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Symptom:
DRIVER REAR RISER SENSOR OUT OF RANGE HIGH - MHSAPM
When Monitored and Set Condition:
DRIVER REAR RISER SENSOR OUT OF RANGE HIGH - MHSAPM
When Monitored: Contiguously with the PCI bus active.
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.
DRIVER SEAT POSITION SENSOR GROUND WIRE OPEN
MEMORY/HEATED SEAT ADJUSTABLE PEDAL MODULE
DRIVER SEAT SENSOR 5 VOLT SUPPLY SHORTED HIGH
DRIVER SEAT REAR RISER POSITION SIGNAL CIRCUIT SHORT TO VOLTAGE
DRIVER REAR RISER SEAT SENSOR HIGH
DRIVER REAR RISER SEAT SENSOR SHORT TO MOTOR
MEMORY/HEATED SEAT ADJUSTABLE MODULE
STORED DIAGNOSTIC TROUBLE CODE
TEST
1
With the DRBIII , erase the DTC from Memory/Heated Seat Adjustable Pedal
Module (MHSAPM).
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 DRBIII check for the same DTC to reset in the MHSAPM.
Did the same DTC reset?
Yes → Go To 2
→ Using the wiring diagram/schematic as a guide, inspect the
No
2
Turn ignition off.
Disconnect the Driver Rear Riser Seat Position Sensor connector.
Measure the resistance of the Driver Seat Position Sensor Ground circuit at the
driver rear riser seat position sensor connector.
Is the resistance below 5.0 ohms?
Yes → Go To 3
→ Go To 8
No
POSSIBLE CAUSES
ACTION
wiring and connectors for an intermittent condition.
Perform POWER SEAT SYSTEM VERIFICATION TEST - VER 1.
853
POWER SEATS
APPLICABILITY
All
All
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