Iveco NEF TIER 2 SERIES Workshop Manual

A successful troubleshooting is carried out with the competence acquired by years of experience and attending training courses. When the user complains for bad efficiency or working anomaly, his indications must be kept into proper consideration using them to acquire any useful information to focus the intervention.

Iveco NEF TIER 2 SERIES Service Manual
After the detection of the existing anomaly, it is recommended to proceed with the operations of troubleshooting by decoding the auto-troubleshooting data provided by the EDC system electronic central unit. The continuous efficiency tests of the components connected to, and the check of working conditions of the entire system carried out during working, can offer an important diagnosis indication, available through the decoding of the ”failure/anomaly” codes issued by blinking of the failure led: the ”blink-code” (whether programmed). Please consider that the interpretation of the indications provided by the blink-code is not sufficient to guarantee the solution to the existing anomalies.

Using Iveco Motors processing instruments, it is also possible to establish a bi-directional connection with the central unit, by which not only to decoding the failure codes but also input an enquiry relying on memory files, in order to achieve any further necessary information to identify the origin of the anomaly.

Iveco NEF TIER 2 Workshop Manual
Every time there is a breakdown claim and this breakdown is actually detected, it is necessary to proceed inquiring the electronic unit in one of the ways indicated and then proceed with the diagnostic research making trials and tests in order to have a picture of the working conditions and identify the root causes of the anomaly.

In case the electronic device is not providing any indication, it will be necessary to proceed relying on the experience, adopting traditional diagnosis procedures. In order to compensate the operators’ lack of experience in this new system, we are hereby providing the USER’s GUIDELINE FOR TROUBLESHOOTING in the following pages.

The GUIDELINE is composed of three different parts:
Blink Code, relating to the anomalies identified by the gearbox, mainly of electric and electrical nature
Troubleshooting guide using PT-01 portable tester. Tool identified as IVECO p/n 8093731.
Guideline for troubleshooting without blink code, divided per symptoms, describing all possible anomalies not detected by the electronic gearbox, often of mechanical and hydraulic nature.

Blink code
This is the preliminary information that the electronic control unit gives the operator (with a blink code) about any trouble with the system. The blink-code test button, blink-code signal request button and 19 pole connector for the PT-01 instrument are integrated in the interface box.

BLINK CODE activation / reading
The blink code is activated by pressing the BLINK CODE button inside the interface box. The BLINK CODE identifies one problem at a time without distinguishing between present and intermittent faults. To display all the codes in memory you need to activate the BLINK CODE button several times. The code is composed of two digits and is displayed with slow blinks followed by fast blinks. If there are no faults in the system, the EDC indicator light will give no information and come on just once. Each time the key is turned ”ON”, the EDC indicator light has to come on; if this does not occur, check the wiring and indicator light.

PT-01 PORTABLE TESTER
Using PT-01 with portable tester it is possibile to execute troubleshooting and test the EDC7 electronic module of NEF engines. PT-01 has been designed and developed to ensure stoutness and practicality and is particularly suitable to be used in workshop and industrial environment. The tool is connected to the engine gearbox by means of one only cable providing both tester feed and communication with the electronic module.

Checking cylinder head supporting surface
Distortion found along the whole cylinder head shall not exceed 0.20 mm. If higher values are found grind the cylinder head according to values and indications shown in the following figure.