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ELECTRICALLY HEATED SYSTEMS
Symptom:
PASSENGER SEAT HEAT OUTPUT OPEN - MHSAPM
When Monitored and Set Condition:
PASSENGER SEAT HEAT OUTPUT OPEN - MHSAPM
When Monitored: Ignition on, during the heated seat operation.
Set Condition: This condition is set immediately after the Memory Heated Seat Adjust-
able Pedal Module loses the seat heat element output.
STORED DIAGNOSTIC TROUBLE CODE
INTERMITTENT OPEN HEATER ELEMENT
PASSENGER SEAT HEATER B(+) DRIVER WIRE OPEN
PASSENGER SEAT HEATER GROUND CIRCUIT OPEN
PASSENGER HEATED SEAT CUSHION ELEMENT OPEN
PASSENGER HEATED SEAT BACK ELEMENT OPEN
MEMORY HEATED SEAT ADJUSTABLE PEDAL MODULE
TEST
1
With the DRBIII , erase the DTC from Memory/Heated Seat Adjustable Pedal
Module.
Turn the ignition switch to the Off position then start the engine and let run for one
minute.
Operate the heated seat system.
With the DRBIIl check for the same DTC to reset in the MHSAPM.
Did the same DTC reset?
Yes → Go To 2
→ Using the wiring schematic as a guide, inspect the wiring and
No
2
Turn ignition off.
Disconnect the MHSAPM C1 connector.
Measure the total resistance of the Passenger Seat Heater Circuit by connecting one
lead of the ohmmeter to the Passenger Seat Heater B(+) Driver circuit and the
Passenger Seat Heater Ground circuit at the MHSAPM C1 connector.
Is the resistance below 4.0 ohms?
Yes → Replace the Memory Heated Seat Adjustable Pedal Module.
→ Go To 3
No
POSSIBLE CAUSES
ACTION
connectors for an intermittent condition. Check for an intermit-
tent open cushion or seat back element by applying pressure to
seat with the heater on and watch the DRBIII for the DTC to
reset.
Perform BODY VERIFICATION TEST - VER 1.
Perform BODY VERIFICATION TEST - VER 1.
408
APPLICABILITY
All
All
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