Maintenance Manual for Chery·Windcloud Marelli EFI System
of knock sensor connector and Pin 70 of ECU to see
if open, short circuit to power/ground occurs.
No Go to next step
Yes
Diagnosis
Instruction
4
Replace knock sensor as per specification, trial run
the engine at a speed higher than 2200RPM.
Recheck to see if failure code occurs again
(meanwhile check shield wire of knock sensor to
see if it is normally connected to Pin 63 of ECU).
No
Check to see if
it is random
failure
Failure: signal error of crankshaft position sensor
Step Operation Result Solution
1
Connect scanner and commutator, and then turn
ignition switch to “OFF”.
Go to next step
Yes Go to next step
2
Unplug engine speed sensor connector from wire
harness, check the resistance between Pin 2 and Pin
3 of engine speed sensor with a multimeter to see if
it is around 1260Ω at 20℃.
No Replace sensor
Yes
Repair or
replace wire
harness
3
Check repectively the connections between Pin 2 of
engine speed sensor and Pin 53 of ECU, Pin 3 of
engine speed sensor and Pin 67 to see if open, short
circuit to power/ground occurs.
No Go to next step
Yes
Diagnosis
Instruction
4
Check signal panel of flywheel to see if it is in good
condition.
No
Replace signal
panel
Failure: improper signal from crankshaft position sensor”
Step Operation Result Solution
1
Connect scanner and commutator, and then turn
ignition switch to “OFF”.
Go to next step
Yes Go to next step
2
Unplug engine speed sensor connector from wire
harness, check the resistance between Pin 2 and Pin
3 of engine speed sensor with a multimeter to see if
it is around 1260Ω±10% at 20℃.
No Replace sensor
Yes
Repair or
replace wire
harness
3
Check repectively the connections between Pin 2 of
engine speed sensor and Pin 53 of ECU, Pin 3 of
engine speed sensor and Pin 67 to see if open, short
circuit to power/ground occurs.
No Go to next step
Yes
Diagnosis
Instruction
4
Check signal panel of flywheel to see if it is in good
condition.
No
Replace signal
panel
26
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