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 Descriptor
DTC B3152: Lock Switch Circuit LowDiagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Driver Door Lock and Window Switch B+ | 1, 2 | 1, 2 | -- | -- |
Driver Door Unlock Signal | -- | 2, 3 | -- | -- |
All Door Lock Signal | B3152 | 2, 3 | -- | -- |
Driver Door Lock Actuator Control | 4, 5, 6 | 4 | 4 | -- |
Passenger Door Lock Actuator Control | 4, 5, 6 | 5 | 5 | -- |
Rear Door Lock Actuator Control | 4, 5, 6 | 6 | 6 | -- |
Driver Door Lock and Window Switch Ground | -- | 1, 2 | 1, 2 | -- |
1. Driver Door Lock Switch Malfunction 2. Passenger Door Lock Switch Malfunction 3. Key Fob Malfunction 4. Driver Door Lock Malfunction 5. Passenger Door Lock Malfunction 6. Rear Door Lock Malfunction | ||||
Circuit/System Description
The driver door lock actuator unlock control circuit is a dedicated control circuit used only for the driver door lock actuator motor. This is done so that the driver door may be unlocked by itself using a keyless entry transmitter or an automatic door unlock function, if programmed.
Conditions for Running the DTC
Battery voltage must be between 9-16 volts.
Conditions for Setting the DTC
The body control module (BCM) detects a short to ground in the passenger door lock switch lock control circuit for greater than 60 seconds.
Action Taken When the DTC Sets
The driver or passenger door lock switch may malfunction.
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
Schematic Reference
Door Lock/Indicator Schematics
Connector End View Reference
Description and Operation
Power Door Locks Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
Ignition ON, command the driver door to UNLOCK and all doors to LOCK with a scan tool. The driver door should perform the UNLOCK function and all doors should perform the LOCK function.
Circuit/System Testing
- Ignition OFF, disconnect the X2 harness connector at the driver door lock switch.
- Disconnect the harness connector at the passenger door lock switch.
- Connect a test lamp between the driver door lock switch control circuit terminal 7 and B+.
- Ignition ON, command the doors to LOCK with a scan tool. The test lamp should illuminate during the LOCK command.
- Ignition OFF, connect the harness connector at the passenger door lock switch and disconnect the harness connector at the BCM.
- Ignition ON, command the doors to LOCK by using the passenger door lock switch. The test lamp should illuminate during the LOCK command.
- If all circuits test normal, replace the driver door lock switch.
| ⇒ | If the test lamp is always OFF, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the BCM. |
| ⇒ | If the test lamp is always ON, test the control circuit terminal for a short to ground. If the circuit tests normal, replace the BCM. |
| ⇒ | If the test lamp is always OFF, replace the passenger door lock switch. |
| ⇒ | If the test lamp is always ON, replace the passenger door lock switch. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for BCM replacement, setup, and programming |
