DTC B3849 With UHA/UHF
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 provides an overview of each diagnostic category. |
DTC Descriptors
DTC B3849 00: Exterior Door Handle Switch CircuitDTC B3849 02: Exterior Driver Door Handle Switch Circuit
Diagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Lock Relay B+ | 3 | 3 | -- | -- |
Unlock Relay B+ | 3 | 3 | -- | -- |
Driver Door Handle Switch Signal | B3849 00, B3849 02 | 1 | 1 | -- |
Passenger Door Handle Switch Signal | B1474 02 | 2 | 2 | -- |
Driver Door Latch Control | 1 | 1 | 1 | -- |
Lock Relay Control | B3135 00 | 3 | 3 | -- |
LR Door Latch Control | 3 | 3 | 3 | -- |
Passenger Door Latch Control | 2 | 2 | 2 | -- |
RR Door Latch Control | 3 | 3 | 3 | -- |
Unlock Relay Control | 3 | 3 | B3130 00 | -- |
Driver Door Handle Switch Ground | -- | 1 | 1 | -- |
Passenger Door Handle Switch Ground | -- | 2 | 2 | -- |
Lock Relay Ground | -- | 3 | 3 | -- |
Unlock Relay Ground | -- | 3 | 3 | -- |
1. Driver Door Lock Malfunction 2. Passenger Door Lock Malfunction 3. Rear Door Lock Malfunction | ||||
Circuit/System Description
The exterior door handle switch signal circuit provides inputs to the remote control door lock receiver (RCDLR) and the driver door module (DDM) when the exterior door handle switch is activated. This input allows the DDM and RCDLR to detect a door open request. The DDM 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 and RCDLR are pulled to ground.
Conditions for Running the DTC
DTC B1325 is not set
Conditions for Setting the DTC
The RCDLR or DDM detects the driver exterior door handle switch signal circuit is closed for greater than 180 seconds.
Action Taken When the DTC Sets
The RCDLR and DDM ignores inputs from the front 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
Description and Operation
Power Door Latch Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
With the doors unlocked, open the driver door by using the driver exterior door handle. The driver door should release and open when using the driver exterior door handle.
Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the driver exterior door handle.
- Disconnect the X1 harness connector at the RCDLR.
- Ignition ON, test for greater than 9 volts between the signal circuit terminal E and ground.
- Ignition OFF, connect the harness connector X1 at the RCDLR and disconnect the harness connector X6 at the DDM.
- Ignition ON, test for greater than 9 volts between the signal circuit terminal E and ground.
- If all circuits test normal, test or replace the driver exterior door handle.
| ⇒ | If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the ciruict tests normal, replace the DDM. |
| ⇒ | If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the RCDLR. |
Component Testing
- Ignition OFF, disconnect the harness connector at the driver door handle.
- Test for infinite resistance between the signal terminal E and the ground terminal F with the switch in the open position.
- Test for less than 2 ohms between the signal terminal E and the ground terminal F with the switch in the closed position.
- If greater than the specified range, replace the driver door handle.
| ⇒ | If not the specified value, replace the driver door handle. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for DDM or RCDLR replacement, setup, and programming |
DTC B3849 Without UHA/UHF
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 provides an overview of each diagnostic category. |
DTC Descriptor
DTC B3849 00: Exterior Door Handle Switch CircuitDiagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Lock Relay B+ | 3 | 3 | -- | -- |
Unlock Relay B+ | 3 | 3 | -- | -- |
Driver Door Handle Switch Signal | B3849 00, B3849 02 | 1 | 1 | -- |
Passenger Door Handle Switch Signal | B1474 02 | 2 | 2 | -- |
Driver Door Latch Control | 1 | 1 | 1 | -- |
Lock Relay Control | B3135 00 | 3 | 3 | -- |
LR Door Latch Control | 3 | 3 | 3 | -- |
Passenger Door Latch Control | 2 | 2 | 2 | -- |
RR Door Latch Control | 3 | 3 | 3 | -- |
Unlock Relay Control | 3 | 3 | B3130 00 | -- |
Driver Door Handle Switch Ground | -- | 1 | 1 | -- |
Passenger Door Handle Switch Ground | -- | 2 | 2 | -- |
Lock Relay Ground | -- | 3 | 3 | -- |
Unlock Relay Ground | -- | 3 | 3 | -- |
1. Driver Door Lock Malfunction 2. Passenger Door Lock Malfunction 3. Rear Door Lock Malfunction | ||||
Circuit/System Description
The exterior door handle switch signal circuit provides inputs to the driver door module (DDM) when the exterior door handle switch is activated. This input allows the DDM to detect a door open request. The DDM provides 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 are pulled to ground.
Conditions for Running the DTC
Battery voltage is between 9-16 volts.
Conditions for Setting the DTC
The DDM detects the driver exterior door handle switch signal circuit is shorted to ground for greater than 180 seconds.
Action Taken When the DTC Sets
The DDM 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
Description and Operation
Power Door Latch Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
With the doors unlocked, open the driver door by using the driver exterior door handle. The driver door should release and open when using the exterior door handle.
Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the driver exterior door handle switch.
- Ignition ON, test for greater than 9 volts between the signal circuit terminal B and ground.
- Test for greater than 9 volts between the signal circuit terminal E and ground.
- If all circuits test normal, test or replace the driver exterior door handle.
| ⇒ | If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the ciruict tests normal, replace the DDM. |
| ⇒ | If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the ciruict tests normal, replace the DDM. |
Component Testing
- Ignition OFF, disconnect the harness connector at the driver door handle switch.
- Test for infinite resistance between the signal terminal E and the ground terminal F with the switch in the open position.
- Test for less than 2 ohms between the signal terminal E and the ground terminal F with the switch in the closed position.
- If greater than the specified range, replace the driver door handle switch.
| ⇒ | If not the specified value, replace the driver door handle switch. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for DDM replacement, setup, and programming |
