Pinpoint Test J: The Safety Belt Warning Indicator Is Never/Always On
Normal Operation
The safety belt warning indicator informs the driver that the driver or passenger safety belt is unbuckled. The first 70 seconds after the ignition switch transitions from OFF or ACC to RUN or START, the safety belt warning indicator and the associated chime are used as a reminder to the driver that the front row safety belts are not buckled. In this first 70 seconds, the indicator illuminates when the driver and/or front passenger safety belt is unbuckled (with the seat occupied) and turns off whenever the safety belt(s) in the occupied front row seat(s) is buckled. The indicator illuminates again if a safety belt is unbuckled after both are buckled and the 70 seconds has not yet expired. The safety belt switch is hardwired to the restraints control module (RCM). The instrument cluster (IC) receives the safety belt switch status from the RCM over the high speed controller area network (HS-CAN) communication bus. The RCM signals the instrument cluster (IC), when the safety belt is unfastened, to illuminate the safety belt warning indicator. If the safety belt status message is missing for less than 5 seconds, the safety belt warning remains in the last indication mode (on or off). If the safety belt status message is missing for more than 5 seconds, the instrument cluster (IC) sets DTC U0151 and defaults the safety belt warning indicator off.
This pinpoint test is intended to diagnose the following:
- RCM
- Instrument cluster (IC)
PINPOINT TEST J: THE SAFETY BELT WARNING INDICATOR IS NEVER/ALWAYS ON
- J1 RETRIEVE THE RECORDED RCM DTCs FROM BOTH CONTINUOUS AND ON-DEMAND SELF-TESTS
- Check for recorded RCM DTCs from the continuous and on-demand self-tests.
- Are any RCM DTCs recorded?
- YES : REFER to SUPPLEMENTAL RESTRAINT SYSTEM article.
- NO : Go to J2.
- J2 RETRIEVE THE RECORDED DTCs FROM BOTH THE CONTINUOUS AND ON-DEMAND INSTRUMENT CLUSTER (IC) SELF-TESTS
- Check for recorded instrument cluster (IC) DTCs from the continuous and on-demand self-tests.
- Are any DTCs recorded?
- YES
: For DTC B1318, go to Pinpoint Test AD
.
For DTC U0151, go to Pinpoint Test AJ .
For all other DTCs, REFER to appropriate DTC Chart in this service information.
- NO : Go to J3.
- J3 CARRY OUT THE INSTRUMENT CLUSTER (IC) INDICATOR LAMP CONTROL ACTIVE COMMAND USING THE SCAN TOOL
- Key in ON position.
- Enter the following diagnostic mode on the diagnostic tool: Instrument Cluster (IC) DataLogger
- Select the instrument cluster (IC) safety belt warning indicator (SBLT_LAMP) active command and 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?
- J4 CHECK FOR CORRECT RCM OPERATION
- Disconnect all the RCM connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the RCM connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
- YES : INSTALL a new RCM. REFER to SUPPLEMENTAL RESTRAINT SYSTEM article. TEST the system for normal operation.
- NO : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
- J5 CHECK FOR CORRECT INSTRUMENT CLUSTER (IC) OPERATION
- Disconnect the instrument cluster (IC) connector.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect the instrument cluster (IC) connector and make sure it seats correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
- YES : INSTALL a new instrument cluster (IC). REFER to Instrument Cluster (IC) . TEST the system for normal operation.
- NO : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.