Circuit/System Testing

Ignition OFF, disconnect the harness connector at the appropriate P19 Speaker. Ignition On/Vehicle in Service Mode. Infotainment system ON, mute OFF.
Test for 5-7 V between the appropriate signal circuit terminals listed below and ground.
- door and I/P speakers audio (-) circuit terminal 1
- door and I/P speakers audio (+) circuit terminal 2
- subwoofer audio (-) circuit terminal A
- subwoofer audio (+) circuit terminal B
- If less than 5 V
1. Ignition OFF, disconnect the X1 and X2 harness connectors at the T3 Audio Amplifier.
2. Test for infinite resistance between the signal 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 signal circuit end to end.
  - If 2 Ω or greater, repair the open/high resistance in the circuit.
  - If less than 2 Ω, replace the T3 Audio Amplifier.
- If greater than 7 V
1. Ignition OFF, disconnect the X1 and X2 harness connectors at the T3 Audio Amplifier. Ignition On/Vehicle in Service Mode.
2. Test for less than 1 V between the signal circuit and ground.
  - If 1 V or greater, repair the short to voltage on the circuit.
  - If less than 1 V, replace the T3 Audio Amplifier.
- If 5-7 V
Test or replace the P19 Speaker.