DTC 26-1

DTC 26-1: VSA Modulator-Control Unit or Wire Harness

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 DTC 26-1 indicated?

YES - Go to step 4.

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

4. Check for DTCs in the VSA system with the HDS.

Are there any VSA DTCs indicated?

YES - Go to the indicated DTCs troubleshooting.

NO - Go to step 5.

5. Turn the ignition switch OFF.
6. Raise the vehicle, and make sure it is securely supported.
7. Turn the ignition switch ON (II).
8. Measure voltage between the No. 3, No. 5, No. 7, and No. 9 terminals of the VTM-4 control unit connector A (22P) and body ground while rotating the appropriate wheel one rotation a second.





Are all four readings about 2 V to 3 V?

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

NO - Check for poor connections or loose terminals between the VTM-4 control unit and the VSA modulator-control unit. If the connections are OK, replace the VSA modulator-control unit.