Maintenance Manual for J2 Sedan
Electronic Control System
214
Connect the diagnosis device and adapter, and turn the ignition switch
Next step
es
step
Start the engine and run the engine idly till the coolant temperature
reaches to the normal value.
Under all the work conditions, observe the change of the value of
“Oxygen sensor voltage” on the diagnosis meter, and at this moment,
check if the displayed value remains at 900mV or so for a long time
es
step
3
Connect the fuel pressure meter to the fuel system inlet pipe, and
observe if the fuel pressure remains at 350kPa or so under all the
Yes
Check if the circuits connecting Pins 39# and 45# of ECU
respectively to Pin 3# (relative to gray connecting wire of oxygen
sensor) and Pin 4# (relative to black connecting wire of oxygen
sensor) of sensor connector are short
Yes
5
fuel injector drips fuel.
B. Check if the exhaust pipe has
C. Check if the ignition timing is incorrect.
Fault code: P0201 “the control circuit of fuel injector of Cylinder 1# is open”
S/N
result
1
Connect the diagnosis device and adapter, and turn the ignition switch
es To
Unplug the connector of the fuel injector of Cylinder 1# on the
harness, and check if the voltage between Pin 1# of this connector
and the negative pole of power source is about 12V by the
Yes
Check if the circuit between Pin 1# of the fuel injector connector of
Cylinder 1# and the main relay is
es
step
Check if the resistance between Pins 1# and 2# of the fuel injector of
der 1
0
d 13
the mult
.
es
s
5
Check if the voltage between Pin 2# of the fuel injector of Cylinder
1# and the negative pole of power source is about 3.7V by the
Yes
6
Check if the circuit between Pin 2# of the fuel injector connector of
Cylinder 1# and Pin 50 of ECU is open or short to power source or
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