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

Instrumentation, Message Center and Warning Chimes

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

Normal Operation

The Restraints Control Module (RCM) monitors the safety belt position. The RCM provides the safety belt status to the Instrument Panel Cluster (IPC) over the High Speed Controller Area Network (HS-CAN) communication bus.

If the safety belt status is missing or invalid for less than 5 seconds, the IPC defaults the safety belt warning indicator to the last state (on or off) based upon the last known good message received. If the IPC does not receive the safety belt buckle switch status from the RCM for more than 5 seconds, the IPC sets DTC U0151:00 and defaults the safety belt warning indicator off. If the RCM message is deemed invalid by the IPC for more than 5 seconds, the IPC sets defaults the safety belt warning indicator off.

This pinpoint test is intended to diagnose the following:

- RCM
- IPC

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

-------------------------------------------------
Z1 RETRIEVE THE RECORDED RCM DTCs FROM THE SELF-TEST

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

Yes
REFER to Supplemental Restraint System Testing and Inspection.

No
GO to Z2.

-------------------------------------------------
Z2 RETRIEVE THE RECORDED DTCs FROM THE IPC SELF-TEST

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

Yes
For DTC U0151:00, GO to Pinpoint Test AR. For all other DTCs, REFER to DTC Charts. Pinpoint Tests AR: DTC U0151:00

No
GO to Z3.

-------------------------------------------------
Z3 CARRY OUT THE IPC INDICATOR LAMP CONTROL ACTIVE COMMAND USING THE SCAN TOOL

- Ignition ON.
- Enter the following diagnostic mode on the scan tool: IPC DataLogger.
- Select the IPC all warning indicators (SBLT_LAMP) active command. Command all the warning indicators 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
If the safety belt warning indicator is never on, the system is operating correctly at this time. If the safety belt warning indicator is always on, INSTALL a new RCM. REFER to Supplemental Restraint System Service and Repair. TEST the system for normal operation.

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

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