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 DTCs with the HDS.
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 DTC's troubleshooting.
NO - Go to step 5.
5. Turn the ignition switch OFF.
6. Raise the vehicle on the lift.
7. Turn the ignition switch ON (II).
8. Measure voltage between the A3, A5, A7, and A9 terminals of the VTM-4 control unit and body ground while rotating the appropriate wheel (1 rotation/second).





Do all four readings change from 0 V to about 5 V repeatedly?
YES - Check for loose terminal fit in the VTM-4 control unit. If it is normal, replace the VTM-4 control unit.
NO - Check for loose wires or poor connections between the VTM-4 control unit and the VSA modulator-control unit. If it is normal, replace the VSA modulator-control unit.