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

Instrumentation, Message Center and Warning Chimes

Pinpoint Tests

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

Normal Operation

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

If the safety belt buckle status message is missing or invalid for less than 5 seconds, the IPC defaults the safety belt warning indicator to its 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 message from the RCM or the message is deemed invalid by the IPC for greater than 5 seconds, the IPC sets DTC U0151:00 and defaults the safety belt warning indicator off.

This pinpoint test is intended to diagnose the following:

- Safety belt buckle concern
- RCM
- IPC

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

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U1 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 U2.

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U2 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 AZ Pinpoint Tests AZ: DTC U0151:00. For all other DTCs, REFER to DTC Charts. Instrumentation, Message Center and Warning Chimes

No
GO to U3.

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U3 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 after the bulb prove-out, 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) Instrument Panel Cluster (IPC). TEST the system for normal operation.

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