Iveco Daily. Manual — part 296
Revi - February 2005
86
REAR AIR SUSPENSIONS
D
AILY
Base - May 2004
REAR PNEUMATIC SUSPENSIONS - VB-TECHNIEK TYPE
Blink - code
Blink-code led is set between the rear part of the ECU and the electrocompressor box to which it is secured.
Each time the ignition key is turned to ”MAR”, the led goes on and then goes off after five seconds. The following situations can then
take place:
Led blinking
Failure
Check
Always OFF
Power
Fuses, power cable
Always ON
Level sensor
Sensor, levers and power cable operation
Fast blinking
Electrocompressor overload (if five minutes later
the elctrocompressor restarts, failure can be due to
air leak or vehicle use under overload conditions)
Air springs, compressor, pneumatic circuit
Slow blinking
Electrocompressor overload (manual lifting push
button have been depressed for more than two
minutes)
Never depress lifting push button for more than
two minutes
Dimmed light
Light dims out if levelling push buttons are de-
pressed at the same time or if one push button is
faulty
Push buttons and wiring, never depress the push
buttons at the same time
REAR PNEUMATIC SUSPENSIONS - WABCO TYPE
Certain electric or pneumatic failures can be detected through Modus, IT 2000 or E.A.SY..
In case of component assembling or replacement it shall be necessary to perform system setting to guarantee proper operation of
the entire system.
Diagnostic connector is set on the right side of the engine compartment. Use adapter 99331043 to connect with diagnostic
equipment.
According to detected failures, the red warning light set on the dashboard goes on as follows:
- FIXED LIGHT: indicates failures;
- BLINKING LIGHT: indicates electrocompressor excessive temperature
Blink-code
The Blink-Code system ”displays” one failure at a time. To identify every failure stored in the ECU it is therefore necessary to repeat
the code activation procedure several times.
The Blink-Code can be activated by grounding the Diagnostic socket line L (pin 2) for 2 seconds at least with ignition key set to ”MAR”.
Should line L be grounded for more than 5 seconds, the Blink-Code shall not be activated and ECU is reset for standard operation.
The Blink-Code consists of two figures (Tens and Units):
- Tens blinking
2 sec.
(Slow)
- Units blinking
0.5 sec.
(Fast)
REAR AIR SUSPENSIONS
87
D
AILY
Base - May 2004
FAILURE TYPE
FAILURE CODE
ECU
Checksum errors
Parameter error
01
Level sensor setting data error
02
ROM internal memory fault
03
WABCO data error
04
Level sensor value error
05
Pressure sensor setting data error
07
RAM memory fault
06
PIN 1 cut-off (battery power)
08
WABCO specific data
80
Internal relay valve fault
09
Vehicle speed signal (cut-off/short circuit to +Vbatt)
81
Level sensor failure: cut-off/short circuit to +Vbatt
RH rear level sensor
10
LH rear level sensor
11
Level sensor failure: short circuit to ground
RH rear level sensor
20
LH rear level sensor
21
Solenoid valve/relay failure: cut-off/short circuit to +Vbatt
Compressor relay
30
LH rear compressor solenoid valve
31
RH rear compressor solenoid valve
32
Intake/exhaust solenoid valve
35
Solenoid valve/relay failure: short circuit to +Vbatt
Compressor relay
40
LH rear compressor solenoid valve
41
RH rear compressor solenoid valve
42
Intake/exhaust solenoid valve
45
Plausibility during air bellows lifting/inflating
RH rear level sensor
50
LH rear level sensor
51
Plausibility during air bellows lowering/deflating
RH rear level sensor
60
LH rear level sensor
61
These pneumatic suspensions show high flexibility and significant
vibration damping. Their main characteristic is that the distance
between chassis and road level, irrespectively of vehicle load,
remains constant due to the effect of the automatic adjustment
of the system.
Electronic-control
pneumatic
suspensions
are
activated
automatically when starting the vehicle.
Electronic-control pneumatic suspensions enable, through the
proper push buttons located in the cab, to change manually the
distance between chassis and road level and therefore the
height of the vehicle load bed.
The following two types of pneumatic suspensions are
currently adopted:
- WABCO pneumatic suspensions for 29L - 35S vehicles
- VB - Techniek pneumatic suspensions for 35C - 40C - 45C
- 50C - 60C - 65C vehicles.
PNEUMATIC SUSPENSIONS - WABCO TYPE (for 29L - 35S vehicles)
WABCO system in addition to known advantages offered by
pneumatic suspension, enables the following:
- significant air consumption reduction;
- ready response to the different adjustment processes;
- friendly systems;
- high safety performance;
- complete system diagnostic.
The WABCO system controls automatically the rated level of
vehicle pneumatic suspensions.
The above mentioned operations are bound to preset
operating conditions and to the relevant system safety
requirements.
The ECU controls automatically the chassis level (distance from
road level), through the real values provided by sensors and
compares these values to the rated ones stored in its memory.
If the driving position is changed, the electronic control unit
governs the electro-pneumatic assemblies, by means of which
the actual level is corrected in relation to the nominal level set
or saved by the driver.
Figure 1
62350
88
REAR AIR SUSPENSIONS
D
AILY
Base - May 2004
Figure 2
62349
REAR AIR SUSPENSIONS
89
D
AILY
Base - May 2004
COMPONENT
Pneumatic supply unit
- Type: WABCO 415 403 402 0
Operating temperature
Max. operating pressure
Rated voltage
Pressure control
- 30ºC to 65ºC
12.7 bar
12V DC
14 to 17.1 bar
Level sensors
- Type: WABCO 441 050 012 0
ECU
- Type: WABCO 446 055 450 0
Rated voltage
12V
Double circuit load sensing valve (vehicles without ABS)
- Type : BOSCH NM/FV/98-347 (ref. 796803)
Ratio
0.15
Pneumatic actuator
- Type : ELLENA EE6492
Operating temperature
Operating pressure
- 20ºC to 80ºC
max 8 bar
Air tank (litres)
31
Rear air spring (Mod. 29 L - 35 S)
Max. diameter
Min. length
Max. length
171 mm
350 mm
150 mm
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