Circuit Description
The memory seat module controls the driver seat horizontal adjuster motor by providing voltage and ground to the adjuster motor supply circuits. The direction of seat adjustment is determined by the polarity of the adjuster motor supply circuits. The memory seat module uses position sensors for storing and recalling memory seat position settings. The position sensor is an internal part of the horizontal adjuster motor. The memory seat module provides a 5 volt reference and low reference to the horizontal position sensor, and monitors the horizontal position sensor signal circuit which varies from 0 to 5 volts depending on the seat position.
Conditions for Setting the DTC
DTC 11 will set if:
| • | The driver seat horizontal adjuster motor position sensor signal voltage is not within 0.1 to 4.9 volts. |
| • | The horizontal adjuster motor or supply circuits are open or shorted. |
| • | The memory seat module is faulty. |
Action Taken When the DTC Sets
DTC 11 will set, and the seat horizontal adjuster motor memory operation will be disabled.
Conditions for Clearing the DTC
DTC 11 will be stored as a history code when the fault is no longer present.
Diagnostic Aids
| • | Inspect for mechanical conditions which may prevent the horizontal adjuster motor from operating properly. |
| • | Inspect the connectors at the memory seat module for damage or poor terminal connections. |
Test Description
The following numbers refer to the step numbers on the diagnostic table:
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you perform the Power Seat Diagnostic System Check? | -- | Go to Step 2 | |
Attempt to operate the horizontal adjuster motor. Does the seat move forward and back? | -- | Go to Step 3 | Go to Step 7 | |
3 |
Does the voltage remain within the specified values? | 0.1-4.9 V | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 4 |
4 |
Is the resistance within the specified values? | 8K-12K ohms | Go to Step 5 | Go to Step 6 |
5 | Measure the resistance through the position sensor from the 5 volt reference circuit terminal to the signal circuit terminal. Refer to Circuit Testing in Wiring Systems. Is the resistance within the specified values? | 1K-10K ohms | Go to Step 10 | Go to Step 6 |
6 | Inspect and repair any damage to the position sensor circuits and connector terminals. Refer to Wiring Repairs and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 11 | Go to Step 9 |
7 |
Does the motor operate properly in both directions? | -- | Go to Step 10 | Go to Step 8 |
8 | Inspect and repair any damage to the adjuster motor supply circuits and connector terminals. Refer to Wiring Repairs and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 11 | Go to Step 9 |
9 | Replace the horizontal adjuster motor. Refer to Seat Adjuster Motor Replacement - Power . Is the repair complete? | -- | Go to Step 11 | -- |
10 | Replace and program the memory seat module. Refer to Memory Seat Control Module Replacement and Memory Seat Control Module Programming . Is the repair complete? | -- | Go to Step 11 | -- |
11 |
Does the DTC reset? | -- | Go to Step 2 | System OK |
