• | 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 Module B+ | U0199 00 | U0199 00 | -- | -- |
Front Passenger Door Module B+ | U0200 00 | U0200 00 | -- | -- |
Driver Door Latch Control | 1 | 1 | 1 | -- |
Passenger Door Latch Control | 2 | 2 | 2 | -- |
Door Lock Relay Control | B3135 00 | B3135 00 | B3135 00 | -- |
Door Unlock Relay Control | B3130 00 | B3130 00 | B3130 00 | -- |
Rear Door Latch Control | 3,4 | 3,4 | 3,4 | -- |
Door Lock/Unlock Relay Ground | -- | 3,4 | 3,4 | -- |
Driver Door Module Ground | -- | U0199 00 | 1 | -- |
Front Passenger Door Module Ground | -- | U0200 00 | 2 | -- |
1. Driver Door Latch Malfunction 2. Passenger Door Latch Malfunction 3. Rear Door Unlock Inoperative 4. Rear Door Lock Inoperative |
The driver and front passenger power door lock switches are integral components of the driver door module (DDM) and front passenger door module (PDM). The switches consist of 2 positions, lock and unlock, and are in the normally open state. When placed in either the lock or unlock positions, the switches provide a direct input to their respective door control module. When a power door lock switch is operated to the lock or unlock position, the associated door control module responds by sending a serial data message indicating a change in the switch's position. This serial data message is received by the opposite door control module as well as the body control module (BCM). The DDM and PDM respond to the lock/unlock request by activating their associated power door lock motors to the appropriate direction to lock or unlock the front doors. The BCM is responsible for controlling the left and right rear passenger door lock motors. The BCM, upon receipt of a lock or unlock serial data signal, will control either the rear door lock or unlock relay. When the appropriate door lock relay is energized, the rear power door lock motors will lock or unlock the rear doors.
Door Lock/Indicator Schematics
Power Door Latch Description and Operation
Control Module References for scan tool information
⇒ | If a front door does not perform the LOCK or UNLOCK function, refer to Front Door Lock Malfunction. |
⇒ | If a rear door does not LOCK or UNLOCK, refer to Rear Door Lock Malfunction. |
⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
⇒ | If the test lamp does not illuminate, test the B+ circuit for a short to ground or open/high resistance. If the circuit tests normal and the door module fuse is open, replace the door module. |
• | Driver door latch control circuit terminal 2 |
• | Driver door latch control circuit terminal 3 |
• | Front passenger door latch control circuit terminal 5 |
• | Front passenger door latch control circuit terminal 6 |
⇒ | If greater than the specified range, test the control circuit for a short to voltage or an open/hign resistance. If the circuit tests normal, replace the door module. |
• | Driver door latch control circuit terminal 2 and control circuit terminal 3 |
• | Front passenger door latch control circuit terminal 5 and control circuit terminal 6 |
⇒ | If the test lamp is always OFF during either of the commands, test either control circuit for a short to ground. If the circuits test normal, replace the door module. |
⇒ | If greater than the specified range, test the ground circuit for a short to voltage or an open/high resistance. |
• | B+ circuit terminal 86 |
• | B+ circuit terminal 87 |
⇒ | If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance |
⇒ | If the test lamp does not illuminate, 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 continuously illuminates, test the control circuit for a short to ground. If the circuit tests normal, replace the BCM. |
• | Ground circuit terminal 85 |
• | Ground circuit terminal 87A |
⇒ | If greater than the specified range, test the ground circuit for a short to voltage or an open/high resistance. |
⇒ | If the test lamp does not illuminate, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM. |
⇒ | If the test lamp continuously illuminates, test the control circuit for a short to voltage. If the circuit tests normal, replace the BCM. |
• | LR door latch control circuit terminal 2 |
• | RR door latch control circuit terminal 5 |
⇒ | 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, test or replace the UNLOCK relay. |
• | LR door latch control circuit terminal 3 |
• | RR door latch control circuit terminal 6 |
⇒ | 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, test or replace the LCK relay. |
• | LR door latch control circuit terminal 2 |
• | RR door latch control circuit terminal 5 |
⇒ | If the test lamp does not illuminate, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, test or replace the UNLOCK relay. |
⇒ | If the test lamp continuously illuminates, test the control circuit for a short to voltage. If the circuit tests normal, test or replace the UNLOCK relay. |
• | LR door latch control circuit terminal 3 |
• | RR door latch control circuit terminal 6 |
⇒ | If the test lamp does not illuminate, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, test or replace the LCK relay. |
⇒ | If the test lamp continuously illuminates, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, test or replace the LCK relay. |
⇒ | If not within the specified range, replace the relay. |
• | 30 and 86 |
• | 30 and 87 |
• | 30 and 85 |
• | 85 and 87 |
⇒ | If not the specified value, replace the relay. |
⇒ | If greater than the specified value, replace the relay. |
⇒ | If greater than the specified value, replace the relay. |
• | Driver door latch control terminal 3 |
• | Passenger door latch control terminal 5 |
• | Left rear door latch control terminal 3 |
• | Right rear door latch control terminal 6 |
• | Driver door latch control terminal 4 |
• | Passenger door latch control terminal 6 |
• | Left rear door latch control terminal 2 |
• | Right rear door latch control terminal 5 |
⇒ | 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, DDM, or PDM replacement, setup, and programming |