Test H: The Memory Seat Is Inoperative

PINPOINT TEST H: THE MEMORY SEAT IS INOPERATIVE

H1-H2:

H3-H5:

H5-H6:

H6 Continued:

H7-H8:

H9-H11:

H11-H12:

H13-H14:

H15-H17:

H17-H18:

H19-H20:

H21-H22:

H23-H24:

H25:

NOTE: Before carrying out diagnostic testing for the driver seat module (DSM), wake the module by activating the power seat using the seat control switch, otherwise module communication failure will occur.

Normal Operation
The driver seat control switch is powered by battery voltage on circuit 1567 (RD/LB). When pressed, the seat control switch supplies the voltage to the driver seat module (DSM). The DSM then supplies voltage and ground to the appropriate power seat track motor based on the inputs received from the seat control switch. When pressed in the opposite direction, the seat control switch reverses the polarity to the DSM, which moves the seat in the opposite direction. There are 3 power seat track motors that combine to move the seat horizontally (FORWARD/REVERSE) and vertically (front UP/DOWN and rear UP/DOWN).

The pinpoint test diagnoses a memory seat that does not operate in one or more directions when using the seat control switch. If the memory seat moves in all directions using the seat control switch, GO to Pinpoint Test I. Test I: The Memory Seat Does Not Operate Correctly - Does Not Operate Using the Memory Set Switch

Possible Causes
An inoperative memory seat can be caused by:
- an open fuse.
- faulty wiring, terminals or connectors.
- a faulty seat control switch.
- a faulty seat track motor (seat track).
- a faulty DSM.