|
|
Test scope
|
Test connection
|
Test condition
|
Nominal value
|
Possible cause/Remedy
|
|
1.0
|
|
Engine control
module (IFI) (N3/7)
Voltage supply
Circuit 87 unfused
|
19
18
|
|
 37
55
|
Ignition:
ON
|
11 - 14 V
|
Wiring,
Relay module (K40)
(see Figure 1),
1.1
|
|
1.1
|
|
Ground, component compartment - right
(W16/6)
|
|
|
X12/3
X12/3
|
Ignition:
OFF
|
11 - 14 V
|
Ground W16/6,
Activation of holding relay, see
2.0
|
|
2.0
|
|
Holding relay activation
Terminal HRL
|
N3/7
26
|
|
X12/3
|
Ignition:
ON
Engine at: CTP (idle)
Engine
: Shut off
|
11 - 14 V
11 - 14 V for approx. 4 sec. then < 1 V
|
Wiring,
Relay module (K40),
Engine control module (IFI) (N3/7)
|
|
3.0
|
|
ECT sensor (B11)
Voltage
|
4
|
N3/7
|
23
|
Ignition:
ON
|
oC V
20 3.7
30 3.4
40 3.0
50 2.6
60 2.1
70 1.8
80 1.5
90 1.2
± 10%
|
Engine control module (IFI) (N3/7)
3.1
|
|
3.1
|
|
Resistance
|
4
|
N3/7
|
23
|
Ignition:
OFF
Disconnect connector on engine control module (IFI) (N3/7)
|
oC
20 2500
30 1700
40 1170
50 830
60 600
70 435
80 325
90 245
± 10%
|
Wiring,
3.2
|
|
3.2
|
|
B11
|
1
|
B11
|
2
|
Ignition:
OFF
Disconnect connector on
ECT sensor (B11)
|
oC
20 2500
30 1700
40 1170
50 830
60 600
70 435
80 325
90 245
± 10%
|
B11 (Figure 2)
|
|
4.0
|
|
IAT sensor (B17)
Voltage
|
4
|
N3/7
|
40
|
Engine:
At CTP (idle)
|
oC V
20 3.8
30 3.3
40 2.9
±5%
|
Engine control module (IFI) (N3/7),
4.1
|
|
4.1
|
|
Resistance
|
4
|
N3/7
|
40
|
Ignition:
OFF
Remove connector on engine control module (IFI) (N3/7)
|
oC
20 6060
30 3900
40 2600
±5%
|
Wiring,
4.2
|
|
4.2
|
|
B17
|
2
|
B17
|
1
|
Ignition:
OFF
Remove connector on
sensor B17 (Figure 3)
|
oC
20 6060
30 3900
40 2600
±5%
|
B17
|
|
5.0
|
|
Pressure sensor (B28)
Connect pressure tester with Y-fitting to pressure sensor
|
4
|
N3/7
|
22
|
Engine:
At CTP
Slowly increase engine speed to 2500 rpm
|
Voltage:
Drops
Vacuum:
Rises
|
Pressure line,
B28 (Figure 4),
6.1
|
|
5.1
|
|
Voltage supply
|
4
|
N3/7
|
45
|
Ignition:
ON
|
4.8 - 5.2 V
|
Engine control module (IFI) (N3/7),
Wiring.
|
|
6.0
|
|
CKP sensor (L5/6)
|
28
28
|
|
20
20
|
Engine:
At CTP
Test via oscilloscope.
Testing with Hermann Datascope is only possible during the start or shut-down
phase. With DACE tester, testing is possible during idle, during which the
time axis must be set to
25ms
and the voltage to
40 V AC
.
Engine:
At CTP
Test with multimeter only if oscilloscope is not available.
Cranking rpm: > 200 rpm
|
Signal: see
document: AD07.12-P-2000-07B
> 0.8 V~ increasing rpm = increasing voltage
> 0.3 V~
|
Installation position of sensor,
Dirt on sensor (metal chips),
Segments on flywheel,
6.1
|
|
6.1
|
|
Resistance of sensor L5/6
|
28
|
N3/7
|
20
|
Ignition:
OFF
Remove connector on engine control
module (N3/7)
|
680 - 1300
|
Connector L5/6x1 (see Figure 5),
Wiring.
|
|
7.0
|
|
Fuel quantity actuator (Y23/1)
Adjustment solenoid
|
36
54
|
|
37
37
|
Ignition:
ON
|
> 4.0 V max. for 30 seconds
|
7.1
,
N3/7
|
|
7.1
|
|
Resistance
|
36
54
|
|
37
37
|
Ignition:
OFF
Remove connector on engine control module
(IFI) (N3/7)
|
1.0 - 1.4
|
Connector (Y23/1x1) (Figure 6),
Wiring,
Y23/1
|
|
8.0
|
|
Fuel rack position sensor (Y23/1l1)
|
19
|
N3/7
|
9
|
Ignition:
ON
|
2.2 - 2.7 V
|
N3/7,
8.1
|
|
|
|
|
19
|
N3/7
|
10
|
Ignition:
ON
|
2.2 - 2.7 V
|
|
|
8.1
|
|
Resistance
|
46
10
|
|
9
9
|
Ignition:
OFF
Remove connector on engine control module
(IFI) (N3/7)
|
21 - 25
43 - 47
|
Connector (Y23/1x1)
Wiring,
Y23/1
|
|
9.0
|
|
IFI/DFI accelerator pedal
position sensor (R25/2)
|
6
|
N3/7
|
39
|
Ignition:
ON
CTP position:
Full load position:
|
0.3 ± 0.5 V
3.75 ± 4.75 V
|
Wiring,
R25/2 (Figure 7),
Engine control module (IFI) (N3/7)
|
|
9.1
|
|
CTP contact switch
(R25/2s1)
|
|
|
|
Ignition:
ON
CTP position:
Full load position:
CTP position:
Full load position:
CTP position:
Full load position:
|
> 4.5 V
<0.5 V
<0.5 V
> 4.5 V
<0.5 V
> 4.5 V
|
Wiring,
R25/2 (Figure 7),
Engine control module (IFI) (N3/7)
|
|
10.0
|
|
CC switch (S40)
SP Resume
V Decelerate/set
B Accelerate/set
A Off
Safety contact
|
|
|
|
Ignition:
ON
Switch S40s1 not actuated
Position:
RESUME
S40s2
Position:
DECELERATE
S40s3
Position:
ACCELERATE
Switch S40s4 not actuated
Position:
OFF
Switch S40s5not actuated
Position:
DECELERATE, ACCELERATE, RESUME, OFF
|
< 1 V
11 - 14 V
11 - 14 V
11 - 14 V
11 - 14 V
< 1 V
< 1 V
11 - 14 V
|
Wiring,
CC switch (S40).
|
|
11.0
|
|
Electrohydraulic shut-off actuator
(Y1/1)
Activation
|
18
|
N3/7
|
43
|
Engine:
At CTP (idle)
|
11 - 14 V
|
Engine control module (IFI) (N3/7),
11.1
|
|
11.1
|
|
Current draw
|
N3/7
43
|
|
X12/3
|
Ignition:
OFF
Control module removed
|
1.46 A
Electro-hydraulic shut-off actuator clicks audibly.
|
Wiring,
Connector,
11.2
|
|
11.2
|
|
Resistance
|
18
|
N3/7
|
43
|
Ignition:
OFF
Remove connector from engine control
module (IFI) (N3/7)
|
7.6 ± 8.6
|
Y1/1 (Figure 10).
|
|
12.0
|
|
Fuel temperature
sensor (Y1/1b1)
|
28
|
N3/7
|
3
|
Engine:
At CTP (idle)
|
oC V
20 3.9
30 3.5
40 3.0
50 2.6
|
Engine control module (IFI) (N3/7),
12.1
|
|
12.1
|
|
Resistance
|
4
|
N3/7
|
3
|
Ignition:
OFF
Remove connector on engine control module (IFI) (N3/7)
|
oC
20 2500
30 1700
40 1170
50 830
|
Wiring,
12.2
|
|
12.2
|
|
Y1/1b1
|
1
|
Y1/1b1
|
4
|
Ignition:
OFF
Remove connector on electrohydraulic shut-off actuator (Y1/1) (Figure 10)
|
oC
20 2500
30 1700
40 1170
50 830
|
Replace:
Electrohydraulic shut-off actuator (Y1/1).
|
|
13.0
|
|
CAN data bus
|
41
|
N3/7
|
5
|
Ignition:
OFF
|
58 - 62
|
Engine control module (IFI) (N3/7),
Data line,
13.1
|
|
13.1
|
|
CAN element in DAS control module
(N54/1)
Resistance
|
41
|
N3/7
|
5
|
Ignition:
OFF
Remove connector on engine control module (IFI) (N3/7).
|
115 - 125
|
Data line,
DAS control module (N54/1).
|
|
14.0
|
|
Preglow control
Communication wire between engine control module (IFI) (N3/7) and preglow
control
module (N14/2)
Resistance
|
N3/7
33
|
|
N14/2x1
2
(1.2)
|
Ignition:
OFF
Remove connector N14/2x1 from preglow control module (N14/2) (Figure 15).
|
< 1
|
Wiring,
N14/2,
N3/7
|
|
15.0
|
|
Preglow control module (N14/2)
Voltage supply
Circuit 30
|
W16/3
|
|
N14/2x3
(3)
|
Ignition:
OFF
|
11 - 14 V
|
Wiring,
15.1
|
|
15.1
|
|
Ground, left component compartment
(W16/3)
|
W16/3
|
|
N14/2x1
1
(1.1)
|
Ignition:
OFF
Remove connector on preglow control module (N14/2) (Figure 13)
|
< 1
|
Wiring,
Preglow control module (N14/2)
(Figure 14).
|
|
16.0
|
|
Glow plug failure
Glow plug and harness test
|
|
|
N14/2x2
1
(2.1)
2
(2.2)
3
(2.3)
4
(2.4)
5
(2.5)
6
(2.6)
|
Measure with DC current pickup.
Pull back protective
sleeve.
For each measurement, turn ignition key back to position 2 again.
|
7 - 25 A
The current draw is dependent on the coolant temperature.
|
Glow plugs,
Wiring,
Preglow output (N14/2)
(Figure 14),
Engine control module (IFI) (N3/7).
|
|
17.0
|
|
EGR lifting sender (B28/3)
|
20
|
N3/7
|
21
|
Engine:
at CTP
(idle)
If EGR was recirculated previously, a waiting time of 50 seconds must be
observed, after that, the values can be checked.
Accelerate briefly, then
Engine:
at CTP
(idle) for approx. 50 seconds
|
< 1.5 V
< 100 mbar
> 1.5 V
> 150 mbar
|
B28/3, (Figure 12).
|
|
17.1
|
|
|
20
|
N3/7
|
24
|
Ignition:
ON
|
4.8 - 5.2 V
|
Wiring
N3/7
|
|
18.0
|
|
Relay module (K40)
Voltage supply
|
Plug
B
5
|
K40
|
Plug
B
4
|
Ignition:
OFF
Disconnect connector
B
|
11 - 14 V
|
Check voltage supply,
Wiring,
Output ground, component compartment - right (W15/1),
Relay module (K40).
|
|
19.0
|
|
Control module
Circuit 15E
|
18
|
N3/7
|
47
|
Ignition:
ON
|
11 - 14 V
|
Check voltage supply,
Wiring,
X12/5
|
|
20.0
|
|
Pressure control flap
vacuum transducer (Y31/2)
Vacuum at outlet "OUT" of vacuum transducer (Y31/2)
|
53
|
N3/7
|
37
|
Engine:
at CTP
(idle)
1500 rpm
Accelerate briefly, vacuum and voltages drop. The test values are reference
values.
|
< 1.5 V
< 150 mbar
> 3 V
>300 mbar
< 1 V
< 100 mbar
|
Vent filter dirty,
Vacuum lines,
Wiring,
Y31/2 (see
 21
/2 ),
Engine control module (IFI) (N3/7)
|
|
21.0
|
|
Resonance intake manifold switchover
valve (Y22/6)/resonance intake manifold flap
Voltage
|
11
|
N3/7
|
37
|
Engine:
at CTP
(idle)
1300 - 2800 rpm
|
11 - 14 V
< 1 V
|
Engine control
module (IFI) (N3/7),
21.1.
|
|
21.1
|
|
Current draw
|
11
|
|
18
|
Ignition:
ON
|
0.36 A
|
Wiring,
Resonance intake manifold witchover valve (Y22/6)
(Figure 11).
|
|
22.0
|
|
Resonance intake manifold switch
(S35)
Voltage
|
18
|
N3/7
|
32
|
Engine:
at CTP
(idle)
1400 - 1600 rpm
|
11 - 14 V
< 1 V
|
N3/7,
22.1
|
|
22.1
|
|
Resistance
|
18
|
|
32
|
Remove connector on engine control
module (IFI) (N3/7)
|
> 20 k
|
Wiring,
Resonance intake manifold switch (S35) (Figure 13).
|
|
23.0
|
|
Resonance intake line switchover
valve (Y22/7) /resonance intake line flap
Voltage
|
51
|
N3/7
|
37
|
Engine:
at CTP
(idle)
3600 - 3800 rpm
|
11 - 14 V
< 1 V
|
Engine control module (IFI) (N3/7),
23.1
|
|
23.1
|
|
Current draw
|
51
|
N3/7
|
18
|
Ignition:
ON
|
0.36 A
|
Resonance intake line switchover
valve (Y22/7) (Figure 11),
Wiring.
|
|
24.0
|
|
Resonance intake line switch (S35/1)
Voltage
|
18
|
N3/7
|
12
|
Engine:
at CTP
(idle)
3600 - 3800 rpm
|
11 14 V
< 1 V
|
N3/7,
24.1
|
|
24.1
|
|
Resistance
|
18
|
|
12
|
Remove connector on engine control
module (IFI) (N3/7)
|
> 20 k
|
Wiring,
S35/1 (Figure 8).
|
|
25.0
|
|
Oil level switch (S43)
|
7
|
N3/7
|
37
|
Ignition:
ON
Note:
Engine oil level above minimum
|
11 - 14 V
|
Wiring,
S43
|
|
26.0
|
|
Circuit 50
|
13
|
N3/7
|
18
|
Start engine.
|
> 6 V
|
Wiring,
X26,
S2/2
|
|
27.0
|
|
EGR valve vacuum transducer (Y31/1)
Vacuum at outlet "OUT" of vacuum transducer
|
35
|
N3/7
|
37
|
Engine:
at CTP
(idle)
660 ± 50 rpm
If EGR was recirculated previously, a waiting time of 50 seconds must be
observed, after that, the values can be checked.
2000 ± 100 rpm
Accelerate briefly, vacuum and voltages drop. The test values are reference
values.
|
< 1.0 V
< 150 mbar
> 2 V
> 200 mbar
< 1.0 V
< 150 mbar
|
Vent filter dirty,
Vacuum lines,
Vacuum supply,
Wiring,
Vacuum transducer (Y31/1) (Figure 10),
Engine control module)
(IFI) (N3/7).
|
Printable version
