Chery A21 2005, Service Manual, Page: 356 / 475

CHERY
·
A21 SERVICE MANUAL ENGINE EFI SYSTEM
33
DTC P0112 Circuit voltage is much lower of the throttle position sensor
No. Operating steps Result Follow up steps
1
Connect the diagnostic tester and commutator, put the
ignition switch to
“
ON
”
Next step
Yes To step No. 5
2
Observe
“
air intake temperature
”
item in data flow, if it is
same temperature with air intake pipe(specific data is
correlated to the engine temperature at that time)
Notice: if the value is - 40 there is perhaps open circuit
℃
failure in the circuit.
No Next step
Yes Next step
3
Take off the joint of cable air intake temperature sensor,
check the resistance values using multimeter between
sensor connector No. 1 and No. 2 and check if it is
corresponding to its temperature (please reference the
related section of this service manual)
No Replace sensor
Yes To step 5
4
Take off the joint of cable air intake temperature sensor,
check the voltage between pin No.1 and pin No.2 by
multimeter and look if it is around 5V.
No Next step
Yes
Repair or
replace
cable
5
Check if it is open circuit or short circuit to power supply
between ECU pin No. 17, No. 40 and sensor connector
No.1, No.2
No Next step
Yes Diagnosis help
6
Start the engine at idle speed. Observe the value changes
of diagnostic tester
“
air intake temperature
”
, the value
should increase with the increase of the engine intake air.
No
Replace the
sensor
DTC: P0113 Temperature is much higher indicated by the air intake temperature sensor
No. Operating steps Result Follow up steps
1
Connect the diagnostic tester and commutator, put the
ignition switch to
“
ON
”
.
Next step
Yes To step No. 5
2
Observe
“
air intake temperature
”
item in data flow, if it is
same temperature with air intake pipe(specific data is
correlated to the engine temperature at that time)
Notice: if the value always is - 40 there is perhaps open
℃
circuit failure in the circuit.
No Next step
Yes Next step
3
Take off the joint of cable air intake temperature sensor,
check the resistance values using multimeter between
sensor connector No. 1 and No. 2 and check if it is
corresponding to its temperature (please reference the
related section of this service manual).
No Replace sensor
Yes To step 5
4
Take off the joint of cable air intake temperature sensor,
check the voltage between pin No.1 and pin No.2 by
multimeter and look if it is around 5V.
No Next step
PDF created with pdfFactory Pro trial version www.pdffactory.com