PRE-RELEASE
DTC B252A or B252B
| DTC B252A or B252B |
| Diagnostic Instructions |
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Perform the
Diagnostic System Check - Vehicle
prior to using 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
has overviews of all diagnostic categories.
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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
| Circuit/System Description |
The keyless entry control module receives a discrete input from the driver and passenger door open switch signal circuits. The driver window motor or driver window switch receives a discrete input from the driver door ajar switch signal circuit. The passenger window switch receives a discrete input from the passenger door ajar switch signal circuit. The door ajar switches are integrated in the lock unit of the respective door. When a door is opened, the normally open door open and door ajar switch closes. With the door open switch closed, ground is provided to the door open switch signal circuit. The window switches communicate the door ajar data via serial data communication with the keyless entry control module.
| Conditions for Running the DTC |
Battery voltage is between 9-16 V.
| Conditions for Setting the DTC |
B252A 01
The keyless entry control module detects a short to voltage on the driver door unlatch enable circuit for 30 s.B252B 01
The keyless entry control module detects a short to voltage on the driver door unlatch enable circuit for 30 s.| Action Taken When the DTC Sets |
The keyless entry control module ignores inputs from the exterior door handle switches.
| 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 50 ignition cycles.
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| Reference Information |
Schematic Reference
Release Systems Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Power Door Latch 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 information on diagnostic tools
| Circuit/System Testing |
| 1. |
Ignition OFF, disconnect the harness connector at the malfunctioning door latch assembly.
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| 2. |
Ignition ON, verify that a test lamp does not illuminate between the control circuit terminal 5 and ground.
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| 3. |
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.
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Verify that a test lamp does not illuminate between the control circuit terminal 10 and ground.
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| 5. |
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.
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If all circuits test normal, replace the door latch assembly.
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| Repair Instructions |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
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Front Side Door Lock Replacement
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Control Module References
for keyless entry control module replacement, setup and programming
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