Diagnostic Procedure

DRIVER SEAT HEAT OUTPUT SHORT TO GROUND - MHSAPM - DIAGNOSTIC PROCEDURE

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 Driver Heated Seat Cushion 4-way connector. With the DRBIII®, erase DTC's. Turn the Driver 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 Driver Heated Seat Cushion 4-way connector. Disconnect the MHSAPM C3 connector. Measure the resistance of the Driver Seat Heater B(+) Driver circuit to the Driver Seat Heater Ground circuit. Is the resistance below 1000.0 ohms? Yes: Repair the Driver Seat Heater B(+) Driver wire for a short to the Driver Seat Heater Ground circuit. Perform BODY VERIFICATION TEST VER-1 . No: Go To 4	All
4	Turn ignition off. Disconnect the Driver Heated Seat Cushion 4-way connector. Disconnect the MHSAPM C3 connector. Measure the resistance of the Driver Seat Heater B(+) Driver circuit to ground. Is the resistance below 1000.0 ohms? Yes: Repair the Driver 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 Driver Heated Seat Cushion 4-way connector. Disconnect the Driver Heated Seat Back 2-way connector. Measure the resistance of the Driver Seat Heater B(+) Driver circuit in the Driver Heated Seat Cushion 4-way connector cushion side to body ground. Is the resistance below 1000.0 ohms? Yes: Replace the Driver Heated Seat Cushion/Element as necessary. Perform BODY VERIFICATION TEST VER-1 . No: Go To 6	All
6	Disconnect the Driver Heated Seat Back 2-way connector. Measure the resistance of the Heated Seat Driver circuit, in the Driver Heated Seat Back 2-way connector seat back side to body ground. Is the resistance below 1000.0 ohms? Yes: Replace the Driver Heated Seat Back/Element as necessary. Perform BODY VERIFICATION TEST VER-1 . No: Go To 7	All
7	Reconnect the Driver Heated Seat Back 2-way connector if disconnected. Disconnect the Driver Heated Seat Cushion 4-way connector. Measure the resistance of the Driver Seat Heater B(+) Driver circuit to the Driver Seat Heater Ground circuit at the Driver Heated Seat Cushion 4-way connector. Is the resistance below 1000.0 ohms? Yes: Repair the Driver Seat Heater B(+) Driver circuit for a short to the Driver Seat Heater Ground circuit. 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