DTC B3125, B3130, or B3135
Diagnostic Instructions
DTC Descriptors
DTC B3125 02: Driver Door Only Unlock
Circuit Short to Ground
DTC B3125 04: Driver Door Only Unlock
Circuit Open
DTC B3130 02: All Doors Unlock Circuit
Short to Ground
DTC B3130 04: All Doors Unlock Circuit Open
DTC B3135 02: All Doors Lock Circuit Short
to Ground
DTC B3135 04: All Doors Lock Circuit Open
Diagnostic Fault Information
|
Circuit
|
Short to Ground
|
Open/High Resistance
|
Short to Voltage
|
Signal Performance
|
|
Door Lock Switch Signal
|
B3150 00
|
1
|
1
|
--
|
|
Door Unlock Switch Signal
|
B3140 00
|
2, 3
|
2, 3
|
--
|
|
Driver Door Unlock Control
|
B3125 02, B3130 02, B3135 02
|
1, 2, 3, 4
|
1, 2, 3, 4
|
--
|
|
Doors Lock Control
|
B3125 02, B3130 02, B3135 02
|
1, 2, 3, 4
|
1, 2, 3, 4
|
--
|
|
Passenger Doors Unlock Control
|
B3125 02, B3130 02, B3135 02
|
1, 2, 3, 4
|
1, 2, 3, 4
|
--
|
|
Fuel Filler Door Lock Control
|
B3125 02, B3130 02, B3135 02
|
4
|
1, 2, 3, 4
|
--
|
|
Doors Dead Lock Control
|
B3797 02
|
1, 2, 3
|
1, 2, 3
|
--
|
|
Door Lock Switch Ground
|
-
|
1, 2, 3, 4
|
1, 2, 3, 4
|
--
|
|
1. Door Lock Malfunction
2. Driver Door Unlock Malfunction
3. Door Unlock Malfunction
4. Fuel Filler Door Release Inoperative
|
Circuit/System Description
The body control module (BCM) controls the door lock, passenger
door unlock and driver door unlock circuits. Voltage is applied to
the appropriate circuit when the BCM senses a door lock/unlock
switch activation or a keyless entry lock or unlock command.
Conditions for Running the DTC
The system voltage is 9-18 V.
Conditions for Setting the DTC
B3125 02
The BCM detects a short to ground on the driver door unlock
control circuit.
B3125 04
The BCM detects an open on the driver door unlock control
circuit.
B3130 02
The BCM detects a short to ground on the unlock door control
circuit.
B3130 04
The BCM detects an open on the unlock door control circuit.
B3135 02
The BCM detects a short to ground on the door lock control
circuit.
B3135 04
The BCM detects an open on the door lock control circuit.
Action Taken When the DTC Sets
The power door locks will be inoperative.
Conditions for Clearing the DTC
| • |
This 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
Connector End View Reference
Component Connector End Views
Description and Operation
Power Door Locks Description and Operation
Electrical Information Reference
Circuit/System Verification
Command the All Door Lock, Driver Door Unlock and Passenger
Door(s) Unlock with the scan tool, the doors should perform the
lock and unlock function.
Circuit/System Testing
- Ignition OFF, disconnect the X2 harness connector at
the K9 Body Control Module.
- Ignition ON, verify that a test lamp illuminates
between the B+ circuit terminal 4 X2 and ground.
| ⇒ |
If the test lamp does not illuminate, test the B+
circuit for a short to ground or an open/high resistance. If the
circuit tests normal, replace the F10 DA fuse or the
X51A Fuse Block - Instrument Panel. |
- Ignition OFF, connect the X2 harness connector at the
K9 Body Control Module.
- Disconnect the A23D Door Catch Assembly - Driver
harness connector.
- Verify that DTC B3125 02, B3130 02, or
B3135 02 does not reset.
| ⇒ |
If the DTC does not reset, test or replace the
A23D Door Latch Assembly - Driver. |
- Ignition OFF, disconnect the A23P Door Catch
Assembly - Passenger harness connector.
- Verify that DTC B3125 02, B3130 02, or
B3135 02 does not reset.
| ⇒ |
If the DTC does not reset, test or replace the
A23P Door Latch Assembly - Passenger. |
- Ignition OFF, disconnect the A23LR Door Catch
Assembly - Left Rear harness connector.
- Verify that DTC B3125 02, B3130 02, or
B3135 02 does not reset.
| ⇒ |
If the DTC does not reset, test or replace the
A23LR Door Latch Assembly - Left Rear. |
- Ignition OFF, disconnect the A23RR Door Catch
Assembly - Right Rear harness connector.
- Verify that DTC B3125 02, B3130 02, or
B3135 02 does not reset.
| ⇒ |
If the DTC does not reset, test or replace the
A23RR Door Latch Assembly - Right Rear. |
- Ignition OFF, disconnect the M27 Fuel Door
Unlatch Actuator harness connector.
- Verify that DTC B3125 02, B3130 02, or
B3135 02 does not reset.
| ⇒ |
If the DTC does not reset, test or replace the
M27 Fuel Door Unlatch Actuator. |
- Ignition OFF, disconnect the X6 harness connector at
the K9 Body Control Module.
- Test for infinite resistance between the circuit
terminals listed below and ground:
| • |
Control circuit terminal 1 X6 |
| • |
Control circuit terminal 2 X6 |
| • |
Control circuit terminal 4 X6 |
| ⇒ |
If less than the specified value, test the control
circuit for a short to ground. |
- If all circuits test normal, replace the K9 Body
Control Module
Component Testing
Door Latch Test
- Ignition OFF, disconnect the harness connector at the
appropriate door latch assembly.
- Install a 25 A fused jumper wire between the lock
control terminal and 12 V. Momentarily install a jumper wire
between the unlock control terminal and ground. The door catch
assembly should perform the Lock/Unlock function.
| ⇒ |
If the function does not perform as specified,
replace the door latch assembly. |
- Reverse the jumper wires; the appropriate door lock
should perform the Unlock/Lock function.
| ⇒ |
If the function does not perform as specified,
replace the door latch assembly. |
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
|
