O21 DRIVER'S SEAT HEATING IS NOT WORKING - Lancia - THESIS - eLearn

374113 - O21 DRIVER'S SEAT HEATING IS NOT WORKING

the driver's seat heater pad and potentiometer are connected to the Driving Position Node.The seat heater pad consists of two elements, fitted in the seat and the backrest, controlled in parallel by the Driving Position Node.The heater pad in the seat has an NTC sensor for controlling the temperature.

STEP	OPERATIONS TO BE CARRIED OUT	TEST RESULTS
1	CHECK USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Connect the Examiner diagnostic equipment to the diagnostic connect and check the following at the Driving Position NodeIn errors ambient that there are no faults In parameters ambient the plausibility of the heater pad potentiometer parameter In active diagnosis ambient the operation of the heater pad	Move on to Step	1. presence of faults	1. continue following the instructions for the diagnostic equipment.
			2. heater pad potentiometer parameter not plausible	Move on to Step
			3. heater pad not working	Move on to Step
2	COMPONENT CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Remove the control panel and check: the operation of the temperature selector the electrical connection between the Driving Position Node and the potentiometer (Wiring Diagram ) E3075 HEATED SEATS	Move on to Step	1. Temperature selector faulty	1. Replace the temperature selector
		Move on to Step	2. Electrical equipment faulty	2. Restore the electrical connection (Wiring Diagram ) E3075 HEATED SEATS
3	ELECTRICAL SYSTEM CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Remove the seat and check the electrical connection between: Driving Position Node and heater pad in seat Driving Position Node and sensor for heater pad in seat Driving Position Node and backrest heater pad Heater pads and earth (Wiring Diagram ) E3075 HEATED SEATS	Move on to Step	Electrical equipment faulty	Restore the electrical connection (Wiring Diagram ) E3075 HEATED SEATS
4	COMPONENT CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the resistance of the heater pads (about 5.5 ohm at 20 degrees) the resistance of the heater pad sensor (about 1 kohm at 20 degrees) (Wiring Diagram ) E3075 HEATED SEATS	Move on to Step	1. Heater pads broken	1. Replace the heater pads
		Move on to Step	2. Sensor broken	2. Replace the seat heater pad.
5	CHECK ON CORRECT OPERATION	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the fault is no longer present		Fault persists	Replace the Driving Position Node