Pinpoint Test O: The High Beam Indicator Is Never/Always On

Instrumentation, Message Center and Warning Chimes

Pinpoint Tests

Pinpoint Test O: The High Beam Indicator Is Never/Always On

Normal Operation

When the high beams are turned on, the Lighting Control Module (LCM) sends a signal to the Instrument Cluster (IC) over the Standard Corporate Protocol (SCP) communication network to illuminate the high beam indicator.

This pinpoint test is intended to diagnose the following:

- High beam headlamps
- LCM
- IC

PINPOINT TEST O: THE HIGH BEAM INDICATOR IS NEVER/ALWAYS ON

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O1 CHECK THE HIGH BEAM HEADLAMPS


- Ignition ON.
- Turn the high beam headlamps on. Observe the high beam headlamps.
- Do the high beam headlamps operate correctly?

Yes
GO to O2.

No
REFER to Exterior Lighting Testing and Inspection.

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O2 CARRY OUT THE IC INDICATOR LAMP ACTIVE COMMAND USING THE SCAN TOOL


- Ignition ON.
- Enter the following diagnostic mode on the scan tool: IC DataLogger .
- Select the IC high beam indicator (HIGH_BEAM) active command on and off. Observe the high beam indicator.
- Does the high beam indicator illuminate when selected on and turn off when selected off?

Yes
INSTALL a new LCM. REFER to Multifunction Electronic Modules Service and Repair. 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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