Test I

PINPOINT TEST I: THE MEMORY SEAT DOES NOT OPERATE CORRECTLY - DOES NOT OPERATE USING THE MEMORY SET SWITCH

Test I1-I3:

Test I4-I6:

Test I6-I7:

Test I8-I10:

Test I10-I12:

Test I12-I13:

Test I14-I16:

Test I16-I18:

Test I18-I19:

Normal Operation

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

The driver power seat switch is powered by battery voltage on circuit 1567 (RD/LB). When pressed, the power seat 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 power seat switch reverses the polarity to the DSM, which moves the seat in the opposite direction. There are three power seat track motors that combine to move the seat horizontally (forward/reverse) and vertically (front up/down and rear up/down).

Each power seat track motor includes a position sensor, which is a potentiometer. The DSM supplies a shared reference voltage and ground to each position sensor. This enables the position sensor to send a variable voltage back to the DSM to indicate the position of the power seat track motor. The DSM uses this information to return the seat to a stored preprogrammed position when pressing the memory set switch or a remote transmitter. Refer to Seats and the owner's literature for additional information on programming the DSM for storing memory seat, adjustable pedal, and adjustable mirror positions.

The following pinpoint test diagnoses a memory seat that does not operate correctly using the memory set switch. If the memory seat does not move in all directions using the power seat switch, GO to Pinpoint Test H. Test H

Possible Causes
A memory seat that does not operate correctly can be caused by:
- fuse.
- wiring, terminals, or connectors.
- a faulted memory set switch.
- a faulted power seat track motor position sensor.
- a faulted DSM.
- a faulted smart junction box (SJB).