G6 L4-2.4L VIN B (2006)
Tachometer: Description and Operation
TACHOMETER
The instrument panel cluster (IPC) displays the engine speed as determined by the powertrain control module (PCM) or the engine control module
(ECM). The IPC receives a GMLAN message from the body control module (BCM) indicating the engine speed. The tachometer will default to 0 RPM
if:
-
The PCM/ECM detects a malfunction in the engine speed sensor circuit.
-
The IPC detects a loss of GMLAN communications with the BCM.
