• | 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. |
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 | -- |
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The remote control door lock receiver (RCDLR), driver door module (DDM), passenger door module (PDM) and body control module (BCM) control the output functions of the power door latches. These output functions allow the RCDLR and BCM to command the power door latch motors to Unlatch.
When the RCDLR receives an input from one of the door handle switches, it checks the Lock/Unlock status of the door. If the status of the door is Unlock, the RCDLR applies the ground for the appropriate power door latch.
At the same time that the RCDLR is receiving its input, the DDM or PDM is also receiving the same input. When the DDM or PDM receives its input from the door handle switch, it checks the window indexing status of the door. If the window is below the index point, it sends a serial data message to the BCM to apply voltage for the appropriate power door latch. If the window is above the index point, it will first index the window, then send a serial data message to the BCM to apply voltage for the power door latch.
Battery voltage must be between 9-16 volts.
The RCDLR detects a short to voltage in the door latch enable control circuit for greater than 2 minutes.
The driver or passenger doors will not unlatch.
• | 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. |
If the DTC does not reset after the code is cleared, it may be that the door latch enable control circuit is shorted to voltage. If the voltage circuit that the door lock enable control circuit is shorted to is fused, then the fuse for the voltage circuit would open when a door handle switch is activated and the RCDLR pulls the door lock enable control circuit low. Check related systems for an open fuse.
Door Lock/Indicator Schematics
Power Door Latch Description and Operation
Control Module References for scan tool information
• | Driver door latch control terminal 4 |
• | Passenger door latch control terminal 9 |
⇒ | If greater than the specified range, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the RCDLR. |
• | Driver door latch control terminal 3 |
• | Passenger door latch control terminal 8 |
⇒ | If greater than the specified range, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the BCM. |
• | Driver door latch control terminal 3 |
• | Passenger door latch control terminal 8 |
• | Driver door latch control terminal 4 |
• | Passenger door latch control terminal 9 |
⇒ | If the function does not perform as specified, replace the door latch. |
⇒ | If the function does not perform as specified, replace the door latch. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for BCM or RCDLR replacement, setup, and programming |