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

Instrumentation, Message Center and Warning Chimes

Pinpoint Test Z: 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 Panel Cluster (IPC) from the Smart Junction Box (SJB) over the Medium Speed Controller Area Network (MS-CAN) communication bus. Upon receipt of the LH/RH turn message, the IPC (Instrument Panel Cluster) flashes the LH or RH turn signal indicator on and off.

This pinpoint test is intended to diagnose the following:

- Turn signal concern

- SJB (Smart Junction Box)

- IPC (Instrument Panel Cluster)

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

Z4 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 Z2.

No
REFER to Lighting and Horns.

Z2 CARRY OUT THE IPC (Instrument Panel Cluster) INDICATOR LAMP CONTROL ACTIVE COMMAND USING THE SCAN TOOL

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

- Select the IPC (Instrument Panel 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 while observing 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 Z3.

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

Z3 RETRIEVE THE RECORDED DTCs FROM THE IPC (Instrument Panel Cluster) SELF-TEST

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

Are any DTCs recorded?

Yes
For DTC U0140:87, GO to Pinpoint Test AT Pinpoint Test AT: DTC U0140:87.

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.