Tachometer: Testing and Inspection

1. Remove cluster.

Conventional Cluster Connectors:

2. Check for battery voltage at cavity 8 of the instrument cluster right side connector.
3. Turn the ignition switch ON and check for voltage at cavity 9 of the instrument cluster right side connector.
4. Check cavity 14 of the instrument cluster right side connector for continuity to ground.
5. Check for tachometer signal from the engine controller by connecting an AC digital voltmeter between cavity 6 of the instrument cluster left side 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 7.
6. If there is less than 1.0 volts at cavity 6, check for continuity between cavity 6 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.
7. If all tests performed good, replace the tachometer drive module.
8. If the tachometer continues to be inoperative, replace the tachometer assembly.