Pinpoint Test Z: The LH/RH Turn Indicator Is Never/Always On
Instrumentation, Message Center and Warning Chimes
Pinpoint Tests
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 flashes the LH or RH turn signal indicator on and off.
This pinpoint test is intended to diagnose the following:
- Turn signal concern
- SJB
- IPC
PINPOINT TEST Z: THE LH/RH TURN INDICATOR IS NEVER/ALWAYS ON
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Z1 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 Exterior Lighting Testing and Inspection.
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Z2 CARRY OUT THE IPC INDICATOR LAMP CONTROL ACTIVE COMMAND USING THE SCAN TOOL
- Enter the following diagnostic mode on the scan tool: IPC DataLogger.
- Select the IPC 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. REFER to Instrument Panel Cluster (IPC) Service and Repair. TEST the system for normal operation.
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Z3 RETRIEVE THE RECORDED DTCs FROM THE IPC SELF-TEST
- Check for recorded DTCs from the IPC 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. REFER to Multifunction Electronic Modules Service and Repair. TEST the system for normal operation.
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