JAC J2 - Page 217



Maintenance Manual for J2 Sedan
Electronic Control System
of Engine
216
Fault code: P0327 “the circuit voltage of knocking sensor signal is too low”
S/N
Step
Check
result
Subsequent
step
1
Connect the diagnosis device and adapter, and turn the ignition switch
to OFF position.
Next step
Y
es
Next
step
2
Unplug the knocking sensor connector on the harness, and check if
the resistance between Pins 1# and 2# of knocking sensor is higher
than 1MΩ by the multimeter.
No
Replace the
sensor
Yes
Repair or replace
the harness
3
Check if the circuits connecting to Pins 1# and 2# of knocking sensor
connector to Pins 30# and 31# of ECU are open or short to power
source or ground.
No
Next step
Y
es
Diagnosi
s
help
4
According to the specifications, replace the knocking sensor, test the
car and make engine rotation speed higher than 2200rpm. Check if
the fault code P0327 appears again.
No
Check if it is a
sporadic fault
Fault code: P0328 “the circuit voltage of knocking sensor signal is too high”
S/N
Step
Check
result
Subsequent
step
1
Connect the diagnosis device and adapter, and turn the ignition switch
to OFF position.
Next step
Y
es
Next
step
2
Unplug the knocking sensor connector on the harness, and check if
the resistance between Pins 1# and 2# of knocking sensor is higher
than 1MΩ by the multimeter.
No
Replace the
sensor
Yes
Repair or replace
the harness
3
Check if the circuits connecting to Pins 1# and 2# of knocking sensor
connector to Pins 30# and 31# of ECU are open or short to power
source or ground.
No
Next step
Y
es
Diagnosi
s
help
4
According to the specifications, replace the knocking sensor, test the
car and make engine rotation speed higher than 2200rpm. Check if
the fault code P0328 appears again.
No
Check if it is a
sporadic fault
Fault code: P0340 “the mounting position of phase sensor is incorrect”
S/N
Step
Check
result
Subsequent
step
1
Connect the diagnosis device and adapter, and turn the ignition switch
to ON position.
Next step
Y
es To
Step
4
2
Unplug the phase sensor connector on the harness, and check if the
voltage between Pins 3# and 1# of this connector is about 12V by the
multimeter.
No
Next step
Yes
Repair or replace
the harness
3
Check if the circuit connecting Pin 3# of phase sensor to Pin 87# of
main relay is open or short to
ground.
Check if Pin
1# of phase sensor
is grounded improperly
.
No
Next step