B250B
DTC B250B
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 Instructionsprovides an overview of each diagnostic category.
DTC Descriptors
DTC B250B 01
- Driver Door Unlatch Low Control Circuit Short to Battery
DTC B250B 02
- Driver Door Unlatch Low Control Circuit Short to Ground
Diagnostic Fault Information
Circuit/System Description
When any exterior door handle is lifted, switched ground signals are sent to the keyless entry control module through the door handle switch signal circuits. Upon receipt of these inputs, the keyless entry control module will check the door lock status of the following inputs:
* Door unlock switch activation
* Keyless entry unlock command
* Passive keyless entry unlock command message is received by the keyless entry control module
Once the enable criteria has been met, the keyless entry control module will supply power and ground to door latch control circuits and the door will release.
Conditions for Running the DTC
Battery voltage is between 9-16 V.
Conditions for Setting the DTC
B250B 01
The keyless entry control module detects a short to battery in the driver door unlatch motor unlatch control low circuit.
B250B 02
The keyless entry control module detects a short to ground in the driver door unlatch motor unlatch control low circuit.
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 Door Lock/Indicator Schematics
Connector End View Reference
Component Connector End Views Sunshade - Left (D6I)
Description and Operation
Power Door Locks 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 Control Module Referencesfor scan tool information
Circuit/System Verification
Ignition ON, command the body control module Driver Door Unlatch to Unlatch and return to Idle. The driver door latch should Unlatch when commanded.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the A23D Door Latch Assembly - Driver.
2. Ignition ON, verify that a test lamp does not illuminate between control circuit terminal 5 and ground.
• If the test lamp illuminates, test the control circuit for a short to voltage. If the circuit tests normal. replace the K84 Keyless Entry Control Module.
3. Verify that a test lamp does not illuminate between control circuit terminal 10 and ground.
• If the test lamp illuminates, test the control circuit for a short to voltage. If the circuit tests normal. replace the K84 Keyless Entry Control Module.
4. Verify that a test lamp does not illuminate between control circuit terminal 5 and B+.
• If the test lamp illuminates, test the control circuit for a short to ground. If the circuit tests normal. replace the K84 Keyless Entry Control Module.
5. Verify that a test lamp does not illuminate between control circuit terminal 10 and B+.
• If the test lamp illuminates, test the control circuit for a short to ground. If the circuit tests normal. replace the K84 Keyless Entry Control Module.
6. Connect a test lamp between the control circuit terminals 5 and 10.
7. Verify the test lamp illuminates briefly, while pulling the exterior door handle.
• If the test lamp does not illuminate, test the control circuits for an open/high resistance. If the circuits test normal, replace K84 Keyless Entry Control Module.
8. If all circuits test normal, test or replace the A23D Door Latch Assembly - Driver.
Component Testing
Door Latch Assembly Test
1. Ignition OFF, disconnect the harness connector at the A23D Door Latch Assembly - Driver.
2. Ignition ON, install a 15 A fused jumper wire between the control terminal 5 and B+.
3. Momentarily install a jumper wire between the control terminal 10 and ground. The door latch should perform the Unlock function.
• If the function does not perform as specified, replace the A23D Door Latch Assembly - Driver.
4. Reverse the jumper wires, the door latch assembly should perform the Lock function.
• If the function does not perform as specified, replace the A23D Door Latch Assembly - Driver.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
* Front Side Door Latch Replacement Service and Repair
* Control Module References Control Module Referencesfor keyless entry control module replacement, setup, and programming