Pinpoint Test W: The LH (Left-Hand) - RH (Right-Hand) Turn Signal, Front Fog Lamp Or Lights On Indicator Is Never Or Always On
- Normal Operation and Fault Conditions
See LH- RH Turn Signal Indicator, Front Fog Lamps Indicator or Lights On Indicator. REFER to: Instrument Panel Cluster (IPC) - Overview .
If the LH turn indicator, RH turn indicator, front fog lamp indicator request or parklamp status message is missing for less than 5 seconds, the IPC defaults the turn signal, front fog lamp or lights on indicator to its last state (on or off), based upon the last known good message received.
If the LH turn indicator, RH turn indicator, front fog lamp indicator request or parklamp status message is missing for 5 seconds or longer, the IPC defaults the turn signal, front fog lamp or lights on indicator off.
Possible Sources
- Turn signal concern
- Front fog lamp concern
- Parking lamp concern
- Communication concern
- GWM concern
- BCM concern
- IPC
- W1 CHECK THE EXTERIOR LIGHTING OPERATION
- Ignition ON.
- Check the operation of the parking lamps, front fog lamps or turn signals.
Do the parking lamps, front fog lamps or turn signals operate correctly?
Yes GO to W2 No For front fog lamps, REFER to Fog Lamps . For parking lamps, REFER to: Parking, Rear and License Plate Lamps . For turn signals, REFER to: Turn Signal and Hazard Lamps . - W2 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: IPC in Diagnostic Trouble Code (DTC) Chart . No GO to W3 - W3 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 W4 - W4 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 For the front fog lamp indicator, GO to W5 For the LH or RH turn indicator, GO to W6 For the lights on indicator, GO to W7 - W5 CHECK THE FOG LAMP INDICATOR OPERATION USING A DIAGNOSTIC SCAN TOOL
- Using a diagnostic scan tool, view the IPC Parameter Identifications (PIDs).
- Access the IPC and control the F_FOG_IND PID
- Command the front fog lamp indicator on then off while monitoring the indicator.
Does the 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) . - W6 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).
- Access the IPC and control the LH_TURN_L PID
- Access the IPC and control the RH_TURN_L 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) . - W7 CHECK THE LIGHTS ON INDICATOR OPERATION USING A DIAGNOSTIC SCAN TOOL
- Using a diagnostic scan tool, view the IPC Parameter Identifications (PIDs).
- Access the IPC and control the SIDELIGHT_LMPPID
Does the lights on 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) .