MSM-Driver Horizontal Sensor Out Of Range High
MSM-DRIVER HORIZONTAL SENSOR OUT OF RANGE HIGH
For a complete wiring diagram Consult Diagrams/Electrical
- When Monitored:
Continuously.
- Set Condition:
This condition is immediately set when the seat motor potentiometer feeds a value higher than the Memory/Heated Seat Adjustable Pedal Module has stored in EEPROM. Code will remain for 50 ignition cycles.
Diagnostic Test
1. STORED DTC
With the scan tool, erase the DTC from Memory/Heated Seat Adjustable Pedal Module.
Operate the driver's power seat and memory system.
Turn the ignition switch to the Off position then start the engine and let run for one minute.
With the scan tool check for the same DTC to reset in the MHSAPM.
Did the same DTC reset?
Yes
- Go To2
No
- Using the wiring diagram/schematic as a guide, inspect the wiring and connectors for an intermittent condition.
- PERFORM POWER SEAT SYSTEM VERIFICATION TEST - VER 1. Power Seat System Verification Test
2. (P28) DRIVER SEAT POSITION SENSOR GROUND CIRCUIT OPEN
Turn ignition off.
Disconnect the Driver Horizontal Seat Position Sensor connector.
Measure the resistance of the (P28) Driver Seat Position Sensor Ground circuit at the Driver Horizontal Seat Position Sensor connector.
Is the resistance below 5.0 ohms?
Yes
- Go To3
No
- Go To7
3. (P29) DRIVER SEAT SENSOR 5 VOLT SUPPLY SHORTED HIGH
Disconnect the Driver Horizontal Seat Position Sensor connector.
Measure the voltage between (P29) Driver Seat Sensor 5 volt supply circuit and ground.
Turn ignition on.
Is the voltage above 5.5 volts?
Yes
- Repair the (P29) Driver Seat Sensor 5 Volt Supply circuit for a short to battery.
- PERFORM POWER SEAT SYSTEM VERIFICATION TEST - VER 1. Power Seat System Verification Test
No
- Go To4
4. CHECK VOLTAGE ON (P25) DRIVER SEAT HORIZONTAL POSITION SIGNAL CIRCUIT
Turn ignition off.
Disconnect the Driver Horizontal Seat Position Sensor Connector.
Disconnect the MHSAPM C2 Connector.
Turn ignition on.
Measure the voltage between (P25) Driver Seat Horizontal Position Signal circuit and ground.
Is the voltage above 0.2 volts?
Yes
- Repair the (P25) Driver Seat Horizontal Position Signal circuit for a short to voltage.
- PERFORM POWER SEAT SYSTEM VERIFICATION TEST - VER 1. Power Seat System Verification Test
No
- Go To5
5. HORIZONTAL SENSOR HIGH
Turn ignition off.
Disconnect the Driver Horizontal Seat Position Sensor Connector.
Ensure the Memory/Heated Seat Adjustable Pedal Module is fully connected before proceeding.
Turn ignition on.
With the scan tool in MHSAPM Sensors,
Read the Driver Seat Horizontal Sensor voltage.
Is the voltage above 0.2 volts?
Yes
- Go To6
No
- Replace the Seat Track Assembly.
- PERFORM POWER SEAT SYSTEM VERIFICATION TEST - VER 1. Power Seat System Verification Test
6. CHECK HORIZONTAL SENSOR SHORT TO MOTOR
Ensure all seat and sensor connectors are connected and Horizontal motor is operational.
With the scan tool in MHSAPM Sensors monitor the Driver Seat Horizontal Sensor while operating the seat Horizontal motor to both limits.
Did the voltage ever go above 7.0 volts only when the motor was in operation?
Yes
- Replace the Seat Track Assembly.
- PERFORM POWER SEAT SYSTEM VERIFICATION TEST - VER 1. Power Seat System Verification Test
No
- Replace the Memory/Heated Seat Adjustable Pedal Module.
- PERFORM POWER SEAT SYSTEM VERIFICATION TEST - VER 1. Power Seat System Verification Test
7. (P28) DRIVER SEAT POSITION SENSOR GROUND WIRE OPEN
Turn ignition off.
Disconnect the MHSAPM C2 connector.
Disconnect the Driver Horizontal Seat Position Sensor connector.
Measure the resistance of the (P28) Driver Seat Position Sensor Ground wire between the Horizontal Sensor connector and the C2 connector.
Is the resistance below 5.0 ohms?
Yes
- Replace the Memory/Heated Seat Adjustable Pedal Module.
- PERFORM POWER SEAT SYSTEM VERIFICATION TEST - VER 1. Power Seat System Verification Test
No
- Repair the open (P28) Driver Seat Position Sensor Ground wire.
- PERFORM POWER SEAT SYSTEM VERIFICATION TEST - VER 1. Power Seat System Verification Test