Circuit Description
The radio and remote compact disc (CD) player communicate through the serial data E&C circuit.
Conditions for Running the DTC
This test is run when the radio switches from OFF to ON.
Conditions for Setting the DTC
The radio shall set a current status for this DTC when it detects a loss of E&C communications with the CD changer.
Action Taken When the DTC Sets
The radio will ignore the CD changer when this DTC is current. The CD changer will not operate.
Conditions for Clearing the DTC
This DTC is cleared when the ignition cycles from the OFF to the ON position.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
Schematic Reference: Radio/Audio System Schematics | ||||
1 | Did you perform the Radio/Audio System Diagnostic System Check? | -- | Go to Step 2 | |
2 |
Does the remote CD changer operate? | -- | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
3 |
Did you find and correct the condition? | -- | Go to Step 11 | Go to Step 4 |
4 | Test the ground circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 11 | Go to Step 5 |
5 | Measure the voltage from the E & C serial data circuit to a good ground. Does the voltage measure near the specified value? | 12 V | Go to Step 8 | Go to Step 6 |
6 | Test the E & C serial data circuit for a short, high resistance or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 11 | Go to Step 7 |
7 | Inspect for poor connections at the harness connector of the radio. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 11 | Go to Step 9 |
8 | Inspect for poor connections at the harness connector of the remote CD changer. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 11 | Go to Step 10 |
9 | Replace the radio. Refer to Radio Replacement . Did you complete the replacement? | -- | Go to Step 11 | -- |
10 | Replace the remote CD changer. Refer to Remote CD Changer Replacement . Did you complete the replacement? | -- | Go to Step 11 | -- |
11 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 2 |
