Pinpoint Test H : The Tachometer Is Inoperative: Notes
Normal Operation and Fault Conditions
See Tachometer. Refer to: Instrument Panel Cluster (IPC) - System Operation and Component Description .
If the BCM does not receive the engine RPM data from the PCM for longer than 1 second, the BCM and IPC set DTC U0100:00.
If the IPC does not receive the engine RPM data for longer than 1 second, the IPC defaults the tachometer to 0 RPM.
Possible Sources
- PCM concern
- IPC