Pinpoint Test U: The LH (Left-Hand) - RH (Right-Hand) Turn Signal, Front Fog Lamp Or High Beam Indicator Is Never Or Always On
- Normal Operation and Fault Conditions
See LH- RH Turn Signal Indicator, Front Fog Lamp Indicator Or High Beam Indicator. REFER to: Instrument Panel Cluster (IPC) - System Operation and Component Description .
If the turn indication data, fog lamp indicator or high beam status message is missing for less than 5 seconds, the IPC defaults the turn signal, fog lamp or high beam indicator to its last indication state (on or off), based upon the last message received.
If the turn indication data, fog lamp indicator or high beam status message is missing for 5 seconds or longer, the IPC defaults the turn signal, fog lamp or high beam indicator off.
Possible Sources
- Turn signal concern
- Front fog lamp concern
- High beam concern
- Communication concern
- BCM
- GWM concern
- IPC
- U1 DETERMINE THE FAULT CONDITION
- Ignition ON.
- Check the operation of the high beams, front fog lamps or turn signals.
Do the high beams, front fog lamps or turn signals operate correctly?
Yes GO to U2 No For front fog lamps, REFER to: Fog Lamps . For high beams, REFER to: Headlamps . For turn signals, REFER to: Turn Signal and Hazard Lamps - U2 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 U3 - U3 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 U4 - U4 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 For the front fog lamp indicator, GO to U5 For the high beam indicator, GO to U6 For the LH or RH turn indicator, GO to U7 - U5 CHECK THE FRONT FOG LAMP INDICATOR OPERATION USING A DIAGNOSTIC SCAN TOOL
- Using a diagnostic scan tool, view the IPC Parameter Identifications (PIDs).
- Select the IPC front fog lamp indicator (F_FOG_IND) PID.
Does the front fog lamp 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. Refer to Instrument Panel Cluster (IPC) . - U6 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. Refer to Instrument Panel Cluster (IPC) . - U7 CHECK THE LH (LEFT-HAND) AND RH (RIGHT-HAND) TURN INDICATOR OPERATION USING A DIAGNOSTIC SCAN TOOL
- Using a diagnostic scan tool, view the IPC Parameter Identifications (PIDs).
- Select the IPC RH (RH_TURN_L) or LH (LH_TURN_L) turn signal indicator PID.
- Command the RH or LH turn signal indicator on and off while observing the RH or LH turn signal indicator.
Does the RH or LH turn signal 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. Refer to Instrument Panel Cluster (IPC) .