Pinpoint Test U: The Speed Control Indicator Is Never/Always On
Instrumentation, Message Center and Warning Chimes
Pinpoint Test U: The Speed Control Indicator Is Never/Always On
Normal Operation
The Instrument Cluster (IC) receives the speed control signal from the PCM over the High Speed Controller Area Network (HS-CAN) communication bus. When the speed control is engaged, the PCM sends a message to the IC to illuminate the speed control indicator.
If the speed control message is missing for less than 5 seconds, the IC defaults the speed control indicator to the last on/off state, based upon the last known good speed control message received.
If the speed control message is missing for more than 5 seconds, the IC sets DTC U0100 in continuous memory and defaults the speed control indicator off.
NOTE: If DTC U0100 is set in the IC, other observable symptoms may be an inoperative speedometer, tachometer or odometer.
This pinpoint test is intended to diagnose the following:
- PCM
- IC
PINPOINT TEST U: THE SPEED CONTROL INDICATOR IS NEVER/ALWAYS ON
