Chery Tiggo. Manual — part 289
MEASURE STATUS
STANDARD FLUID PRESSURE KPA (PSI)
GEAR
LEVER
POSITION
GEAR
POSITION
ENGINE
SPEED
(RPM)
DECELERATION
CLUTCH
PRESSURE
REVERSE
GEAR
CLUTCH
PRESSURE
OVERDRIVE
CLUTCH
PRESSURE
LOW/
REVERSE
GEAR
CLUTCH
PRESSURE
SECONDARY
BRAKE
PRESSURE
TORQUE
CONVERTER
PRESSURE
D
Gear 1
2,500
1,010 - 1,050
(146 - 152)
-
-
1,010 -
1,050 (146 -
152)
-
500 - 700
(73 - 101)
Gear 2
2,500
-
-
-
-
1,010 - 1,050
(146 - 152)
500 - 700
(73 - 101)
Gear 3
2,500
590 - 690 (85 -
100)
-
590 - 690
(85 - 100)
-
-
450 - 650
(65 - 94)
Gear 4
2,500
-
-
590 - 690
(85 - 100)
-
590 - 690 (85
- 100)
450 - 650
(65 - 94)
• In accordance with the shown status of standard fluid pressure measurement table, measure the fluid pressure
of each measurement port. The measurement of each port should be within the standard range.
• If some measurement values is beyond the standard range, please refer to the fluid pressure measurement and
diagnosis table for causes.
Is the check result normal?
Yes
>>
Go to step 5 for disc or plate abrasion.
No
>>
Go to the next step.
3.
CHECK VALVE BODY ASSEMBLY AND FLUID PUMP AND PIPELINE
• Turn the ignition switch off.
• Disassemble and repair F4A4 automatic transaxle assembly (See Automatic Transaxle Removal & Installation in
Section 08 Transaxle & Transfer Case).
• Check valve body and fluid pump and pipeline.
Is the check result normal?
Yes
>>
Go to the next step.
No
>>
Replace damaged components and low speed clutch and reverse/low brake clutch for low pressure
burned.
4.
COMPRESSED AIR TEST
• Check low speed clutch system: Low speed clutch piston should be active and maintain pressure when com-
pressed air is applied to the fluid hole.
• Check reverse/low brake clutch system: Reverse/low brake clutch piston should be active and maintain pressure
when compressed air is applied to the fluid hole.
Is the check result normal?
Yes
>>
Go to the next step for disc or plate abrasion.
No
>>
Replace damaged components and low speed clutch and reverse/low brake clutch for low pressure
burned.
DIAGNOSIS & TESTING
5.
CHECK LOW SPEED CLUTCH SYSTEM
• Check low speed clutch system:
− Check low speed clutch plate
− Check low speed clutch disc
− Snap ring
− Clutch reaction disc
− D-Ring
− Spring retainer
− Low speed clutch piston
− Low speed clutch drum
Is the check result normal?
Yes
>>
Go to the next step.
No
>>
Replace the damaged components.
6.
CHECK REVERSE/LOW BRAKE SYSTEM
• Check reverse/low brake system:
− Check reverse/low brake plate
− Check reverse/low brake disc
− Central support
− Snap ring
− Clutch reaction disc
− Spring retainer
− Reverse/low brake piston
Is the check result normal?
Yes
>>
Go to the next step.
No
>>
Replace the damaged components.
7.
CHECK DTC
• Assemble all disassembled components.
• Install the transaxle assembly (See Automatic Transaxle Removal & Installation in Section 08 Transaxle &
Transfer Case).
• Fill the transaxle with new ATF:
− Fill the ATF from the fill tube.
− Reinstall the hose connector disassembled in step 1 and reinstall the dipstick (clean the dipstick before
installing).
− Shift the gear selector lever to each gear position and then shift to gear “N”.
− Drive the vehicle until the ATF reaches operating temperature (70° - 80°C) and re-check the fluid level. The
fluid level must be within the HOT range of dipstick.
− Reinstall the dipstick into the transaxle.
− With the X-431 scan tool, read TCM DTCs.
− Refer to
⬙DTC Confirmation Procedure⬙.
Is DTC 41 still present?
Yes
>>
Replace the TCM.
No
>>
The system is now operating properly.
DIAGNOSIS & TESTING
08
42 - Second Gear, Ratio Out Of Limits
DIAGNOSIS & TESTING
LTSMW080005T
Operating Components Condition
• Related Operating Components
RELATED OPERATING COMPONENT
GEARSHIFT
LEVER
POSITION
GEAR
RATIO
ENGINE
START
PARKING
MECHANISM
DRIVE
LOCK
LOW
SPEED
CLUTCH
(UD)
REVERSE
GEAR
CLUTCH
(REV)
OVERSPEED
CLUTCH
(OD)
LOW
GEAR/
REVERSE
GEAR
BRAKE
(L/R)
GEAR
2ND
BRAKE
(2ND)
ONE-
WAY
CLUTCH
(OWC)
P
Parking
-
Enabled
公
-
-
-
公
-
-
R
Reverse
Gear
2.480
-
-
-
公
-
公
-
-
N
Neutral
Gear
-
Enabled
-
-
-
-
公
-
-
D
Gear 1
2.842
-
-
公
-
-
公*
-
公
Gear 2
1.529
-
-
公
-
-
-
公
-
Gear 3
1.000
-
-
公
-
公
-
-
-
Gear 4
0.712
-
-
公
-
公
-
公
-
3
Gear 1
2.842
-
-
公
-
-
公*
-
公
Gear 2
1.529
-
-
公
-
-
-
公
-
Gear 3
1.000
-
-
公
-
公
-
-
-
2
Gear 1
2.842
-
-
公
-
-
公*
-
公
Gear 2
1.529
-
-
公
-
-
-
公
-
L
Gear 1
2.842
-
-
公
-
-
公
-
-
* Low gear/reverse gear is applied when vehicle speed is lower than 10 km/h.
公 Operating components
On Board Diagnostic Logic
• Self-diagnosis detection logic.
DTC NO.
DTC DEFINITION
DTC DETECTION
CONDITION
DTC SET
CONDITION
POSSIBLE CAUSES
42
Second gear, ratio
out of limits
Vehicle is driving
• The Transaxle
Control Module
(TCM) will set this
DTC when the TCM
detected that 2nd
Gear Ratio Error is
already present. The
output shaft speed
signal is increased.
• If the DTC was
set 4 times, then the
A/T will be locked in
3rd gear (D gear).
• Input shaft speed
sensor
• Output shaft speed
sensor
• The retainer of
deceleration clutch
• Transfer case
driven and drive gear
• 2nd gear brake
system
• Low speed clutch
system
• Noise interference
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.
• After connection, press POWER key to start X-431.
DIAGNOSIS & TESTING
08
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