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.

B88D seat belt switch-driver
Seat belt switch harness connector
K36 inflatable restraint sensing and diagnostic module
SDM wiring harness connector

Ignition OFF. Disconnect the harness connector at the B88D seat belt switch-driver.
Test for less than 5 Ω between the low reference circuit terminal B 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
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. Ignition OFF. 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 A 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 the scan tool Driver Seat Belt Status parameter does display Buckled
Install a 3 A fused jumper wire between the signal circuit terminal A and the low reference circuit terminal B.
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. 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 the scan tool Driver Seat Belt Status parameter does display Unbuckled
Test or replace the B88D seat belt switch-driver.