Pinpoint Test X: The Air Bag Warning Indicator Is Never/Always On
Instrumentation and Warning Chimes
Pinpoint Test
Pinpoint Test X: 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. The IC illuminates the air bag warning indicator upon receipt of a message from the RCM.
- DTC U0151 (Lost Communication With The Restraints Control Module [RCM]) - a continuous DTC that sets in the IC if a missing message from the RCM occurs and the IC defaults the air bag warning indicator on.
This pinpoint test is intended to diagnose the following:
- RCM
- IC
PINPOINT TEST X: THE AIR BAG WARNING INDICATOR IS NEVER/ALWAYS ON
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X1 RETRIEVE THE RECORDED DTCs FROM THE IC SELF-TEST
- Retrieve the recorded DTCs from the IC self-test.
- Is DTC U0151 retrieved?
Yes
GO to Pinpoint Test AO. Pinpoint Tests AO: DTC U0151
No
GO to X2.
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X2 RETRIEVE THE RECORDED DTCs FROM THE RCM SELF-TEST
- Retrieve the recorded DTCs from the RCM self-test.
- Are any DTCs recorded?
Yes
REFER to Restraint Systems.
No
GO to X3.
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X3 CARRY OUT THE IC RESTRAINTS OUTPUT CONTROL 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 (RESTRAINT) active command. Command the air bag warning indicator on then off again. Observe the air bag warning indicator.
- Does the air bag 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.
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