DTC 41-2

DTC 41-2: F-CAN Malfunction (Lost Communication with VSA)

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 41-2 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 VSA modulator-control unit 46P connector terminals No. 39 and No. 38.

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 the VSA modulator-control unit 46P connector.
10. Connect VSA modulator-control unit 46P connector terminals No. 39 and No. 38 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 VSA modulator-control unit.

13. Check for DTCs in the PGM-FI system with the HDS.

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

YES - Substitute a known-good VSA modulator-control unit and recheck. If the symptom/indication goes away with a known-good VSA modulator-control unit, replace the original SH-AWD control unit.

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.