Chery Tiggo 2009 Service Manual page 351

8.
CHECK THE MAF SENSOR
• Install all removed parts.
• Start engine.
• Check air flow signal in data stream with the X-431.
TERMINAL
ITEM
NO.
Air
37 flow
sensor
• If without the X-431, check voltage between MAF sensor terminal 5 and ground.
TERMINAL
ITEM
NO.
Air
37 flow
sensor
Is the signal voltage of MAF normal?
Yes >>
Go to the next step.
No >>
Replace the MAF sensor.
9.
CHECK DTC
• With the X-431 scan tool, read ECM DTCs.
• Refer to DTC Confirmation Procedure .
Is DTC P0103 still present?
Yes >>
Replace the ECM.
NOTE : The Immobilizer control module must be matched to the new ECM (See ECM Removal & Instal-
lation in Section 03 Electronic Engine Controls).
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
DATA
(AVERAGE
CONDITION
DC
VOLTAGE)
• Engine is
Approximately
running
322 kg/h
• ECT: 78°C
• Idle: 795
RPM
• IAT: 36°C
• IAT signal:
Approximately
1.88 V
1.39 V
DATA
(AVERAGE
CONDITION
DC
VOLTAGE)
• Engine is
running
• ECT: 78°C
• Idle: 795
Approximately
RPM
1.39 V
• IAT: 36°C
• IAT signal:
1.88 V
03
67
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