Circuit/System Testing

Ignition/Vehicle & All vehicle systems» Off
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.
Disconnect the electrical connector: P19B Speaker - Center Instrument Panel
Test for less than 10 Ω between the test points: Ground circuit terminal 10 @ Component harness & Ground
- If 10 Ω or greater
1. Disconnect the ground connection: G202
2. Test for less than 2 Ω between the test points: Ground circuit terminal 10 @ Component harness & Ground
  - 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
Verify a test lamp turns On between the test points: B+ circuit terminal 5 & Ground
- If the test lamp does not turn On and the circuit fuse is OK
1. Remove» Test Lamp
2. Test for less than 2 Ω between the test points: B+ circuit terminal 5 & F30DA Fuse
  - 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.
- If the test lamp does not turn On and the circuit fuse is open
1. Remove» Test Lamp
2. Test for infinite resistance between the test points: B+ circuit terminal 5 & Ground
  - If less than infinite resistance» Repair the short to ground on the circuit.
  - If infinite resistance» Replace the component: P19B Speaker- Center Instrument Panel.
- If the test lamp turns On
Ignition/Vehicle» Off & Remove» Test lamp
Disconnect the electrical connector: T3 Audio Amplifier
Ignition On/Vehicle in Service Mode.
Test for less than 1 V between the test points:
- Signal circuit terminal 3 @ Component harness & Ground
- Signal circuit terminal 4 @ Component harness & Ground
- Signal circuit terminal 7 @ Component harness & Ground
- Signal circuit terminal 8 @ Component harness & Ground
- Signal circuit terminal 9 @ Component harness & Ground
- If 1 V or greater» Repair the short to voltage on the circuit.
- If less than 1 V
1. Test for infinite resistance between the test points:
  - Signal circuit terminal 3 & Ground
  - Signal circuit terminal 4 & Ground
  - Signal circuit terminal 7 & Ground
  - Signal circuit terminal 8 & Ground
  - Signal circuit terminal 9 & Ground
  - If less than infinite resistance» Repair the short to ground on the circuit.
  - If infinite resistance
2. Test for less than 2 Ω between the test points:
  - Signal circuit terminal 3 @ Component harness & Terminal 13 @ Control module harness
  - Signal circuit terminal 4 @ Component harness & Terminal 12 @ Control module harness
  - Signal circuit terminal 7 @ Component harness & Terminal 11 @ Control module harness
  - Signal circuit terminal 8 @ Component harness & Terminal 15 @ Control module harness
  - Signal circuit terminal 9 @ Component harness & Terminal 14 @ Control module harness
  - If 2 Ω or greater» Repair the open/high resistance in the circuit.
  - If less than 2 Ω Replace the component: P19B Speaker - Center Instrument Panel
Ignition» On / Vehicle» In Service Mode Radio=On
Verify the center speakers raise from dashboard.
- If speakers do not raise from dashboard
  Replace the component: T3 Audio Amplifier
- If speakers do raise from dashboard
All OK.