Circuit/System Testing

Passenger Seat Belt Switch Malfunction

1. Ignition OFF. Disconnect the harness connector at the B153P Seat Belt Buckle-Passenger.
2. Test for less than 5 Ω between the low reference circuit terminal 2 and ground.
   • If 5 Ω or greater 
   1. Disconnect the X2 harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module.
   2. Test for less than 2 Ω in each control circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the K36 Inflatable Restraint Sensing and Diagnostic Module.
      • If less than 5 Ω 
3. Ignition ON.
4. Verify the scan tool Passenger Seat Belt Status parameter listed below is Buckled.
   • If not Buckled 
   1. Disconnect the X2 harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module.
   2. Test for infinite resistance between the seat belt switch signal circuit terminal 1 and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If less than 2 Ω, replace the K36 Inflatable Restraint Sensing and Diagnostic Module.
   • If Buckled 
5. Install a 3 A fused jumper wire between the signal circuit terminal 1 and the low reference circuit terminal 2.
6. Verify the scan tool Passenger Seat Belt Status parameter is Unbuckled.
   • If not Unbuckled 
   1. Ignition OFF. Disconnect the X2 harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module. Ignition ON.
   2. Test for less than 1 V between the signal circuit and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
   3. Test for less than 2 Ω in each circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the K36 Inflatable Restraint Sensing and Diagnostic Module.
   • If Unbuckled 
7. Test or replace the B153P Seat Belt Buckle-Passenger.

Passenger Seat Belt Indicator Malfunction

1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the P14 Passenger Air Bag Disable Indicator.
2. Test for less than 10 Ω between the ground circuit terminal 4 and ground.
   • If 10 Ω or greater 
   1. Ignition OFF.
   2. Test for less than 2 Ω in the ground circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, repair the open/high resistance in the ground connection.
   • If less than 10 Ω 
3. Ignition ON. With a scan tool, command the Passenger Seat Belt Reminder Indicator OFF.
4. Test for less than 11 V between the control circuit terminal 6 and ground.
   • If 11 V or greater 
   1. Ignition OFF. Disconnect the X1 harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module. Ignition ON.
   2. Test for less than 1 V between the control circuit terminal 6 and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • If less than 1 V, replace the K36 Inflatable Restraint Sensing and Diagnostic Module.
   • If less than 11 V 
5. With a scan tool, command the Passenger Seat Belt Reminder Indicator ON.
6. Test for greater than 4 V between the control circuit terminal 6 and ground.
   • If 4 V or less 
   1. Ignition OFF. Disconnect the X 1 harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module.
   2. Test for infinite resistance between the control circuit terminal 6 and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
   3. Test for less than 2 Ω between the control circuit terminal 6 and ground.
      • If 2 Ω or greater repair the open/high resistance in the circuit.
      • If less than 2 Ω replace the K36 Inflatable Restraint Sensing and Diagnostic Module.
   • If greater than 4 V 
7. Replace the P14 Passenger Air Bag Disable Indicator.