CHERY TIGGO 2009 Service Repair Manual

Downloaded from www.Manualslib.com manuals search engine 8.CHECK ECM POWER SUPPLY CIRCUIT - (3)
• Turn ignition switch on and then off.
• Check voltage between ECM terminals

12, 25 and ground.
• Voltage: Turn ignition switch on battery voltage will be exist and after turning ignition switch off, battery voltage
will exist a few seconds, then

drop to approximately 0 V.
Is the check result normal?
Ye s>>Check the starting system.
No
>>Go to the next step.
9.CHECK STARTER RELAY SUPPLY VOLTAGE
• Turn ignition switch off. Wait for at least 10 seconds.
• Check voltage between ECM terminal 34 and ground.
• Battery voltage should exist.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Go to step 11.
10.CHECK ECM POWER SUPPLY CIRCUIT - (4)
• Disconnect ECM harness connector.
• Disconnect front fuse and relay box harness connector F.
• Check harness continuity between ECM terminals 12, 25 and front fuse and relay box terminal F3.
• Continuity should exist.
• Also check harness for short to ground and short to power.
Is the check result normal?
Ye s>>Go to step 12.
No
>>Repair circuit for an open or short in harness or connectors.
11 .CHECK STARTER RELAY CIRCUIT
• Disconnect ECM harness connector.
• Disconnect front fuse and relay box harness connector A, G.
• Check harness continuity between ECM terminal 34 and front fuse and relay box terminal A1.
• Check harness continuity between front fuse and relay box terminal A1 and G5,
• Check harness continuity between front fuse and relay box terminal A13 and G5,
• Continuity should exist.
• Also check harness for short to ground and short to power.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair circuit for an open or short to ground or short to power in harness or connectors.
DIAGNOSIS & TESTING
03
03–467Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 12.CHECK FUSE
• Disconnect fuse 12 (30A), fuse 24 (5A), fuse 25 (10A), front fuse and relay box.
• Check fuse.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Replace fuse 12, 23, 24.
13.CHECK FRONT FUSE AND RELAY BOX
• Check front fuse and relay box.
• Check harness continuity between front fuse and relay box and battery.
Is the check result normal?
Ye s>>Replace the ECM.
No
>>Replace or repair front fuse and relay box or harness.
DIAGNOSIS & TESTING
03–468Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Diagnostic Trouble Code (DTC) Tests
11 - Oxygen Sensor
DIAGNOSIS & TESTING
LTSMW030016T
03
03–469Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine DIAGNOSIS & TESTING
LTSMW030017T
03–470Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine ECM TERMINAL NO.ITEMCONDITIONDATA (DC VOLTAGE)
52 Upstream oxygen sensor
heating •
Warm-up condition
• Idle 0-3V
• Engine is running
• Keep the engine speed
5000 RPM System voltage
59 Downstream oxygen
sensor •
Engine is running
• Warm-up condition
• Keep the engine speed
2000 RPM 0 - 0.8 V (recycle)
60 Upstream oxygen sensor •
Engine is running
• Warm-up condition
• Keep the engine speed
2000 RPM 0 - 0.8 V (recycle)
76 Sensor (GND)•
Warm-up condition
• Idle Approximately 0 V
On Board Diagnostic Logic
• Self-diagnosis detection logic.
DTC NO. DTC DEFINITION DTC DETECTION
CONDITION POSSIBLE CAUSE
11 Oxygen sensor Engine is running•
Fuel quality
• Oxygen 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 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 and select view DTC.
• 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 :
Before performing the following procedure, make sure that ECM ground connections are in good condition.
NOTE :
While performing electrical diagnosis & testing, always refer to the electrical schematics for specific circuit
and component information.
DIAGNOSIS & TESTING
03
03–471Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Diagnostic Procedure
1.CHECK GROUND CONNECTION.
• Turn ignition switch off.
• Loosen and retighten ground screws on the body (See Ground Inspection in Section 03 Electronic Engine Con-
trols).
• Inspect the ground connection B-201 (See Vehicle Wiring Harness Layout - Body Harness in Section 16 Wir-
ing).
• Inspect the ground connection E-208 (See Vehicle Wiring Harness Layout - Engine Control Harness (With MIT-
SUBISHI 2.4L Engine) in Section 16 Wiring).
Are the ground connections OK?
Ye s>>Go to the next step.
No
>>Repair or replace the ground connection.
2.CHECK UPSTREAM O2SENSOR ELECTRICAL CONNECTOR
• Disconnect the upstream O
2sensor (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.
3.CHECK DOWNSTREAM O2SENSOR ELECTRICAL CONNECTOR
• Disconnect the downstream O
2sensor (2) 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.
DIAGNOSIS & TESTING
LTSM030004
VISMD030204
03–472Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 4.CHECK THE O2SENSOR GROUND CIRCUIT FOR AN OPEN OR SHORT
• Disconnect ECM harness connector.
• Check harness continuity between upstream O
2sensor terminal 1 in connector E-074 and ECM terminal 76 in
connector E-054.
• Check harness continuity between downstream O
2sensor terminal 1 in connector B-011 and ground.
• Continuity should exist.
• Check harness for a short to power and short to ground.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair the circuits for an open or short to power or short to ground in harness or connectors.
5.CHECK THE O2SENSOR INPUT SIGNAL CIRCUIT FOR AN OPEN OR SHORT
• Check harness continuity between ECM terminal and O
2sensor terminal as follows.
• Continuity should exist.
• Check harness continuity between following terminals and ground.
• Continuity should not exist.
COMPONENT ECM TERMINALO2SENSOR TERMINAL
Upstream O
2sensor 60 4
Downstream O
2sensor 59 4
• Also Check harness short to power supply circuit.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair circuit for an open or short to power or short to ground in harness or connectors.
6.CHECK O2SENSOR POWER SUPPLY
• Turn ignition switch on.
• Check power supply between O
2sensor E-074, ter-
minal 2 and ground.
• Battery voltage should exist.
Is the check result normal?
Ye s>>Go to step 8.
No
>>Go to the next step.
DIAGNOSIS & TESTING
LTSMD030002
03
03–473Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 7.DETECT MALFUNCTIONING PART
• Check the following:
Fuse 25, Fuse 12, Fuse 24
Front fuse and relay box H5
Harness connectors A-102, E-105
Harness open or short between O
2sensor and fuse
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair or replace malfunctioning parts.
8.CHECK O2SENSOR HEATER CONTROL CIRCUIT FOR AN OPEN AND SHORT
• Turn ignition switch off.
• Check harness continuity between ECM terminal and O
2sensor terminal.
COMPONENTS ECMO2SENSOR
TERMINAL 523
• Continuity should exist.
• Check harness short to power supply circuit and ground.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair the circuit for an open or short to power supply circuit or ground in harness or connectors.
9.CHECK O2SENSOR HEATER
• Check resistance between O
2sensor terminals.
TERMINAL NO. RESISTANCE
2 & 3 (including cable and
connector) Approximately 9

1&2and1&3 (Continuity should notexist)
4&2and4&3
Is the check result normal?
Ye s>>Go to the next step.
No
>>Replace O2sensor.
DIAGNOSIS & TESTING
03–474Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 10. CHECK O2SENSOR
• Connect O
2sensor connector.
• 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 CHECK CONTENT NORMAL VALUE
Oxygen sensor •
Warm-up condition
• Become lean while
decelerate Decelerate from 4,000
RPM suddenly below 200 mV
• Warm-up condition
• Become rich while
accelerate Accelerate suddenly
600 - 1,000 mV
• Warm-up condition
• Check with O
2sensor
signal Idle
100 - 900 mV
2500 RPM 600 - 1,000 mV
Is the check result normal?
Ye s>>Go to the next step.
No
>>Replace O2sensor.
11 . CHECK DTC
• With the X-431 scan tool, read ECM DTCs.
• Refer to DTC Confirmation Procedure.
Is DTC 11 still present?
Ye s>>Replace the ECM.
No
>>The system is now operating properly.
Reassemble the vehicle and road test to verify the customers complaint is repaired.
DIAGNOSIS & TESTING
03
03–475Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 12 - Air Flow Sensor
DIAGNOSIS & TESTING
LTSMW030013T
03–476Chery Automobile Co., Ltd.