## Gauges

#### Vehicle Speed Signal Circuit Troubleshooting

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Special Tools Required: Test Harness 07LAJ-PT3020A Before testing, inspect the No. 4 (10A) and No. 10 (7.5A) fuses in the under-dash fuse/relay box.

1. Disconnect the 3P connector from the vehicle speed sensor (VSS) (A).

2. Connect the test harness only to the engine wire harness.
3. Connect the RED test harness clip (B) to the positive prove of an ohmmeter. Cover the white (C) and green (D) test harness with protective tape (E).
4. Check for continuity between the RED test harness clip and body ground.

Is there continuity?

YES – Go to step 5.

NO – Repair open in the BLK wire between the VSS and G101.

5. Connect the WHT test harness clip (B) to the positive probe of a voltmeter, and connect the RED test harness clip (C) to the negative probe.

6. Turn the ignition switch ON (II).

Is there battery voltage?

YES – Go to step 7.

NO – Repair open in the BLK/YEL wire between the VSS and the under-dash fuse/relay box.

7. Disconnect the WHT test harness clip (B).
8. Connect the GRN test harness clip (D) to the positive probe of a voltmeter.

Is there 5 V or more?

YES – Go to step 9.

NO – Repair short in the BLU/WHT wire between the VSS and the cruise control unit, or the ECM/PCM.