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

Instrumentation, Message Center and Warning Chimes

Pinpoint Tests

Pinpoint Test M: The LH/RH Turn or High Beam Indicator Is Never/Always On

Normal Operation

When the multifunction switch is in the LH/RH TURN position or the headlamps are in the HIGH BEAM position, a message is sent to the Instrument Cluster (IC) from the Smart Junction Box (SJB) through the Medium Speed Controller Area Network (MS-CAN), to flash the LH/RH turn signal indicator on and off or to turn on the high beam indicator.

This pinpoint test is intended to diagnose the following:

- Exterior lighting concern
- SJB
- IC



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

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M1 VERIFY THE LH/RH TURN SIGNAL OR HIGH BEAM OPERATION


- Ignition ON.
- Operate the LH/RH turn signals or the high beams. Observe the LH/RH turn signal or high beam lamps.
- Do the LH/RH turn signal or high beam lamps operate correctly?

Yes
GO to M2.

No
REFER to Lighting and Horns.

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M2 RETRIEVE THE RECORDED DTCs FROM THE IC SELF-TEST


- Check for recorded IC DTCs from the self-test.
- Are any DTCs recorded?

Yes
For DTC U0140, GO to Pinpoint Test AQ. Pinpoint Tests AQ: DTC U0140

For all other DTCs, REFER to DTC Charts. Instrumentation, Message Center and Warning Chimes

No
GO to M3.

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M3 CARRY OUT THE IC INDICATOR LAMP ACTIVE COMMAND USING THE SCAN TOOL


- Enter the following diagnostic mode on the scan tool: IC DataLogger.
- Select the IC left turn indicator (LHTURN), right turn indicator (RHTURN) or high beam indicator (HIGH_BEAM) active command. Command the LH/RH turn or high beam indicator on and off. Observe the LH/RH turn or high beam indicator.
- Does the LH or RH turn signal indicator illuminate when commanded on, and turn off when commanded off?

Yes
INSTALL a new SJB. REFER to Body Control Systems. TEST the system for normal operation.

No
INSTALL a new IC. REFER to Instrument Cluster (IC) Instrument Cluster (IC). TEST the system for normal operation.

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