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DTC B3155

DTC B3155

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 B3155 00

Passenger Door Lock Switch, circuit, malfunction

Diagnostic Fault Information

Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance
Remote control, signal lock/unlock B3155 00 1 1 -
Passenger Door Handle Ground - 1 - -
1. Exterior Door Lock Switch Malfunction


Circuit/System Description

The exterior passenger door handle contains a small sensor which allows a person to lock the vehicle doors from the outside without using the remote keyless transmitter. The keyless entry control module monitors the voltage level on the passenger door handle switch signal circuit, when the switch is pressed, the voltage in the signal circuit will drop and the keyless entry control module will then send a serial data message to the BCM to command all the doors to lock.

Conditions for Running the DTC

Battery voltage is between 9-16 V.

Conditions for Setting the DTC

The keyless entry control module detects that the remote control's lock/unlock signal is shorted to ground longer than 45 seconds.

Action Taken When the DTC Sets

The keyless entry control module ignores the inputs from the passenger exterior door sensor.

Conditions for Clearing the DTC


• The DTC will be current for as long as the fault is present.

• When the fault is no longer present, the DTC will be a history DTC.

• A history DTC will clear after 50 ignition cycles.


Reference Information

Schematic Reference

Door Lock/Indicator Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Keyless Entry System Description and Operation (without ATH) and

Keyless Entry System Description and Operation (with ATH)

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 Touch Sensor parameter while pressing and releasing the passenger door handle lock switch. The value should change between Active and Inactive as the switch is pressed and released.

Circuit/System Testing


1. Ignition OFF, disconnect the harness connector at the A24P door handle assembly - passenger.

2. Test for less than 5 Ω between the ground circuit pin 4 and ground.

3. If the value is higher than the given range, test the ground circuit for open/high resistance.

4. Verify that the diagnostic tool parameter passenger door exterior handle touch sensor is Inactive.

5. If not the specified value, test the signal circuit terminal 3 for a short to ground. If the circuit tests normal, replace the K84 keyless entry control module.

6. Fit a 3 A fuse-protected jumper cable between the signal circuit pin 3 and ground, verify that the diagnostic tool parameter for passenger door exterior handle touch sensor is Active.

7. If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K84 keyless entry control module.

8. If all circuits test normal, test or replace the A24P door handle assembly - passenger.


Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.


• Front Side Door Outside Handle Replacement

• Control Module References for keyless entry control module replacement, setup, and programming