Circuit/System Testing

WARNING: This page is about a different car, the 2014 Chevrolet Sonic. 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. 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.
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 OK and there is voltage at the fuse. Refer to Power Mode Mismatch
- 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.
- If the test lamp illuminates
Engine running, park brake applied, transmission in REVERSE.
Verify a test lamp illuminates between the control circuit terminal 3 and ground.
- If the test lamp does not illuminate
1. Ignition OFF, disconnect the X7 harness connector at the K9 Body Control Module and remove both E5 Backup Lamps.
2. Test for infinite resistance between the control circuit and ground.
  - If less than infinite resistance, repair the short to ground on the circuit.
  - 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 K9 Body Control Module.
- If the test lamp illuminates
Ignition OFF, disconnect the X4 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.
- If less than 1 V
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.
- If infinite resistance
Test for less than 2 Ω between the B87 Rearview Camera signal circuit terminal 1 and the A11 Radio signal circuit terminal 7 X1
- If 2 Ω or greater
  Repair the open/high resistance in the signal circuit.
- If less than 2 Ω
Test for less than 2 Ω between the B87 Rearview Camera signal circuit terminal 4 and the A11 Radio signal circuit terminal 8 X1
- If 2 Ω or greater
  Repair the open/high resistance in the signal circuit.
- If less than 2 Ω
Replace the B87 Rearview Camera
Engine running, transmission in REVERSE.
Verify a clear image is displayed on the A11 Radio.
- If a clear image is not displayed
  Refer to A11 Radio X1 .
- If a clear image displayed
All Ok.