Test Z: The Charging System Warning Indicator Is Never/Always On (Base Instrument Cluster [IC]

PINPOINT TEST Z: THE CHARGING SYSTEM WARNING INDICATOR IS NEVER/ALWAYS ON (BASE INSTRUMENT CLUSTER [IC]

Normal Operation
The charging system warning indicator is controlled by the instrument cluster (IC) based upon data received from the PCM over the high speed controller area network (HS-CAN). When a generator malfunction occurs that prevents the generator from charging the battery, the generator regulator grounds the PCM input to ground. The PCM senses the ground state and sends a communication message over the HS-CAN to the instrument cluster (IC) to illuminate charging system warning indicator, which indicates a charging system fault has occurred.

This pinpoint test is intended to diagnose the following:
- Charging system concern
- PCM
- Instrument cluster (IC)

Z1-Z4: