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

Instrumentation, Message Center and Warning Chimes

Pinpoint Test X: 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 Medium Speed Controller Area Network (MS-CAN) communication bus to illuminate the high beam indicator. If the high beam status message is missing for more than 5 seconds, the IC (Instrument Cluster) sets DTC U0140 in continuous memory and defaults the high beam indicator off.

NOTE: If DTC U0140 is set in the IC (Instrument Cluster), other observable symptoms may also be present such as Tire Pressure Monitoring System (TPMS) warning indicator, backlighting and door ajar indication.

This pinpoint test is intended to diagnose the following:

- SJB (Smart Junction Box)

- IC (Instrument Cluster)

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

X1 CHECK THE HIGH BEAM HEADLAMPS OPERATION

- Turn the headlamps to the HIGH BEAM position. Observe the high beam headlamps.

Do the high beam headlamps operate correctly?

Yes
GO to X2.

No
REFER to Lighting and Horns.

X2 CARRY OUT THE IC (Instrument Cluster) INDICATOR LAMP CONTROL ACTIVE COMMAND USING THE SCAN TOOL

- Ignition ON.

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

- Select the IC (Instrument 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 X3.

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

X3 RETRIEVE THE RECORDED DTCs FROM THE IC (Instrument Cluster) SELF-TEST

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

Are any DTCs recorded?

Yes
For DTC U0140, GO to Pinpoint Test BC Pinpoint Test BC: DTC U0140.

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

No
INSTALL a new Smart Junction Box (SJB). TEST the system for normal operation.