STI Home
Diagnostic Manual, Body and Accessories,
Volume 3

 Printable version
LOCATION:    11.5 Cabriolet Soft Top (CST), Roll Bar (RB) (Manual Operation)   >  23 Electrical Test Program - Test


Electrical Test Program - Test

Test scope
Test connection
Test condition Nominal value Possible cause/ Remedy
1.0
Roll bar control module power soft top (N52)
Voltage supply, terminal 30 for soft top electronics


51



52
N52



N52



4



41
 

11-14 V



11-14 V
Wiring.
1.1   Voltage supply, terminal 30 for left rear power window

3
N52



40




Left rear power window operated


11-14 V

11-14 V
Wiring.
1.2   Voltage supply, terminal 30 for right rear power window

21
N52



38




Right rear power window operated


11-14 V

11-14 V
Wiring.
1.3   Voltage supply, terminal 15

51
N52



14
Ignition: ON


11-14 V
Wiring.
2.0   Roll bar control module power soft top (N52)
Voltages on CAN data buses:

Voltage on CAN LOW line


Voltage on CAN HIGH line


















N52
19


37

Ignition: ON









3.2 V (oscillating)

1.8 V (oscillating)
Wiring,
Read out DTC's from control modules of CAN interior bus using HHT.
Value OK:
2.1
2.1   Voltage between CAN LOW and CAN high line

37
N52



19
Ignition: OFF

Ignition: ON

Ignition: OFF
after approx. 30 seconds ("Sleep mode")
-

1.4 V

1.4 V
4.8 V
Wiring,
Read out DTC's from control modules of CAN interior bus using HHT.
3.0 Power soft top switch (S84)
Voltage supply and signal voltages.


52


N52
55
Ignition: ON

S84 in rest position.

S84 operated towards "close soft top".

S84 operated towards "open soft top".
-

11 - 14 V


0 - 1 V



Approx. 3V
Roll bar control module power soft top (N52).
3.1
3.1   Resistance

52
N52




55
Ignition: OFF
Test cable disconnected from control module.
S84 in rest position.

S84 operated towards "open soft top".

S84 operated towards "close soft top".






> 20 k

Approx.
200


approx. 1

Only one value not OK:
S84.
Several values not OK:
wiring,
or
S84.
4.0   Indicator lamp in power soft top switch (S84)
Voltage supply from roll bar control module (power soft top) (N52)


1

S84


2
Connector on S84 disconnected.
Soft top unlocked manually.
Ignition: ON




approx. 11 V
N52,
Nominal value OK, but still inoperative when connector is plugged in:
Wiring,
S84.
Value OK:
4.1
4.1   Illumination

1

S84


5
Connector on S84 disconnected
Exterior lamp switch S1 (terminal 58d): ON
Adjust maximum brightness at instrument cluster (A1)






approx. 11 V
Wiring,
Value OK but still no illumination when connector is plugged in:
S84.
5.0 RB hydraulic unit (power soft top); hydraulic unit relay (A7/5k1), voltage supply, terminal 30 measured at relay base.

4

A7/5k1


2
A7/5k1 disconnected

11-14 V
Wiring,
Value OK
5.1
5.1   Actuation of RB hydraulic unit (power soft top); hydraulic unit relay (A7/5k1) by roll bar control module (power soft top) (N52) measured at relay base.

4

A7/5k1


6
Roll bar:
Retracted.
A7/5k1 disconnected.
Ignition: OFF and ON again.

RB switch (manual operation) (S83) operated towards "extend roll bar"


11-14 V
Wiring,
Value OK
5.2

Value OK
5.3
5.2   Actuation of A7/5k1 by N52, measured at N52

52
N52



42
Roll bar:
Retracted.
A7/5k1 plugged in.
Socket box connected.
Ignition: OFF and ON again
S83 operated towards "extend roll bar"







11-14 V
S83,
Voltage supply from
N52
Value OK:
Wiring.
5.3   Voltage supply, terminal 30 under load, measured at relay base

4

A7/5k1


2
Roll bar:
Retracted.
A7/5k1 plugged in.

S83 operated towards "extend roll bar"





11-14 V
Wiring,
Value OK
5.4
5.4   Output voltage of RB hydraulic unit (power soft top) relay (A7/5k1), measured at relay base
4
A7/5k1

8
Roll bar:
Retracted.
A7/5k1 plugged in.
Ignition: ON

S83 operated towards "extend roll bar"






11-14 V
A7/5k1.
6.0   Resistance of RB hydraulic unit (power soft top) motor (A7/5m1), measured at relay base
A7/5m1



A7/5k1
8
A7/5k1 at RB hydraulic unit (power soft top) (A7/5).


Ignition: OFF






approx. 1
Wiring,
A7/5m1.
7.0 Resistance of RB hydraulic unit (power soft top) overload protection thermocouple (A7/5b1)
measured at roll bar control module (power soft top) (N52)


32
N52



18
Test cable at N52 disconnected.
Ignition: OFF
Pump temperature:
25 °C
30 °C
40 °C
120 °C






220±22 k
178±18 k
121±12.5 k
10± 2 k
Wiring
7.1
7.1   Resistance of RB hydraulic unit (power soft top) connector (A7/5x1)
2
A7/5x1

1
Test cable at N52 disconnected.
Ignition: OFF
Pump temperature:
25 °C
30 °C
40 °C
120 °C






220±22 k
178±18 k
121±12.5 k
10± 2 k
A7/5b1.
8.0

Retractable luggage cover engaged limit switch (S69/10)
Voltage supply and signal voltage




N52
28
Ignition: ON

Trunk luggage cover:
Pulled out

Rolled in




0-1 V

11-14 V
Both values not OK: roll bar control module (power soft top) (N52),


One value not OK:
8.1
8.1   Resistance



N52
28
Ignition: OFF
Disconnect test cable from control module.
Trunk luggage cover:
Pulled out

Rolled in






0-5

> 20 k
Wiring.
S69/10,

Value OK:
N52
9.0

Soft top locked (left) limit switch (S84/11)
Voltage supply and signal voltage




N52
15
Ignition: ON

Soft top:
Locked

Unlocked



0-1 V

11-14 V
Both values not OK:
Roll bar control module (power soft top) (N52),
One value not OK:
9.1
9.1   Resistance



N52
15
Ignition: OFF
Disconnect test cable from control module.

Soft top:
Locked

Unlocked






0-5

> 20 k
Wiring.
S84/11.
Value OK:
N52.
10.0

Soft top opened limit switch (S84/13s2)
Voltage supply and signal voltage




N52
33
Ignition: ON

Soft top:
Completely open

Closed



0-1 V


11-14 V
Both values not OK:
N52.
One value not OK:
10.1
10.1   Resistance



N52
33
Ignition: OFF
Test cable disconnected from control module.
Soft top:

Open

Completely open







> 20 k

0-5
Wiring.
Soft top opened limit switch (S84/13s2).
Value OK:
Roll bar control module (power soft top) (N52).

11.0

Soft top closed limit switch (S84/13s1)
Voltage supply and signal voltage




N52
31
Ignition: ON

Soft top:
Completely closed

Open



0-1 V

11-14 V
Both values not OK:
N52.
One value not OK:
11.1
11.1   Resistance



N52
31
Ignition: OFF
Test cable disconnected from control module.
Soft top:
Open

Completely closed






> 20 k

0-5
Wiring.
S84/13s1.
Value OK:
N52.
12.0

Soft top compartment "open" switch (S84/5)
Voltage supply and signal voltage




N52
50
Ignition: ON
Soft top compartment cover:
Completely open

Closed





0-1 V

11-14 V
Both values not OK:
Roll bar control module (power soft top) (N52).
Only one value not OK:
12.1
12.1   Resistance



N52
50
Ignition: OFF
Test cable disconnected from control module:
Soft top compartment cover:
Completely open

Closed








0-5


> 20 k
Wiring.
S84/5.
Value OK:
N52.
13.0

Soft top compartment closed limit switch (A25s1)
Voltage supply and signal voltage




N52
47
Ignition: ON
Soft top compartment cover:
Closed

Open



0-1 V

11-14 V
Both values not OK
N52.
One value not OK:
13.1
13.1   Resistance



N52
47
Ignition: OFF
Test cable disconnected from control module
Soft top compartment cover:
Open

Closed





> 20 k

0-5
Wiring
Soft top compartment closed limit switch (A25s1).
Value OK:
Roll bar control module (power soft top) (N52).
14.0

Soft top compartment locked limit switch (A25s2)
Voltage supply and signal voltage




N52
10
Soft top compartment cover:
Locked

Unlocked


0-1 V

11-14 V
Both values not OK:
N52.
One value not OK:
14.1
14.1   Resistance



N52
10
Ignition: OFF
Disconnect test cable from control module
Soft top compartment cover:
Locked

Unlocked







0-5

> 20 k
Wiring.
A25s2.

Value OK:
N52.
15.0



Soft top fabric bow up/down limit switch (S84/15)
Voltage supply and signal voltage of "soft top bow down"switch contact




N52
11
Ignition: ON

Soft top bow:
Completely down

Up



0-1 V


11-14 V
Both values not OK:
Roll bar control module (power soft top) (N52).
One value not OK:
15.2
Value OK:
15.1
15.1   Voltage supply and signal voltage of "soft top bow up" switch contact



N52
13
Ignition: ON
Soft top bow:
Completely up

Down


0-1 V

11-14 V
Both values not OK:
N52.
One value not OK:
15.3
15.2   Resistance of "soft top bow down" switch contact



N52
11
Ignition: OFF
Disconnect test cable from control module
Soft top bow:
Up

Completely down





> 20 k

0-5
Wiring.
S84/15.
Value OK:
N52.
15.3   Resistance of "soft top bow up" switch contact



N52
13
Ignition: OFF
Disconnect test cable from control module.

Soft top bow:
Down

Completely up






> 20 k

0-5
Wiring.
Soft top fabric bow up/down limit switch (S84/15).
Value OK:
Roll bar control module (power soft top) (N52).
16.0

Soft top bow locked limit switch (S84/16)
Voltage supply and signal voltage




N52
29
Ignition: ON

Soft top bow:
Locked

Unlocked



0-1 V

11-14 V
Both values not OK:
N52.
One value not OK:
16.1
16.1   Resistance



N52
29
Ignition: OFF
Test cable disconnected from control
module
Soft top bow:
Unlocked

Locked






> 20 k

0-5
Wiring.
S84/16.
Value OK:
N52.
17.0

RB "retracted" switch (S83/5)
Voltage supply and signal voltage




N52
16
Ignition: ON

Roll bar:
Completely retracted

Extended



0-1 V


11-14 V
Both values not OK:
Roll bar control module (power soft top) (N52).
One value not OK:
17.1.
17.1   Resistance



N52
16
Ignition: OFF
Test cable on N52 disconnected

Roll bar:
Completely retracted

Extended







0-5

> 20 k
Wires.
S83/5.
Values OK:
N52.
18.0

RB "extended" limit switch (S83/6)
Voltage supply and signal voltage




N52
34
Ignition: ON

Rollover bar:

Extended

Completely retracted




0-1 V

11-14 V
Both values not OK:
N52.
Only one value not OK:
18.1
18.1   Resistance



N52
34
Ignition: OFF
Test cable on Roll bar control module (power soft top) (N52) disconnected.

Roll bar:
Extended

Completely retracted







0-5

> 20 k
Wiring.
RB "extended" limit switch
(S83/6).
Values OK:
N52.
19.0 RB deployment solenoid (Y57/1)
Resistance


53
N52



22
Ignition: OFF
Test cable on N52 disconnected.


approx. 1
Wiring
Y57/1.
Value OK
19.1
19.1   Voltage supply from N52

52
N52



22
Test cable plugged in to N52.
Ignition: ON


11-14 V
N52.
20.0 RB switch (manual operation) (S83)
Voltage supply and signal voltages




N52
54
Ignition: ON

S83 in rest position.

Operate S83 towards "extend roll bar".

Operate S83 towards "retract roll bar".


11-14 V


approx. 3 V


0-1 V
One value not OK:
S83.
All three values 11-14 V:
Wiring.
S83.
20.1
20.1   Resistances



N52
54
Ignition: OFF
Test cable on roll bar control module (power soft top) (N52) disconnected.

S83 in rest position.

S83 operated towards "extend rollover bar".


Power soft switch (S84) operated towards "retract rollover bar".





> 20 k


approx.
250


approx. 1
One value not OK:
S83.
Two or three values not OK:
Wiring,
or
S83.

Values OK:
N52.