Sit-N-Lift Mobility Seat Does Not Enter Diagnostic Mode

Sit-N-Lift Mobility Seat Does Not Enter Diagnostic Mode

Diagnostic Instructions

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

Diagnostic Fault Information





Circuit/System Description

The sit-n-lift seat module monitors the door ajar switch signal circuit to determine when to enter and exit diagnostic mode. To enter or exit diagnostic mode, the right rear sliding door ajar switch must be pressed 5 times within 4 seconds.

Reference Information
Schematic Reference

Rear Seat Schematics (Rear Seat Schematics)
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

Sit-N-Lift Mobility Seat Description and Operation (Sit-N-Lift Mobility Seat 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)

Circuit/System Verification

1. Ignition ON, verify the door ajar indicator turns ON and OFF while opening and closing the right rear sliding door.

• If the door ajar indicator does not operate as specified, Refer to Door Ajar Indicator Malfunction (Door Ajar Indicator Malfunction).

2. Open the right rear sliding door. Press the door ajar switch 5 times within 4 seconds. Verify the sit-n-lift seat module enters diagnostic mode.

Circuit/System Testing

1. Ignition OFF, disconnect the X1 harness connector at the sit-n-lift seat module.
2. Right rear sliding door closed, test for infinite resistance between the signal circuit terminal 12 and ground.

• If less than the specified value, test the signal circuit for a short to ground.

3. Right rear sliding door open, test for less than 10 ohms between the signal circuit terminal 12 and ground.

• If greater than the specified range, test the signal circuit for a short to ground.

4. If all circuits test normal, replace the sit-n-lift seat module.

Repair Instructions

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

Control Module References (Programming and Relearning) for sit-n-lift seat module replacement, programming, and setup