Page 161 - Foton Workshop Manual - Auman EST-M

Diagnosis - Diagnosis-fault diagnosis of electronic and electrical parts DI - 107

c. Clearing of fault codes IN

● Clear the stored fault codes of current control unit.
● If the fault is an intermittent fault or a fault caused by abnormal operation (e.g. starting the solenoid valve DI
after pulling down the solenoid valve), the fault indicator lamp can’t go out quickly after removing the fault.A
this time, confirm whether the fault is an actual fault quickly by starting the engine after removing the fault
EG
code.

d. Reading of data flow (numerical analysis)
TR
● By reading the data flow indicated on diagnostic unit, any part needn’t be removed, because it’s allowed to

check the data values of switch, sensor and actuator, etc. Using the data stream read as the first step for trouble
AX
shooting is a method to short the diagnosis time
Tester display Tested item/range Normal state Remarks for diagnosis

Storage battery voltage - FR
Left front wheel speed sensor -
Left rear wheel speed sensor - ST
Right front wheel speed
-
sensor
BR
Right rear wheel speed sensor -

Left front solenoid valve (air
Switch on/off - BW
intake)
Left front solenoid valve
Switch on/off -
(exhaust) EL
Right front solenoid valve
Switch on/off -
(air intake)

Right front solenoid valve
Switch on/off -
(exhaust)

Left rear solenoid valve (air
Switch on/off -
intake)
Left rear solenoid valve
Switch on/off -
(exhaust)

Right rear solenoid valve (air
Switch on/off -
intake)

Right rear solenoid valve
Switch on/off -
(exhaust)
ABS working state -
ABS indicator -

e. Action test (actuating element test)
● Action test is a self-learning process of component, which doesn’t need the removal of any part. It’s a
learning process to perform the test of relay or actuator and other special operations, etc.

DI-107