ignition CHERY TIGGO 2009 Service Repair Manual

Downloaded from www.Manualslib.com manuals search engine 4.DETECT MALFUNCTIONING PART
• Check the following:
Harness connectors A-102, E-105
Front fuse and relay box H2, H5
Fuse 25, Fuse 12, Fuse 23, Fuse 24
• Check harness for open or short between O
2sensor and fuse.
• Repair or replace malfunctioning part.
• With the X-431, select view DTC.
Is DTC P0032 still present?
Ye s>>Go to the next step.
No
>>The system is now operating properly.
Reassemble the vehicle and road test to verify the customers complaint is repaired.
5.CHECK O2SENSOR HEATER CONTROL CIRCUIT FOR A SHORT
• Turn ignition switch off.
• Disconnect ECM connector.
• Check harness continuity between ECM terminal and O
2sensor terminal.
COMPONENT ECMUPSTREAM O2SENSOR
TERMINAL •
48 (With EOBD)
• 1 (Without EOBD) 1
• Continuity should exist.
• Check harness short to power supply circuit.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair circuit for a short to power in harness or connectors.
6.CHECK THE O2SENSOR HEATER
• Check resistance between O
2sensor heater terminals.
TERMINAL NO. RESISTANCE
1 & 2 (including
cable and connector) Approximately 9

DIAGNOSIS & TESTING
03–280Chery 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 (DC VOLTAGE)
17 Sensor (GND)•
Engine is running
• Warm-up condition:
78°C
• Idle: 795 RPM
• IAT: 36°C
• IAT signal: 1.88 V Approximately 0 V
33 Regulated sensor supply 5 V
37 Air flow sensor Approximately 322 kg/h
Approximately 1.39 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 running ECM detected that
the input signal is out of the
acceptable range. •
MAF sensor
• Intake air leaks
• Harness or
connectors
• 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 2.0L Engine) in Section 16 Wiring).
Are the ground connections OK?
Ye s>>Go to the next step.
No
>>Repair or replace ground harness or connections.
DIAGNOSIS & TESTING
03
03–283Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 2.CHECK INTAKE SYSTEM
• Check the following for proper connection.
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 MAF SENSOR ELECTRICAL CONNECTOR
• Disconnect the MAF sensor electrical connector (1).
• 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 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
VISMD030005
LTSMD030041
03–284Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 5.DETECT MALFUNCTIONING PART
• Check the following parts:
Relay
Fuse 23, fuse 24, fuse 12
Harness connectors A-102, E-105
• Check harness for an open or short between MAF sensor and fuse.
• Repair an open circuit or short to ground in harness or connectors.
• With the X-431, view DTC in ECM.
Is DTC P0102 present?
Ye s>>Go to the next step.
No
>>The system is now operating properly.
Reassemble the vehicle and road test to verify the customers complaint is repaired.
6.CHECK MAF SENSOR REFERENCE VOLTAGE
• 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 the circuit for an open or short to
ground in harness or connectors.
If circuit is normal, replace the ECM.
NOTE : The Immobilizer control module
must be matched to the new ECM
(See ECM Removal & Installation in Section 03 Electronic Engine Controls).
7.CHECK MAF SENSOR GROUND CIRCUIT FOR OPEN AND 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 open circuit or short to ground in harness or connectors.
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 or power.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair or replace circuit for an open or short to ground in harness or connectors.
DIAGNOSIS & TESTING
LTSMD030042
03
03–285Chery 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.ITEMCONDITION DATA
17 Sensor (GND)
Ignition switch on Approximately 0 V
33 Regulated sensor supply 1 5 V
37 Air flow sensor •
Engine is running
• Warm-up condition ECT:
78°C
• Idle: 795 RPM
• IAT: 36°C
• IAT signal: 1.88 V •
Approximately 322 kg/h
• Approximately 1.39 V
• Engine is running
• Warm-up condition ECT:
52°C
• Idle: 910 RPM
• IAT: 30°C
• IAT signal: 2.17 V •
Approximately 420 kg/h
• 1.52 V
On Board Diagnostic Logic
• Self-diagnosis detection logic.
DTC NO. DTC DEFINITION DTC DETECTION
CONDITION DTC SET
CONDITION POSSIBLE CAUSE
P0103 Mass or Volume Air
Flow (MAF) circuit high input Ignition switch on or
engine is running ECM detected that
the input signal is
out of the
acceptable range. •
MAF sensor
• Harness or
connectors
• 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.
DIAGNOSIS & TESTING
03
03–289Chery 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 2.0L Engine) in Section 16 Wiring).
Are the ground connections OK?
Ye s>>Go to the next step.
No
>>Repair or replace ground harness or connections.
2.CHECK INTAKE SYSTEM
• Check the following for connection:
Air cleaner
Intake air duct
Is the check result normal?
Ye s>>Go to the next step.
No
>>Clean or replace the components.
3.CHECK MAF SENSOR ELECTRICAL CONNECTOR
• Disconnect the MAF sensor electrical connector (1).
• 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.
DIAGNOSIS & TESTING
VISMD030005
03–290Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 4.CHECK MAF SENSOR POWER SUPPLY CIRCUIT
• Turn ignition switch on.
• 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 step 6.
No
>>Go to the next step.
5.DETECT MALFUNCTIONING PART
• Check harness for short to power between air flow sensor and ECM.
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.
6.CHECK MAF SENSOR GROUND CIRCUIT FOR 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 power.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair or replace circuit for short to power in harness or connectors.
7.CHECK MAF SENSOR OUTPUT SIGNAL CIRCUIT
• Check harness continuity between MAF sensor terminal 5 and ECM terminal 37.
• Continuity should exist.
• Check harness for short to power.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair or replace circuit for short to power in harness or connectors.
DIAGNOSIS & TESTING
LTSMD030042
03
03–291Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Check reference values between ECM terminals and ground under the following conditions:
ECM TERMINALNO. ITEM
CONDITION DATA (DC
VOLTAGE)
17 Sensor (GND) Ignition switch: ON 0 V
42 Intake Air
Temperature (IAT) sensor Ignition switch: ON IAT: 36°C
Approximately
1.88 V
On Board Diagnostic Logic
• Self-diagnosis detection logic.
DTC NO. DTC DEFINITION DTC DETECTION
CONDITION DTC SET
CONDITION POSSIBLE CAUSE
P0112 Intake Air
Temperature (IAT) circuit low input •
Ignition switch:
ON
• Engine: Running Output signal is
wrong or out of
acceptable range. •
IAT sensor
• Harness or
connectors
• Engine
temperature
• 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 2.0L Engine) in Section 16 Wiring).
Are the ground connections OK?
Ye s>>Go to the next step.
No
>>Repair or replace ground connections.
DIAGNOSIS & TESTING
03–294Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 2.CHECK IAT SENSOR ELECTRICAL CONNECTOR
• Disconnect the IAT sensor (IAT sensor is built-into)
electrical connector (1).
• 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 IAT SENSOR SIGNAL CIRCUIT
• Turn ignition switch on.
• Check reference voltage between IAT sensor termi-
nal 1 and ground in the IAT sensor electrical con-
nector E-009.
• 5 V should exist.
Is the check result normal?
Ye s>>Go to Step 5.
No
>>Go to the next step.
4.DETECT MALFUNCTIONING PART
• Turn ignition switch off.
• Disconnect ECM harness connector.
• Check harness for short to ground between IAT connector terminal 1 and ECM connector E-001, terminal 42.
Is the check result normal?
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
>>Repair or replace the circuit for short to ground in harness or connectors.
DIAGNOSIS & TESTING
VISMD030005
LTSMD030031
03
03–295Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 5.CHECK IAT SENSOR
• Connect IAT sensor connector.
• Connect ECM connector.
• Turn ignition switch on.
• Check signal between IAT sensor terminal 1 and ground under the following conditions:
TERMINAL NO. ITEM CONDITION DATA (DC
VOLTAGE)
42 IAT sensor Ignition switch on IAT: 36°C 1.88 V
Is the check result normal?
Ye s>>Go to the next step.
No
>>Replace IAT sensor.
6.CHECK DTC
• With the X-431 scan tool, read ECM DTCs.
• Refer to DTC Confirmation Procedure.
Is DTC P0112 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
03–296Chery Automobile Co., Ltd.