CHERY TIGGO 2009 Service Repair Manual

Downloaded from www.Manualslib.com manuals search engine On Board Diagnostic Logic
•Self-diagnosis detection logic.
DTC NO. DTC
DEFINITION DTC
DETECTION CONDITION DTC SET CONDITION
POSSIBLE
CAUSES
P0775 Modulation
solenoid valve
(EVM) short to power supply Vehicle is driving The EVM is modulated by
controlling the duty cycle of the
Solenoid. The DTC is set after the
TCM detects that the duty cycle of
the control current is out of the
acceptable range for specified
seconds. •
Modulation
solenoid valve
(EVM)
• Harness or
connectors (The
sensor circuit is
open or shorted)
• Transaxle
Control Module
(TCM)
P0775 Modulation
solenoid valve (EVM) open
circuit or short to ground Vehicle is driving The EVM is modulated by
controlling the duty cycle of the
Solenoid. The DTC is set after the
TCM detects that the duty cycle of
the control current is out of the
acceptable range for specified
seconds. •
Modulation
solenoid valve
(EVM)
• Harness or
connectors (The
sensor circuit is
open or shorted)
• Transaxle
Control Module
(TCM)
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 TCM.
• Start engine and warm it to normal operating temperature.
• With the scan tool, 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 08 Transaxle & Transfer Case for more information).
• If using the appropriate diagnostic test tool, you can diagnose the TCM harness while the TCM is still con-
nected.
• Using the appropriate diagnostic test tool in this way will help prevent electrical connector terminal damage.
NOTE :
While performing electrical diagnosis & testing, always refer to the electrical schematics for specific circuit
and component information.
DIAGNOSIS & TESTING
08–88Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Diagnostic Procedure
1.CHECK A/T SOLENOID SIGNAL
• With the scan tool, select view DTC and data stream for A/T.
• Start the engine.
• Monitor the value of the gear position as indicated in the following table while driving:
SEQUENCE SOLENOID (EVS) CONDITION
LEVER
POSITION EVS
EVS1 EVS2 EVS3 EVS4 EVS5 EVS6
R Not
active Not
active Not
active Not
active Not
active Not
active
N/P Not
active Not
active Active Not
active Not
active Not
active
1 Not
active Not
active Active Active Not
active Not
active
2 Not
active Active Not
active Active Not
active Not
active
3 Not
active Not
active Not
active Not
active Not
active Not
active
4 Active Active Not
active Not
active Not
active Not
active
Is the check result normal and DTC not present?
Ye s>>The condition that caused this DTC is intermittent (See Diagnostic Help in Section 08 Transaxle &
Transfer Case).
No
>>Go to the next step.
2.ACTUATE TEST
• With X-431, perform the solenoid actuate test.
• The solenoid should be heard.
Is the check result normal?
Ye s>>Go to step 7.
No
>>Go to the next step.
DIAGNOSIS & TESTING
08
08–89Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 3.CHECK EVM SOLENOID VALVE RESISTANCE
• Turn ignition switch off.
• Disconnect pressure adjust solenoid valve (7) connector.
• Check EVM solenoid valve resistance as shown in the following table:
EVM SOLENOID (7) RESISTANCE BASED ON
TRANSAXLE TEMPERATURE
TEMPERATURE RESISTANCE
23°C 36 - 44
Is the check result normal?
Ye s>>Replace the valve with a known good one.
With X-431, perform the solenoid actuate test.
If the solenoid can be heard, Go to step 7.
If the solenoid can’t be heard, Go to the next step.
No
>>Replace the damaged solenoid valve.
4.CHECK EVM SOLENOID VALVE POWER SUPPLY
• Turn ignition switch on.
• Check power supply between EVM control solenoid
valve E-037 terminal B12 and ground in the A/T
assembly connector E-037.
• 12 V should exist.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair or replace the open circuit or short
to ground in harness or connectors.
DIAGNOSIS & TESTING
LTSMD080029
LTSMD080062
08–90Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 5.CHECK EVM SOLENOID VALVE CONTROL CIRCUIT
• Turn ignition switch off.
• Disconnect TCM connector.
• Turn ignition switch on.
• Check if voltage is present between E-037, terminal B8 and ground.
• Check the harness for short to power supply circuits.
Is the check results normal?
Ye s>>Go to the next step.
No
>>Repair or replace the open circuit or short to ground or short to power supply in harness or connec-
tors.
6.CHECK EVM SIGNAL
• Connect TCM and EVM connector.
• With the engine running, move the shifter to Nposition, check the voltage of the EVM valve between the
TCM pin 26 and pin 19.
Is the voltage approximately 2.5 V with the engine running and the transaxle in the Nposition?
Ye s>>Go to the next step.
No
>>Go to step 8.
7.CHECK FLUID PRESSURE
• Connect the ATF pressure gauge.
• Drive the vehicle and monitor the transaxle main ATF distributing passage pressure.
GROUND TIME (%) MODULATION FLUID
PRESSURE
(×100000 PA)
00
10 0.32
12 0.48
15 0.67
20 0.88
30 1.17
40 1.41
50 1.69
60 1.97
70 2.26
80 2.60
88 2.87
90 2.91
92 2.95
95 3
100 3
DIAGNOSIS & TESTING
08
08–91Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine •Verify if the EVM valve duty cycle and ATF pres-
sure ratio matches.
Does the EVM valve duty cycle and ATF pressure
ratio match?
Ye s>>Go to the next step.
No
>>Replace the EVM valve for a mechanical
problem or repair the transaxle internal main ATF dis-
tributing passage pressure control device.
8.CHECK DTC
• With the X-431 scan tool, read TCM DTCs.
• Refer to DTC Confirmation Procedure.
Is DTC P0775 present?
Ye s>>Replace the TCM.
No
>>The system is now operating properly.
Reassemble the vehicle and road test to verify the customers complaint is repaired.
DIAGNOSIS & TESTING
LTSMD080057
08–92Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine P0795 - Torque Converter Lock Solenoid Valve (EVLU) Open Circuit Or Short To
Ground
P0795 - Torque Converter Lock Solenoid Valve (EVLU) Short To Voltage
DIAGNOSIS & TESTING
LTSMW080021T
08
08–93Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine On Board Diagnostic Logic
•Self-diagnosis detection logic.
DTC NO. DTC
DEFINITION DTC
DETECTION CONDITION DTC SET CONDITION
POSSIBLE
CAUSES
P0795 Torque converter
lock solenoid
valve (EVLU)
open circuit or
short to ground Vehicle is driving The Transaxle Control Module
(TCM) detects that the torque
converter lock solenoid valve
(EVLU) circuit shorted to ground or
open. •
Torque
converter lock
solenoid valve
(EVLU)
• Harness or
connectors (The
sensor circuit is
open or shorted)
• Transaxle
Control Module
(TCM)
P0795 Torque converter
lock solenoid
valve (EVLU)
short to voltage Vehicle is driving The Transaxle Control Module
(TCM) detects that the torque
converter lock solenoid valve
(EVLU) circuit is shorted to voltage. •
Torque
converter lock
solenoid valve
(EVLU)
• Harness or
connectors (The
sensor circuit is
open or shorted)
• Transaxle
Control Module
(TCM)
DTC Confirmation Procedure:
Before performing the following procedure, confirm that battery voltage is more than 12 V.
• Connect the X-431 scan tool to the diagnostic connector, press the POWER key to start the X-431.
• Start the engine and warm it to normal operating temperature.
• With the scan tool, 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 08 Transaxle & Transfer Case for more information).
• If using the appropriate diagnostic test tool, you can diagnose the TCM harness while the TCM is still con-
nected.
• Using the appropriate diagnostic test tool in this way will help prevent electrical connector terminal damage.
NOTE :
While performing electrical diagnosis & testing, always refer to the electrical schematics for specific circuit
and component information.
DIAGNOSIS & TESTING
08–94Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Diagnostic Procedure
1.CHECK A/T SOLENOID SIGNAL
• With the scan tool, select view DTC and data stream for A/T.
• Start the engine.
• Monitor the value of the gear position as indicated in the following table while driving:
SEQUENCE SOLENOID (EVS) CONDITION
LEVER
POSITION EVS
EVS1 EVS2 EVS3 EVS4 EVS5 EVS6
R Not
active Not
active Not
active Not
active Not
active Not
active
N/P Not
active Not
active Active Not
active Not
active Not
active
1 Not
active Not
active Active Active Not
active Not
active
2 Not
active Active Not
active Active Not
active Not
active
3 Not
active Not
active Not
active Not
active Not
active Not
active
4 Active Active Not
active Not
active Not
active Not
active
Is the check result normal and DTC not present?
Ye s>>The condition that caused this DTC is intermittent (See Diagnostic Help in Section 08 Transaxle &
Transfer Case).
No
>>Go to the next step.
2.ACTUATE TEST
• With X-431, perform the solenoid actuate test.
• The solenoid should be heard.
Is the check result normal?
Ye s>>Go to step 7.
No
>>Go to the next step.
DIAGNOSIS & TESTING
08
08–95Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 3.CHECK TORQUE CONVERTER LOCK SOLENOID VALVE RESISTANCE
• Turn the ignition switch off.
• Disconnect torque converter lock solenoid valve 8 connector E-037.
• Check solenoid valve resistance as shown in the following table:
TORQUE CONVERTER LOCK SOLENOID
(8) RESISTANCE BASED ON TRANSAXLE TEMPERATURE
Temperature Resistance
23°C 38 - 42
Is the check result normal?
Ye s>>Replace the valve with a known good one.
With X-431, perform the solenoid actuate test.
If the solenoid can be heard, go to step 7.
If the solenoid can’t be heard, go to the next step.
No
>>Replace the damaged solenoid valve.
4.CHECK TORQUE CONVERTER LOCK SOLENOID VALVE POWER SUPPLY
• Turn the ignition switch on.
• Check power supply between torque converter lock
solenoid valve E-037 terminal B6 and ground in the
A/T assembly connector E-037.
• 12 V should exist.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair or replace the open circuit or short
to ground in harness or connectors.
DIAGNOSIS & TESTING
LTSMD080029
LTSMD080064
08–96Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 5.CHECK TORQUE CONVERTER LOCK SOLENOID VALVE CONTROL CIRCUIT
• Turn ignition switch off.
• Disconnect TCM connector.
• Check for harness continuity between the following terminals:
Check Resistance
TORQUE
CONVERTER LOCK
SOLENOID VA LV E
TERMINAL TCM
CONNECTOR E-036
TERMINAL CONTINUITY
B9
20Yes
• Check the harness for short to ground.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair or replace the open circuit or short to ground in harness or connectors.
6.CHECK TORQUE CONVERTER LOCK SOLENOID VALVE CONTROL CIRCUIT
• Turn the ignition switch on.
• Check if voltage is present between E-037, terminal
B9 and ground.
• Check the harness for short to power supply cir-
cuits.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair or replace the circuit for a short to
power supply in harness or connectors.
7.CHECK TORQUE CONVERTER LOCK SOLENOID VALVE SIGNAL
• Connect TCM and torque converter lock solenoid valve connector.
• With the engine running, move the shifter to Nposition, check the voltage of the solenoid valve between the
TCM pin 19 and pin 20.
Is the voltage approximately 4.5 V with the engine running and the transaxle in the Nposition?
Ye s>>Go to the next step.
No
>>Go to step 9.
DIAGNOSIS & TESTING
LTSMD080066
08
08–97Chery Automobile Co., Ltd.