Iveco Daily. Manual — part 393
Four parallel channel system (II)
Electro-hydraulic modulator/control unit
1. Hydraulic accumulator
-- 2. Electro-hydraulic modulator -- 3. Electronic control unit -- A. ABS8 connector -- B. ESP8
connector
-- MC1. Front axle power supply -- MC2. Rear axle power supply -- LF (or FL with ABS8/ESP8 systems). Left front
axle output
-- RR. Right rear axle output -- RF (or FR with ABS8/ESP8 systems). Right front axle output -- LR (or RL with
ABS8/ESP8 systems). Left rear axle output
102114
Figure 131/2
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ELECTRIC/ELECTRONIC SYSTEM
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Revi - February 2005
ABS 8 control unit PIN OUT (X - crossed channels, II - parallel channels)
102245
Figure 131/3
ELECTRIC/ELECTRONIC SYSTEM
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Pin (X)
Pin (II)
Function
Cable
1
1
Earth (pump control motor)
0000
2
2
Positive after fuse (pump control motor power supply enable relay)
7772
3
3
Positive after fuse (valve lock power supply enable relay)
7772
4
4
Signal earth
0000
5
5
Front left sensor
5570
6
16
-
-
7
7
Rear left sensor
5572
8
8
Rear right sensor earth
5573
9
9
Front right sensor earth
5571
10
10
Front right sensor
5571
11
11
Diagnosis K line
2299
12
12
EBD failure warning light
6673
13
13
Decelerator deactivation with ABS system ON
0315
14
14
-
-
15
15
CAN L line
Green
16
6
Front left sensor earth
5570
17
17
Rear left sensor earth
5572
18
18
Positive after fuse for ABS (KL 15)
8847
19
19
Rear right sensor
5573
20
20
Stop signalling switch — brake lights
1173
21
21
-
-
22
22
ABS failure warning light
6670
23
23
-
-
24
24
-
-
25
25
Diagnosis L line
1199
26
26
CAN H line
White
ESP 8 control unit PIN OUT (X - crossed channels, II - parallel channels)
102246
Figure 131/4
132/6
ELECTRIC/ELECTRONIC SYSTEM
D
AILY
Revi - February 2005
Pin (II)
Function
Cable
1
1
Earth (pump control motor)
0000
2
2
Positive after fuse (pump control motor power supply enable relay)
7772
3
3
Positive after fuse (valve lock power supply enable relay)
7772
4
4
Signal earth
0000
5
5
Front left sensor
5570
6
26
-
-
7
7
Rear left sensor
5572
8
8
Rear right sensor earth
5573
9
9
Front right sensor earth
5571
10
10
Front right sensor
5571
11
11
Diagnosis K line
2299
12
12
EBD failure warning light
6673
13
13
-
-
14
14
CAN L line
Green
15
15
Yaw sensor earth
9096
16
16
Yaw sensor signal
9095
17
17
Longitudinal acceleration sensor
9099
18
18
Yaw sensor reference signal
9094
19
19
Voltage stabilization signal to the acceleration sensor
9091
20
20
Side acceleration sensor signal
9092
21
21
Side acceleration sensor signal earth
0050
22
22
Decelerator deactivation with ABS system ON
0315
23
23
-
-
24
24
Diagnosis L line
1199
25
25
-
-
26
6
Front left sensor earth
5570
27
27
Rear left sensor earth
5572
28
28
Positive after fuse for ABS (KL 15)
8847
29
29
Rear right sensor
5573
30
30
Stop signalling switch — brake lights
1173
31
31
Exhaust brake actuation enable switch (ASR/ESP passive switch)
8800
32
32
ABS failure warning light
6670
33/34
33/34
-
-
35
35
CAN H line
White
36
36
Hand brake ON signal
6662
37
37
Yaw sensor test signal
9093
38/39/40
38/39/40
-
-
41
41
Stop signalling switch
1173
42
42
-
-
43
43
Reverse gear signal
2227
44/45
44/45
-
-
46
46
Speed limiter or ASR failure warning light
6672
ESP (Electronic Stability Program) operation
The ESP function controls the vehicle’s stability and side dynamics.
The main goals of this function are as follows:
- to improve stability, especially in understeering and oversteering conditions;
- to reduce the braking distance in line change conditions and on slippery roads.
The ESP function evaluates the following driver’s requests:
-
steering-wheel position;
-
wheel revs number (speed);
-
pressure on the brake pedal or accelerator position.
The ESP control unit microprocessor recognizes the specific manoeuvre and examines the vehicle’s behaviour:
-
degree of yaw;
-
wheel revs number;
-
transverse acceleration.
The microprocessor assesses the running behaviour based on the data provided, and the ESP comes into operation by acting
on the brakes.
The hydraulic modulator controls brake pressure for every single wheel as quick as possible.
The ESP may, through engine management, reduce the number of revolutions of the engine itself, in order to withstand vehicle
deceleration.
The ESP system is always active in the background, i.e. it compares the actual vehicle ride with the driver’s desired ride 50 times
a second.
Control strategy
Sudden obstacle
102246
1) Acting on the steering-wheel suddenly: danger of understeering.
2) The ESP brakes the rear left wheel
⇒ the vehicle follows the steering command.
3) The driver countersteers: Danger of oversteering
⇒ The ESP brakes the front left wheel.
4) The vehicle recovers stability.
Figure 131/5
ELECTRIC/ELECTRONIC SYSTEM
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