Chery Tiggo. Manual — part 261
8.
CHECK EVLU VALVE
• With the scan tool X-431, drive the vehicle, monitor the EVLU valve condition.
• Drive the vehicle until it is fully warmed up to at least 50°C. Perform the following step 3 times:
• Drive the vehicle at 80 km/h (50 mph) and allow 4th gear to engage for at least 10 seconds.
• Close the throttle, then tip back in until the throttle angle is between 20 and 30 degrees.
NOTE :
If you go over 30 degrees, you must release the throttle and retry.
Does the TCC engage during any of the attempts?
Yes
>>
The system is normal.
Reassemble the vehicle and road test to verify the customers complaint is repaired.
No
>>
Replace the torque converter lock solenoid valve for a mechanical problem.
9.
CHECK DTC
• With the X-431 scan tool, read TCM DTCs.
• Refer to ⬙DTC Confirmation Procedure⬙.
Is DTC P0795 still present?
Yes
>>
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
P0840 - Pressure Sensor
DIAGNOSIS & TESTING
LTSMW080015T
08
On Board Diagnostic Logic
• Self-diagnosis detection logic.
DTC NO.
DTC DEFINITION
DTC DETECTION
CONDITION
DTC SET
CONDITION
POSSIBLE CAUSES
P0840
Pressure sensor
Vehicle is driving
The Transaxle
Control Module
(TCM) detects this
DTC after the
engine speed is up
to 2000 RPM for 10
seconds and there
is a fault with the
pressure sensor
circuit.
• A/T fluid pressure
sensor
• 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 Data Link Connector (DLC) - use the most current software available.
• Turn ignition switch on, with the scan tool, view and erase stored DTCs in the TCM.
• Start the engine and warm it to normal operating temperature.
• Drive the vehicle uphill to maintain the driving conditions required for this test.
• 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).
NOTE :
While performing electrical diagnosis & testing, always refer to the electrical schematics for specific circuit
and component information.
DIAGNOSIS & TESTING
Diagnostic Procedure
1.
CHECK A/T FLUID PRESSURE SENSOR SIGNAL
• With the scan tool, select view DTC and data stream for A/T.
• Start vehicle and monitor the value of ⬙INPUT SPEED SENSOR⬙.
ITEM
CONDITION
DISPLAY
VALUE
Fluid Pressure
Ignition switch
on, not running
Below 0.2 bar
• Engine: Idle
• TFT: 31°C
• ECT: 30°C
Approximately
0.05 bar
Is the check result normal?
Yes
>>
The condition that caused this DTC is intermittent (See Diagnostic Help in Section 08 Transaxle &
Transfer Case).
No
>>
Go to the next step.
2.
CHECK FLUID PRESSURE SENSOR ELECTRICAL CONNECTOR
• Stop vehicle and turn ignition switch off.
• Disconnect fluid pressure sensor 2 connector.
• Inspect the electrical connector for damage.
Is the electrical connector OK?
Yes
>>
Go to the next step.
No
>>
Repair or replace the electrical connector
as necessary.
DIAGNOSIS & TESTING
LTSMD080021
08
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