Chery Tiggo. Manual — part 243
4.
CHECK TFT SENSOR
• Check TFT sensor as follows:
TFT SENSOR RESISTANCE
TEMPERATURE °C
RESISTANCE
⍀
-50
93917
-30
28237.4
-10
9826
0
6079
20
2528.5
25
2063
40
1159.2
50
810.4
70
419.1
80
309.2
100
176.2
120
105.9
140
66.7
Is the check result normal?
Yes
>>
Go to the next step.
No
>>
Replace the TFT sensor.
5.
CHECK A/T FLUID PRESSURE SENSOR
• Turn ignition switch on.
• With X-431 scan tool, select view TCM data stream and compare to the following table.
ITEM
CONDITION
DISPLAY
VALUE
Fluid Pressure
• Ignition switch:
ON
• Engine: Not
running
Below 0.2 bar
• Engine: Idle
• TFT: 31°C
• ECT: 30°C
Approximately
0.05 bar
Is the check result normal?
Yes
>>
Go to the next step.
No
>>
Replace the TCM.
DIAGNOSIS & TESTING
6.
CHECK DTC
• With the X-431 scan tool, read TCM DTCs.
• Refer to ⬙DTC Confirmation Procedure⬙.
Is the check result normal?
Yes
>>
The system is now operating properly.
Reassemble the vehicle and road test to verify the customers complaint is repaired.
No
>>
Replace the TCM.
DIAGNOSIS & TESTING
08
P0657 - Solenoid Power Supply Circuit Shorted To Voltage
Electronic Valve Solenoid
DIAGNOSIS & TESTING
LTSMW080022T
On Board Diagnostic Logic
• Self-diagnosis detection logic.
DTC NO.
DTC DEFINITION
DTC DETECTION
CONDITION
DTC SET
CONDITION
POSSIBLE CAUSE
P0657
Solenoid power
supply circuit
shorted to voltage
Vehicle is driving
The Transaxle
Control Module
(TCM) will set this
DTC when the TCM
detects an improper
voltage drop (short
to voltage) when it
tries to operate the
solenoid valve.
• 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, view and erase stored DTCs in the TCM.
• 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).
NOTE :
Using the appropriate diagnostic test tool, you can diagnose the TCM harness while the TCM is still connected. This
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
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