Pinpoint Test Y: The LH/RH Turn Indicator Is Never/Always On

Instrumentation, Message Center and Warning Chimes

Pinpoint Test Y: The LH/RH Turn Indicator Is Never/Always On

Normal Operation

When the multifunction switch is in the LH or RH TURN position, a message is sent to the Instrument Cluster (IC) from the Smart Junction Box (SJB) over the Medium Speed Controller Area Network (MS-CAN) communication bus. The IC (Instrument Cluster) upon receipt of the LH or RH turn message, flashes the LH or RH turn signal indicator on and off.

This pinpoint test is intended to diagnose the following:

- SJB (Smart Junction Box)

- IC (Instrument Cluster)

PINPOINT TEST Y : THE LH/RH TURN INDICATOR IS NEVER/ALWAYS ON

Y1 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 lamps.

Do the turn signal lamps operate correctly?

Yes
GO to Y2.

No
REFER to Lighting and Horns.

Y2 CARRY OUT THE IC (Instrument Cluster) INDICATOR LAMP CONTROL ACTIVE COMMAND USING THE SCAN TOOL

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

- Select the IC (Instrument 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 Y3.

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

Y3 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 SJB (Smart Junction Box). TEST the system for normal operation.