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
- Exterior Door Handle Switch Circuit Short To Ground
Diagnostic Fault Information
Circuit/System Description
The exterior door handle switch signal circuit provides inputs to the remote control door lock receiver (RCDLR) and the driver or passenger door module (DDM/PDM) when the exterior door handle switch is activated. This input allows the DDM/PDM and RCDLR to detect a door open request. The DDM/PDM and RCDLR provide voltage to the exterior door handle switch via the front door handle switch signal circuit. When the front door handle is activated, the switch closes and the voltage signals from the DDM/PDM and RCDLR are pulled to ground.
Conditions for Running the DTC
The system voltage is 9-16 volts.
Conditions for Setting the DTC
The RCDLR or DDM/PDM detects the front exterior door handle switch signal circuit is closed for greater than 180 seconds.
Action Taken When the DTC Sets
The RCDLR or DDM/PDM ignores inputs from the exterior door handle switch until the switch changes state.
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 (Connector Views)
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
1. Ignition ON, observe the scan tool Driver Door Module Driver Door Handle parameter and the scan tool Remote Control Door Lock Receiver Ext Driver Door Handle Switch parameter while using the exterior driver door handle. The parameter should change between Inactive and Active.
2. Observe the scan tool Passenger Door Module Driver Door Handle parameter and the scan tool Remote Control Door Lock Receiver Ext Psgr Door Handle Switch parameter while using the exterior passenger door handle. The parameter should change between Inactive and Active.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the appropriate exterior door handle switch assembly and the X1 harness connector at the RCDLR.
2. Ignition ON, verify the scan tool Door Handle parameter is Inactive.
• If not the specified value, test the signal circuit terminal E for a short to ground. If the circuit tests normal, replace the door control module.
3. Install a 3A fused jumper wire between the signal circuit terminal E and ground. Verify the scan tool Door Handle 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 door control module.
4. Ignition OFF, connect the X1 harness connector at the RCDLR and and disconnect the X2 harness connector at the door module.
5. Verify the scan tool Remote Control Door Lock Receiver Ext. Door Handle Switch parameter is Inactive.
• If not the specified value, test the signal circuit terminal E for a short to ground. If the circuit tests normal, replace the RCDLR.
6. Install a 3A fused jumper wire between the signal circuit terminal E and ground. Verify the scan tool Ext. 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 RCDLR.
7. If all circuits test normal, test or replace the exterior door handle switch assembly.
Component Testing
1. Ignition OFF, disconnect harness connector at the appropriate exterior door handle.
2. Test for infinite resistance between the signal terminal and the ground terminal listed below with the door handle switch in the open position.
* Signal terminal E and ground terminal F
* Signal terminal D and ground terminal C
• If not the specified value, replace exterior door handle.
3. Test for less than 2 ohms between the signal terminal and the ground terminal listed below with the door handle switch in the closed position.
* Signal terminal E and ground terminal F
* Signal terminal D and ground terminal C
• If greater than the specified range, replace exterior door handle.
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 DDM, PDM, or RCDLR replacement, setup, and programming