Pinpoint Test Q : The Charging System Warning Indicator Is Never Or Always On
- Normal Operation and Fault Conditions
See Charging System Indicator. REFER to: Instrument Panel Cluster (IPC) - System Operation and Component Description .
If the battery low state of charge message is missing for less than 5 seconds, the IPC defaults the charging system warning indicator to the last indication state (on or off), based upon on the last message received.
If the battery low state of charge message is missing for 5 seconds or longer, the IPC defaults the charging system warning indicator on.
Possible Sources
- Charging system concern
- Communication concern
- BCM
- IPC
- Q1 PERFORM THE IPC (INSTRUMENT PANEL CLUSTER) SELF-TEST
- Using a diagnostic scan tool, perform the IPC self-test.
Are any Diagnostic Trouble Codes (DTCs) recorded?
Yes REFER to DTC Chart: Instrument Panel Cluster (IPC) No GO to Q3 - Q2 RETRIEVE THE RECORDED DTCS FROM THE BCM (BODY CONTROL MODULE) SELF-TEST
- Ignition ON.
- Using a diagnostic scan tool, perform the BCM self-test.
Are any Diagnostic Trouble Codes (DTCs) recorded?
Yes REFER to: Body Control Module (BCM) . No GO to Q3 - Q3 CHECK THE GWM (GATEWAY MODULE A) DIAGNOSTIC TROUBLE CODES (DTCS)
- Using a diagnostic scan tool, check the GWM Continuous Memory Diagnostic Trouble Codes (CMDTCs).
Are any Diagnostic Trouble Codes (DTCs) recorded?
Yes REFER to: Communications Network . No GO to Q4 - Q4 PERFORM THE IPC (INSTRUMENT PANEL CLUSTER) INDICATOR LAMP CONTROL ACTIVE COMMAND USING A DIAGNOSTIC SCAN TOOL
- Ignition ON.
- Using a diagnostic scan tool, view the IPC Parameter Identifications (PIDs).
- Select the IPC charging system warning indicator (CHARGE_LMP) PID.
- Command the charging system warning indicator on then off. Observe the charging system warning indicator.
Does the charging system warning indicator turn on when commanded on and turn off when commanded off?
Yes If the charging system warning indicator is never on, the system is operating correctly at this time. If the charging system warning indicator is always on, INSTALL a new BCM. REFER to: Body Control Module (BCM) . No INSTALL a new IPC. REFER to: Instrument Panel Cluster (IPC) .