Schematic Reference: Driver Seat Schematics

Connector End View Reference: Power Seat Connector End Views

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

Operate the front vertical adjuster switch in the upward and downward directions.

Does the front vertical adjuster motor operate normally?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

1. Install a scan tool.
2. Observe the Front Vertical Position Switch parameter in the seat module Inputs/Outputs data list.
3. Operate the front vertical adjuster switch in the upward direction.

Does the scan tool display the correct switch status parameter in relation to the actual switch position?

Go to Step 4

Go to Step 5

Operate the front vertical adjuster switch in the downward direction.

Does the scan tool display the correct switch status parameter in relation to the actual switch position?

Go to Step 7

Go to Step 6

1. Disconnect the seat adjuster switch connector.
2. Connect a 3-amp fused jumper wire between the battery voltage supply circuit terminal and the front vertical upward switch signal circuit terminal in the harness connector.
3. Observe the Front Vertical Position Switch parameter in the seat module Inputs/Outputs data list.

Does the scan tool display the Front Vertical Position Switch parameter as upward?

Go to Step 12

Go to Step 8

1. Disconnect the seat adjuster switch connector.
2. Connect a 3-amp fused jumper wire between the battery voltage supply circuit terminal and the front vertical downward switch signal circuit terminal in the harness connector.
3. Observe the Front Vertical Position Switch parameter in the seat module Inputs/Outputs data list.

Does the scan tool display the Front Vertical Position Switch parameter as downward?

Go to Step 12

Go to Step 9

1. Disconnect the front vertical adjuster motor control circuit connector.
2. Connect a test lamp between the control circuit terminals in the harness connector.
3. Operate the front vertical adjuster switch in both directions.

Does the test lamp illuminate in the upward and downward switch positions only?

Go to Step 11

Go to Step 10

Test the front vertical upward switch signal circuit for an open or short to ground. Refer to Circuit Testing and to Wiring Repairs.

Did you find and correct the condition?

Go to Step 17

Go to Step 13

Test the front vertical downward switch signal circuit for open or short to ground. Refer to Circuit Testing and to Wiring Repairs.

Did you find and correct the condition?

Go to Step 17

Go to Step 13

Test the front vertical adjuster motor control circuits for an open or short to ground. Refer to Circuit Testing and to Wiring Repairs .

Did you find and correct the condition?

Go to Step 17

Go to Step 13

Inspect for poor connections at the front vertical adjuster motor. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs.

Did you find and correct the condition?

Go to Step 17

Go to Step 14

Inspect for poor connections at the seat adjuster switch. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs.

Did you find and correct the condition?

Go to Step 17

Go to Step 15

Inspect for poor connections at the seat module. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs.

Did you find and correct the condition?

Go to Step 17

Go to Step 16

Replace the front vertical adjuster motor. Refer to Power Seat Adjuster Mechanism Replacement .

Is the repair complete?

Go to Step 17

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Replace the seat adjuster switch. Refer to Power Seat Switch Replacement .

Is the repair complete?

Go to Step 17

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Replace the seat module. Refer to Control Module References for replacement, setup, and programming.

Is the repair complete?

Go to Step 17

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Operate the system to verify the repair.

Did you correct the condition?

System OK

Go to Step 2