Service Information

Orlando

DTC B250B

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 B250B 01: Driver Door Uncatch Low Control Circuit Short to Battery

DTC B250B 02: Driver Door Uncatch Low Control Circuit Short to Ground

Diagnostic Fault Information

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
Driver Door Uncatch High Control	B250B 02	B251B 04	B250B 01	-
Driver Door Uncatch Low Control	B250B 02	B251B 04	B250B 01	--

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 have been met, the keyless entry control module will supply power and ground to door catch 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-circuit to battery in the driver door release motor release control low circuit.

B250B 02

The keyless entry control module detects a short-circuit to ground in the driver door release motor release 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

Electrical Information Reference

•	Circuit Testing

•	Connector Repairs

•	Testing for Intermittent Conditions and Poor Connections

•	Wiring Repairs

Scan Tool Reference

Control Module References for 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

Ignition OFF, disconnect the harness connector at the A23D Door Latch Assembly - Driver.
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.

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.

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.

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.

Connect a test lamp between the control circuit terminals 5 and 10.
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.

If all circuits test normal, test or replace the A23D Door Latch Assembly - Driver.

Component Testing

Door Catch Assembly Test

Ignition OFF, disconnect the harness connector at the A23D Door Latch Assembly - Driver.
Ignition ON, install a 15 A fused jumper wire between the control terminal 5 and B+.
Momentarily install a jumper wire between the control terminal 10 and ground. The door catch should perform the Unlock function.

⇒	If the function does not perform as specified, replace the A23D Door Latch Assembly - Driver.

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 after completing the diagnostic procedure.

•	Front Side Door Catch Replacement

•	Control Module References for keyless entry control module replacement, setup, and programming