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• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
• | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
• | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
---|---|---|---|---|
Passenger Seat Belt Switch Signal | 1 | 2 | 2 | -- |
Seat Belt Indicator Control | 1 | 2 | 2 | -- |
Passenger Seat Belt Switch Ground | - | 2 | -- | -- |
1. Seat Belt Indicator Always Illuminated 2. Seat Belt Indicator Inoperative |
The passenger seat belt switch supplies a ground to the SDM when the seat belt is buckled. When a seat belt is unbuckled, a switch opens removing the ground to the SDM. The SDM will then supply voltage to the seat belt indicator which will then cause that indicator to illuminate.
Seat Belt System Description and Operation
Control Module References for scan tool information
⇒ | If the scan tool does not indicate Occupied, test the seat belt reminder sensor signal circuit and the low reference circuit for an open or short. If the circuits test normal, replace the seat belt reminder sensor. Refer to Driver or Passenger Seat Cushion Pad Replacement . |
⇒ | If the values do not change, refer to Seat Belt Switch Malfunction. |
⇒ | If the indicator is always ON or always OFF, refer to Seat Belt Indicator Malfunction. |
⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. If the circuit tests normal, replace the K36 SDM. |
⇒ | If not the specified value, test the signal circuit terminal 2 for a short to ground. If the circuit tests normal, replace the K36 SDM. |
⇒ | If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K36 SDM |
⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
⇒ | If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K36 SDM. |
⇒ | If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K36 SDM. |
⇒ | If not the specified value, replace the B88 passenger seat belt switch. |
⇒ | If greater than the specified range, replace the B88 passenger seat belt switch. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for the SDM and DIC replacement, setup, and programming |
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