SEAT  SEAT HEATER SYSTEM  HOW TO PROCEED WITH TROUBLESHOOTING  

Interview the customer to confirm the problem.

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Measure the auxiliary battery voltage with the ignition switch off.*1

Measure the auxiliary battery voltage.*2

Standard Voltage:

11 to 14 V

If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding to the next step.

Check the fuses and relays.

Check the connector connections and terminals to make sure that there are no abnormalities such as loose connections, deformation, etc.

Clear the DTCs.

Body Electrical > Air Conditioner > Clear DTCs

50002 450

Check for DTCs.

Body Electrical > Air Conditioner > Trouble Codes

50001 450

Result:

Result	Proceed to
DTCs are not output	A
Air conditioning system DTCs are output	B
Seat heater system DTCs are output	C

Refer to Problem Symptoms Table.

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Result:

Result	Proceed to
Fault is not listed in Problem Symptoms Table	A
Fault is listed in Problem Symptoms Table	B

Operation Check

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Terminals of ECU

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Data List / Active Test

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Inspection