Chery A11 2003 User Manual

Maintenance Manual for Chery·Windcloud Marelli EFI System
Failure: too high circuit voltage of throttle position sensor
Step Operation Result Solution
1
Connect scanner and commutator, and then turn
ignition switch to “ON”.
Go to next step
Yes Go to next step
2
Check Throttle Absolute Opening in data stream to
see if it is 4%-10% (depends on specific car model).
No Go to Step 5
Yes Go to next step
3
Slowly step down accelerating pedal to dead
position and observe Throttle Absolute Opening in
data stream to see if it increases to 85-95% (depends
on specific car model) along with opening of
throttle.
No Go to Step 5
Yes Replace sensor
4
Repeat Step 3 and check Throttle Absolute Opening
in data stream to see if it jumps when changing.
No Go to next step
Yes
Repair or
replace wire
harness
5
Unplug throttle position sensor connector from wire
harness, and respectively check the connections
between Pin 54 of ECU and Pin 1 of sensor
connector, Pin 60 of ECU and Pin 2 of sensor
connector, Pin 76 of ECU and Pin 3 of sensor
connector to see if open or short circuit occurs.
No Go to next step
Yes Replace sensor
6
Check the voltage between Pin 1 and Pin 2 of
sensor connector with a multimeter to see if it is
around 5V (standard voltage of water temperature
sensor).
No
Diagnosis
Instruction
Failure: signal circuit error of upstream oxygen sensor
Step Operation Result Solution
1
Connect scanner and commutator, and then turn
ignition switch to “ON”.
Go to next step
Yes
Diagnosis
Instruction
2
Start engine and idle it until coolant temperature is
normal. Observe Oxygen Sensor Voltage to see if
the indication quickly changes between
100mV-900mV (at least 5 changes within 10
seconds).
No Go to next step
Yes
Repair or
replace wire
harness
3
Check respectively the connections between Pin 20
of ECU and Pin A of sensor connector, Pin 9 of
ECU and Pin B of sensor connector (two thin wires
on ECU wire harness, the two thick wires are
heating coils) to see if they are short circuit to
ground.
No Go to next step
4
A. Check intake system for severe air leakage;
B. Check injectors for blockage;
Yes
Repair as per
diagnosis
19

Chery A11 2003 Specifications

General

Brand	Chery
Model	A11 2003
Category	Automobile
Language	English