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.ITEMTEST METHOD DATA (DC VOLTAGE)
62 Knock sensor•
Test Method 1: Knock at
cylinder with rubber
hammer
• Test Method 2: Knock at
sensor slightly Output signal voltage
should exist.
On Board Diagnostic Logic
• Self-diagnosis detection logic.
DTC NO. DTC DEFINITION DTC DETECTION
CONDITION POSSIBLE CAUSE
31 Knock sensorAn excessive voltage from
the sensor is sent to ECM. •
Knock 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.
• Run engine for a while then 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 the ECM ground connection is in good condition.
NOTE :
While performing electrical diagnosis & testing, always refer to the electrical schematics for specific circuit
and component information.
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 E-208 (See Vehicle Wiring Harness Layout - Engine Room Harness (With Mit-
subishi 2.4L Engine) in Section 16 Wiring).
Is the ground connections OK?
Ye s>>Go to the next step.
No
>>Repair or replace ground connection.
DIAGNOSIS & TESTING
03–516Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 2.CHECK KNOCK SENSOR ELECTRICAL CONNECTOR
• Disconnect the knock sensor electrical connector
E-066 (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 THE KNOCK SENSOR GROUND CIRCUIT
• Check continuity between knock sensor terminal 1 and ground.
• Continuity should exist.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair or replace the knock sensor ground circuit.
4.CHECK KNOCK SENSOR SIGNAL CIRCUIT
• Disconnect ECM harness connector.
• Check harness continuity between sensor connector E-066, terminal 1 and ground, sensor terminal 2 and ECM
terminal 62.
CHECK SENSOR CIRCUIT
ECM TERMINAL KNOCK SENSOR TERMINAL
62 2
• Also check harness for short to power and short to ground.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair circuit for an open or short in harness or connectors.
DIAGNOSIS & TESTING
LTSM030011
03
03–517Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 5.CHECK KNOCK SENSOR SIGNAL
• Connect knock sensor (1) connector.
• Set multimeter to voltage range.
• Check knock sensor (1) output signal as table
shown.
CHECK OUTPUT SIGNAL
KNOCK SENSOR TERMINAL NO. TEST METHODDATA (AVERAGE DC VOLTAGE)
1&2 •
Test Method 1: Knock at cylinder
with rubber hammer. Output signal voltage should exist.
• Test Method 2: Knock at sensor
slightly.
• Output signal voltage should exist.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Replace knock sensor.
6.CHECK DTC
• With the X-431 scan tool, read ECM DTCs.
• Refer to DTC Confirmation Procedure.
Is DTC 31 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
LTSM030011
03–518Chery 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)
1 Injector 1
•Engine is running
• Warm-up condition
• Accelerate suddenly Voltage: 11 - 14 V
2
Injector 3
14 Injector 2
15 Injector 4
On Board Diagnostic Logic
• Self-diagnosis detection logic.
DTC NO. DTC DEFINITION DTC DETECTION
CONDITION POSSIBLE CAUSE
41 InjectorEngine is running •
Injector
• 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.
• 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 the ECM ground connection is in good condition.
NOTE :
While performing electrical diagnosis & testing, always refer to the electrical schematics for specific circuit
and component information.
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 E-208 (See Vehicle Wiring Harness Layout - Engine Room Harness (With Mit-
subishi 2.4L Engine) in Section 16 Wiring).
Is the ground connections OK?
Ye s>>Go to the next step.
No
>>Repair or replace ground connection.
DIAGNOSIS & TESTING
03–520Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 2.INSPECTION START
• Start engine.
Is any cylinder ignited?
Ye s>>If with the X-431, go to the next step.
If without the X-431, go to step 4.
No
>>Go to step 5.
3.PERFORM ACTIVE TEST FUNCTION
• Select ACTIVE TEST menu.
• Perform injector active test.
• Make sure that each test produces a momentary engine speed drop.
Is the check result normal?
Ye s>>The system is OK.
No
>>Go to step 5.
4.CHECK FUNCTION OF INJECTOR
• Listen to injector operating sound one by one.
Do all injectors clicking noise exist?
Ye s>>Go to step 10.
No
>>Go to the next step.
5.CHECK INJECTOR ELECTRICAL CONNECTOR
• Turn ignition switch off.
• Disconnect the injector 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
LTSM020173
03
03–521Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 6.CHECK INJECTOR POWER SUPPLY CIRCUIT FOR OPEN OR SHORT
• Turn ignition switch on.
• Check injector supply voltage between sensor ter-
minal 1 and ground in the electrical connector.
• Battery voltage should exist.
Is the check result normal?
Ye s>>Go to step 8.
No
>>Go to the next step.
7.DETECT MALFUNCTIONING PART
• Disconnect injector harness connector.
• Check the following:
Harness connectors A-102, E-105
Front fuse and relay box H3
Fuse 22, Fuse 12
Harness for open or short between injector and fuse
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair or replace malfunctioning part.
8.CHECK INJECTOR CONTROL CIRCUITS FOR AN OPEN AND SHORT
• Turn ignition switch off.
• Disconnect ECM harness connector.
• Check harness continuity between following terminals.
INJECTOR
NO. ECM
TERMINAL INJECTOR
TERMINAL
112
21 42
322
41 52
DIAGNOSIS & TESTING
LTSMD030019
03–522Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine •Continuity should exist.
• Also check harness for short to power or short to ground.
Is the check result normal?
Ye s>>Go to step 10.
No
>>Go to the next step.
9.DETECT MALFUNCTIONING PART
• Check harness for an open or short between injector control circuit and ground.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair harness or connectors.
10. CHECK INJECTOR
• Check resistance as table shown.
INJECTOR NO. INJECTOR TERMINALRESISTANCE (APPROXIMATELY)
(20°C)
1 1&2
13-16
2
1&2
3 1&2
4 1&2
• Also check signal output.
• Connect ECM connector.
• Connect injector connector.
TERMINAL NO. ITEMCONDITIONDATA (DC VOLTAGE)
1 Injector 1
•Engine is running
• Warm-up condition
• Accelerate suddenly Voltage: 11 - 14 V
2
Injector 3
14 Injector 2
15 Injector 4
DIAGNOSIS & TESTING
03
03–523Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine •With the X-431, select data stream:
Injector (condition 1) - Idle switch is close while TPS signal output is high 50 - 100 mV than signal output
in idle position.
Injector (condition 2) - This inject control time under two condition: crank speed below 250 RPM, power supply is 11 voltage.
CHECK ITEM CHECK CONTENT NORMAL VALUE: MS
Injector (condition 1) •
Engine condition:
Running ECT: 0°C
13 - 20
ECT: 20°C 27 - 41
ECT: 80°C 6.8 - 10.2
Injector (condition 2) •
ECT: 80 - 95°C
• Lamp and all
accessories: OFF
• Transaxle: Neutral Engine condition: Idle
1.9 - 3.1
2500 RPM 1.7 - 2.9
Engine high running idle suddenly Raise
Is the check result normal?
Ye s>>Go to the next step.
No
>>Replace injector.
11 .CHECK DTC
• With the X-431 scan tool, read ECM DTCs.
• Refer to DTC Confirmation Procedure.
Is DTC 41 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
03–524Chery Automobile Co., Ltd.