DTC 41-2

DTC 41-1, 41-2: CAN Communication (PCM/VSA System)

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

1. Turn the ignition switch ON (II).
2. Clear the DTC.
3. Test-drive the vehicle, and check for DTCs with the HDS.

Is DTCs 41-1 and/or 41-2 indicated?

YES - Go to step 4.

NO - Intermittent failure, the system is OK at this time.

4. Check for a PCMNSA system DTCs.

Is there a DTCs?

YES - Troubleshoot the indicated PCMNSA DTCs.

NO - Go to step 6.

5. Disconnect the VTM-4 control unit connector A (44P), and VSA modulator-control unit 46P connector.
6. Turn the ignition switch OFF.
7. Jump the SCS line with the HDS.
8. Disconnect the PCM connector A (44P).
9. Check for continuity between the VTM-4 control unit connector A (22P) terminal No. 11 and PCM connector A (44P) terminal No. 44, and between the VTM-4 control unit connector A (22P) terminal No. 11 and VSA modulator-control unit 46P connector terminal No. 33.





Is there continuity?

YES - Go to step 10.

NO - Repair open in the wire between the VTM-4 control unit (A11) and the PCM (A44), the VSA modulator-control unit.

10. Check for continuity between the VTM-4 control unit connector A (22P) terminal No. 22 and PCM connector A (44P) terminal No. 9, and between the VTM-4 control unit connector A (22P) terminal No. 22 and VSA modulator-control unit 46P connector terminal No. 12.





Is there continuity?

YES - Check for poor connections or loose terminals at the VTM-4 control unit, PCM, VSA modulator-control unit connectors. If the connections are OK, replace the VTM-4 control unit.

NO - Repair open in the wire between the VTM-4 control unit (A22) and the PCM (A9), the VSA modulator-control unit.