EF.1-66
Fault code
:
P1530 “Failure with the loop of temperature sensor for air-conditioner evaporator
”
S.N. Operation
steps
Check
result
Follow-up steps
1
Connect with a diagnosis instrument, and place the ignition switch to the
OFF
”
position.
Next
step.
Yes
Continue to proceed until
6
2
Observe whether the item temperature of evaporator
”
in data stream is suitable
to the existing temperature of evaporator.
No
Next step.
Yes Next
step.
3
Pull out the plug to the temperature sensor of air-conditioner evaporator, use a
multimeter to verify the resistance value between Pin 1 and Pin 2 of the sensor
is corresponding to its temperature value.
No
Change the sensor.
Yes
Continue to proceed until
step 6.
4
Pull out the plug to the temperature sensor of air-conditioner evaporator from
the wiring harness, use a multimeter to verify the voltage value between Pin 1
and Pin 2 is about 5V.
No
Next step.
Yes
Repair or change the wiring
harness.
5
Check whether the loop between pin 35 &42 of ECU and Pin 1 &2 of sensor is
a broken loop, or short circuit to power supply or ground.
No
Next step.
Yes Diagnosis
help.
6
When the engine is running at idle-speed and the air-conditioner is opened,
observe the change of value corresponding to the item "temperature of
evaporator" on a diagnosis instrument, and the displayed value shall be
decreased accordingly when the temperature of evaporator is reduced.
No
Change the sensor.
Fault code
:
P1651
Failure with the control loop of engine fault indicator lamp
SVS
.
”
S.N. Operation
steps
Check
result
Follow-up steps
1
Connect with the diagnosis instrument, and place the ignition switch to the
OFF
”
position.
Next
step.
Yes
Continue to proceed until
step 6.
2
The item “actuator action test” displayed on diagnosis instrument may be used
to test the action of engine fault indicator lamp to observe it’s within a
flameout status or a lighting status.
No Next
step.
Yes Next
step.
3
Check whether the loop (on power supply end) of engine fault indicator lamp
is a broken circuit or short circuit to ground.
No
Change the sensor
Yes
Continue to proceed until
step 6.
4
Check whether the loop between the connector pin (on control end) of engine
fault indicator lamp and Pin 29 of ECU is a broken loop, or short circuit to
power supply or ground.
No Next
step.
Yes
Repair or change the wiring
harness.
5
Check whether the bulb of engine fault indicator lamp is able to work under a
normal condition.
No Next
step.
M7.9.7 system service &diagnosis flow process based on fault code
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