DTC 41-1

DTC 41-1: F-CAN Malfunction (Lost Communication with Power Control Module (PCM))

NOTE: Before you troubleshoot, review the general troubleshooting information.

1. Turn the ignition switch to ON (II).
2. Make sure the HDS communicates with the vehicle and the SH-AWD control unit. If it doesn't, troubleshoot the DLC circuit.
3. Check for DTCs in the PGM-FI system with the HDS.

Are there any PGM-FI DTCs indicated?

YES - Go to the indicated DTC's troubleshooting.

NO - Go to step 4.

4. Clear the DTC with the HDS,
5. Start the engine.
6. Check for DTCs with the HDS.

Is DTC 41-1 indicated?

YES - Go to step 7.

NO - Intermittent failure, the system is OK at this time. Check for intermittent open between SH-AWD control unit connector terminals A10 and A20 and PCM connector terminals A36 and A37.

7. Turn the ignition switch to LOCK (0).
8. Jump the SCS line with the HDS.

NOTE: This step must be done to prevent PCM damage.

9. Disconnect PCM connector A (44P).
10. Connect PCM connector terminals A36 and A37 to body ground with jumper wires.





11. Disconnect SH-AWD control unit connector A (20P).
12. Check for continuity between SH-AWD control unit connector terminals A10 and A20 to body ground.





Is there continuity?

YES - Go to step 13.

NO - Repair open in the wires between the SH-AWD control unit and the PCM.

13. Reconnect all connectors.
14. Turn the ignition switch to ON (II).
15. Check for DTCs in the VSA system with the HDS.

Are there any F-CAN communication failure DTCs between the VSA and PGM-FI system indicated?

YES - Update the PCM if it does not have latest software. If the PCM was updated, substitute a known-good PCM and recheck. If the symptom/indication goes away with a known-good PCM, replace the original PCM.

NO - Update the SH-AWD control unit if it does not have the latest software, or substitute a known-good SH-AWD control unit and recheck. If the symptom/indication goes away with the updated SH-AWD control unit, troubleshooting is complete. If the symptom/indication goes away with a known-good SH-AWD control unit, replace the original SH-AWD control unit.