• | 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 |
---|---|---|---|---|
Rear Access Panel Relay B+ | 2 | 2 | -- | -- |
Right Access Panel Release Signal | 1, 2 | 1 | 1 | -- |
Left Access Panel Release Signal | 1, 2 | 1 | 1 | -- |
Underhood Interlock Relay Control | B312A 02 | B312A 05 | B312A 05 | -- |
LH Access Panel Relay Control | B250D 00 | B250D 00 | B250D 00 | -- |
RH Access Panel Relay Control | B250E 00 | B250E 00 | B250E 00 | -- |
Access Panel Latch Interlock Control | 2 | 2 | -- | -- |
RH Access Panel Latch Control | 2 | 2 | 2 | -- |
LH Access Panel Latch Control | 2 | 2 | 2 | -- |
Rear Access Panel Switch Ground | -- | 1 | 1 | -- |
Underhood Interlock Relay Ground | -- | 2 | 2 | -- |
1. Rear Access Panel Switch Inoperative. 2. Rear Access Panel Latch Inoperative. |
The body control module (BCM) monitors the signal from the rear access panel release switches. When the BCM detects a request for the rear panel to open, it will provide a ground for the appropriate rear access panel relay. This will energize the relay and cause it to supply voltage to the appropriate rear access panel latch.
The system voltage is 9-16 volts.
When the BCM detects a fault in the left access release panel relay control circuit.
When the BCM detects a fault in the right access release panel relay control circuit.
Rear access panels will malfunction
• | 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 |
Access Panel Description and Operation
Control Module References for scan tool information
Observe the operation of the left and right rear access panel while pressing the left and right access panel switch. The appropriate latch should release the rear access panel.
⇒ | 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 is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the BCM. |
⇒ | If the test lamp is always OFF, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the BCM. |
⇒ | 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 range, replace the relay. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for BCM replacement, setup and programming |