Vehicle Access
DTC B3155
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.
DTC Descriptor
DTC B3155 00
- Passenger Door Lock Switch Circuit
Diagnostic Fault Information
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 the passenger door lock switch lock circuit is shorted to ground for greater than 45 seconds.
Action Taken When the DTC Sets
The keyless entry control module ignores inputs from the passenger exterior door handle switch.
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 Door Lock/Indicator Schematics
Connector End View Reference
Component Connector End Views Outside Rearview Mirror - Driver
Description and Operation
Keyless Entry System Description and Operation (with BTM) Keyless Entry System Description and Operation (with BTM)Keyless Entry System Description and Operation (without BTM) Keyless Entry System Description and Operation (without BTM)
Electrical Information Reference
* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs
Scan Tool Reference
Control Module References Control Module References for scan tool information
Circuit/System Verification
1. Ignition ON.
2. Verify the scan tool Exterior Passenger Door Handle Touch Sensor parameter changes between Active and Inactive when pressing the door handle touch sensor-passenger exterior.
• If the parameter does not change
Refer to Circuit/System Testing.
• If the parameter changes
3. All OK.
Circuit/System Testing
1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the A24P door handle assembly-passenger exterior. It may take up to 2 minutes for all vehicle systems to power down.
2. Test for less than 10 ohms between the ground circuit terminal 4 and ground.
• If 10 ohms or greater
1. Ignition OFF.
2. Test for less than 2 ohms in the ground circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, repair the open/high resistance in the ground connection.
• If less than 10 ohms
3. Ignition ON.
4. Verify the scan tool Exterior Passenger Door Handle Touch Sensor parameter is Inactive.
• If not Inactive
1. Ignition OFF, disconnect the harness connector at the K84 keyless entry control module.
2. Test for infinite resistance between the signal circuit terminal 3 and ground.
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance, replace the K84 keyless entry control module.
• If Inactive
5. Install a 3 A fused jumper wire between the signal circuit terminal 3 and the ground circuit terminal 4.
6. Verify the scan tool Exterior Passenger Door Handle Touch Sensor parameter is Active.
• If not Active
1. Ignition OFF, disconnect the harness connector at the K84 keyless entry control module, ignition ON.
2. Test for less than 1 V between the signal circuit and ground.
• If 1 V or greater, repair the short to voltage on the circuit.
• If less than 1 V
3. Test for less than 2 ohms in the signal circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the K84 keyless entry control module.
• If Active
7. Test or replace the A24P door handle assembly-passenger exterior.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
* Front Side Door Outside Handle Replacement Front Side Door Outside Handle Replacement
* Control Module References Control Module References for the keyless entry control module replacement, setup and programming