Front Riser Sensor Out Of Range High

When Monitored: Ignition on.

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

Possible Causes are:

• SEAT SENSOR GROUND WIRE OPEN
• FRONT RISER SENSOR SIGNAL SHORT TO MOTOR
• SEAT SENSOR 5-VOLT SUPPLY SHORT TO BATTERY
• FRONT RISER POSITION SIGNAL CIRCUIT SHORT TO VOLTAGE
• FRONT RISER SENSOR HIGH
• MEMORY SEAT MODULE INTERNAL GROUND OPEN
• MEMORY SEAT MODULE FRONT RISER HIGH

1. Turn ignition off. Disconnect the Driver Power Seat Front Riser Sensor connector. Measure the resistance of the Seat Position Sensor Ground circuit at the driver power seat front riser connector. Is the resistance less than 5 ohms? If yes, go to next step. If no, go to step  7 .
2. Ensure all seat and sensor connectors are connected and front riser motor is operational. Using the DRBIII(R), select BODY, MEMORY SEAT SENSORS. Monitor the Front Riser Position sensor while operating the seat front riser to both limits. Was the voltage more than 8 volts ONLY when the motor was in operation? If yes, replace the Seat Track Assembly. Perform MEMORY SYSTEM VERIFICATION TEST  under VERIFICATION TESTS. If no, go to next step.
3. Disconnect the Driver Power Seat Front Riser Sensor connector. Disconnect the Seat Module C1 connector. Turn ignition on. Measure the voltage between the Front Riser Position Signal circuit and ground. Is the voltage more than 0.2 volts? If no, go to next step. If yes, repair the Front Riser Position Signal circuit for a short to voltage. Perform MEMORY SYSTEM VERIFICATION TEST  under VERIFICATION TESTS.
4. Disconnect the Seat Front Riser Position Sensor connector. Measure the voltage between the Seat Sensor 5-volt supply circuit and ground. Is the voltage more than 5.5 volts? If yes, repair the seat sensor 5-volt supply circuit for a short to battery. Perform MEMORY SYSTEM VERIFICATION TEST  under VERIFICATION TESTS. If no, go to next step.
5. Turn ignition off. Disconnect the Driver Power Seat Front Riser Sensor connector. Ensure the Memory Seat Module is fully connected before proceeding. Turn ignition on. Using the DRBIII(R) in Memory Seat Sensors, read the Front Riser Position Sensor voltage. Is the voltage more than 0.2 volt? If yes, go to next step. If no, replace the seat track assembly. Perform MEMORY SYSTEM VERIFICATION TEST  under VERIFICATION TESTS.
6. If there are no possible causes remaining, replace the Memory Seat Module. Perform MEMORY SYSTEM VERIFICATION TEST  under VERIFICATION TESTS.
7. Turn ignition off. Disconnect the Seat Module connector C1. Disconnect the Driver Power Seat Front Riser Sensor connector. Measure the resistance of the Seat Position Sensor Ground wire between the Seat Module connector and the sensor connector. Is the resistance less than 5 ohms? If yes, go to next step. If no, repair the open Seat Sensor Ground Wire. Perform MEMORY SYSTEM VERIFICATION TEST  under VERIFICATION TESTS.
8. If there are no possible causes remaining, replace the Memory Seat Module. Perform MEMORY SYSTEM VERIFICATION TEST  under VERIFICATION TESTS.