PRE-RELEASE
DTC B3797
| DTC B3797 |
| 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 Descriptor |
DTC B3797 02
All Door Dead Lock Circuit Short to Ground
| Diagnostic Fault Information |
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
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Door Lock Switch Signal
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B3150 00
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B3150 00
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B3150 00
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-
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Door Unlock Switch Signal
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B3140 00
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B3140 00
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B3140 00
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-
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Driver Door Unlock Control
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B3125 02, B3130 02, B3135 02
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1, 2
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1, 2
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-
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Doors Lock Control
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B3125 02, B3130 02, B3135 02
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1, 2, 3
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1, 2, 3
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-
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Passenger Doors Unlock Control
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B3125 02, B3130 02, B3135 02
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1, 3
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1, 3
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-
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Doors Dead Lock Control
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B3797 02
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1, 2, 3
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1, 2, 3
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-
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Door Lock Switch Ground
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-
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1, 2, 3
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1, 2, 3
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-
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1. Door Lock Malfunction
2. Driver Door Unlock Malfunction 3. Door Unlock Malfunction |
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| Circuit/System Description |
The body control module (BCM) controls the driver door lock relay.
| Conditions for Running the DTC |
Battery voltage must be between 9-16 V.
| Conditions for Setting the DTC |
The BCM detects a short to ground in the doors dead lock circuit.
| Action Taken When the DTC Sets |
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The BCM stores the DTC to memory.
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The power door locks will be inoperative.
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| Conditions for Clearing the DTC |
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This DTC will change from current to history when the fault is no longer present.
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A history DTC will clear after 100 consecutive ignition cycles if the condition for the malfunction is no longer present.
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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 information on diagnostic tools
| Circuit/System Verification |
Ignition ON, command the Door Deadlock to Lock and Unlock with a scan tool. Listen or feel for the operation of the door deadlock actuators locking and unlocking.
| Circuit/System Testing |
| 1. |
Ignition OFF, disconnect the X7 harness connector at the K9 Body Control Module.
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| 2. |
Test for greater than 50 Ω between the control circuit terminal 4 and ground.
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| 3. |
If less than the specified value, test the control circuit for a short to ground. If the circuit tests normal, replace the X50A Fuse Block - Underhood.
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| 4. |
If all circuits test normal, replace the K9 Body Control Module
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| Repair Instructions |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
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Underhood Electrical Center or Junction Block Replacement
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Control Module References
for information on BCM replacement, setup, and programming
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