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 Descriptors
DTC B3142: Driver Unlock Switch Circuit LowDTC B3152: Driver Lock Switch Circuit Low
Diagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Driver Door Latch Control | 1 | 1 | B2517 | -- |
Driver Door Latch Enable Control | 1 | 1 | B2517 | -- |
Front Passenger Door Latch Control | 1 | 1 | B2518 | -- |
Front Passenger Door Latch Enable Control | 1 | 1 | B2518 | -- |
Driver Door Lock Switch Lock Signal | B3152 | 2 | 2 | -- |
Driver Door Lock Switch Unlock Signal | B3142 | 2 | 2 | -- |
Left Front Exterior Door Handle Switch Signal | B3849 | 1 | 1 | -- |
Left Front Interior Door Handle Switch Signal | B3848 | 1 | 1 | -- |
Passenger Door Lock Switch Lock Signal | B3155 | 2 | 2 | -- |
Passenger Door Lock Switch Unlock Signal | B3145 | 2 | 2 | -- |
Right Front Exterior Door Handle Switch Signal | B1474 | 1 | 1 | -- |
Right Front Interior Door Handle Switch Signal | B2981 | 1 | 1 | -- |
Driver Exterior Door Handle Switch Ground | -- | 1 | 1 | -- |
Driver Interior Door Handle Switch Ground | -- | 1 | 1 | -- |
Passenger Exterior Door Handle Switch Ground | -- | 1 | 1 | -- |
Passenger Interior Door Handle Switch Ground | -- | 1 | 1 | -- |
Driver Door Lock Switch Ground | -- | 2 | 2 | -- |
Passenger Door Lock Switch Ground | -- | 2 | 2 | -- |
| ||||
Circuit/System Description
The driver door lock switch lock and unlock signal circuits provide inputs to the driver door switch when the driver door lock switch is activated to the Lock or Unlock position. These inputs allow the driver door switch to detect a door Lock or Unlock request. The driver door switch provides power to the driver door lock switch. When the driver door switch detects low voltage on a signal circuit, the driver door switch will send a serial data message to the remote control door lock receiver (RCDLR) to enter the power door latches in Lock or Unlock status. The driver door switch monitors the signal circuits to determine how long the ground has been applied.
Conditions for Running the DTC
Battery voltage must be between 9-16 volts.
Conditions for Setting the DTC
The driver door switch detects a short to ground on the driver door lock switch lock or unlock signal circuit for greater than 30 seconds.
Actions Taken When the DTC Sets
The driver door 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 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 Latch Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
Ignition ON, observe the scan tool Door Lock Switch parameter while using the driver door lock switch. The parameter should change from Idle to Lock and Unlock when changing between the commanded states.
Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the driver door lock switch.
- Verify that a test lamp illuminates between B+ and the ground circuit terminal C.
- Ignition ON, verify the scan tool Door Lock Switch parameter is Idle.
- If all circuits test normal, test or replace the driver door lock switch.
| ⇒ | If the test lamp does not illuminate, test the ground circuit for an open/high resistance. |
| ⇒ | If not the specified value, test the signal circuit listed below for a short to ground. If the circuit tests normal, replace the driver window switch. |
| • | Signal circuit terminal D |
| • | Signal circuit terminal E |
Component Testing
- Ignition OFF, disconnect the harness connector at the driver door lock switch.
- Test for infinite resistance between the signal terminals D and E and the ground terminal C with the switch in the open position.
- Test for less than 2 ohms between the signal terminal E and the ground terminal C with the switch in the unlock position.
- Test for less than 2 ohms between the signal terminal D and the ground terminal C with the switch in the lock position.
| ⇒ | If less than the specified value, replace the driver door lock switch. |
| ⇒ | If greater than the specified range, replace the driver door lock switch. |
| ⇒ | If greater than the specified range, replace the driver door lock switch. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
