Chery Tiggo 2009 Service Manual page 759

10.
CHECK O SENSOR
2
• Connect O
sensor connector.
2
• Connect ECM connector.
• If with the X-431, reference data stream value.
• If without the X-431, as following.
− Start engine and warm it up to normal operating temperature.
− Turn ignition switch off.
− Start engine and keep the engine speed between 3.500 and 4,000 RPM for at least 1 minute.
− Let engine idle for 1 minute.
− Set digital multimeter probes between ECM terminal 60 and ground.
CHECK ITEM
Oxygen sensor
Is the check result normal?
Yes >>
Go to the next step.
No >>
Replace O sensor.
2
11.
CHECK DTC
• With the X-431 scan tool, read ECM DTCs.
• Refer to DTC Confirmation Procedure .
Is DTC 11 still present?
Yes >>
Replace the ECM.
No >>
The system is now operating properly.
Reassemble the vehicle and road test to verify the customers complaint is repaired.
Chery Automobile Co., Ltd.
DIAGNOSIS & TESTING
CHECK CONTENT
• Warm-up condition
• Become lean while
decelerate
• Warm-up condition
• Become rich while
accelerate
• Warm-up condition
• Check with O
sensor
2
signal
Decelerate from 4,000
RPM suddenly
Accelerate suddenly
Idle
2500 RPM
03
NORMAL VALUE
below 200 mV
600 - 1,000 mV
100 - 900 mV
600 - 1,000 mV
475
03–