Driver Seat Horizontal Movement Inoperative

Possible Causes are:

• SEAT HORIZONTAL FORWARD DRIVER WIRE OPEN
• SEAT HORIZONTAL FORWARD SWITCH SENSE WIRE OPEN
• SEAT HORIZONTAL REARWARD DRIVER WIRE OPEN
• SEAT HORIZONTAL REARWARD SWITCH SENSE WIRE OPEN
• DRIVER HORIZONTAL MOTOR INOPERATIVE
• DRIVER POWER SEAT SWITCH
• MSM HORIZONTAL MOTOR OUTPUT OPEN
• MSM HORIZONTAL SWITCH INPUT OPEN

1. Using the DRBIII(R), select: Body, Memory Seat Module Actuators. Actuate the Horizontal Motor Forward and then Rearward. Did the Horizontal Motor operate in both directions? If yes, go to next step. If no, go to step  6 .
2. Turn ignition off. Remove seat to gain access to the connectors. Disconnect the Seat Module C1 connector. Disconnect the Driver Power Seat Switch connector. Measure the resistance of the Seat Horizontal Forward Switch Sense circuit between the Seat Module connector and the Seat Switch connector. Is the resistance less than 5 ohms? If yes, go to next step. If no, repair the open Seat Horizontal Forward Switch Sense wire. Perform MEMORY SYSTEM VERIFICATION TEST  under VERIFICATION TESTS.
3. Turn ignition off. Remove seat to gain access to the connectors. Disconnect the Seat Module C1 connector. Disconnect the Driver Power Seat Switch connector. Measure the resistance of the Seat Horizontal Rearward Switch Sense circuit between the Seat Module connector and the Seat Switch connector. Is the resistance less than 5 ohms? If yes, go to next step. If no, repair the open Seat Horizontal Rearward Switch Sense wire. Perform MEMORY SYSTEM VERIFICATION TEST  under VERIFICATION TESTS.
4. Ensure the Driver Power Seat Switch is fully connected. Disconnect the Seat Module C1 connector. Connect a test light between the Seat Horizontal Forward Switch Sense circuit and the Seat Horizontal Rearward Switch Sense circuit in the Seat Module connector. Move the Seat Horizontal Switch to the Forward and then the Rearward positions and observe the test light. Did the test light illuminate when the switch was moved in both directions. If yes, go to next step. If no, replace the driver power seat switch. Perform MEMORY SYSTEM VERIFICATION TEST  under VERIFICATION TESTS.
5. If there are no possible causes remaining, replace the Memory Seat Module. Perform MEMORY SYSTEM VERIFICATION TEST  under VERIFICATION TESTS.
6. Remove the seat and gain access to the connectors. Disconnect the Seat Module C2 connector. Disconnect the driver power Seat Horizontal Motor connector. Measure the resistance of the Seat Horizontal Forward Driver circuit between the Seat Module connector and the seat horizontal motor connector. Is the resistance less than 5 ohms? If yes, go to next step. If no, repair the open Seat Horizontal Forward Driver wire. Perform MEMORY SYSTEM VERIFICATION TEST  under VERIFICATION TESTS.
7. Turn ignition off. Remove seat to gain access to the connectors. Disconnect the Seat Module C2 connector. Disconnect the driver power seat horizontal motor connector. Measure the resistance of the Seat Horizontal Rearward Driver circuit between the Seat Module connector and the seat horizontal motor connector. Is the resistance less than 5 ohms? If yes, go to next step. If no, repair the open Seat Horizontal Rearward Driver wire. Perform MEMORY SYSTEM VERIFICATION TEST  under VERIFICATION TESTS.
8. Remove the seat and gain access to the connectors. Disconnect the Seat Module C2 connector. Ensure the Seat Horizontal Motor connector is connected. Connect a jumper wire from the Seat Horizontal Forward Driver circuit to the Ground circuit in the Seat Module C2 connector. Connect a jumper wire to the Seat Horizontal Rearward Driver circuit and momentarily touch it to the Fused B (+) circuit. Reverse the Ground and Fused B (+) jumper wires momentarily to run the motor in the opposite direction. Did the Seat Horizontal Motor run in both directions. If yes, go to next step. If no, replace the seat track assembly. Perform MEMORY SYSTEM VERIFICATION TEST  under VERIFICATION TESTS.
9. If there are no possible causes remaining, replace the Memory Seat Module. Perform MEMORY SYSTEM VERIFICATION TEST  under VERIFICATION TESTS.