41-2

SH-AWD DTC Troubleshooting: 41-2

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

NOTE: Before you troubleshoot, review the general troubleshooting information. Initial Inspection and Diagnostic Overview

1. Turn the ignition switch to ON (II).

2. Make sure the HDS communicates with vehicle and the SH-AWD control unit. If it doesn't, troubleshoot the DLC circuit. Testing and Inspection

3. Check for PGM-FI DTC's 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. 38 and No. 39.


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. 38 and No. 39 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 - Update the SH-AWD control unit if it does not have the latest software, SH-AWD Control Unit Update or substitute a known-good SH-AWD control unit Service and Repair 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. Service and Repair

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