B3150
DTC B3140 or B3150
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.
DTC Descriptors
DTC B3140 00
-
Driver Unlock Switch Circuit
DTC B3150 00
-
Driver Lock Switch Circuit
Diagnostic Fault Information
Circuit/System Description
The body control module (BCM) supplies and monitors a 12 V signal to the door lock/window switch through the door lock switch lock and unlock signal circuits. The door lock/window switch also receives a constant ground source. If a door lock switch is placed in the lock position or unlock position, the reference voltage is taken directly to ground and the BCM will detect the voltage drop on the signal circuit and will command the doors to lock or unlock.
Conditions for Running the DTC
The system voltage is 9-16 V.
Conditions for Setting the DTC
B3140 00
The BCM detects a short to ground in the unlock switch signal circuit for greater than 60 seconds.
B3150 00
The BCM detects a short to ground in the lock switch signal circuit for greater than 60 seconds
Action Taken When the DTC Sets
The BCM will ignore the command and the power door lock switch will 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 become a history DTC.
* A history DTC will clear after 50 ignition cycles.
Reference Information
Schematic Reference
Door Lock/Indicator Schematics Door Lock/Indicator Schematics
Connector End View Reference
Component Connector End Views Fuel Pump and Level Sensor Assembly
Description and Operation
Power Door Locks Description and Operation Description and Operation
Electrical Information Reference
* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs
Scan Tool Reference
Control Module References Control Module References for scan tool information
Circuit/System Verification
1. Detective model, Igniton ON, observe the scan tool Driver Door Lock Sw. and Driver Door Unlock Sw. parameters while using the S101 door lock/window switch. The parameter should change between Inactive and Active.
• If the value does not change, refer to Door Lock Switch Malfunction, Detective Model.
2. Police model, Ignition ON, observe the scan tool Driver Door Lock Sw. and Driver Door Unlock Sw. parameters while using the S101 door lock/window switch and by using the S79P window switch-passenger. The parameter should change between Inactive and Active while using each switch.
• If the value does not change, refer to Door Lock Switch Malfunction, Police Model.
Circuit/System Testing
Door Lock Switch Malfunction, Detective Model
1. Ignition OFF, disconnect the X2 harness connector at the S101 door lock/window switch.
2. Ignition ON, verify the scan tool Driver Door Lock Sw. parameter is Inactive.
• If not the specified value, test the signal circuit terminal 15 for a short to ground. If the circuit tests normal, replace the K9 BCM.
3. Verify the scan tool Driver Door Unlock Sw. parameter is Inactive.
• If not the specified value, test the signal circuit terminal 5 for a short to ground. If the circuit tests normal, replace the K9 BCM.
4. If all circuits test normal, test or replace the S101 door lock/window switch.
Door Lock Switch Malfunction, Police Model
1. Ignition OFF, disconnect the X2 harness connector at the S101 door lock/window switch.
2. Disconnect the X2 harness connector at the S79P window switch-passenger.
3. Ignition ON, verify the scan tool Driver Door Lock Sw. parameter is Inactive.
• If not the specified value, test the signal circuit terminal 15 for a short to ground. If the circuit tests normal, replace the K9 BCM.
4. Verify the scan tool Driver Door Unlock Sw. parameter is Inactive.
• If not the specified value, test the signal circuit terminal 5 for a short to ground. If the circuit tests normal, replace the K9 BCM.
5. Ignition OFF, connect the X2 harness connector at the S101 door lock/window switch.
6. Ignition ON, observe the scan tool Driver Door Lock Sw. and Driver Door Unlock Sw. parameters while using the S101 door lock/window switch. The parameter should change between Inactive and Active.
• If the values do not change, test or replace the S101 door lock/window switch.
7. If all circuits test normal, test or replace the S79P window switch-passenger.
Component Testing
1. Ignition OFF, disconnect the X2 harness connector at the appropriate S101 door lock/window switch or the S79P window switch-passenger.
2. Test for infinite resistance between the signal terminals 5 and 15 and the ground terminal 4 with the switch in the open position.
• If less than the specified value, replace the switch.
3. Test for less than 2 ohms between the signal terminal 15 and the ground terminal 4 with the switch in the lock position.
• If greater than the specified range, replace the switch.
4. Test for less than 2 ohms between the signal terminal 5 and the ground terminal 4 with the switch in the unlock position.
• If greater than the specified range, replace the switch
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
* Power Mirror Switch Replacement (9C1) Service and Repair
* Control Module References Control Module References for BCM replacement, programming and setup