2009 CHERY TIGGO check engine

Downloaded from www.Manualslib.com manuals search engine Check reference values between ECM terminals and ground under the following conditions:
ECM TERMINAL NO.ITEMCONDITIONDATA (DC VOLTAGE)
18 Upstream O
2sensor•
Engine is running
• Warm-up condition Approximately 0.1 V - 0.9
V (Change5-8times in10 seconds periodically)
28 (With EOBD)
4 (Without EOBD) Downstream O
2sensor
heating --
36 Sensor (GND) •
Warm-up condition
• Idle Approximately 0 V
48 (With EOBD)
1 (Without EOBD) Upstream O
2sensor
heating --
55 Downstream O
2sensor•
Engine is running
• Warm-up condition Approximately 100 mV
On Board Diagnostic Logic
• Self-diagnosis detection logic.
DTC NO. DTC DEFINITION DTC DETECTION
CONDITION POSSIBLE CAUSE
P0032 O
2sensor 1 heater control
circuit high Engine is running.•
Fuel quality
• Oxygen Sensor
•Harness or connectors
(The sensor circuit is open
or shorted)
• ECM
DTC Confirmation Procedure:
Before performing the following procedure, confirm that battery voltage is more than 12 V.
• Turn ignition switch off.
• Connect the X-431 scan tool to the Data Link Connector (DLC) - use the most current software available.
• Turn ignition switch on and select view data stream.
• Start engine and warm it up to the normal operating temperature.
• Turn ignition switch off and wait at least 10 seconds.
• Start engine and keep the engine speed 2000 RPM for at least 1 minute.
• Let engine idle for 2 minutes.
• If DTC is detected, go to Diagnostic Procedure - Step 1.
• If the DTC is not detected, the DTC condition is intermittent (See Diagnosis & Testing Diagnostic Help in Sec-
tion 03 Electronic Engine Controls).
NOTE :
While performing electrical diagnosis & testing, always refer to the electrical schematics for specific circuit
and component information.
DIAGNOSIS & TESTING
03
03–53Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Diagnostic Procedure
1.CHECK GROUND CONNECTIONS
• Turn ignition switch off.
• Loosen and retighten ground screws on the body (See Ground Inspection in Section 03 Electronic Engine Con-
trols).
• Inspect ground connections E-207 and E-208 mounting position (See Vehicle Wiring Harness Layout - Engine
Room Harness (With 1.6L/1.8L Engine) in Section 16 Wiring).
Is ground connections OK?
Ye s>>Go to the next step.
No
>>Repair or replace ground connections.
2.CHECK O2SENSOR ELECTRICAL CONNECTOR
• Disconnect the O
2sensor (1) electrical connector
E-004.
• Inspect the electrical connector for damage.
Is the electrical connector OK?
Ye s>>Go to the next step.
No
>>Repair or replace the electrical connector
as necessary.
3.CHECK O2SENSOR POWER SUPPLY CIRCUIT
• Turn ignition switch on.
• Check O
2sensor supply voltage between O2sen-
sor terminal 2 and ground in the O
2sensor electri-
cal connector E-004.
• Battery voltage should exist.
Is the check result normal?
Ye s>>Go to Step 5.
No
>>Go to the next step.
DIAGNOSIS & TESTING
BESM030017
LTSMD030029
03–54Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 4.DETECT MALFUNCTIONING PART
• Check the following:
With EOBD (1.6L and 1.8L) Front fuse and relay box H2, H5, F3, A1, A13, G5
Fuse 25, fuse 12, fuse 27, fuse 24
Without EOBD (1.6L) Front fuse and relay box H2, H5, H3, F3, A1, G2, G5
Fuse 23, fuse 12, fuse 27, fuse 22, fuse 25
Without EOBD (1.8L) Front fuse and relay box H2, H3, H5, F3, A1, A13, G5
Fuse 22, fuse 25, fuse 12, fuse 27, fuse 24
• Check the harness for an open or a short between the O
2sensor and fuse.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair or replace malfunctioning parts as necessary.
5.CHECK THE O2SENSOR HEATER CONTROL CIRCUIT FOR SHORT
• Turn ignition switch off.
• Disconnect ECM connector.
• Check harness continuity between ECM terminal and O
2sensor terminal.
• Continuity should exist.
• Check the control circuit of the sensor heater.
O2SENSOR ECM TERMINAL O2SENSOR TERMINAL
Upstream O
2sensor heater (With
EOBD) 48
1
Upstream O
2sensor heater (Without EOBD) 11
• Check harness short to power supply circuit.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair or replace circuit for a short to power in harness or connectors.
DIAGNOSIS & TESTING
03
03–55Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 6.CHECK THE O2SENSOR HEATER
• Check the resistance between O
2sensor heater terminals, component side.
TERMINAL NO. RESISTANCE
1 and 2 (including cable
and connector) Approximately 9

• Check the resistance between O
2sensor terminals, component side.
TERMINAL NO. RESISTANCE
1and3&4
(Continuity should notexist)
4and1&2
Is the check result normal?
Ye s>>Go to the next step.
No
>>Replace the O2sensor.
7.CHECK DTC
• With the X-431 scan tool, read ECM DTCs.
• Refer to DTC Confirmation Procedure.
Is DTC P0032 still present?
Ye s>>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.
DIAGNOSIS & TESTING
03–56Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Check reference values between ECM terminals and ground under the following conditions:
ECM TERMINAL NO.ITEMCONDITIONDATA (AVERAGE DC
VOLTAGE)
17 Sensor (GND)•
Engine is running
• Warm-up condition:
78°C
• Idle: 795 RPM
• IAT: 36°C
• IAT signal voltage: 1.88
V Approximately 0 V
33 Regulated sensor supply 1 5 V
37 Air flow sensor Approximately 322 kg/h
Approximately 1.39 V
73 Regulated sensor supply 1 5 V
On Board Diagnostic Logic
• Self-diagnosis detection logic.
DTC NO. DTC DEFINITION DTC DETECTION
CONDITION DTC SET
CONDITION POSSIBLE CAUSE
P0102 Mass or Volume Air
Flow (MAF) circuit
low input Ignition switch on or
engine is runningECM detected that
the input signal is
out of the
acceptable range.•
MAF sensor
• Intake air leaks
• Harness or
connectors (The
sensor circuit is open
or shorted)
• ECM
DTC Confirmation Procedure:
Before performing the following procedure, confirm that battery voltage is more than 12 V.
• Turn ignition switch off.
• Connect the X-431 scan tool to the Data Link Connector (DLC) - use the most current software available.
• Turn ignition switch on.
• With the scan tool, record and erase stored DTCs in the ECM.
• Start engine and warm it to normal operating temperature, then select view DTC and data stream.
• If the DTC is detected, the DTC condition is current. Go to Diagnostic Procedure - Step 1.
• If the DTC is not detected, the DTC condition is intermittent (See Diagnostic Help and Intermittent DTC Trou-
bleshooting in Section 03 Electronic Engine Controls for more information.
NOTE :
While performing electrical diagnosis & testing, always refer to the electrical schematics for specific circuit
and component information.
Diagnostic Procedure
1.CHECK GROUND CONNECTIONS
• Turn ignition switch off.
• Loosen and retighten ground screws on the body (See Ground Inspection in Section 03 Electronic Engine Con-
trols).
• Inspect ground connections E-207 and E-208 mounting position (See Vehicle Wiring Harness Layout - Engine
Room Harness (With 1.6L/1.8L Engine) in Section 16 Wiring).
Is ground connections OK?
Ye s>>Go to the next step.
No
>>Repair or replace ground connections.
DIAGNOSIS & TESTING
03–58Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 2.CHECK INTAKE SYSTEM
• Check the following:
Air duct
Vacuum hoses
Intake air passage between air duct and manifold
Is the check result normal?
Ye s>>Go to the next step.
No
>>Reconnect the connectors or replace the malfunctioning part.
3.CHECK MASS AIR FLOW (MAF) SENSOR ELECTRICAL CONNECTOR
• Disconnect the MAF sensor (1) electrical connector.
• Inspect the electrical connector for damage.
Is the electrical connector OK?
Ye s>>Go to the next step.
No
>>Repair or replace the electrical connector
as necessary.
4.CHECK THE MASS AIR FLOW (MAF) SENSOR POWER SUPPLY CIRCUIT
• Turn ignition switch on.
• Check voltage between MAF sensor terminal 2 and
ground in the MAF sensor electrical connector
E-009.
• Battery voltage should exist.
Is the check result normal?
Ye s>>Go to step 6.
No
>>Go to the next step.
DIAGNOSIS & TESTING
LTSMD030075
LTSMD030041
03
03–59Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 5.DETECT MALFUNCTIONING PART
• Check the following:
With EOBD Fuse 21, fuse 22, fuse 24, fuse 27
Front fuse and relay box H2, H3, F3, A1, A13, G5
Harness between air flow sensor and fuse
Without EOBD Fuse 21, fuse 24, fuse 27
Front fuse and relay box F3, A1, A13, G5
Harness between air flow sensor and fuse
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair or replace malfunctioning parts as necessary.
6.CHECK THE MAF SENSOR REFERENCE CIRCUIT
• Check voltage between MAF sensor terminal 4 and
ground in the MAF sensor electrical connector
E-009.
• 5 V should exist.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair or replace the circuit for an open
or short to ground in harness or connec-
tors.
If circuit is normal, go to the next step.
7.CHECK THE MAF SENSOR GROUND CIRCUIT FOR AN OPEN OR SHORT
• Turn ignition switch off.
• Disconnect ECM harness connector.
• Check harness continuity between MAF sensor terminal 3 and ECM terminal 17.
• Continuity should exist.
• Check harness for short to ground.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair or replace circuit for an open in harness or connectors.
DIAGNOSIS & TESTING
LTSMD030042
03–60Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 8.CHECK THE MAF SENSOR OUTPUT SIGNAL CIRCUIT FOR AN OPEN OR SHORT
• Check harness continuity between MAF sensor terminal 5 and ECM terminal 37.
• Continuity should exist.
• Check harness for a short to ground.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair or replace the circuit for an open or short to ground in harness or connectors.
9.CHECK THE MAF SENSOR
• Install all removed parts.
• Start engine.
• Check MAF sensor signal in data stream with the X-431.
TERMINAL
NO. ITEM CONDITION D ATA
(AVERAGE DC
VOLTAGE)
37 Air
flow
sensor •
Engine is
running
• ECT: 78°C
• Idle: 795
RPM
• IAT: 36°C
• IAT signal:
1.88 V Approximately
322 kg/h
Approximately 1.39 V
•If without the X-431, check voltage between MAF sensor terminal 5 and ground.
TERMINAL
NO. ITEM CONDITION D ATA
(AVERAGE DC
VOLTAGE)
37 Air
flow
sensor •
Engine is
running
• ECT: 78°C
• Idle: 795
RPM
• IAT: 36°C
• IAT signal:
1.88 V Approximately
1.39 V
DIAGNOSIS & TESTING
03
03–61Chery Automobile Co., Ltd.