Tachometer: Testing and Inspection

1. Remove cluster.

Printed Circuit Board Connectors:

2. Turn the ignition switch ON and check for voltage at cavity K of the instrument cluster grey connector.

3. Check cavity F of the instrument cluster red connector for continuity to ground.
4. Check for tachometer signal from the engine controller by connecting an AC digital voltmeter between cavity H of the instrument cluster grey connector and ground. A reading of at least 1.0 volts should be present while the engine is running.
^ If voltage is within specifications, go to step 6.

Engine Controller Pin Location:

5. If there is less than 1.0 volts at cavity H, check for continuity between cavity H of the instrument cluster and pin 43 of the engine controller connector.
^ If continuity is good and no pins or terminals are damaged, replace the engine controller.

Tachometer Drive Module:

6. If all tests performed good, replace the tachometer drive module.
7. If the tachometer continues to be inoperative, replace the tachometer assembly.