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Home >> Chrysler >> 2005 >> Pacifica Limited >> Repair and Diagnosis >> Accessories & Equipment >> Seats >> Body Diagnostic Procedures - Diagnostic Information And Procedures - Chime, Communication, Door Ajar, Electrically Heated Systems, Exterior Lighting >> Electrically Heated Systems >> Symptom: PASSENGER SEAT HEAT OUTPUT SHORT TO GROUND - MHSAPM >> Diagnostic Procedure

Diagnostic Procedure

PASSENGER SEAT HEAT OUTPUT SHORT TO GROUND SYMPTOM CHART

TEST ACTION APPLICABILITY
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 DRBIII® check for the same DTC to reset in the MHSAPM.
Did the same DTC reset?
Yes --> Go To 2
No --> Using the wiring diagram/schematic as a guide, inspect the wiring and connectors for an intermittent condition.
Perform BODY VERIFICATION TEST - VER 1 .		 All
2 Disconnect the Passenger Heated Seat Cushion 4-way connector.
With the DRBIII®, erase DTC's.
Turn the Passenger Seat Heater on.
Using the DRBIII re-read DTC's
Does the DRBIII® show the same code?
Yes --> Go To 3
No --> Go To 5		 All
3 Turn ignition off.
Disconnect the Passenger Heated Seat Cushion 4-way connector.
Disconnect the MHSAPM C1 connector.
Measure the resistance of the Passenger Seat Heater B(+) Driver circuit to the Passenger Seat Heater Ground circuit.
Is the resistance below 1000.0 ohms?
Yes --> Repair the Passenger Seat Heater B(+) Driver wire for a short to the Passenger Seat Heater Ground circuit.
Perform BODY VERIFICATION TEST - VER 1 .
No --> Go To 4		 All
4 Turn ignition off.
Disconnect the Passenger Heated Seat Cushion 4-way connector.
Disconnect the MHSAPM C1 connector.
Measure the resistance of the Passenger Seat Heater B(+) Driver circuit to ground.
Is the resistance below 1000.0 ohms?
Yes --> Repair the Passenger Seat Heater B(+) Driver wire for a short to ground.
Perform BODY VERIFICATION TEST - VER 1 .
No --> Replace the Memory Heated Seat Adjustable Pedal Module
Perform BODY VERIFICATION TEST - VER 1 .		 All
5 Disconnect the Passenger Heated Seat Cushion 4-way connector.
Measure the resistance of the Passenger Seat Heater B(+) Driver circuit in the Passenger Heated Seat Cushion 4-way connector cushion side to body ground.
Is the resistance below 4.0 ohms?
Yes --> Repair the pigtail wiring for a short to the seat frame or replace the Passenger Heated Seat Cushion/Element as necessary.
Perform BODY VERIFICATION TEST - VER 1 .
No --> Go To 6		 All
6 Disconnect the Passenger Heated Seat Back 2-way connector.
Measure the resistance of the Passenger Heated Seat Driver to the Passenger Seat Heater Ground, in the Passenger Heated Seat Back 2-way connector seat back side.
Is the resistance below 4.0 ohms?
Yes --> Replace the Passenger Heated Seat Back/Element as necessary.
Perform BODY VERIFICATION TEST - VER 1 .
No --> Go To 7		 All
7 Disconnect the Passenger Heated Seat Back 2-way connector if disconnected.
Disconnect the Passenger Heated Seat Cushion 4-way connector.
Measure the resistance of the Passenger Seat Heater B(+) Driver circuit to the Passenger Seat Heater Ground circuit at the Passenger Heated Seat Cushion 4-way connector.
Is the resistance below 3.5 ohms?
Yes --> Repair the Passenger Seat Heater B(+) Driver circuit for a short to the Passenger Seat Heater Ground circuit or replace the Passenger Heated Seat Cushion/Element as necessary.
Perform BODY VERIFICATION TEST - VER 1 .
No --> Inspect the heated seat wiring for a short that may have been removed during testing and repair as necessary.
Perform BODY VERIFICATION TEST - VER 1 .		 All
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