Test step
DTC |
Test scope
|
Test connection
|
Test condition
|
Nominal value
|
Possible cause/Remedy
|
1.0 |
Front HS control
module (N25/5)
Voltage supply
Circuit 30
Circuit 15zx |
9 
9
|
|
 1
3
|
Ignition: OFF
Ignition: ON |
11 - 14 V
11 - 14 V |
Wiring |
|
2.0 |
Left front seat heater
switch (S51/1)
Voltage supply |
9
9
|
|
5
13
|
Ignition: ON
S51/1 Stage I held in depressed position
S51/1 Stage II held in depressed position
|
11 - 14 V
0 - 1 V
0 - 1 V |
2.1,
Front HS control module (N25/5). |
|
2.1 |
Left front seat heater
switch (S51/1)
Resistance |
9
9
|
|
5
13
|
Ignition: OFF
Disconnect test cable from N25/5.
S51/1 Stage I held in depressed position
S51/1 Stage II held in depressed position |
>20 k
0 - 2
0 - 2
|
Wiring,
Left front seat heater switch (S51/1). |
|
3.0 |
Left front seat cushion
heater element (R13/1) and
left backrest heater
element (R13/2)
Voltage supply
|
9
19
9
9
|
|
|
Ignition: ON
Left front seat heater switch (S51/1) in stage II
Left front seat heater switch (S51/1) in stage I |
0 - 1 V
9 - 14 V
9 - 14 V
5 - 7 V
9 - 14 V
|
3.1,
Front HS control module (N25/5). |
|
3.1 |
Resistance |
19
8
|
|
8
9
|
Ignition: OFF
Disconnect test cable from N25/5.
R13/2
R13/1 |
3.0 - 4.0
3.0 - 4.0
|
Wiring,
Left front seat cushion heater element (R13/1),
Left backrest heater element (R13/2). |
|
4.0 |
Right front seat cushion
heater element (R13/3) and
right backrest heater
element (R13/4)
Voltage supply |
9
4
9
9
|
|
|
Ignition: ON
Right front seat heater switch (S51/2) in stage II
Right front seat heater switch (S51/2) in stage I |
0 - 1 V
9 - 14 V
9 - 14 V
5 - 7 V
9 - 14 V
|
4.1,
Front HS control module (N25/5). |
|
4.1 |
Resistance |
2
9
|
|
4
2
|
Ignition: OFF
Disconnect test cable from N25/5.
R13/4
R13/3 |
3.0 - 4.0
3.0 - 4.0 |
Wiring,
Right front seat cushion heater element (R13/3),
Right backrest heater
element (R13/4). |
|
5.0 |
Left front seat heater
switch (S51/1), indicator lamps
Voltage supply |
9
9
|
|
12
20
|
Ignition: ON
S51/1 Stage I turned on
S51/1 Stage II turned on
S51/1 Stage I turned on
S51/1 Stage II turned on |
0 - 1 V
8 - 13 V
8 - 13 V
0 - 1 V
8 - 13 V
|
Wiring,
Left front seat heater switch (S51/1),
Front HS control module (N25/5). |
|
6.0 |
Left front seat heater
switch (S51/1), illumination
Voltage supply |
6 |
S51/1
|
5
|
Disconnect plug on S51/1
Turn on parking lamps |
11 - 14 V |
Wiring. |
|
7.0
|
Right front seat heater
switch (S51/2)
Voltage supply |
9
9
|
|
17
18
|
Ignition: ON
S51/2 Stage I hold depressed
S51/2 Stage II hold depressed
|
9 - 14 V
0 - 1 V
0 - 1 V
|
7.1,
Front HS control module (N25/5). |
|
7.1 |
Right front seat heater
switch (S51/2)
Resistance |
9
9
|
|
17
18
|
Ignition: OFF
Disconnect test cable from N25/5.
S51/2 Stage I hold depressed
S51/2 Stage II hold depressed
|
>20 k
0 - 2
0 - 2
|
Wiring,
Right front seat heater
switch (S51/2). |
|
8.0 |
Right front seat heater
switch (S51/2), indicator lamps
Voltage supply |
9
9
|
|
11
10
|
Ignition: ON
S51/2 Stage I turned on
S51/2 Stage II turned on
S51/2 Stage I turned on
S51/2 Stage II turned on
|
0 - 1 V
8 - 13 V
8 - 13 V
0 - 1 V
8 - 13 V |
Wiring,
Right front seat heater switch (S51/2),
Front HS control module (N25/5). |
|
9.0 |
Right front seat heater
switch (S51/2), illumination
Voltage supply |
6
|
S51/2
|
5
|
Disconnect plug on S51/2
Turn on parking lamps
|
11 - 14 V |
Wiring. |
Printable
version
