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Diagnostic Manual, Body and Accessories,
Volume 4.1

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LOCATION:    14.4 Heated Seats (HS)   >   14 Diagnosis - Complaint Related Diagnostic Chart


Diagnosis - Complaint Related Diagnostic Chart

Preparation for Test:
1. Review 11, 20, 22

Electrical wiring diagrams:
Electrical Troubleshooting Manual, Model 163,
(available in Work Shop Information System [WIS] only)


Test Functions

Complaint/Problem Possible cause Test step/Remedy 1)
Entire front seat (left and right) heater system does not function. Convenience relay (F1k14)  
Left front seat
Heating stage I does not function.
Seat heater relay (stage 1) (K59)
Left front seat heater switch (S51/1)
LF seat cushion heater element (R13/1)
LF backrest heater element (R13/2)
23 1.0,
23 3.0,
23 5.0
Left front seat
Heating stage II does not function.
Seat heater relay (stage 2) (K59/1)
Left front seat heater switch (S51/1)
23 2.0,
23 3.0
Left front seat, heating stage II ,
LF seat cushion heater element (R13/1) does not function
LF seat cushion heater element (R13/1) 23 5.0
Left front seat, heating stage II ,
LF backrest heater element (R13/2) does not function
LF backrest heater element (R13/2) 23 5.1
Right front seat
Heating stage I does not function.
Seat heater relay (stage 1) (K59)
Right front seat heater switch (S51/2)
RF seat cushion heater element (R13/3)
RF backrest heater element (R13/4)
23 7.0,
23 9.0,
23 11.0
Right front seat
Heating stage II does not function.
Seat heater relay (stage 2) (K59/1)
Right front seat heater switch (S52/1)
23 8.0,
23 9.0
Right front seat, heating stage II ,
RF seat cushion heater element (R13/3) does not function
RF seat cushion heater element (R13/3) 23 12.0, 13.0
Left front seat, heating stage II ,
RF backrest heater element (R13/4) does not function
RF backrest heater element (R13/4) 23 12.0, 13.0
1) Observe Preparation for Test, see 22.