• | 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 |
---|---|---|---|---|
Door Lock/Unlock Relay B+ | 1 | 1 | -- | -- |
Driver Door Lock Switch Lock Signal | B3150 00 | B3150 00 | B3150 00 | -- |
Driver Door Lock Switch Unlock Signal | B3140 00 | B3140 00 | B3140 00 | -- |
Passenger/Cargo Door Lock Switch Lock Signal | B3155 00 | B3155 00 | B3155 00 | -- |
Passenger/Cargo Door Lock Switch Unlock Signal | B3145 00 | B3145 00 | B3145 00 | -- |
Passenger/Cargo Unlock Relay Control | B3130 00 | B3130 00 | B3130 00 | -- |
Driver Unlock Relay Control | B3125 00 | B3125 00 | B3125 00 | -- |
Door Lock Relay Control | B3135 00 | B3135 00 | B3135 00 | -- |
Cargo Unlock Relay Control | 2 | 2 | 2 | -- |
Door Lock Switch Ground | -- | 3 | 3 | -- |
Door Lock/Unlock Relay Ground | -- | 1 | 1 | -- |
1. All Latches Malfunction 2. Cargo Door Latch Malfunction 3. Door Lock Switch Malfunction |
The body control module (BCM), upon receipt of a cargo unlock command from the remote keyless entry (RKE), will switch the CARGO UNLCK relay control circuit to battery positive voltage. This will energize the CARGO UNLCK relay activating the cargo door latch.
An UNLOCK command from the RKE.
The BCM detects a fault in the relay control circuit while commanding the CARGO UNLCK relay.
The cargo door will not unlock from the RKE.
• | 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. |
The cargo door latch will still continue to function normally from the driver, passenger or cargo door lock switch.
Door Lock/Indicator Schematics
Power Door Locks Description and Operation
Control Module References for scan tool information
Command the cargo door to UNLOCK by pressing the cargo button on the RKE, the cargo door should perform the UNLOCK function.
⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
⇒ | If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the BCM. |
⇒ | If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for BCM replacement, setup and programming |