 |
 |
Test scope |
Test connection
|
Test condition |
Nominal value |
Possible cause/Remedy |
| 1.0 |
   |
ATA control module (N26)
Voltage supply
Circuit 31
|
N26
4 
|
|
 +
|
|
11 - 14 V |
Wiring.
|
| 1.1 |
|
Circuit 30 |
4 |
N26
 |
1
|
|
11 - 14 V |
Wiring. |
| 2.0 |
|
Signal from CL
Open/Close
with IRCL up to 05/97
|
11
|
N26
|
1
|
Unlock vehicle via IRCL
|
11 - 14 V |
Wiring,
IRCL control module. |
| 3.0 |
|
Lock nut switch signal from CL
Open
Actual value
(as of 06/97) |
|
|
|
HHT actual value,
      
   
Unlock vehicle using IRCL or mechanical key (only  )
|
 
   |
3.2 |
| 3.1 |
|
Lock nut switch signal from CL
Close
Actual value
|
|
|
|
HHT actual value,
Unlock vehicle using IRCL or mechanical key (only )
|
|
3.3 |
| 3.2 |
|
Opening
Signal Voltage |
11 |
N26
|
1
|
Unlock vehicle using IRCL or mechanical
key (only ) |
11 - 14 V
|
Wiring,
IRCL/RCL, see DM, B&A, Vol. 2, Test Section 4.10 |
| 3.3 |
|
Closing
Signal Voltage |
19 |
N26
|
1
|
Unlock vehicle using IRCL or mechanical
key (only ) |
11 - 14 V
|
Wiring,
IRCL/RCL, see DM, B&A, Vol. 2, Test Section 4.10 |
| 4.0 |
|
Left ATA/CF
microswitch (S86)
(up to 05/97)
with IRCL (up to 12/93) |
11 |
N26
|
1
|
Insert mechanical key into left door
lock, turn in direction lock or unlock and hold.
|
11 - 14 V |
Wiring,
S86 |
| 4.1 |
|
Right ATA/CF
microswitch (S87s1)
(up to 05/97)
with IRCL (up to 12/93) |
11 |
N26
|
1
|
Insert mechanical key into right
door lock, turn in direction lock or unlock and hold.
|
11 - 14 V |
Wiring,
S87s1 |
| 4.2 |
|
Rotary tumbler/trunk lid
microswitch (S88s1) |
11 |
N26
|
1
|
Insert mechanical key into trunk
lid lock, turn in direction lock or unlock and hold.
|
11 - 14 V |
Wiring,
S88s1 |
| 5.0 |
 |
Not applicable to U.S.A. vehicles |
|
|
|
|
|
|
| 6.0 |
 |
Door contact switch
Actual values |
|
|
|
HHT actual values.
 
   
Open left door
Close left door
Open right door
Close right door |
|
6.1 |
| 6.1 |
|
Left front door
switch (S17/3)
Contact |
24 |
N26
|
1
|
Open left door
|
11 - 14 V |
Wiring,
S17/3
|
| 6.2 |
|
Right front door
switch (S17/4)
Contact |
24 |
N26
|
1
|
Open right door
|
11 - 14 V |
Wiring,
S17/4
|
| 7.0 |
|
Rotary tumbler/trunk lid microswitch
(S88/1)
Actual values
|
|
|
|
HHT actual values
Rotary tumbler/trunk lid microswitch (S88/1) lamp: ON (lamp illuminates)
S88/1 OFF |
ON
OFF
|
7.1 |
| 7.1 |
|
Contact |
26 |
N26
|
1
|
S88/1 ON
S88/1 OFF
|
11 - 14 V
< 1 V |
Wiring,
S88/1 |
| 8.0 |
 |
Engine hood switch (S62)
Actual values
|
|
|
|
Engine hood closed:
Engine hood open:
|
ON
OFF |
8.1 |
| 8.1 |
|
Contact |
27 |
N26
|
1
|
Engine hood closed:
Engine hood open: |
< 1 V
11 - 14 V
|
Wiring,
S62,
N26 |
| 9.0 |
|
Stop lamp switch (S9/1)
Actual values
(up to 05/97) |
|
|
|
Ignition: ON
Service brake not pressed.
Press service brake:
|
|
9.1 |
| 9.1 |
|
Contact |
4 |
N26
|
23
|
Ignition: ON
Press service brake |
< 1 V
11 - 14 V
|
Wiring,
S9/1 |
| 10.0 |
|
Radio contact
Actual values
(only older radio generation up to 05/97)
|
|
|
|
HHT actual values
,
vehicle with radio
Vehicle without radio or contact not made.
|
|
10.1 |
| 10.1 |
|
Contact |
17 |
N26
|
1
|
Vehicle with radio
Vehicle witout radio or contact not made.
|
11 - 14 V
< 1 V
|
Wiring,
radio contact (X42/13) |
| 11.0 |
|
Ignition alarm circuit
(up to 05/97) |
4 |
N26
|
18
|
Ignition: OFF
Ignition: ON |
< 1 V
11 - 14 V |
Wiring,
Ignition/starter switch (S2/1) |
| 12.0 |
|
Alarm siren (H3)
Activation
(up to 05/98) |
|
|
|
ON
|
Alarm sounds. |
12.1 |
| 12.1 |
|
Function |
17 |
N26
|
13
|
Use bridges with 124 589 37 63 00 safety cables only.
|
Alarm sounds. |
Wiring,
H3 |
| 13.0 |
|
Alarm siren with auxiliary battery
(H3/1)
Function
(as of 06/98)
|
|
|
|
HHT activation:
Alarm siren test |
Alarm siren sounds short acoustical
signal (0.2 sec) |
13.1 |
| 13.1 |
|
Voltage supply |
2 |
H3/1 |
1
|
Disconnect connector at H3/1 |
11 - 14 V |
Wiring. |
| 13.2 |
|
Trigger alarm
|
|
|
|
Activate ATA.
Wait 15 seconds.
Disconnect connector at H3/1.
To stop alarm tone, reconnect connector at H3/1 and deactivate alarm.
|
There is both a acoustical
and
optical alarm actuation. |
H3/1
Wiring,
N26 |
| 14.0 |
|
Diagnostic Output
Contact |
N26
22 |
|
X11/4
11
|
Disconnect connector on N26
|
11 - 14 V
|
Wiring. |
| 15.0 |
|
Not applicable to U.S.A. vehicles |
|
|
|
|
|
|
| 15.1 |
|
Not applicable to U.S.A. vehicles |
|
|
|
|
|
|
| 16.0 |
|
Alarm circuit
Headlamps
Activation
(only )
|
|
|
|
HHT activation:
Headlamps
(only ) |
Headlamps: ON |
16.1
|
| 16.1 |
|
Function |
1 |
N26
|
12
|
Use bridges with 124 589 37 63 00 safety cables only.
|
Headlamps: ON |
Wiring,
Headlamp unit,
n26 |
| 17.0 |
|
Alarm circuit
Taillamps
Activation
(only )
|
|
|
|
HHT activation:
Taillamps |
Left/rightTail/
parking lamp
(E3e2, E4e2) illumin. steady. |
17.1
|
| 17.1 |
|
Left taillamp circuit
Function |
1 |
N26
|
14
|
Use bridges with 124 589 37 63 00 safety cables only.
|
Tail/parking lamp (E3e2) illuminates
steady. |
Wiring,
E3e2
|
| 17.2 |
|
Right taillamp circuit
Function |
1 |
N26
|
3
|
Use bridges with 124 589 37 63 00 safety cables only.
|
Tail/parking lamp (E4e2) illuminates
steady. |
Wiring,
E4e2,
If values are OK:
N26
|
| 18.0 |
|
Starter lock-out
circuit (K38)
Activation
(from 10/92 to 12/93 only)
|
|
|
|
HHT activation:
Starter lock-out ON,
Ignition/starter switch is in position 3 (circuit 50)
|
Engine does not start. |
18.1
|
| 18.1 |
|
Resistance |
5 |
N26
 |
18
|
Igntion: OFF
|
50 - 60  |
Wiring,
K38 |
| 18.2 |
|
Circuit 15
|
5 |
N26
|
18
|
Ignition: ON |
11 - 14 V |
Wiring,
Circuit 15
|
| 18.3 |
|
Ground |
 |
N26
|
4
|
Ignition: ON
|
11 - 14 V |
Wiring.
|
| 18.4 |
|
Circuit 31 from ATA control module
(N26) |
5 |
K38
|
4
|
Ignition: ON
|
11 - 14 V |
Wiring,
N26
|
| 18.5 |
|
Starter lock-out relay module (K38)
Circuit 50 |
3 |
K38
|
1
|
Igntion: OFF
|
11 - 14 V |
Wiring,
K38,
Ignition/starter switch (S2/1),
Starter.
|
| 19.0 |
|
ATA status indicator (E33)
Activation
(without anti-tow protection) |
|
|
|
HHT activation
|
E33 illuminates. |
19.1 |
| 19.1 |
|
Function
|
8 |
N26
|
1
|
Use bridges with 124 589 37 63 00 safety cables only.
|
E33 illuminates. |
Wiring,
E33,
N26 |
| 20.0 |
|
ATA status/towing protection switch
(S85/3)
Activation of the status indication
(with anti-tow protection)
|
|
|
|
HHT activation:
ATA status indicator LED:
ON |
LED in switch illuminates. |
20.1 |
| 20.1 |
|
Function |
8 |
N26
|
1
|
Use bridges with 124 589 37 63 00 safety cables only.
|
LED in switch illuminates. |
Wiring,
S85/3,
N26
|
| 21.0 |
|
Model recognition
Actual values
(up to 05/97)
|
|
|
|
HHT actual values:
Model |
129 |
19.1 |
| 21.1 |
|
Ground activation |
33 |
N26
|
1
|
Socket 33 must be contacted. |
11 - 14 V |
Wiring. |
| 22.0 |
|
Ant-tow control
module (N27)
Activation
(up to 05/97)
|
|
|
|
HHT activation:
 
Wait 15 seconds.
Lift vehicle at lift point using vehicle jack.
|
|
22.1 |
| 22.1 |
|
Voltage supply |
5 |
N27
|
2
|
Activate ATA,
Wait 60 seconds,
Lift vehicle at lift point using vehicle jack.
|
11 - 14 V
|
Wiring,
N26
If values are OK:
22.2
|
| 22.2 |
|
Trigger signal |
29 |
N26
|
2
|
Activate ATA,
Wait 60 seconds,
Lift vehicle at lift point using vehicle jack.
|
11 - 14 V, only briefly. |
Wiring,
N27 |
| 23.0 |
|
ATA tow sensor (B33)
Activation
(as of 06/97)
|
|
|
|
HHT actual values:
Wait 15seconds.
Lift vehicle at lift point using vehicle jack.
|
|
23.1 |
| 23.1 |
|
Voltage supply |
5 |
B33
|
1
|
Activate ATA |
11 - 14 V |
Wiring. |
| 23.2 |
|
Simulate ATA triggering |
1 |
B33
|
5
|
Disconnect connector at B33,
Activate ATA,
Install bridge,
Use bridges with 124 589 37 63 00 safety cables only.
|
Alarm is activated. |
Wiring,
N26,
If values are OK:
B33 |
| 24.0 |
|
ATA status/towing protection switch
(S85/3)
Actual values
(with anti-tow protection) |
|
|
|
HHT actual values:
ATA status/towing protection switch (S85/3)
button not pressed:
S85/3 button pressed: |
|
24.1 |
| 24.1 |
|
Function |
8 |
N26
|
1
|
Use bridges with 124 589 37 63 00 safety cables only.
|
LED in switch illuminates. |
Wiring,
S85/3,
If values are OK:
N26 |
Printable
version
