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Pinpoint Test A : The Power Seat Is Inoperative/Does Not Operate Correctly - Driver: Notes

NOTE: Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the pinpoint test.
NOTE: Use the correct probe adapter(s) from the Flex Probe Kit when taking measurements. Failure to use the correct probe adapter(s) may damage the connector.

Refer to DIAGNOSIS AND TESTING Inspection and Verification, DTC Charts and the Symptom Chart in DIAGNOSIS AND TESTING for direction to the appropriate pinpoint test.

Pinpoint Test A: The Power Seat Is Inoperative/Does Not Operate Correctly - Driver 

Refer to Wiring Diagrams Memory Seats for schematic and connector information.

Refer to Wiring Diagrams Component Testing for component testing.

Normal Operation 

The seat control switch supplies voltage and ground to the applicable Driver Seat Module (DSM) inputs. The DSM then supplies voltage and ground the appropriate seat track motor or seat recliner motor to move the seat in the desired direction. There are 3 seat track motors that combine to move the seat horizontally (forward/rearward) and vertically (front up/down and rear up/down). The seat recliner mechanism uses a single motor to pivot the seat backrest forward and rearward.

Each motor in the memory seat track and recliner contain a Hall-effect position sensor. The DSM supplies a shared signal feed circuit to each sensor. Each position sensor sends a signal pulse back to the DSM to monitor the position of the power seat and seat backrest. The DSM uses this information to return the seat to a stored pre-programmed position when pressing the memory SET switch or a Remote Keyless Entry (RKE). For information on programming memory positions or recalling a stored memory position, refer to Memory Position Programming in this service information.

The following 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, but does not operate using the memory SET switch, GO to Pinpoint Test D .

DTC Description Fault Trigger Conditions
B1663 - Seat Driver Front Up/Down Motor Stalled
B1664 - Seat Driver Rear Up/Down Motor Stalled
B1665 - Seat Driver Forward/Backward Motor Stalled		 During self test, the DSM attempts to operate the appropriate seat track motor and uses the motor's position sensor to monitor movement. If no motor movement is sensed, the DTC is set. The DSM will retry motor operation on the next activation of the seat control switch. If no movement continues to be monitored after 250 milliseconds, the DSM disables the output.
B1666 - Seat Driver Recline Motor Stalled During self test, the DSM attempts to operate the recliner motor and uses the recliner motor position sensor to monitor movement. If no motor movement is sensed, the DTC is set. The DSM will retry motor operation on the next activation of the seat control switch. If no motor movement is still monitored after 250 milliseconds, the DSM disables the output.
B1703 - Seat Driver Recline Forward Switch Circuit Short to Battery
B1707 - Seat Driver Recline Rearward Switch Circuit Short to Battery		 If voltage is sensed on the switch input circuit during the DSM self-test, the DTC is set. If voltage is sensed on the input circuit for greater than 2 minutes, the DTC is set as continuous. With the DTC set, any input signal on the circuit is ignored.
B1711 - Seat Driver Front Up Switch Circuit Short to Battery
B1715 - Seat Driver Front Down Switch Circuit Short to Battery		 If voltage is sensed on the switch input circuit during the DSM self-test, the DTC is set. If voltage is sensed on the input circuit for greater than 2 minutes, the DTC is set as continuous. With the DTC set, any input signal on the circuit is ignored.
B1719 - Seat Driver Forward Switch Circuit Short to Battery
B1723 - Seat Driver Rearward Switch Circuit Short to Battery		 If voltage is sensed on the switch input circuit during the DSM self-test, the DTC is set. If voltage is sensed on the input circuit for greater than 2 minutes, the DTC is set as continuous. With the DTC set, any input signal on the circuit is ignored.
B1727 - Seat Driver Rear Up Switch Circuit Short to Battery
B1731 - Seat Driver Rear Down Switch Circuit Short to Battery		 If voltage is sensed on the switch input circuit during the DSM self-test, the DTC is set. If voltage is sensed on the input circuit for greater than 2 minutes, the DTC is set as continuous. With the DTC set, any input signal on the circuit is ignored.

This pinpoint test is intended to diagnose the following: 

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