Circuit/System Testing

NOTE:

When removing connectors inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected component/connector.

B88 Seat belt switch
Seat belt switch harness connector
K36 SDM
SDM wiring harness connector

Ignition OFF.
Disconnect the harness connector at the B88 seat belt switch.
Test for less than 10 between the low reference circuit terminal 1 and ground.
- If 10 or greater
1. Disconnect the harness connector at the K36 SDM.
2. Test for less than 2 in each control circuit end to end.
  - If 2 or greater, repair the open/high resistance in the circuit.
  - If less than 2, replace the K36 SDM.
  - If less than 10
Ignition ON.
Verify the scan tool Driver Seat Belt Status parameter displays Buckled.
- If the scan tool Driver Seat Belt Status parameter does not display Buckled
1. Disconnect the harness connector at the K36 SDM.
2. Test for infinite resistance between the seat belt switch signal circuit terminal 2 and ground.
  - If less than infinite resistance, repair the short to ground on the circuit.
  - If less than 2, replace the K36 SDM.
- If the scan tool Driver Seat Belt Status parameter does display Buckled
Install a 3A fused jumper wire between the signal circuit terminal 2 and the low reference circuit terminal 1.
Verify the scan tool Driver Seat Belt Status parameter displays Unbuckled.
- If the scan tool Driver Seat Belt Status parameter does not display Unbuckled
1. Disconnect the harness connector at the K36 SDM.
2. Ignition ON.
3. Test for less than 1V between the signal circuit and ground.
  - If 1V or greater, repair the short to voltage on the circuit.
4. Test for less than 2 in each circuit end to end.
  - If 2 or greater, repair the open/high resistance in the circuit.
  - If less than 2, replace the K36 SDM.
- If the scan tool Driver Seat Belt Status parameter does display Unbuckled
Replace the B88 seat belt switch.