Pinpoint Test T: The Air Bag Warning Indicator Is Never/Always On

Instrumentation, Message Center and Warning Chimes

Pinpoint Tests

Pinpoint Test T: The Air Bag Warning Indicator Is Never/Always On

Normal Operation

The Instrument Cluster (IC) receives the Supplemental Restraint System (SRS) status from the Restraints Control Module (RCM) over the High Speed Controller Area Network (HS-CAN) communication bus. If a SRS concern is detected, the RCM sets a DTC and sends a message to the IC to turn on the air bag warning indicator. If the SRS status message is missing for more than 5 seconds, the IC sets DTC U0151 and defaults the air bag warning indicator on. If the SRS status message is deemed invalid for more than 5 seconds, the IC sets DTC U2023 and defaults the air bag warning indicator on.

This pinpoint test is intended to diagnose the following:

- RCM
- IC



PINPOINT TEST T: THE AIR BAG WARNING INDICATOR IS NEVER/ALWAYS ON

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T1 CARRY OUT THE IC AIR BAG WARNING INDICATOR ACTIVE COMMAND USING THE SCAN TOOL


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

Yes
GO to T2.

No
INSTALL a new IC. REFER to Instrument Cluster (IC) Instrument Cluster (IC). TEST the system for normal operation.

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T2 RETRIEVE THE RECORDED DTCs FROM BOTH THE CONTINUOUS AND ON-DEMAND RCM SELF-TESTS


- Check for recorded RCM DTCs from the continuous and on-demand self-tests.
- Are any DTCs recorded?

Yes
REFER to Air Bag Systems.

No
GO to T3.

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T3 RETRIEVE THE RECORDED DTCs FROM BOTH THE CONTINUOUS AND ON-DEMAND IC SELF-TESTS


- Check for recorded IC DTCs from the continuous and on-demand self-tests.
- Are any DTCs recorded?

Yes
For DTC U0151, Go To Pinpoint Test AI. Pinpoint Tests AI: DTC U0151

For all other DTCs, REFER to the IC DTC Chart. Instrumentation, Message Center and Warning Chimes

No
INSTALL a new RCM. TEST the system for normal operation.

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