Pinpoint Test L: The Safety Belt Warning Indicator Is Never/Always On

Instrumentation, Message Center and Warning Chimes

Pinpoint Tests

Pinpoint Test L: The Safety Belt Warning Indicator Is Never/Always On

Normal Operation

The safety belt switch is hardwired to the Restraints Control Module (RCM). The RCM monitors the safety belt position through the safety belt buckle switch and communicates the safety belt status to the Instrument Cluster (IC) over the High Speed Controller Area Network (HS-CAN). When the safety belt is buckled, the RCM receives a ground signal and sends a message to the IC to turn off the safety belt warning indicator. When the safety belt is unbuckled, the ground to the RCM is removed and the RCM sends a message to the IC to illuminate the safety belt warning indicator.

This pinpoint test is intended to diagnose the following:

- RCM
- IC



PINPOINT TEST L: THE SAFETY BELT WARNING INDICATOR IS NEVER/ALWAYS ON

-------------------------------------------------
L1 RETRIEVE THE RECORDED DTCs FROM THE RCM SELF-TEST


- Retrieve the recorded RCM DTCs from the self-test.
- Are any RCM DTCs recorded?

Yes
REFER to Restraint Systems.

No
GO to L2.

-------------------------------------------------
L2 RETRIEVE THE RECORDED DTCs FROM THE IC SELF-TEST


- Check for recorded IC DTCs from the self-test.
- Are any DTCs recorded?

Yes
For DTC U1900, REFER to Information Bus.

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

No
GO to L3.

-------------------------------------------------
L3 CARRY OUT THE IC INDICATOR LAMP ACTIVE COMMAND USING THE SCAN TOOL


- Ignition ON.
- Enter the following diagnostic mode on the scan tool: IC DataLogger.
- Select the IC safety belt warning indicator (SBLT_LMP) active command. Command the safety belt warning indicator on and off. Observe the safety belt warning indicator.
- Does the safety belt warning indicator illuminate when commanded on, and turn off when commanded off?

Yes
INSTALL a new RCM. REFER to Restraint 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.

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