*NO RESPONSE FROM CD CHANGER

For a complete wiring diagram Refer to Section 8W.

Possible Causes

(Z515) GROUND CIRCUIT OPEN

(X160) FUSED B(+) CIRCUIT OPEN

(X112) IGNITION RUN/ACC SIGNAL CIRCUIT OPEN

(D25) PCI BUS CIRCUIT OPEN

RADIO

CD CHANGER

Diagnostic Test

1. ESTABLISH COMMUNICATION WITH RADIO ON PCI BUS

Turn the ignition on.

NOTE: Ensure the IOD fuse is installed and battery voltage is between 10.0 and 16.0 volts.

With the scan tool, select ECU view.

NOTE: A red X will be next to the module that is not communicating, indicating that the module is not active on the Bus network. A green check indicates that the module is active on the Bus network.

Does the scan tool communicate with the radio?

Yes

Go To 2

Perform the appropriate no response test. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING)

2. (Z515) GROUND CIRCUIT OPEN

Turn the ignition off.
Disconnect the CD Changer harness connector.
Using a 12-volt test light connected to 12-volts, probe the (Z515) ground circuit.

Does the test light illuminate brightly?

Yes

Go To 3

Repair the (Z515) Ground circuit for an open.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).

3. (X160) FUSED B(+) CIRCUIT OPEN

Using a 12-volt test light connected to ground, probe the (X160) Fused B(+) circuit.

Does the test light illuminate brightly?

Yes

Go To 4

Repair the (X160) Fused B(+) circuit for an open.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).

4. (X112) IGNITION RUN/ACC SIGNAL CIRCUIT OPEN

Turn the ignition on.
Using a 12-volt test light connected to ground, probe the (X112) Ignition Run/Acc Signal circuit.

Does the test light illuminate brightly?

Yes

Go To 5

Repair the (X112) Ignition Run/Acc Signal circuit for an open.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).

5. (D25) PCI BUS CIRCUIT OPEN

Turn the ignition off.
Measure the resistance of the (D25) PCI Bus circuit between the Radio C2 harness connector and the CD Changer connector.

Is the resistance below 5.0 ohms?

Yes

Replace the CD Changer in accordance with the service information.

Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).

Repair the (D25) PCI Bus circuit for an open.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).