Circuit/System Testing

NOTE:

It may take up to 2 min for all vehicle systems to power down before an accurate ground or low reference circuit continuity test can be performed.

Ignition/Vehicle & All vehicle systems - Off
Disconnect the appropriate electrical connector: P19 Speaker
Ignition - On / Vehicle - In Service Mode
A11 Radio - On
Mute - Off
Test for 2 to 10 V between the test points:
- Signal circuit terminal 1 & Ground
- Signal circuit terminal 2 & Ground
- If less than 2 V
1. Ignition/Vehicle - Off
2. Disconnect the appropriate electrical connector: A11 Radio
3. Test for infinite resistance between the test points:
  - Signal circuit terminal 1 @ P19 Speaker & Ground
  - Signal circuit terminal 2 @ P19 Speaker & Ground
  - If less than infinite resistance - Repair the short to ground on the circuit.
  - Go to next step: If infinite resistance
4. Test for less than 2 Ω between the test points:
  - Signal circuit terminal 1 @ P19 Speaker & The other end of the circuit @ A11 Radio
  - Signal circuit terminal 2 @ P19 Speaker & The other end of the circuit @ A11 Radio
  - If 2 Ω or greater - Repair the open/high resistance in the circuit.
  - If less than 2 Ω - Replace the component: A11 Radio
- If greater than 10 V
1. Ignition/Vehicle - Off
2. Disconnect the appropriate electrical connector: A11 Radio
3. Ignition - On / Vehicle - In Service Mode
4. Test for less than 1 V between the test points:
  - Signal circuit terminal 1 @ P19 Speaker & Ground
  - Signal circuit terminal 2 @ P19 Speaker & Ground
  - If 1 V or greater - Repair the short to voltage on the circuit.
  - If less than 1 V - Replace the component: A11 Radio
- Go to next step: If between 2 and 10 V
Test or replace the component: P19 Speaker