Pinpoint Test R: The LH/RH Turn Or High Beam Indicator Is Never/Always On

Instrumentation, Message Center and Warning Chimes

Pinpoint Test R: The LH/RH Turn Or High Beam Indicator Is Never/Always On

Normal Operation

When the multifunction switch is in the LH or RH TURN position, a turn signal on/off request is sent to the Instrument Panel Cluster (IPC) from the Body Control Module (BCM) over the High Speed Controller Area Network (HS-CAN). Upon receipt of the applicable turn signal on/off request, the IPC (Instrument Panel Cluster) flashes the turn signal indicator on and off.

When the high beams are turned on, the BCM (Body Control Module) sends a high beam indicator on request to the IPC (Instrument Panel Cluster) through the HS-CAN (High Speed Controller Area Network) to illuminate the high beam indicator.

If the high beam indicator request status message is missing for less than 5 seconds, the IPC (Instrument Panel Cluster) defaults the high beam indicator to its last state (on or off) based upon the last known good message received. If the high beam indicator request status message is missing for more than 5 seconds, the IPC (Instrument Panel Cluster) sets DTC U0140:00 in continuous memory and defaults the high beam indicator off.

This pinpoint test is intended to diagnose the following:

- Turn signal concern

- High beam concern

- BCM (Body Control Module)

- IPC (Instrument Panel Cluster)

PINPOINT TEST R : THE LH/RH TURN OR HIGH BEAM INDICATOR IS NEVER/ALWAYS ON

R1 DETERMINE THE FAULT CONDITION

- Turn the high beams on then off again.

- Ignition ON.

- Observe the high beam indicator.

Does the high beam indicator illuminate when the high beams are on and turn off when the high beams are off?

Yes
GO to R4.
No
LEAVE the headlamp switch in the HIGH BEAM position. GO to R2.

R2 CHECK THE HIGH BEAM HEADLAMPS OPERATION

- Observe the high beam headlamps.

Do the high beam headlamps operate correctly?

Yes
GO to R3.
No
REFER to Lighting and Horns.

R3 CARRY OUT THE IPC (Instrument Panel Cluster) INDICATOR LAMP CONTROL ACTIVE COMMAND USING THE SCAN TOOL

- Ignition ON.

- Enter the following diagnostic mode on the scan tool: IPC (Instrument Panel Cluster) DataLogger.

- Select the IPC (Instrument Panel Cluster) high beam indicator (HIGH_BEAM).

- Command the high beam indicator on and off. Observe the high beam indicator.

Does the high beam indicator illuminate when commanded on and turn off when commanded off?

Yes
GO to R6.
No
INSTALL a new IPC (Instrument Panel Cluster). REFER to Instrument Panel Cluster (IPC) . TEST the system for normal operation.

R4 CHECK THE LH OR RH TURN SIGNAL LAMPS OPERATION

- Ignition ON.

- Operate the LH or RH turn signal. Observe the exterior LH or RH turn signal lamps.

Do the exterior turn signal lamps operate correctly?

Yes
GO to R5.
No
REFER to Lighting and Horns.

R5 CARRY OUT THE IPC (Instrument Panel Cluster) INDICATOR LAMP CONTROL ACTIVE COMMAND USING THE SCAN TOOL

- Enter the following diagnostic mode on the scan tool: IPC (Instrument Panel Cluster) DataLogger.

- Select the IPC (Instrument Panel Cluster) RH or LH turn signal indicator (RH_TURN_L) or (LH_TURN_L) active command. Command the RH or LH turn signal indicator on and off. Observe the LH or RH turn signal indicator.

Does the LH or RH turn signal indicator illuminate when commanded on and turn off when commanded off?

Yes
GO to R6.
No
INSTALL a new IPC (Instrument Panel Cluster). REFER to Instrument Panel Cluster (IPC) . TEST the system for normal operation.

R6 RETRIEVE THE RECORDED DTCs FROM THE IPC (Instrument Panel Cluster) SELF-TEST

- Check for recorded IPC (Instrument Panel Cluster) DTCs from the self-test.

Is DTC U0140:00 recorded?

Yes
GO to Pinpoint Test AY. Pinpoint Test AY: DTC U0140:00
No
INSTALL a new BCM (Body Control Module). TEST the system for normal operation.