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 Descriptor
DTC B3130 00: All Door Unlock CircuitDiagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Driver Door Module B+ | U0199 00 | U0199 00 | -- | -- |
I/P Fuse Block B+ | 3, 4 | 3, 4 | -- | -- |
Passenger Door Module B+ | U0200 00 | U0200 00 | -- | -- |
Driver Door Latch Control | 1 | 1 | 1 | -- |
Passenger Door Latch Control | 2 | 2 | 2 | -- |
Lock/Unlock PCB Relay Control | B3130 00 or B3135 00 | B3130 00 or B3135 00 | B3130 00 or B3135 00 | -- |
Rear Door Latch Control | 3, 4 | 3, 4 | 3, 4 | -- |
I/P Fuse Block Ground | -- | 3, 4 | 3, 4 | -- |
1. Driver Door Latch Malfunction 2. Passenger Door Latch Malfunction 3. Rear Door Unlock Inoperative 4. Rear Door Lock Inoperative | ||||
Circuit/System Description
The body control module (BCM) energizes the unlock relay coil through a low side drive control circuit. When the BCM receives an unlock message the door unlock relay control circuit is grounded energizing the unlock relay coil.
Conditions for Running the DTC
| • | Battery voltage is between 9-16 volts. |
| • | The BCM has attempted to energize the unlock relay. |
Conditions for Setting the DTC
The BCM has detected a fault in the door lock relay control circuit.
Action Taken When the DTC Sets
The BCM will not attempt unlock operation.
Conditions for Clearing the DTC
| • | This 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 Locks Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
Command the rear doors lock to LOCK and UNLOCK with a scan tool, the doors should perform the LOCK and UNLOCK function.
Circuit/System Testing
- Ignition OFF, disconnect the X3 harness connector at the I/P fuse block.
- Connect a test lamp between the control circuit terminal A3 and B+.
- Ignition ON, command the doors to UNLOCK with a scan tool, the test lamp should illuminate during the UNLOCK command.
- If the circuit tests normal, replace the I/P fuse block.
| ⇒ | 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. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for BCM replacement, programming, and setup |
