For 1990-2009 cars

## DTC B3031 North America, except Canada

### 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 B3031: Security System Controller In Learn Mode

### Circuit/System Description

When learning the voltage value delivered from the security resistor, the body control module (BCM) is placed in learn mode. DTC B3031 will set automatically as an indicator that the system is in learn mode and not as a fault indicator. Once the coded key is learned, learn mode will be exited and the DTC cleared. If the BCM does not exit learn mode, B3031 will remain current and indicate a fault.

### Conditions for Running the DTC

The BCM is in the Learn Passlock state.

### Conditions for Setting the DTC

The DTC will set any time the BCM is in the Learn Passlock state.

### Action Taken When the DTC Sets

• | Vehicle starting will be disabled.

• | The security indicator is illuminated.

### Conditions for Clearing the DTC

A current DTC will be cleared upon the successful exit of learn mode.

### 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 Testing

1. Verify DTCs B2957, B2958, or B3060 are not set as current.

⇒ | If any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle .

2. Verify the scan tool BCM Passlock State parameter displays Learn Passlock.

⇒ | If not the specified value, perform the 10 Minute Security Resistor Relearn procedure.

3. Perform the 10 Minute Vehicle Key Relearn procedure. The BCM should exit the Learn Passlock state and DTC B3031 should clear.

⇒ | If the TDM does not exit the learn coded key state after the programming attempt, replace the BCM.

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for BCM replacement, setup, and programming

## DTC B3031 Canada, Europe, Middle East, and Asia

### 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 and overview of each diagnostic category.

### DTC Descriptor

DTC B3031: Security System Controller In Learn Mode

### Circuit/System Description

When learning a vehicle key, the theft deterrent module (TDM) is placed in learn mode. DTC B3031 will set automatically as an indicator that the system is in learn mode and not as a fault indicator. Once the coded key is learned, learn mode will be exited and the DTC cleared. If the TDM does not exit learn mode, B3031 will remain current and indicate a fault.

### Conditions for Running the DTC

The immobilizer system is in learn mode.

### Conditions for Setting the DTC

DTC B3031 will set any time the TDM enters learn mode.

### Action Taken When the DTC Sets

The security indicator will illuminate.

### Conditions for Clearing the DTC

• | A current DTC B3031 will be cleared upon the successful exit of learn mode.

• | A history DTC will be cleared 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

• | Testing for Intermittent Conditions and Poor Connections

• | Circuit Testing

• | Wiring Repairs

• | Connector Repairs

#### Scan Tool Reference

Control Module References for scan tool information

### Circuit/System Verification

Important: When performing a 10 Minute Relearn Procedure, all keys not learned at that time will be erased and not be recognized. Perform the Adding Keys procedure on all keys or instruct the customer how to perform the Adding Keys procedure should all vehicle keys not be present at the time of repair.

1. Verify DTC B3060 is not set as current.

⇒ | If DTC B3060 is set as current, refer to DTC B3060 .

2. Perform the 10 Minute Vehicle Key Relearn procedure. Refer to Replacing Keys . The TDM should exit learn mode and DTC B3031 should clear.

⇒ | If the TDM does not exit learn mode, replace the TDM.

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for TDM replacement, setup, and programming