B3849

DTC B3849

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 B3849 02
- Driver Exterior Door Handle Switch Circuit Short to Ground

Diagnostic Fault Information





Circuit/System Description

The keyless entry control module supplies a 12V signal to the exterior driver door handle switch. When the driver door handle is activated, the switch closes and the voltage signal from the keyless entry control module are pulled to ground, this input allows the keyless entry control module to detect a door open request.

Conditions for Running the DTC

Battery voltage is between 9-16 V.

Conditions for Setting the DTC

The keyless entry control module detects the driver exterior door handle switch signal circuit is shorted to ground or closed for greater than 180 s.

Action Taken When the DTC Sets

The passive entry feature will be inoperative for the driver door and the driver door will not open unless the door is first unlocked by pressing the appropriate button on the keyless entry transmitter.

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 40 ignition cycles.

Reference Information
Schematic Reference

Door Lock/Indicator Schematics (Door Lock/Indicator Schematics)
Connector End View Reference

Component Connector End Views (Connector End Views By Name)
Description and Operation

Power Door Latch Description and Operation (Description and Operation)
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 (Programming and Relearning) for scan tool information

Circuit/System Verification

Ignition ON, observe the scan tool Exterior Driver Door Handle Switch parameter while pulling and releasing the B27A door handle switch - driver exterior. The parameter should change between Active and Inactive.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the B27A 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 K84 keyless entry control module.

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 K84 keyless entry control module.

4. If all circuits test normal, test or replace the B27A door handle switch - driver exterior.

Component Testing

Static Test
1. Ignition OFF, disconnect the harness connector at the B27A 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 B27A door handle switch - driver exterior.

3. With the switch in the closed position, test for less than 5 ohm between the signal terminal 2 and the ground terminal 1

• If greater than the specified range, replace the B27A door handle switch - driver exterior.

Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

* Front Side Door Outside Handle Replacement (Service and Repair)
* Control Module References (Programming and Relearning) for keyless entry control module replacement, setup, and programming