Chery Tiggo. Manual — part 288
41 - First 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
41
First gear, ratio out
of limits
Vehicle is driving
• The Transaxle
Control Module
(TCM) will set this
DTC when the TCM
detected that 1st
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
• Low/Reverse
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
• Turn ignition switch on, with the scan tool, view and erase stored DTCs in the TCM.
• Start engine and warm it to normal operating temperature, then select ⬙D⬙ position.
• Drive the vehicle in 1st, 2nd, 3rd and 4th gears.
• 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 :
Checking the automatic transaxle fluid quality and fluid level is the most basic check of the automatic transaxle. The
fluid check is also an important inspection to determine if the transaxle will need to be disassembled.
CAUTION:
The burnt scent of ATF fluid indicates that the transaxle fluid is contaminated. The tiny particles in
the fluid pan indicate that the transaxle is worn out and it will be necessary to overhaul the trans-
axle.
NOTE :
While performing electrical diagnosis & testing, always refer to the electrical schematics for specific circuit
and component information.
Diagnostic Procedure
1.
CHECK FLUID QUALITY AND FLUID LEVEL AND DTC
• Drive the vehicle, until the ATF reaches operating temperature (70° - 80°C).
• Park the vehicle on level ground.
• Shift the gear selector lever to all gear positions once, then shift to gear “N”.
• Clean and check the outside of the dipstick and remove the dipstick to check the fluid level.
• 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:
GEAR
POSITION
ELECTRO-MAGNETIC VALVE
L/R
GEAR
2
UD
OD
DCC
(REF)
Gear 1
Off
On
Off
On
Off
Gear 2
On
Off
Off
On
On
Gear 3
On
Off
Off
Off
On
Gear 4
On
Off
On
Off
On
Reverse
gear
Off
On
On
On
Off
Neutral
gear/
Parking
Off
On
On
On
Off
Is DTC 22 or 23 present?
Yes
>>
If DTC 22 present, see diagnostic procedure for DTC 22 in 08 - Transaxle & Transfer Case.
If DTC 23 present, see diagnostic procedure for DTC 23 in 08 - Transaxle & Transfer Case.
No
>>
Go to the next step.
DIAGNOSIS & TESTING
2.
HYDRAULIC TEST
• Preheat the fluid from engine to transaxle to 80-100°C.
• Lift the vehicle until the wheels can rotate freely.
• Connect the special fluid pressure gauge on the
fluid pressure test port.
Test Port
TEST
PORT
1
2
3
4
5
6
7
Fluid
pressure
test port
name
2nd (Gear
2 Brake)
fluid
pressure
UD (Low
Speed
Clutch)
fluid
pressure
L/R
(Low/
Reverse
Gear
Brake)
fluid
pressure
DA (Damper
Clutch
Engagement)
fluid
pressure
DR (Damper
Clutch
Disengagement)
fluid pressure
RV
(Reverse
Gear
Clutch)
fluid
pressure
OD
(Overdrive
Clutch)
fluid
pressure
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
P
-
2,500
-
-
-
310 - 390
(45 - 56)
-
250 - 390
(36 - 56)
R
Reverse
Gear
2,500
-
1,270 -
1,770
-
1,270 -
1,770
-
500 - 700
(73-101)
N
Neutral
Gear
2,500
-
-
-
310 - 390
(45 - 56)
-
250 - 390
(36 - 56)
DIAGNOSIS & TESTING
LTSMD080018
08
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