IV Fault display – fault indicator
Calibration software can recognize various faults in the system. Each fault has its corresponding priority and flash
code. The flash code of the fault of highest priority will be displayed by the fault indicator.
The flash code consists of a sequence of short pulse (0.5 second) and a long pulse (1.5 second). See the following
figure.
The number of short pulse is exactly same with the grade number of priority. The fault with the highest priority is of
the smallest priority grade number. For example, fault caused by excessive current is of the highest priority, but with
smallest grade number of priority. This means that the fault indicator will display two short pulses and then a long
pulse. Meanwhile, any other fault (of the lower priority) will not be displayed by the fault indicator.
Fault grade
(Priority)
Fault reason Fault type
2 Excessive current(Electric EGR valve) Self-healing
3 Position sensor of Electric EGR Self-healing
4 TPS position sensor Self-healing
5 Sensor for Water temperature Self-healing
6 Deviation of controller(PID) Without self-healing
9 Fault of electric EGR valve(high zero point) Without self-healing
Some faults may be self-healing but some can not be self-healing. The faults which can not be self-healing have to be
resolved by resetting system, for example, extinction, reignition. Please refer to all the faults listed in the table.
13.10
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