CHERY TIGGO 2009 Service Repair Manual

Downloaded from www.Manualslib.com manuals search engine 14 - Throttle Position Sensor
DIAGNOSIS & TESTING
LTSMW030014T
03
03–487Chery 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)
65 Regulated sensor
supply
Ignition switch: ON -
Approximately 5 V
68 Throttle Position
(TP) sensor TP is in idle position 0.3 - 1.0 V
TP is full opening 4.5 - 5.5 V
71 Idle position switch Adjust TP to idle
position 0-1V
TP is ajar Above 4 V
76 Sensor (GND) -Approximately 0 V
On Board Diagnostic Logic
• Self-diagnosis detection logic.
DTC NO. DTC DEFINITION DTC DETECTION
CONDITION DTC SET
CONDITION POSSIBLE CAUSE
14 Throttle position
sensor Ignition switch on for
60 seconds or after
engine start •
Idle position
switch is in ON
position and output
is over 2 V for 4
seconds
continuously.
• Signal output is
below 0.2 V for 4
seconds
continuously. •
Throttle Position
Sensor (TPS) or
misalignment
• Harness or
connectors
• Idle position switch
ON position is not
normal
• Idle position switch
signal circuit 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 :
Before performing the following procedure, make sure that the ECM connection is in good condition.
NOTE :
While performing electrical diagnosis & testing, always refer to the electrical schematics for specific circuit
and component information.
DIAGNOSIS & TESTING
03–488Chery 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 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.
2.CHECK THROTTLE POSITION SENSOR (TPS) ELECTRICAL CONNECTOR
• Turn ignition switch off.
• Disconnect the TPS (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.
DIAGNOSIS & TESTING
LTSM030027
03
03–489Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 3.CHECK THE THROTTLE POSITION SENSOR (TPS) POWER SUPPLY CIRCUIT
• Turn ignition switch on.
• Check supply voltage between TPS terminal 1 and
ground in the TPS electrical connector E-076.
• 4.5 - 5.5 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
power supply or ground in harness or con-
nectors.
If the circuit is normal, go to the next
step.
4.CHECK THE TPS SIGNAL CIRCUIT FOR AN OPEN OR SHORT
• Turn ignition switch off.
• Disconnect ECM harness connector.
• Check harness continuity between following terminals.
TPS TERMINAL ECM TERMINAL
26 8
• Continuity should exist.
• 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 the circuit for an open or short to power or short to ground in harness or connectors.
5.CHECK TPS IDLE SWITCH CIRCUIT FOR AN OPEN OR SHORT
• Check harness continuity between following terminals.
TPS TERMINAL ECM TERMINAL
37 1
• Continuity should exist.
• Check harness for short to power or short to ground.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair the circuit for an open or short to power or short to ground in harness or connectors.
DIAGNOSIS & TESTING
LTSMD030010
03–490Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 6.CHECK TPS GROUND CIRCUIT FOR AN OPEN OR SHORT
• Check harness continuity between following terminals.
TPS TERMINAL ECM TERMINAL
47 6
• Continuity should exist.
• Check harness for short to power.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair the circuit for an open or short to power in harness or connectors.
7.CHECK THE TPS RESISTANCE
• Check the resistance between TPS terminal 1 and terminal 3.
• 28-33 (20°C) should exist.
• Also check the resistance between TPS terminal 2 and terminal 4 while turn the throttle.
• The resistance should linear change.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Replace the TPS.
DIAGNOSIS & TESTING
03
03–491Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 8.CHECK THE TPS SIGNAL
• Turn ignition switch off.
• Connect ECM connector.
• Connect TPS connector.
• Turn ignition switch on.
• Check voltage between TPS terminal 2 and terminal 3 and ground under the following conditions:
TERMINAL NO. ITEM CONDITION DATA (DC
VOLTAGE)
65 Regulated sensor
supply
Ignition switch: ON -
Approximately 5 V
68 Throttle Position
(TP) sensor TP is in idle position 0.3 - 1.0 V
TP is fully opened 4.5 - 5.5 V
TP is open step by
step Value is directly
proportional to TP
opening angle
71 Idle position switch Adjust TP to idle
position 0-1V
TP is ajar Above 4 V
76 Sensor (GND) -Approximately 0 V
Is the check result normal?
Ye s>>Go to the next step.
No
>>Replace the TPS.
9.CHECK DTC
• With the X-431 scan tool, read ECM DTCs.
• Refer to DTC Confirmation Procedure.
Is DTC 14 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
03–492Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 21 - Coolant Temperature Sensor
DIAGNOSIS & TESTING
LTSMW030005T
03
03–493Chery 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)
67 Engine Coolant
Temperature (ECT) sensor Ignition switch: ON ECT: 0°C
3.2 - 3.8 V
ECT: 20°C 2.3 - 2.9 V
ECT: 40°C 1.3 - 1.9 V
ECT: 80°C 0.3 - 0.9 V
76 Sensor (GND) -Approximately 0 V
On Board Diagnostic Logic
• Self-diagnosis detection logic.
DTC NO. DTC DEFINITION DTC DETECTION
CONDITION DTC SET
CONDITION POSSIBLE CAUSE
21 Coolant temperature
sensor •
Ignition switch:
ON position for 60
seconds
• Engine: Running •
Signal output is
above 4.6 V for 4
seconds
continuously
(amount to -45°C
engine coolant
temperature).
• Signal output is
below 0.1 V for 4
seconds
continuously
(amount to 145°C
engine coolant
temperature). •
Engine Coolant
Temperature (ECT)
sensor
• Harness or
connectors
• ECM
• Ignition switch:
ON
• Engine speed is
above 500 RPM •
Signal output raise
from below 1.6 V to
above 1.6 V
(amount to 40°C
engine coolant
temperature).
• Signal output is
above 1.6 V for 5
minutes.
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 :
Before performing the following procedure, make sure that the ECM connection is in good condition.
NOTE :
While performing electrical diagnosis & testing, always refer to the electrical schematics for specific circuit
and component information.
DIAGNOSIS & TESTING
03–494Chery 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 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.
2.CHECK ENGINE COOLANT TEMPERATURE (ECT) SENSOR ELECTRICAL CONNECTOR
• Disconnect the ECT (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.
DIAGNOSIS & TESTING
LTSM030007
03
03–495Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 3.CHECK ENGINE COOLANT TEMPERATURE (ECT) SENSOR SIGNAL CIRCUIT FOR AN OPEN OR SHORT
• Turn ignition switch on.
• Check reference voltage between sensor terminal 2
and ground in the sensor electrical connector
E-068.
• 4.5 - 4.9 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 connector.
• Check harness for an open or short between ECT connector terminal 2 and ECM connector E-054, terminal 67.
Is the check result normal?
Ye s>>Replace the ECM.
No
>>Repair circuit for an open or short in harness or connectors.
5.CHECK ECT SENSOR GROUND CIRCUIT FOR AN OPEN AND SHORT
• Check harness continuity between following terminals.
ECT SENSOR TERMINAL ECM TERMINAL
17 6
• Continuity should exist.
• 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 to power or short to ground in harness or connectors.
DIAGNOSIS & TESTING
LTSMD030008
03–496Chery Automobile Co., Ltd.