 |
Test scope |
Test connection |
Test condition |
Nominal value |
Possible cause/Remedy |
| 1.0 |
Left front seat
Seat heater relay
(stage 1) (K59)
Function |
|
|
|
Replace seat heater relay (stage
1) (K59) with relay of same type i.e. with right seat heater relay
(K59).
Start engine.
HHT activation:
Stage 1
 
 |
 
Relay (K59) is activated.
|
If the values are OK:
K59
If the values are not OK:
1.1 |
| 1.1 |
Left front seat
Seat heater relay
(stage 1) (K59)
Activation |
2  |
K59
 |
 1
|
Remove relay (K59) from its socket.
Start engine.
HHT activation:
Stage 1
|
11 - 14 V
|
Wiring,
1.2 |
| 1.2 |
Left front seat
Seat heater relay
(stage 1) (K59)
Activation |
B3
|
X55/3
|
B5
|
Disconnect X55/3 connector.
Start engine.
HHT activation:
Stage 1
|
11 - 14 V
|
Wiring. |
|
2.0
|
Left front seat
Seat heater relay
(stage 2) (K59/1)
Function |
|
|
|
Replace seat heater relay (stage
2) (K59/1) with relay of same type i.e. with right seat heater relay
(K59/1).
Start engine.
HHT activation:
Stage 2
 |
Relay (K59/1) is activated.
|
If the values are OK:
K59/1
If the values are not OK:
2.1 |
| 2.1 |
Left front seat
Seat heater relay
(stage 2) (K59/1)
Activation |
2 |
K59/1
|
1
|
Remove relay (K59/1) from its socket.
Start engine.
HHT activation:
Stage 2
|
11 - 14 V
|
Wiring,
2.2 |
| 2.2 |
Left front seat
Seat heater relay
(stage 2) (K59/1)
Activation |
B4
|
X55/3
|
B5
|
Disconnect X55/3 connector.
Start engine.
HHT activation:
Stage 2
|
11 - 14 V
|
Wiring. |
| 3.0 |
Left front seat heater switch
(S51/1)
Function |
 |
|
N10
B12
(4) |
Disconnect connect 4 at N10
Press switch (S51/1):
Heating stage 1
Heating stage 2 |
< 1 
approx. 470
|
Wiring,
S51/1 |
| 4.0 |
Left front seat heater
Voltage supply |
B6 |
X55/3
|
B5
|
Disconnect connect X55/3
Ignition: ON |
11 - 14 V
|
Wiring,
Convenience relay (F1k14) |
| 5.0 |
LF/RF seat cushion/backrest heater
element (R13/1, R13/2)
(stage 1)
Voltage supply
|
X54/9
B |
|
X54/10
B |
Disconnect connect X54/9 and X54/10
Start engine.
HHT activation
Stage 1
|
11 - 14 V
|
Wiring. |
| 5.1 |
LF/RF seat cushion heater element
(R13/1, R13/2)
(stage 2)
Voltage supply
|
X54/9
B |
|
X54/9
A |
Disconnect connect X54/9
Start engine.
HHT activation:
Stage 2
|
11 - 14 V
|
Wiring. |
| 6.0 |
LF seat cushion heater element
(R13/1)
Resistance
|
X54/9
A |
|
X54/9
B |
Disconnect connector X54/9
|
5 - 10
|
Wiring,
R13/1 |
| 6.1 |
LF backrest heater element (R13/2)
Resistance
|
X54/10
A |
|
X54/10
B |
Disconnect connector X54/10
|
5 - 10
|
Wiring,
R13/2 |
| 7.0 |
Right front seat
Seat heater relay
(stage 1) (K59)
Function |
|
|
|
Replace seat heater relay (stage
1) (K59) with relay of same type i.e. with left seat heater relay
(K59).
Start engine.
HHT activation:
Stage 1
|
Relay (K59) is activated.
|
If the values are OK:
K59
If the values are not OK:
7.1 |
| 7.1 |
Right front seat
Seat heater relay
(stage 1) (K59)
Activation |
2 |
K59
|
1
|
Remove relay (K59) from its socket.
Start engine.
HHT activation:
Stage 1
|
11 - 14 V
|
Wiring,
7.2 |
| 7.2 |
Right front seat
Seat heater relay
(stage 1) (K59)
Activation |
B3
|
X55/4
|
B5
|
Disconnect X55/4 connector.
Start engine.
HHT activation:
Stage 1
|
11 - 14 V
|
Wiring. |
| 8.0 |
Right front seat
Seat heater relay
(stage 2) (K59/1)
Function |
|
|
|
Replace seat heater relay (stage
2) (K59/1) with relay of same type i.e. with left seat heater relay
(K59/1).
Start engine.
HHT activation:
Stage 2
|
Relay (K59/1) is activated.
|
If the values are OK:
K59/1
If the values are not OK:
8.1 |
| 8.1 |
Right front seat
Seat heater relay
(stage 2) (K59/1)
Activation |
2 |
K59/1
|
1
|
Remove relay (K59/1) from its socket.
Start engine.
HHT activation:
Stage 2
|
11 - 14 V
|
Wiring,
8.2 |
| 8.2 |
Right front seat
Seat heater relay
(stage 2) (K59/1)
Activation |
B4
|
X55/4
|
B5
|
Disconnect X55/4 connector.
Start engine.
HHT activation:
Stage 2
|
11 - 14 V
|
Wiring. |
| 9.0 |
Right front seat heater switch
(S51/2)
Function |
|
|
N10
B11
(4) |
Disconnect connect 4 at N10
Press switch (S51/2):
Heating stage 1
Heating stage 2 |
< 1
approx. 470
|
Wiring,
S51/2 |
| 10.0 |
Right front seat heater
Voltage supply |
B6 |
X55/4
|
B5
|
Disconnect connect X55/4
Ignition: ON |
11 - 14 V
|
Wiring,
Convenience relay (F1k14) |
| 11.0 |
RF/RF seat cushion/backrest heater
element (R13/3, R13/4)
(stage 1)
Voltage supply
|
X54/9
B |
|
X54/10
B |
Disconnect connect X54/9 and X54/10
Start engine.
HHT activation
Stage 1
|
11 - 14 V
|
Wiring. |
| 12.0 |
RF/RF seat cushion/backrest heater
element (R13/3, R13/4)
(stage 2)
Voltage supply
|
X54/9
B |
|
X54/9
A |
Start engine.
HHT activation:
Stage 2
|
11 - 14 V
|
Wiring. |
| 13.0 |
RF seat cushion heater element
(R13/3)
Resistance |
X54/9
A |
|
X54/9
B |
Disconnect connector X54/9
|
5 - 10
|
Wiring,
R13/3 |
| 13.1 |
RF backrest heater element (R13/4)
Resistance |
X54/10
A |
|
X54/10
B |
Disconnect connector X54/10
|
5 - 10
|
Wiring,
R13/4 |
Printable
version
