Circuit/System Testing

NOTE:

Perform the Circuit/System Verification before proceeding with Circuit/System Testing.

Ignition OFF, disconnect the X2 harness connector at the P17 Info Display Module.
Test for less than 20 Ω between the data shield circuit terminal 6 and ground.
- If 20 Ω or greater
1. Ignition OFF, disconnect the X1 connector at the A11 Radio.
2. Test for less than 2 Ω in the data shield circuit end to end.
  - If 2 Ω or greater, repair the open/high resistance in the circuit.
  - If less than 2 Ω, replace the A11 Radio.
- If less than 20 Ω
Ignition ON.
Test for 2 - 3 V between the serial data circuit terminals listed below and ground.
- terminal 1
- terminal 2
- If less than 2 V
1. Ignition OFF, disconnect the X1 harness connector at the A11 Radio.
2. Test for infinite resistance between the serial data 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 serial data circuit end to end.
  - If 2 Ω or greater, repair the open/high resistance in the circuit.
  - If less than 2 Ω, replace the A11 Radio.
- If greater than 3 V
1. Ignition OFF, disconnect the X1 harness connector at the A11 Radio. Ignition ON.
2. Test for less than 1 V between the serial data circuit and ground.
  - If 1 V or greater, repair the short to voltage on the circuit.
  - If less than 1 V, replace the A11 Radio.
- If between 2 - 3 V
Replace the P17 Info Display Module. Connect all harness connectors.
Ignition ON, radio ON.
Verify that all radio controls operate and perform the correct function.
- If the radio controls still malfunction.
  Replace the A11 Radio.
- If all radio controls operate and perform the correct function.
All OK