Circuit/System Testing

WARNING: This page is about a different car, the 2019 Chevrolet Traverse. However, it is still accessible from the selected car via links, so may be relevant.

Ignition OFF and all vehicle systems OFF, disconnect the inline harness connector for the appropriate A9 Outside Rearview Mirror. It may take up to 2 min for all vehicle systems to power down.
- X510 - Driver Door Harness to Outside Rearview Mirror
- X610 - Passenger Door Harness to Outside Rearview Mirror
Test for less than 10 Ω between the ground circuit terminal 5 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
Ignition ON.
Test for 2 - 4 V between the control circuit terminal 15 and the ground circuit terminal 5 when commanding the Object Detection Alert Indicators On with a scan tool.
- If less than 2 V
1. Ignition OFF, disconnect the harness connector at the appropriate B218 Side Object Sensor Module.
2. Test for infinite resistance between the control circuit and ground.
  - If less than infinite resistance, repair the short to ground on the circuit.
  - Go to next step: If infinite resistance
3. Test for less than 2 Ω in the 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 B218 Side Object Sensor Module.
- If greater than 4 V
1. Ignition OFF, disconnect the harness connector at the B218 Side Object Sensor Module, ignition ON.
2. Test for less than 1 V between the control circuit and ground.
  - If 1 V or greater, repair the short to voltage on the circuit.
  - If less than 1 V, replace the B218 Side Object Sensor Module.
- Go to next step: If between 2 - 4 V
Test or replace the A9 Outside Rearview Mirror Glass.