Memory Seat Feature Inoperative

Memory Seat Feature 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 memory recall switch assembly on the driver's door provides inputs to the driver door module (DDM). Battery voltage is supplied to the memory recall switch assembly from the DDM. When a memory recall 1, 2, or EXIT switch is pressed, the switch contacts close the appropriate switch signal circuit to the battery voltage supply circuit within the memory recall switch assembly. When the DDM receives active switch signals from the memory recall switch assembly, the appropriate commands are sent to the memory seat module (MSM).

Reference Information
Schematic Reference

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

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

Memory Seats Description and Operation (Memory Seats Description and Operation)
Electrical Information Reference

* Circuit Testing (Circuit Testing)
* Connector Repairs (Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (Wiring Repairs)

Scan Tool Reference

Control Module References (Control Module References) for scan tool information

Circuit/System Verification

1. Verify the power seat operates in all directions from the seat adjuster switch.

• If the power seat does not operate normal, refer to Power Seat Switch Replacement (Power Seat Switch Replacement).

2. Ignition ON, observe the scan tool Memory Switch parameter while activating the memory 1, memory 2, and exit switch functions. The reading should change between Idle and the active switch function.

• If not the specified value, refer to Memory Seat Switch Component Test.

3. If the memory switch inputs to the DDM function normal, replace the MSM.

Component Testing

Memory Seat Switch Component Test
1. Ignition OFF, disconnect the X4 harness connector at the DDM.
2. Test for infinite resistance between each of the signal terminals 7 and 8 and the B+ terminal 5 with the switch in the open position.

• If not the specified value, replace the memory seat switch.

3. Test for less than 1.0 ohm between the signal terminal 8 and the B+ terminal 5 with the Memory 1 button pressed and the Exit button pressed.

• If greater than the specified range, replace the memory seat switch.

4. Test for less than 1.0 ohm between the signal terminal 7 and the B+ terminal 5 with the Memory 2 button pressed and the Exit button pressed.

• If greater than the specified range, replace the memory seat switch.

5. If the memory seat switch tests normal, replace the DDM.

Repair Instructions

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

* Driver Seat Adjuster Memory Switch Replacement (Removal and Replacement)
* Control Module References (Control Module References) for DDM or MSM replacement, programming, and setup