Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the B176 Multi-axis Acceleration Sensor Module.
- Test for less than 10 Ω between the ground circuit terminal 6 and ground.
- If greater than the specified range, test the ground circuit for an open/high resistance.
- Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal 1 and ground.
- If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance. If the circuits test normal, replace the B176 Multi-axis Acceleration Sensor Module.
- Test for less than 4.5 V between each of the serial data circuit terminals listed below and ground.
- Terminal 4
- Terminal 5
- If greater than the specified range, refer to DTC U0077 to test for a short to voltage in the serial data circuit.
- Ignition OFF, all access doors closed, all vehicle systems OFF, and all keys at least 3 m away from vehicle. It may take up to 10 min for all vehicle systems to power down.
- Disconnect the harness connector at the K17 Electronic Brake Control Module.
- Test for less than 2 Ω in each of the serial data circuits end to end:
- B176 Multi-axis Acceleration Sensor Module terminal 4 and K17 Electronic Brake Control Module terminal 5
- B176 Multi-axis Acceleration Sensor Module terminal 5 and K17 Electronic Brake Control Module terminal 6
- If greater than the specified range, test the serial data circuit for an open/high resistance between the B176 Multi-axis Acceleration Sensor Module and the K17 Electronic Brake Control Module.
- If all circuits test normal, replace the B176 Multi-axis Acceleration Sensor Module.
NOTE:
The following test step is only applicable to low speed GMLAN modules.