Orlando

DTC B3618

When the ignition is ON, the body control module (BCM) supplies a 12 V signal to the exterior rear compartment lid unlatch switch through the liftgate release switch signal circuit. When the exterior rear compartment lid release switch is pressed, the voltage within the signal circuit is pulled low and in response, the BCM will energize the liftgate release relay.

The system voltage is 9-16 V.

The BCM detects a short to ground in the exterior rear compartment lid release switch signal circuit for greater than 60 seconds

The BCM ignores the input from the exterior rear compartment lid unlatch switch.

Schematic Reference

Release Systems Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Rear Hatch/Gate Description and Operation

Electrical Information Reference

Scan Tool Reference

Control Module References for scan tool information

Ignition ON, observe the scan tool Boot Lid/Tailgate Window Exterior Unlatch Switch parameter while pressing and releasing the S58A rear compartment lid unlatch switch-exterior. The parameter should change between Active and Inactive.

1. Ignition OFF, disconnect the harness connector at the S58A rear compartment lid unlatch switch-exterior.
2. Test for less than 10 Ω between the ground circuit terminal 1 and ground:

⇒	If greater than the specified range, test the ground circuit for an open/high resistance.

3. Ignition ON, verify the scan tool Boot Lid/Liftgate Window Exterior Unlatch Switch parameter is Inactive.

⇒	If not the specified value, test the signal circuit terminal 2 for a short to ground. If the circuit tests normal, replace the K9 BCM.

4. Install a 3 A fused jumper wire between the signal circuit terminal 2 and ground. Verify the scan tool Boot Lid/Liftgate Window Exterior Unlatch Switch parameter is Active.

⇒	If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K9 BCM.

5. If all circuits test normal, test or replace the S58A rear compartment lid unlatch switch-exterior.

Liftgate Release Switch

1. Ignition OFF, disconnect the harness connector at the S58A rear compartment lid unlatch switch-exterior.
2. Test for infinite resistance between terminal 2 and terminal 1 with the switch in the open position.

⇒	If not the specified value, replace the S58A rear compartment lid unlatch switch-exterior.

3. Test for less than 2 Ω between terminal 2 and terminal 1 with the switch in the closed position.

⇒	If greater than the specified range, replace the S58A rear compartment lid unlatch switch-exterior.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.