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

Instrumentation, Message Center and Warning Chimes

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

Normal Operation

When the high beams are turned on, the Smart Junction Box (SJB) sends a signal to the Instrument Cluster (IC) through the communication network to illuminate the high beam indicator.

This pinpoint test is intended to diagnose the following:

- SJB
- IC



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

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P1 CHECK THE HIGH BEAM HEADLAMPS OPERATION


- Turn the headlamp switch to the HIGH BEAMS ON position. Observe the high beam headlamps.
- Do the high beam headlamps operate correctly?

Yes
GO to P2.

No
REFER to Lighting and Horns. Lighting and Horns

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P2 RETRIEVE THE RECORDED DTCs FROM THE IC SELF-TEST


- Check for recorded continuous memory IC DTCs.
- Is DTC U1901 recorded?

Yes
REFER to Information Bus to diagnose communication with the SJB.

No
GO to P3.

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P3 CARRY OUT THE IC WARNING LAMPS AND CHIME 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. 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
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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