For 1990-2009 cars

### Diagnostic Instructions

• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

• | Review Strategy Based Diagnosis for an overview of the diagnostic approach.

• | Diagnostic Procedure Instructions provides an overview of each diagnostic category.

### DTC Descriptor

DTC B3077 00: Wrong Transponder Type Detected

### Circuit/System Description

When an remote key is inserted into the ignition lock cylinder and the ignition is turned ON, the transponder embedded in the remote key is energized by the exciter coils located in the theft deterrent module (TDM) surrounding the ignition lock cylinder. The energized transponder transmits a signal that contains its unique value, which is received by the TDM. The TDM is directly secured to the steering column module (CIM). The CIM compares this unique value to a value stored in memory. If the value is correct, the CIM will request vehicle starting.

### Conditions for Running the DTC

Ignition ON

### Conditions for Setting the DTC

The TDM determines the transponder is not a correct transponder type

### Action Taken When the DTC Sets

• | Vehicle starting is disabled

• | The Service Vehicle Soon indicator will flash and/or the Safeguard Check message is displayed on the driver information center (DIC)

### Conditions for Clearing the DTC

• | A current DTC will be cleared when the TDM detects a valid transponder from the remote key.

• | A history DTC will clear after 100 malfunction free ignition cycles.

### Reference Information

#### Schematic Reference

Immobilizer Schematics

#### Connector End View Reference

Component Connector End Views

#### Description and Operation

Immobilizer Description and Operation

#### Electrical Information Reference

• | Circuit Testing

• | Connector Repairs

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

#### Scan Tool Reference

Control Module References for scan tool information

### Circuit/System Verification

1. Inspect that all available remote keys are correct remote keys for the vehicle.

⇒ | If any remote keys are incorrect for the vehicle, replace the remote key.

2. Attempt to start the vehicle with each of the available remote keys. DTC B3077 should not set.

⇒ | If only one remote key causes DTC B3077 to set, replace the appropriate remote key.

⇒ | If all remote keys cause DTC B3077 to set, replace the CIM.

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

• | Replacing Keys

• | Control Module References for CIM replacement, programming, and setup