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DTC B3849

DTC B3849

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 has overviews of all diagnostic categories.


DTC Descriptor

DTC B3849 02

Driver Exterior Door Handle Switch Circuit Short to Ground

Diagnostic Fault Information

Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance
Driver Door Handle Switch Signal

B3849 02

1

1

-

Passenger Door Handle Switch Signal

B1474 02

1

1

-

Left Rear Door Handle Switch Signal

B1534 02

1

1

-

Right Rear Door Handle Switch Signal

B1534 02

1

1

-

Driver Door Handle Switch Ground

-

1

1

-

Passenger Door Handle Switch Ground

-

1

1

-

Left Rear Door Handle Switch Ground

-

1

1

-

Right Rear Door Handle Switch Ground

-

1

1

-

1. Power Door Latch Malfunction



Circuit/System Description

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

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 more than 180 s.

Action Taken When the DTC Sets

The keyless entry control module ignores inputs from the driver 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

Connector End View Reference

Component Connector End Views

Description and Operation

Power Door Latch 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 information on diagnostic tools

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.

3. 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.

4. 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.

5. If not the specified value, test the signal circuit terminal 2 for an open/high resistance. If the circuit tests normal replace the K84 Keyless Entry Control Module.

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


Component Testing


Static Test

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.

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

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

5. 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 (Base)

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