Circuit/System Testing

WARNING: This page is about a different car, the 2018 Chevrolet Cruze. However, it is still accessible from the selected car via links, so may be relevant.

Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the B87 Rearview Camera. It may take up to 2 min for all vehicle systems to power down.
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.
- Go to next step: If less than 10 Ω
Ignition ON.
Verify a test lamp illuminates between the ignition circuit terminal 6 and ground.
- If the test lamp does not illuminate and the circuit fuse is good
1. Ignition OFF.
2. Test for less than 2 Ω in the ignition circuit end to end.
  - If 2 Ω or greater, repair the open/high resistance in the circuit.
  - If less than 2 Ω, verify the fuse is good and there is voltage at the fuse. Refer to Power Mode Mismatch (Without ATH/BTM)Power Mode Mismatch (With ATH/BTM) .
- If the test lamp does not illuminate and the circuit fuse is open
1. Ignition OFF.
2. Test for infinite resistance between the ignition circuit and ground.
  - If less than infinite resistance, repair the short to ground on the circuit.
  - If infinite resistance, replace the B87 Rearview Camera.
- Go to next step: If the test lamp illuminates
Engine running, trunk/liftgate closed, park brake applied, transmission in R.
Verify a test lamp illuminates between the control circuit terminal 3 and ground.
- If the test lamp does not illuminate
1. Ignition OFF.
2. Test for infinite resistance between the ignition 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 ignition circuit end to end.
  - If 2 Ω or greater, repair the open/high resistance in the circuit.
  - If less than 2 Ω, refer to Backup Lamps Malfunction (Manual Transmission)Backup Lamps Malfunction (Automatic Transmission) .
- Go to next step: If the test lamp illuminates
Ignition OFF, disconnect the X1 harness connector at the A11 Radio, ignition ON.
Test for less than 1 V between the signal circuit terminal listed below and ground:
- B87 Rearview Camera signal (+) circuit terminal 1
- B87 Rearview Camera signal (-) circuit terminal 4
- If 1 V or greater
  Repair the short to voltage on the circuit.
- Go to next step: If less than 1 V
Ignition OFF.
Test for infinite resistance between the signal circuit terminal listed below and ground:
- B87 Rearview Camera signal (+) circuit terminal 1
- B87 Rearview Camera signal (-) circuit terminal 4
- If less than infinite resistance
  Repair the short to ground on the circuit.
- Go to next step: If infinite resistance
Test for less than 1 Ω between the B87 Rearview Camera signal (+) circuit terminal 1 and the other end of the circuit.
- If 1 Ω or greater
  Repair the open/high resistance in the circuit.
- Go to next step: If less than 1 Ω
Test for less than 1 Ω between the B87 Rearview Camera signal (+) circuit terminal 4 and the other end of the circuit.
- If 1 Ω or greater
  Repair the open/high resistance in the circuit.
- Go to next step: If less than 1 Ω
Replace the B87 Rearview Camera.
Engine running, trunk/liftgate closed, park brake applied, transmission in R.
Verify a clear rear vision image is displayed on the P17 Info Display Module.
- If a clear rear vision image is not displayed
  Replace the A11 Radio.
- Go to next step: If a clear rear vision image is displayed
All OK.