Volvo All Engines (2004 Emissions) Fault Code: PSID 232 FMI 2 CAN 2 J1939 Communication Link A

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.