JAC J2 User Manual



Maintenance Manual for J2 Sedan
Electronic Control System
of Engine
209
Fault code: P0117 “the circuit voltage of engine coolant temperature sensor is too low”
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
6
2
Observe if the “Coolant temperature” in the data flow is equivalent to
the engine temperature (depending on the engine
temperature then).
Notice: if
the
displayed
value
is
always
-40
,
the
circuit
may
be
℃
open.
No
Next step
Y
es
Next
step
3
Unplug the connector of coolant temperature sensor on the harness,
and check if the resistance between Pins 1# and 2# of sensor
correspond
s to its
temperature by the multimeter (refer to
the relevant
section in this repair manual f
or the details).
No
Replace the
sensor
Y
es To
Step
6
4
Unplug the connector of coolant temperature sensor on the harness,
and check if the voltage between Pins 1# and 2# of this connector is
about 5v by the multimeter.
No
Next step
Yes
Repair or replace
the harness
5
Check if the circuits connecting Pins 40# and 41# of ECU
respectively to Pins 1# and 2# of sensor connector are open or short
to power source.
No
Next step
Y
es
Diagnosi
s
help
6
Start the engine and run the engine idly. Observe the change of the
“Coolant temperature” value on the diagnosis meter, and at this
moment the displayed value shall increase with the rising of engine
coolant.
No
Replace the
sensor
Fault code: P0118 “the circuit voltage of engine coolant temperature sensor is too high”
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
6
2
Observe if the “Coolant temperature” in the data flow is equivalent to
the engine temperature (depending on the engine
temperature then).
Notice: if
the
displayed
value
is
always
-40
,
the
circuit
may
be
℃
open.
No
Next step
Y
es
Next
step
3
Unplug the connector of coolant temperature sensor on the harness,
and check if the resistance between Pins 1# and 2# of sensor
correspond
s to its
temperature by the multimeter (refer to
the relevant
section in this repair manual f
or the details).
No
Replace the
sensor
Y
es To
Step
6
4
Unplug the connector of coolant temperature sensor on the harness,
and check if the voltage between Pins 1# and 2# of this connector is
about 5v by the multimeter.
No
Next step
Yes
Repair or replace
the harness
5
Check if the circuits connecting Pins 40# and 41# of ECU
respectively to Pins 1# and 2# of sensor connector are short to
ground.
No
Next step
Y
es
Diagnosi
s
help
6
Start the engine and run the engine idly. Observe the change of the
“Coolant temperature” value on the diagnosis meter, and at this
moment the displayed value shall increase with the rising of engine
coolant.
No
Replace the
sensor

JAC J2 Specifications

General

Brand	JAC
Model	J2
Category	Automobile
Language	English