Maintenance Manual for Chery·Windcloud Marelli EFI System
Failure: injector circuit error in Cylinder 3
Step Operation Result Solution
1
Connect scanner and commutator, and then turn
ignition switch to “ON”.
Go to next step
Yes Go to Step 4
2
Unplug Cylinder 3 injector connector from wire
harness, check the voltage between Pin 1 of the
connector and cathode of power supply with a
multimeter to see if it is around 12V.
No Go to next step
Yes
Repair or
replace wire
harness
3
Check the connection between Pin 1 of Cylinder 3
injector connector and main relay to see if open
circuit or short circuit to ground occurs.
No Go to next step
Yes Go to next step
4
Check the resistance between Pin 1 and Pin 2 of
Cylinder 3 injector with a multimeter to see if it is
around 11-16Ω at 20℃.
No
Replace
injector
Yes
Diagnosis
Instruction
5
Check the voltage between Pin 2 of Cylinder 3
injector connector and cathode of power supply
with a multimeter to see if it is around 3.7V.
No Go to next step
Yes
Repair or
replace wire
harness
6
Check the connection between Pin 2 of Cylinder 3
injector connector and Pin 78 of ECU to see if open,
short circuit to power/ground occurs.
No
Diagnosis
Instruction
Failure: injector circuit error in Cylinder 4
Step Operation Result Solution
1
Connect scanner and commutator, and then turn
ignition switch to “ON”.
Go to next step
Yes Go to Step 4
2
Unplug Cylinder 4 injector connector from wire
harness, check the voltage between Pin 1 of the
connector and cathode of power supply with a
multimeter to see if it is around 12V.
No Go to next step
Yes
Repair or
replace wire
harness
3
Check the connection between Pin 1 of Cylinder 4
injector connector and main relay to see if open
circuit or short circuit to ground occurs.
No Go to next step
Yes Go to next step
4
Check the resistance between Pin 1 and Pin 2 of
Cylinder 4 injector with a multimeter to see if it is
around 11-16Ω at 20℃.
No
Replace
injector
5 Check the voltage between Pin 2 of Cylinder 4
injector connector and cathode of power supply
Yes
Diagnosis
Instruction
24
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