel lines between the tank and the transfer pump for sharp bends or kinks, and repair as needed. Check for air in the fuel system, and repair as needed. Check the fuel pressure at the secondary fuel filter outlet. If the fuel pressure is NOT within specifications, perform any required fuel system repairs. Remove Fuel Injector Unit #1 from the engine and inspect for surface rust between the O-rings. If rust is present, locate the source of the fuel contamination and replace any damaged components. If all of the mechanical fuel system components are in good working order, replace the EMS Module and retest the system.