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
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Driver Exterior Door Handle Switch Circuit Short to Ground
Diagnostic Fault Information
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. These inputs allow the keyless entry control module to detect a driver door open request. The keyless entry control module provides a signal 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 is 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 driver door will not open when the exterior passenger door handle is pulled unless the door is first unlocked.
* The driver exterior door handle will fail to trigger an unlock command of a locked vehicle.
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 Sunshade - Left (DH6)
Description and Operation
Keyless Entry System Description and Operation (With ATS) Keyless Entry System Description and Operation (With ATS)Keyless Entry System Description and Operation (Without ATS) Keyless Entry System Description and Operation (Without ATS)
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
Ignition ON, observe the scan tool keyless entry control module Exterior Driver Door Handle Switch parameter while pulling and releasing the driver door handle. The parameter should change between Active and Inactive each time the handle is pulled and released.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the B27D door handle switch - driver exterior.
2. Test for less than 5 ohms between the ground circuit terminal 1 and ground.
• If greater than the specified range, test the ground circuit for an open/high resistance.
3. 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.
4. Install a 3 A fused jumper wire between the signal circuit terminal 2 and the ground circuit terminal 1. Verify the scan tool Exterior Driver Door Handle Switch parameter is Active.
• 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
5. 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.
• 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 5 ohms 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 Verification Tests after completing the repair.
* Front Side Door Outside Handle Replacement Front Side Door Outside Handle Replacement
* Control Module References Control Module References for keyless entry control module replacement, programming and setup