Pinpoint Test V: The High Beam Indicator Is Never Or Always On
- Normal Operation and Fault Conditions
See High Beam Indicator. REFER to: Instrument Panel Cluster (IPC) - System Operation and Component Description .
If the high beam status message is missing for less than 5 seconds, the IPC defaults the high beam indicator to its last indication state (on or off), based upon the last message received.
If the high beam status message is missing for 5 seconds or longer, the IPC defaults the high beam indicator off.
Possible Sources
- Exterior lighting concern
- Communication concern
- BCM concern
- GWM concern
- IPC
- V1 CHECK THE HIGH BEAM LIGHTS
- Turn on the high beams.
Do the high beams operate correctly?
Yes GO to V2 No REFER to: Headlamps . - V2 PERFORM THE IPC (INSTRUMENT PANEL CLUSTER) SELF-TEST
- Ignition ON.
- Using a diagnostic scan tool, perform the IPC self-test.
Are any Diagnostic Trouble Codes (DTCs) recorded?
Yes REFER to DTC Chart: IPC . No GO to V3 - V3 PERFORM THE BCM (BODY CONTROL MODULE) SELF-TEST
- 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 V4 - V4 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 V5 - V5 CHECK THE HIGH BEAM INDICATOR OPERATION USING A DIAGNOSTIC SCAN TOOL
- Using a diagnostic scan tool, view the IPC Parameter Identifications (PIDs).
- Select the IPC high beam indicator (HIGH_BEAM) PID.
- Command the high beam indicator on and off while observing the high beam indicator.
Does the high beam indicator illuminate when commanded on and turn off when commanded off?
Yes INSTALL a new BCM. Refer to BODY CONTROL MODULE (BCM) . No INSTALL a new IPC.Instrument Panel Cluster (IPC)