For 1990-2009 cars

### Circuit Description

Each time the ignition cycles from OFF to ON, the radio receives VIN data over the class 2 communication circuit. If the VIN data in the radio memory matches the VIN data it receives over the class 2 communication circuit, the radio will operate normally.

### Conditions for Running the DTC

• | The DTC is run when the radio is turned from OFF to ON.

• | Battery voltage is between 9 and 16 volts.

### Conditions for Setting the DTC

Installing a radio from a different vehicle platform or installing a new Powertrain Control Module (PCM) and not entering the correct setup information with the scan tool.

### Action Taken When the DTC Sets

The radio does not function. The radio displays "CAL".

### Conditions for Clearing the DTC

• | Installing a radio from another vehicle of the same platform or a new radio of the same platform.

• | Installing a new PCM setup properly with the correct VIN for that vehicle.

The DTC status will turn to history when the above criteria is met. The scan tool can now clear the history DTC or it will automatically clear after 100 consecutive fault free ignition cycles.

### Test Description

The number(s) below refer to the step number(s) on the diagnostic table.

1. Clear all DTCs and cycle the ignition to check that the DTC did not fasely set.

2. Clear all DTCs after the repair procedure is complete.

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Did you perform the Radio/Audio System Diagnostic System Check? | -- | Go to Step 2 | Go to Diagnostic System Check - Radio/Audio System
2 |

1. Install a scan tool.
2. Turn ON the ignition, with the engine OFF
3. With a scan tool, configure the Radio to the vehicle.

Does the DTC reset?

--

Go to Step 3

System OK

3 | Replace the Radio and perform the set up procedure for the Radio. Refer to Radio Replacement Did you complete the replacement? | -- | System OK | --