B1474

Exterior Door Handle Switch Malfunction - DTC B1474, B1534, B1535, or 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 Descriptors
DTC B1474 02
- Passenger Exterior Door Handle Switch Circuit Short to Ground

DTC B1534 02
- Left Rear Door Handle Switch Circuit Short to Ground

DTC B1535 02
- Right Rear Door Handle Switch Circuit Short to Ground

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

Diagnostic Fault Information






Circuit/System Description

The exterior door handle switch signal circuits provide inputs to the keyless entry control module when the exterior door handle switches are activated. These inputs allow the keyless entry control module to detect a door unlock request. The keyless entry control module provides a 12 V signal to each exterior door handle switch via the door handle switch signal circuits. When a door handle switch is pressed, 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

B1474 02

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

B1534 02

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

B1535 02

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

B3849 02

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 will ignore input from the affected door switch and the door will not unlock when the door handle switch is pressed.

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 Hybrid/EV Battery Pack X1
Description and Operation

Keyless Entry System 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

Vehicle in Service Mode, observe the scan tool keyless entry control module Exterior Driver Door Handle Switch, Exterior Passenger Door Handle Switch, Exterior Left Rear Door Handle Switch and Exterior Right Rear Door Handle Switch parameters while pressing and releasing each exterior door handle switch. The parameter for each should change between Active and Inactive

Circuit/System Testing

1. Vehicle OFF, disconnect the harness connector at the appropriate exterior A24 door handle assembly.
2. Test for less than 5 ohm between the ground circuit terminal 4 and ground.

• If greater than the specified range, test the ground circuit for an open/high resistance.

3. Vehicle in Service Mode, verify the appropriate scan tool Exterior Door Handle Switch parameter is Inactive.

• If not the specified value, test the signal circuit terminal 3 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 3 and the ground circuit terminal 4. Verify the scan tool Exterior 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 A24 door handle assembly.

Component Testing

Exterior Door Handle Switch Test
1. Vehicle OFF, disconnect the harness connector at the appropriate exterior A24 door handle assembly.
2. With the switch in the open position, test for infinite resistance between the signal terminal 3 and the ground terminal 4.

• If not the specified value, replace the exterior A24 door handle assembly.

3. With the switch in the closed position, test for less than 5 ohm between the signal terminal 3 and the ground terminal 4.

• If greater than the specified range, replace the exterior A24 door handle assembly.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the repair.

* Front Side Door Outside Handle Replacement (Base) Front Side Door Outside Handle Replacement (Base)Front Side Door Outside Handle Replacement (Pass Key Entry ATH) Front Side Door Outside Handle Replacement (Pass Key Entry ATH)
* Rear Side Door Outside Handle Replacement Rear Side Door Outside Handle Replacement
* Control Module References Programming and Relearning for keyless entry control module replacement, programming and setup