Test M

PINPOINT TEST M: THE TACHOMETER IS INOPERATIVE

Test M1:

Test M2:

Normal Operation
Engine rpm data is provided to the instrument cluster by the powertrain control module (PCM) through the standard corporate protocol (SCP) communication network, circuits 914 (TN/OG) and 915 (PK/LB).

Possible Causes
- PCM
- instrument cluster