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 B2516 02: Driver Exterior Lock Switch Circuit Short to Ground

### Diagnostic Fault Information

Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance
--- | --- | --- | --- | ---
Driver Exterior Door Lock Switch Signal | B2516 02 | 1 | 1 | --
Driver Door Unlatch High Control | 2 | 2 | Beau 01 | --
Driver Door Unlatch Low Control | Beau 02 | 2 | Beau 01 | --
1. Door Lock Malfunction 2. Door Latch Malfunction

### Circuit/System Description

The driver exterior door lock switch signal circuit provides inputs to the remote control door lock receiver when the driver exterior door handle switch is activated. This input allows the remote control door lock receiver to detect a door open request. The remote control door lock receiver provides voltage to the driver front exterior door handle switch via the driver exterior door lock switch signal circuit. When the driver front door handle is activated, the switch closes and the voltage signals from the remote control door lock receiver are pulled to ground.

### Conditions for Running the DTC

Battery voltage is between 9-16 V.

### Conditions for Setting the DTC

The remote control door lock receiver detects a short to ground in the driver exterior lock switch signal circuit.

### Action Taken When the DTC Sets

The remote control door lock receiver ignores inputs from the driver exterior door handle switch.

### Conditions for Clearing the DTC

• | The condition responsible for setting the DTC no longer exists.

• | A history DTC will clear once 40 consecutive malfunction free ignition cycles have occurred.

### Reference Information

#### Schematic Reference

Door Lock/Indicator Schematics

#### Connector End View Reference

Component Connector End Views

#### Description and Operation

Power Door Locks 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

Ignition ON, observe the scan tool Exterior Driver. Door Handle Switch parameter while using the driver door handle. The parameter should change between Active and Inactive.

### Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the B27D Door Handle Switch - Driver Exterior.
2. Ignition ON, verify the scan tool Exterior Driver Door Handle Switch parameter is Inactive.

⇒ | If not the specified value, test the signal circuit terminal 2 for a short to ground. If the circuit tests normal, replace the K77 Remote Control Door Lock Receiver.

3. Connect the a 3 A jumper harness between the signal circuit terminal 2 and ground. Verify the scan tool Exterior Driver Door Handle Switch parameter is Active.

⇒ | If not the specified value, test the signal circuit terminal 2 for a open/high resistance. If the circuit tests normal, replace the K77 Remote Control Door Lock Receiver.

4. If all circuits test normal, test or replace the B27D Door Handle Switch - Driver Exterior.

### Component Testing

1. Ignition OFF, disconnect the harness connector at the B27D Door Handle Switch - Driver Exterior.
2. With the switch in the open position, test for infinite resistance between the signal terminal 2 and the ground terminal 1.

⇒ | If not the specified value, replace the B27D Door Handle Switch - Driver Exterior.

3. With the switch in the closed position, test for less than 1 Ω between the signal terminal 2 and the ground terminal 1

⇒ | If greater than the specified range, replace the B27D Door Handle Switch - Driver Exterior.

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

• | Front Side Door Outside Handle Replacement

• | Control Module References for remote control door lock receiver replacement, setup, and programming