PRE-RELEASE
DTC B252A or B252B
| DTC B252A or B252B |
| Diagnostic Instructions |
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Perform the
Diagnostic System Check - Vehicle
before starting this diagnostic procedure.
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Review
Strategy Based Diagnosis
for an overview of the diagnostic approach.
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Diagnostic Procedure Instructions
provides an overview of each diagnostic category.
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| DTC Descriptors |
DTC B252A 01
Driver Door Unlatch Enable Circuit Short to Battery
DTC B252B 01
Passenger Door Unlatch Enable Circuit Short to Battery
| Diagnostic Fault Information |
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
| Driver Door Release Signal | B251B 02 | 1 | B252A 01 | - |
| Passenger Door Release Signal | B251A 02 | 2 | B252B 01 | - |
| 1. Driver Door Unlatch Malfunction 2. Passenger Door, Left Rear Door and Right Rear Door Unlatch Malfunction | ||||
| Circuit/System Description |
The keyless entry control module will detect the keyless entry transmitter when an exterior door handle is pulled and the transmitter is within 1 meter (3 feet) of the door handle, the body control module (BCM) will unlock the doors and send the unlatch enable signal to keyless entry control module.
| Conditions for Running the DTC |
The system voltage is 9-16 V.
| Conditions for Setting the DTC |
B252A 02
The keyless entry control module detects a short to voltage for greater than 3 seconds on the driver door lock actuator unlock control circuit.B252B 02
The keyless entry control module detects a short to voltage for greater than 3 seconds on the door lock control circuit.| Action Taken When the DTC Sets |
B252A 02
The driver door will require two pulls of their exterior door handle to unlock the door and then to unlatch the door.B252B 02
The passenger, left rear and right rear doors will require two pulls of their exterior door handles to unlock the doors and then to unlatch the doors.| Conditions for Clearing the DTC |
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This DTC will be current for as long as the fault is present
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When the fault is no longer present, the DTC will be a history DTC
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A history DTC will clear after 40 ignition cycles
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| Reference Information |
Schematic Reference
Door Lock/Indicator Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Power Door Locks Description and Operation
Electrical Information Reference
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Circuit Testing
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Connector Repairs
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Testing for Intermittent Conditions and Poor Connections
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Wiring Repairs
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Scan Tool Reference
Control Module References for scan tool information
| Circuit/System Verification |
| 1. |
Doors locked, approach the vehicle with the keyless entry transmitter and lift the exterior driver door handle. The driver door should unlock and unlatch allowing the driver door to be pulled open.
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| 2. |
If the driver door will not unlock and unlatch with a single pull of the driver door handle, refer to Driver Door Release Command Malfunction.
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| 3. |
Doors locked, approach the vehicle with the keyless entry transmitter and lift the exterior passenger door handle. The passenger door should unlock and unlatch allowing the passenger door to be pulled open.
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| 4. |
If the passenger door will not unlock and unlatch with a single pull of the door handle, refer to Passenger and Rear Door Release Command Malfunction.
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| Circuit/System Testing |
Driver Door Release Command Malfunction
| 1. |
Ignition OFF, disconnect the X4 harness connector at the K84 keyless entry control module.
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| 2. |
Verify that a test lamp does not illuminate between the signal circuit terminal 3 and ground.
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| 3. |
If the test lamp is ON, test the signal circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM.
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| 4. |
If all circuits test normal, replace the K84 keyless entry control module.
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Passenger and Rear Door Release Command Malfunction
| 1. |
Ignition OFF, disconnect the X4 harness connector at the K84 keyless entry control module.
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| 2. |
Verify that a test lamp does not illuminate between the signal circuit terminal 14 and ground.
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| 3. |
If the test lamp is ON, test the signal circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM.
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| 4. |
If all circuits test normal, replace the K84 keyless entry control module.
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| Repair Instructions |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for BCM or keyless entry control module replacement, setup and programming
