Iveco Stralis AT/AD. Manual — part 339
This normally open electro valve consists of a power coil and a discharge.
It is used to modulate braking pressure when wheel tendency to lock is detected by the speed sensor.
Vehicles with the EBS system feature two of them to control the front axle.
35805
000821t
Compressed air connections
1
Proportional relay power
2
Axle brake cylinder output
3
Discharge
000805t
Electrical connections
Right wheel
6.1 Positive for discharge coil (ECU X3 pin 1)
6.2 Common negative (ECU X3 pin 3)
6.3 Positive for power coil (ECU X3 pin 2)
Left wheel
6.1 Positive for discharge coil (ECU X4 pin 10)
6.2 Common negative (ECU X4 pin 12)
6.3 Positive for power coil (ECU X4 pin 11)
PERSPECTIVE VIEW
WIRING DIAGRAM
III.140
ELECTRONIC SYSTEMS
S
TRALIS
AT/AD
Base - January 2003
This component consists of an electrical circuit, two N.C. power electro valves, two N.A. discharge electro valves and two pressure
sensors.
The electrical circuit receives and processes signals from the axle speed, pressure and basket wear sensors and transmits them
to the electronic center dedicated CAN line, which can perform the following, depending on information received from the
electronic center:
Modulate braking pressure (EBS function)
Limit pressure based on load (EBL function)
Modulate pressure based on load (EBL function)
Lock wheels (ABS function)
Modulate braking pressure to prevent wheel slip (ASR function)
60934
WIRING DIAGRAM
PERSPECTIVE VIEW
002057t
ELECTRONIC SYSTEMS
III.141
S
TRALIS
AT/AD
Axle electro-pneumatic modulator (88006)
000823t
Compressed air connections
11 -
Power from axle reservoir
12 -
Power from axle reservoir
21 -
Output for left axle brake cylinder
22 -
Output for right axle brake cylinder
3
-
Venting to outside air
Electrical connections:
61.1 - Power positive (ECU X2 pin 7)
61.2 - Common negative
61.3 - CAN line (ECU X2 pin 4)
61.4 - CAN line (ECU X2 pin 1)
62.1 - Right wheel speed signal
62.2 - Right wheel speed signal
63.1 - Left wheel speed signal
63.2 - Left wheel speed signal
66.1 - Right wear sensor positive (pin A)
66.2 - Right wear sensor negative (pin B)
66.3 - Right wear sensor signal (pin C)
67.1 - Left wear sensor positive (pin A)
67.2 - Left wear sensor negative (pin B)
67.3 - Left wear sensor signal (pin C)
III.142
ELECTRONIC SYSTEMS
S
TRALIS
AT/AD
Base - January 2003
002052t
60934
WIRING DIAGRAM
PERSPECTIVE VIEW
ELECTRONIC SYSTEMS
III.143
S
TRALIS
AT/AD
Axle electro-pneumatic modulator (for 4x2 e 6x2 carriages)
This component consists of an electrical circuit, two N.C. power electro valves, two N.A. discharge electro valves, two pressure
sensors and two stop double electro valves.
The electrical circuit receives and processes signals from the axle speed, pressure and basket wear sensors and transmits them
to the electronic center dedicated CAN line, which can perform the following, depending on information received from the
electronic center:
-
Modulate braking pressure (EBS function)
-
Limit pressure based on load (EBL function)
-
Modulate pressure based on load (EBL function)
-
Lock wheels (ABS function)
-
Modulate braking pressure to prevent wheel slip (ASR function)
-
Guarantee compressed air braking in electrical system breakdown conditions
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