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

Instrumentation, Message Center and Warning Chimes

Pinpoint Tests

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

Normal Operation

When the multifunction switch is in the LH or RH TURN SIGNAL position, a message is sent to the Instrument Cluster (IC) from the Smart Junction Box (SJB) through the communication network, and the LH or RH turn signal indicator flashes on and off.

This pinpoint test is intended to diagnose the following:

- SJB
- IC



PINPOINT TEST Q: THE LH TURN SIGNAL INDICATOR IS NEVER/ALWAYS ON

-------------------------------------------------
Q1 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 LH or RH turn lamps operate correctly?

Yes
GO to Q2.

No
REFER to Lighting and Horns. Lighting and Horns

-------------------------------------------------
Q2 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 Q3.

-------------------------------------------------
Q3 CARRY OUT THE IC INDICATOR LAMP CONTROL ACTIVE COMMAND USING THE SCAN TOOL


- Ignition ON.
- Enter the following diagnostic mode on the scan tool: IC DataLogger.
- Select the IC LH turn indicator (L_TURN) or RH turn indicator (R_TURN) active command. Command the LH or RH 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
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.

-------------------------------------------------