Circuit/System Testing

NOTE:

Some circuits supply audio signals to more than one speaker. It may be necessary to disconnect all speakers on the affected audio circuit when performing circuit tests.

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