Test D: The Tachometer Is Inoperative

PINPOINT TEST D: THE TACHOMETER IS INOPERATIVE

D1-D4:

Normal Operation
The powertrain control module (PCM) uses the crankshaft position sensor to measure the engine rpm, and sends the instrument cluster the data over the communication network, to command the tachometer gauge according to the data.

Possible Causes
- PCM
- instrument cluster