Front Riser Sensor Out Of Range Low

When Monitored: Ignition on.

Set Condition: This condition is immediately set when the seat motor potentiometer feeds a value lower than the Memory Seat Module has stored in EEPROM.

Possible Causes are:

SEAT SENSOR 5-VOLT SUPPLY SHORT TO GROUND
FRONT RISER SENSOR (LOW)
SEAT SENSOR 5-VOLT SUPPLY OPEN
FRONT RISER POSITION SIGNAL CIRCUIT SHORT TO GROUND
FRONT RISER POSITION SIGNAL CIRCUIT OPEN
MEMORY SEAT MODULE INTERNAL 5-VOLT LOW
MEMORY SEAT MODULE INTERNAL SENSE LOW

Ensure the Memory Seat Module is fully connected before proceeding. Disconnect the Driver Power Seat Front Riser Sensor connector. Turn ignition on. Measure the voltage of the seat sensor 5-volt supply circuit. Is the voltage more than 4.5 volts? If yes, go to next step. If no, go to step 6 .
Turn ignition off. Disconnect the Driver Power Seat Front Riser Sensor connector. Connect a jumper wire between seat sensor 5-volt supply and Front Riser Position Signal circuits. Ensure the Memory Seat Module is fully connected before proceeding. Using the DRBIII(R), select: Body, Memory Seat and Sensors. Turn ignition on. Read the Front Riser Position Sensor voltage. Is the voltage more than 4.5 volts? If yes, replace the Seat Track Assy. Perform MEMORY SYSTEM VERIFICATION TEST under VERIFICATION TESTS. If no, go to next step.
Turn ignition off. Disconnect the Seat Module C1 connector. Disconnect the Driver Power Seat Front Riser Sensor connector. Measure the resistance of the Front Riser Position Signal circuit to ground. Is the resistance less than 1000 ohms? If yes, repair the Front Riser Position Signal Circuit for a short to ground. Perform MEMORY SYSTEM VERIFICATION TEST under VERIFICATION TESTS. If no, go to next step.
Turn ignition off. Disconnect the Driver Power Seat Front Riser Sensor connector. Disconnect the Seat Module C1 connector. Measure the resistance of the Front Riser Position Signal circuit between the Sensor connector and the Seat Module C1 connector. Is the resistance less than 5 ohms? If yes, go to next step. If no, repair the open Front Riser Position Signal circuit. Perform MEMORY SYSTEM VERIFICATION TEST under VERIFICATION TESTS.
If there are no possible causes remaining, replace the Memory Seat Module. Perform MEMORY SYSTEM VERIFICATION TEST under VERIFICATION TESTS.
Turn ignition off. Disconnect the Seat Module C1 connector. Measure the resistance of the seat sensor 5-volt supply circuit to body ground. Is the resistance less than 1000 ohms? If yes, repair the seat sensor 5-volt supply for a short to ground. Perform MEMORY SYSTEM VERIFICATION TEST under VERIFICATION TESTS. If no, go to next step.
Turn ignition off. Disconnect the Seat Module C1 connector. Disconnect the Driver Power Seat Front Riser Sensor connector. Measure the resistance of the seat sensor 5-volt supply circuit between the Front Riser Sensor connector and the Seat Module C1 connector. Is the resistance less than 5 ohms? If yes, go to next step. If no, repair the open seat sensor 5-volt supply circuit. Perform MEMORY SYSTEM VERIFICATION TEST under VERIFICATION TESTS.
If there are no possible causes remaining, replace the Memory Seat Module. Perform MEMORY SYSTEM VERIFICATION TEST under VERIFICATION TESTS.