Chery Tiggo. Manual — part 249
P0730 - Ratio Of Transaxle Error
DIAGNOSIS & TESTING
LTSMW080016T
Operating Components Condition
• Related Operating Components
RELATED OPERATING COMPONENT
GEARSHIFT
LEVER
POSITION
GEAR
RATIO
ENGINE
START
PARKING
MECHANISM
DRIVE
LOCK
2, 3, 4
GEAR
CLUTCH
(E2)
REVERSE
AND 1-3
GEAR
CLUTCH
(E1)
4 GEAR
BRAKE
(F1)
REVERSE
GEAR
BRAKE
(F2)
1, 2
GEAR
BRAKE
(F3)
P
Parking
-
Enabled
公
-
公
-
-
-
R
Reverse
Gear
-2.45
-
-
-
公
-
公
-
N
Neutral
Gear
-
Enabled
-
-
公
-
-
-
D
Gear 1
2.75
-
-
-
公
-
-
公
Gear 2
1.5
-
-
-
-
-
-
公
Gear 3
1.000
-
-
-
公
-
-
-
Gear 4
0.71
-
-
-
-
公
-
-
公 Operating components
On Board Diagnostic Logic
• Self-diagnosis detection logic.
DTC NO.
DTC DEFINITION
DTC DETECTION
CONDITION
DTC SET
CONDITION
POSSIBLE CAUSE
P0730
Ratio of transaxle
error
Vehicle is driving
The Transaxle
Control Module
(TCM) detects that a
Gear Ratio Error is
already present. The
DTC is set if the
fault happened
within seconds of a
shift.
• Input shaft speed
sensor
• Output shaft speed
sensor
• The retainer of
deceleration clutch
• Transfer case
driven and drive gear
• 2, 3, 4 gear clutch
(E2)
• Reverse and 1 - 3
gear clutch (E1)
• 4 gear brake (F1)
• Reverse gear
brake (F2)
• 1, 2 gear brake
(F3)
• 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.
• 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).
DIAGNOSIS & TESTING
08
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 and it will be necessary to overhaul the transaxle.
NOTE :
While performing electrical diagnosis & testing, always refer to the electrical schematics for specific circuit
and component information.
Diagnostic Procedure
1.
CHECK FLUID QUALITY, FLUID LEVEL AND DTC
• Drive the vehicle until the TFT reaches working temperature (70° - 80°C).
• Park the vehicle on level ground.
• Shift the gear selector lever to all gear positions once, stay in one gear about 5 seconds, then shift to gear
“N”.
• Clean and check the outside of 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:
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 not normal and DTC P0730, DTC P0715 or DTC P0720 present?
Yes
>>
If DTC P0715 is present, see DTC P0715 diagnostic procedure.
If DTC P0720 is present, see DTC P0720 diagnostic procedure.
No
>>
Go to the next step.
DIAGNOSIS & TESTING
2.
HYDRAULIC TEST
• Preheat the transaxle fluid to 80° - 100°C.
• Lift the vehicle until the wheels can rotate freely.
• Connect the special fluid pressure gage onto the
fluid pressure measurement port as (3).
CONNECTOR AND TEST CAVITY
CONNECTOR AND
CAVITY
1
2
3
Figure name
Output speed sensor
Fluid pressure sensor
Fluid pressure test port
STANDARD FLUID PRESSURE TEST
MEASURE STATUS
ENGINE SPEED (RPM)
STANDARD FLUID PRESSURE
(BAR)
Gear lever position
Not running
Below 0.2
D/R
820 RPM
2.6
D/R
1400 RPM
8.7
• In accordance with the shown status of standard fluid pressure measurement table, measure the fluid pressure
of measurement port. The measurement of 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.
• Remove and disassemble the DP0 Automatic Transaxle Assembly (See Automatic Transaxle Removal & Instal-
lation 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 the damaged components as needed.
DIAGNOSIS & TESTING
LTSMD080021
08
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