| Test step |
DTC |
Test scope
|
Test connection
|
Test condition
|
Nominal value
|
Possible cause/Remedy
|
| 1.0 |
|
Base module (N16/1)
Voltage supply
Circuit 30 |
28  29 |
|
 1 1 |
|
- |
|
11 - 14 V |
Wiring,
Battery (G1),
Model 129
Ground (module box bracket) (W27)
Model 140
Ground (electronics output ground - right footwell) (W15)
|
| 2.0 |
|
Base module (N16/1)
Voltage supply
Circuit 15, unfused |
28 |
N16/1
|
15 |
|
Ignition: ON
Ignition: OFF
|
|
11 - 14 V
< 1 V |
Wiring,
Ignition/starter switch (S2/1)
|
| 3.0 |
|
Base module (N16/1)
Voltage supply
Circuit 15, fused
|
28 |
N16/1
|
11 |
|
Ignition: ON
Ignition: OFF
|
|
11 - 14 V
< 1 V |
Wiring |
| 4.0 |
|
Voltage supply (unfused)
for N4/1
|
28 |
N16/1
|
6 |
|
Ignition: ON
Ignition: OFF
|
|
11 - 14 V
< 1 V |
 2.0,
Base module (N16/1). |
| 5.0 |
|
Voltage supply (unfused)
for N3/4, N4/1, B2/5
|
28 |
N16/1
|
5 |
|
Ignition: ON
Ignition: OFF
|
|
11 - 14 V
< 1 V |
2.0,
Base module (N16/1). |
| 6.0 |
  |
Voltage supply (fused)
for N30 or N30/1, S9/1
|
28 |
N16/1
|
8 |
|
Ignition: ON
Ignition: OFF
|
|
11 - 14 V
< 1 V |
Fuse (F1) in base module (N16/1),
2.0,
Base module (N16/1). |
| 7.0 |
|
Voltage supply (fused)
for X11/4
|
28 |
N16/1
|
9 |
|
Ignition: ON
Ignition: OFF
|
|
11 - 14 V
< 1 V |
Fuse (F1) in base module (N16/1),
2.0,
Base module (N16/1). |
| 8.0 |
 |
Voltage supply (fused)
for N3/4
|
28 |
N16/1
|
10 |
|
Ignition: ON
Ignition: OFF
|
|
11 - 14 V
< 1 V |
2.0,
3.0,
Base module (N16/1). |
| 9.0 |
|
Voltage supply (fused)
for N49/1, N51, N15/1, S16/9, S45/1
|
28 |
N16/1
|
27 |
|
Ignition: ON
Ignition: OFF
|
|
11 - 14 V
< 1 V
|
Fuse (F3) in base module (N16/1),
2.0,
Base module (N16/1). |
| 10.0 |
|
Idle speed increase signal
for N3/4, N4/1
|
28 |
N16/1
|
32 |
|
Engine: at Idle
 |
|
10 - 14 V
< 1 V
|
11.0,
12.0,
2.0,
Base module (N16/1). |
| 11.0 |
|
A/C compressor RPM sensor signal (A9l1) |
40 |
N16/1
|
41
|
15
|
Engine: at Idle
 |
20
|
Model 129
> 0.30 V~
Model 140
> 0.04 V~ |
11.1
|
| 11.1 |
|
Resistance |
40
|
N16/1
|
41
|
|
Ignition: OFF
Disconnect base module (N16/1) from contact box. |
|
Model 129
530 - 900 
Model 140
165 - 205 |
Wiring,
A9/1. |
| 12.0 |
|
A/C "ON" signal
from A/C pushbutton control module (N22) |
39
|
N16/1
|
1
|
|
Ignition: ON
|
|
11 - 14 V
< 2 V
|
Wiring,
See DM, Climate Control, Vol. 1, section 3.1 or 3.2 >23 |
| 13.0 |
|
A/C compressor electromagnetic clutch (A9k1)
Voltage supply
Circuit 15 |
28
|
N16/1
|
20
|
|
Engine: at idle
|
|
11 - 14 V
< 2 V
|
11.0,
2.0,
Base module (N16/1). |
| 14.0 |
|
RPM signal TN (input)
from engine control module (N3/4)
|
28
|
N16/1
|
31
|
|
Engine: at Idle
|
|
>3 V~ |
Wiring,
N3/4,
Base module (N16/1). |
| 15.0 |
Model 129 only |
Module box blower
motor (M2/2) 1)
Voltage supply |
28
|
N16/1
|
19
|
|
Engine: start
RPM > 1500 rpm |
|
11 - 14 V
only for approx. 1.5 seconds after reaching 1500 rpm
|
Wiring,
14.0,
2.0,
Base module (N16/1). |
| 16.0 |
|
Kickdown switch (S16/6)
Voltage supply
|
28
|
N16/1
|
36
|
|
Engine: at Idle
Engine: OFF
|
|
11 - 14 V
< 1 V |
14.0,
2.0,
Wiring,
Base module N16/1). |
| 17.0 |
|
Diagnostic output |
28 |
N16/1
|
33 |
|
Ignition: ON
|
|
10 - 14 V |
Wiring,
Base module (N16/1). |
| 18.0 |
|
Vehicle speed signal (VSS)
from ABS control module (N30) or ABS/ASR control module (N30/1)
|
28
|
N16/1
|
14
|
|
Ignition: ON
Raise vehicle
Turn right front wheel at
1 rev./second |
|
>3 V~
|
Wiring,
ABS DM, Chassis & Drivetrain, Vol. 2, section 6.1 or 6.2
>23,
ASR DM, Chassis & Drivetrain, Vol. 2, section 5.1 or 5.2
>23. |
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