41-1

SH AWD DTC Troubleshooting: 41-1

DTC 41-1:

F-CAN Malfunction (Lost Communication with Powertrain Control Module (PCM))

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

1. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

2. Clear the DTC with the HDS.

3. Start the engine.

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

Are there any PGM-FI system DTCs indicated?

YES -

Go to the indicated DTC's troubleshooting.

NO -

Go to step 5.

5. Check for DTCs with the HDS.

Is DTC 41-1 indicated?

YES -

Go to step 6.

NO -

Intermittent failure, the system is OK at this time. Check for an intermittent open between SH-AWD control unit connector terminals A10 and A20 and PCM connector terminals A48 and A49.

6. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

7. Jump the SCS line with the HDS.

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

8. Disconnect PCM connector A (49P).

9. Disconnect SH-AWD control unit connector A (20P).

10. Check for continuity between PCM connector terminals A48, A49 and SH-AWD control unit connector terminals A10, A20 respectively.





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 an open in the wires between the SH-AWD control unit and the PCM.