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

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)

J1:

J2-J5: