Circuit/System Testing

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

NOTE:

To prevent an incorrect diagnosis, the door chime must be inactive.

Make sure the driver door is closed (or the driver door latch is latched) when performing the diagnostic procedure.

Ignition/Vehicle & All vehicle systems - Off - Disconnect the electrical connector: X3 @ T3 Audio Amplifier
Ignition - On/Vehicle - In Service Mode - A11 Radio - ON - Mute On
Test for 7.5 to 8.5 V between the test points: Terminal 11 & Ground
- If greater than 8.5 V
1. Ignition/Vehicle & All vehicle systems - Off - Disconnect the electrical connector: X2 @ A11 Radio
2. Ignition - On/Vehicle - In Service Mode Test for less than 1 V between the test points: Terminal 2 & Ground
  - If greater than 1 V - Repair the short to voltage on the circuit.
  - If less than 1 V - Replace the component: A11 Radio
- If less than 7.5 V
1. Ignition/Vehicle & All vehicle systems - Off - Disconnect the electrical connector: X2 @ A11 Radio
2. Test for infinite resistance between the test points: Terminal 2 & 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 ohms between the test points: Terminal 2 & The other end of the circuit
  - If 2 ohms or greater - Repair the open/high resistance in the circuit.
  - If less than 2 ohms - Replace the component: A11 Radio
- Go to next step: If between 7.5 and 8.5 V
A11 Radio - ON - Mute Off
Test for less than 1 V between the test points: Terminal 11 & Ground
- If greater than 1 V
  Replace the component: A11 Radio
- Go to next step: If less than 1 V
Replace the component: T3 Audio Amplifier