Iveco Daily. Manual — part 349
Figure 48
These are the error codes that can appear on the display of the panels during diagnosis in place of “Cli” .
000279t
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Error codes
12
Blown air sensor circuit short to ground
14
Blown air sensor circuit open or short
32
Outside air temperature sensor positive short to ground
34
Outside air temperature sensor circuit open or short
42
Inside air temperature sensor positive short to ground
44
Inside air temperature sensor circuit open or short
52
Evaporator temperature sensor positive short to ground
54
Evaporator temperature sensor circuit open or short
65
Air mixing ratio-motor malfunctioning
82
Required temperature potentiometer positive short to ground
84
Required temperature potentiometer circuit open or short
92
Ventilation control potentiometer positive short to ground
94
Ventilation control potentiometer circuit open or short
B2
Air mixing potentiometer signal positive short to ground
B4
Air mixing potentiometer signal circuit open or short
D5
Fan control electronic module malfunctioning
E2
Potentiometer powering 10 ECU pin positive short to ground
E3
Potentiometer powering 10 ECU pin short to positive
F6
Supply voltage higher than max. limit
F7
Supply voltage lower than min. limit
The above figure shows 99331048 ER1 + ER2 tool connection to ventilation and heating system ECU and to IWT.
Detail (A) shows IVECO TESTER connection.
61545
Figure 49
IWT can measure lines on control unit wiring and pin-out.
With MODUS, this measurement can only be performed using UNITESTER.
NOTE
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Diagnosis by IWT, MODUS and UNITESTER
61546
Figure 50
Diagnosis by IWT
Preliminary operations
IWT software memorises the list of components and the relevant failures and enables their reading on the particular screen displays.
It also enables to analyse for every type of failure the measurement in Kohm or Mohm for every component circuit and it displays
in any case the optimum operation parameters.
It also displays operation procedure by the REPAIR function.
Repair manual using IWT will be added in next edition.
It is however important to remind that before proceeding with troubleshooting diagnosis, the following three main factors shall
be checked:
1. Identification:
Check and prove control unit identity consistency between vehicle and IWT data.
If the control unit is not of the preset type, ”not compatible control unit” message is displayed.
Therefore, diagnosis cannot be correct.
IDENTIFICATION
PARAMETERS
FAILURES
MARELLI AIR-CONDITIONER
AIR-CONDITIONER
35C13/P
MARELLI SOFTWARE
509300500000
MARELLI SOFTWARE DATE
04-12-97
IVECO H.W.
0500326588
IVECO H.W. DATE
02-05-97
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61547
Figure 51
2. Failures:
If failures are found, follow repair procedure shown on the screen display using the proper icons.
If no failure is found, perform check by screen display ”PARAMETERS” (see point 3).
FAILURES
PARAMETERS
IDENTIFICATION
INTERMITTENT
CURRENT
POTENTIOMETERS
SENSORS
MIXING MOTOR
MIXING MOTOR
RE
PAI
R
CONDITIONS
LIST
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