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 B3130 00: Passenger Door Unlock Circuit

### Diagnostic Fault Information

Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance
--- | --- | --- | --- | ---
Passenger Door Unlock Relay Control | B3130 00 | 1 | 1 | --
1. Power Door Locks Inoperative - Passenger Door

### Circuit/System Description

When the passenger door lock switch is place in to the UNLOCK position, ground is applied through the switch to the body control module (BCM). The BCM then applies ground through the passenger door unlock relay control circuit to the coil side of the passenger unlock relay in the body electrical center (BEC). The relay then engages and applies voltage to all of the passenger door lock assemblies.

### Conditions for Running the DTC

The ignition is ON.

### Conditions for Setting the DTC

The BCM receives a voltage signal on the passenger door unlock relay control circuit.

### Action Taken When the DTC Sets

The BCM cease attempt to unlock the doors.

### Conditions for Clearing the DTC

The BCM clears this code from current when the fault is removed from the system.

### Reference Information

#### Schematic Reference

Door Lock/Indicator Schematics

#### Connector End View Reference

Vehicle Access Connector End Views

#### Electrical Information Reference

• | Circuit Testing

• | Connector Repairs

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

#### Scan Tool Reference

• | Scan Tool Output Controls

• | Scan Tool Data List

• | Scan Tool Data Definitions

### Circuit/System Verification

Ignition ON, place the driver door lock switch to the UNLOCK position. The driver door should unlock.

### Circuit/System Testing

1. Disconnect the BEC connector C1. Verify the DTC resets.

⇒ | If the DTC does not reset, replace the BEC.

2. Test for a short to voltage in the passenger door unlock relay control circuit.

⇒ | If all circuits/connections test normal, replace the BCM.

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

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

• | Instrument Panel Electrical Center or Junction Block Replacement - Right Side