Circuit Description
The rear compartment lid release circuit is completed by the BCM when it receives a truck release request from the RCDLR trunk release button and the vehicle is in the PARK position. The BCM momentarily grounds circuit 253 energizing the rear compartment lid release relay.
Conditions for Setting the DTC
| • | The BCM detects a short to B+ in circuit 253 while attempting to ground circuit 253. |
| • | The BCM test for a short to B+ in circuit 253 only when attempting to release the rear compartment . |
| • | All conditions must be present for more than 0.15 seconds. |
Action Taken When the DTC Sets
| • | The BCM stores DTC B3268 in memory. |
| • | The BCM turns off its output to the rear compartment lid release. |
Conditions for Clearing the DTC
| • | When the ignition switch is cycled from off to on, the current DTC is cleared. If the fault is present at the next trunk release activation, this DTC sets as current. |
| • | A history DTC will clear after 100 consecutive ignition cycles if the condition for the malfunction is no longer present. |
| • | Using a scan tool. |
Diagnostic Aids
| • | The following conditions may cause an intermittent malfunction to occur: |
| - | An intermittent short to B+ in circuit 253. |
| - | The BCM is shorted to B+ internally. |
| - | The rear compartment lid release relay coil is shorted to B+ internally. |
| • | If the DTC is a history DTC, the problem may be intermittent. Try performing the tests shown while moving wiring and connectors, this can often cause the malfunction to reappear. |
| • | DTC P1626 will set in the Powertrain Control Module (PCM) when the ignition switch is on with the Body Control module (BCM) disconnected. When BCM diagnostics and repairs are completed, refer to Powertrain On Board Diagnostic (OBD) System Check in Engine Controls for additional information on PCM related DTCs. |
Test Description
The number(s) below refer to the step number(s) on the diagnostic table.
-
This step checks for short to B+ in circuit 253.
-
The step determines whether the circuit 253 has a short to B+ or the BCM is faulty.
-
This step checks BCM DTC B3268 and checks for BCM DTC B3268 to set again.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Was the BCM Diagnostic System Check performed? | -- | Go to Step 2 | |
Is the test light on? | -- | Go to Step 3 | Go to Step 4 | |
Is the test light on? | -- | Go to Step 5 | Go to Step 6 | |
4 | Replace the rear compartment lid release relay. Is the repair complete? | -- | Go to Step 9 | -- |
5 | Repair a short to B+ in circuit 253. Is the repair complete? | -- | Go to Step 9 | -- |
Does BCM DTC B3268 reset as a current DTC? | -- | Go to Step 7 | -- | |
7 |
Is the repair complete? | -- | Go to Step 9 | -- |
8 | The malfunction is not present. Refer to Diagnostic Aids for additional information regarding DTC. Is the repair complete? | -- | Go to Step 9 | -- |
9 |
Are there current BCM DTCs set? | -- | System OK |
