B1750

DTC B1750

CIRCUIT DESCRIPTION
The seat adjuster switch is supplied a 12-volt reference circuit by the memory seat module (MSM). When a seat adjuster switch is pressed the signal circuit is closed to the 12-volt reference circuit. Closing the signal circuit to the 12-volt reference circuit pulls the signal circuit high indicating to the MSM the switch status is active.

DTC DESCRIPTORs
This diagnostic procedure supports the following DTCs:
- DTC B1735 Seat Front Up Switch Circuit
- DTC B1740 Seat Front Down Switch Circuit
- DTC B1745 Seat Rear Up Switch Circuit
- DTC B1750 Seat Rear Down Switch Circuit
- DTC B1755 Seat Assembly Forward Switch Circuit
- DTC B1760 Seat Assembly Rearward Switch Circuit
- DTC B1815 Seat Recline Forward Switch Circuit
- DTC B1820 Seat Recline Rearward Switch Circuit

CONDITIONS FOR RUNNING THE DTC
The system voltage must be between 9-16 volts.

CONDITIONS FOR SETTING THE DTC
A seat adjuster switch input to the MSM is active for more than 30 seconds.

ACTION TAKEN WHEN THE DTC SETS
- The MSM will ignore the switch input for which a current status DTC is set.
- When the fault is no longer present a history status DTC will be stored, and switch operation will be restored.

CONDITIONS FOR CLEARING THE DTC
- The DTC will be current for as long as the fault is present.
- When the fault is no longer present the DTC will be a history status code.
- The history DTC will be cleared after 100 error free ignition cycles, or by using the scan tool clearing DTCs feature.

TEST DESCRIPTION

Steps 1 - 9:

The numbers below refer to the step numbers on the diagnostic table.
3. This step tests the seat adjuster switch for an internal fault.
4. When the seat adjuster switch is disconnected the faulty switch signal circuit will be isolated.