Midgate Latch Release Inoperative

Midgate Latch Release Inoperative

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Diagnostic System Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Strategy Based Diagnosis) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Diagnostic Procedure Instructions)provides an overview of each diagnostic category.



Diagnostic Fault Information






Circuit/System Description

The midgate latch release switches are a single input to the midgate module. The latch release switch signal circuit is referenced from battery voltage from the midgate module. When a latch release switch is pressed, the switch contacts close the signal circuit to ground. When the midgate module receives an active release switch signal, battery voltage is applied to the midgate latches through the midgate latch control circuit.


Diagnostic Aids

To open the midgate when the power latch release is inoperative refer to Opening the Midgate Without Electrical Power () .


Reference Information
Schematic Reference

Release Systems Schematics (Release Systems Schematics)
Connector End View Reference

Component Connector End Views (Component Connector End Views)
Description and Operation

Midgate Description and Operation ()
Electrical Information Reference

* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)

Scan Tool Reference

Programming and Relearning (Programming and Relearning)for scan tool information


Circuit/System Verification

Midgate window down, verify the midgate unlatches using the midgate latch release switches.

If the midgate does not unlatch from 1 switch only, refer to Midgate Latch Release Switch Circuit Test.


If the midgate does not release from 1 latch only, refer to Midgate Latch Circuit Test.


If both latches will not release using either release switch, refer to Midgate Module Circuit Test.



Circuit/System Testing


Midgate Latch Release Switch Circuit Test
1. Ignition OFF, disconnect the harness connector at the affected latch release switch.
2. Test for less than 1.0 ohm of resistance between the ground circuit terminal B and ground.

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

3. Install a 3A fused jumper wire between the signal circuit terminal A and the ground circuit terminal B. Verify the latches activate.

• If the latches do not activate, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the midgate module.

4. If all circuits test normal, test or replace the latch release switch.



Midgate Latch Circuit Test
1. Ignition OFF, disconnect the harness connector at the affected latch.
2. Test for less than 1.0 ohm of resistance between the ground circuit terminal E and ground.

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

3. Connect a test lamp between the control circuit terminal D and the ground circuit terminal E.
4. Press and release a midgate latch release switch. The test lamp should flash ON.

• If the test lamp does not flash ON, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the midgate module.

5. If all circuits test normal, test or replace the latch.



Midgate Module Circuit Test
1. Ignition OFF, disconnect the harness connector at a latch release switch.
2. Ignition ON, verify battery voltage is present at the switch signal circuit terminal A.

• If not the specified value test the switch signal circuit for an open/high resistance or short to ground. If the circuit tests normal replace the midgate module.

3. Connect the harness connector at the latch release switch.
4. Disconnect the harness connector at a latch.
5. Connect a test lamp between the control circuit terminal D and the ground circuit terminal E.
6. Press and release a midgate latch release switch. The test lamp should flash ON.

• If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the midgate module.


• 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 midgate module.




Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

* Midgate Latch Replacement ()
* Midgate Latch Switch Replacement ()
* Midgate Window Regulator Module Motor Replacement (Service and Repair)