Kia Rio: Automatic Transaxle System
Kia Rio 2017-2024 YB Service Manual / Automatic Transaxle System
Specifications
| Specifications |
Automatic Transaxle
|
Item |
Specification |
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Transaxle model |
A4CF1 |
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Engine model |
Gasoline 1.4 MPI |
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Torque converter type |
3-element, 1-stage, 2-phase type |
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Torque converter size |
Φ 225 mm (8.8583 in.) |
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Oil pump type |
Parachoid |
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*ATF |
Capacity |
6.8 L (1.8 U.S gal., 7.2 U.S.qt., 5.98 Imp.qt.) |
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Recommended |
- ATF SP-Ⅲ ·Recommended transaxle fluid : SK ATF SP-III, MICHANG ATF SP-III, NOCA ATF SP-III |
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Gear ratio |
1st |
2.919 |
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2nd |
1.551 |
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3rd |
1.000 |
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4th |
0.713 |
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Reverse |
2.480 |
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Final gear ratio |
4.375 |
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Component elements |
Oil filter |
1 unit |
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Clutch |
3 units |
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One-way clutch |
1 unit |
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Brake |
2 units |
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Planetary gear |
2 units |
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Fluid pressure balance piston |
2 units |
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Accumulator |
4 units |
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Solenoid valve |
6 units (*PWM : 5, *VFS : 1) |
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*PWM : Pulse Width Modulation
*VFS : Variable Force Solenoid
Sensors
|
Item |
Specification |
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Oil temperature sensor |
Type |
*NTC thermistor |
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Temp.[(°C)°F] / Resistance (kΩ) |
(-40)-40 / 139.5 |
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(-20)-4.0 / 47.4 |
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(0)32.0 / 18.6 |
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(20)68.0 / 8.1 |
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(40)104.0 / 3.8 |
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(60)140.0 / 1.98 |
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(80)176.0 / 1.08 |
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(100)212.0 / 0.63 |
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(120)248.0 / 0.38 |
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(140)284.0 / 0.25 |
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(160)320.0 / 0.16 |
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Input speed sensor |
Type |
Hall effect sensor |
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Current (mA) |
22 (Max) |
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Output voltage (V) |
High : 4.8 - 5.2 |
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Low : Below 0.8 |
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Output speed sensor |
Type |
Hall effect sensor |
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Current (mA) |
22 (Max) |
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Output voltage (V) |
High : 4.8 - 5.2 |
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Low : Below 0.8 |
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*NTC: Negative Temperature Coefficient
Solenoid Valves
|
Item |
Specification |
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*PCSV-A |
Type |
Normal open |
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Input voltage |
12 V |
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Coil resistance |
3.5 ± 0.2 Ω (at 25°C, 77°F) |
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|
Frequency |
50 Hz |
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*PCSV-B |
Type |
Normal open |
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Input voltage |
12 V |
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Coil resistance |
3.5 ± 0.2 Ω (at 25°C, 77°F) |
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Frequency |
50 Hz |
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*PCSV-C |
Type |
Normal open |
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Input voltage |
12 V |
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Coil resistance |
3.5 ± 0.2 Ω (at 25°C, 77°F) |
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|
Frequency |
50 Hz |
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*PCSV-D |
Type |
Normal open |
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Input voltage |
12 V |
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Coil resistance |
3.5 ± 0.2 Ω (at 25°C, 77°F) |
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Frequency |
50 Hz |
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*SCSV-A |
Type |
Normal open |
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Input voltage |
12 V |
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Coil resistance |
3.5 ± 0.2 Ω (at 25°C, 77°F) |
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Frequency |
50 Hz |
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*LINE_VFS |
Type |
Normal open |
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Input voltage |
12 V |
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Coil resistance |
3.5 ± 0.2 Ω (at 25°C, 77°F) |
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Frequency |
400 - 1000 Hz |
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*PCSV-A : Overdrive clutch, Low&Reverse brake control solenoid valve
*PCSV-B : 24 brake control solenoid valve
*PCSV-C : Underdrive clutch control solenoid valve
*PCSV-D : Damper clutch control solenoid valve
*SCSV-A : ON/OFF solenoid valve
*LINE_VFS : Line pressure control solenoid valve
Solenoid Valve Operation Table
|
Range |
Solenoid Valve |
||||
|
*PCSV-A |
*PCSV-B |
*PCSV-C |
*PCSV-D |
*SCSV-A |
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|
N, P |
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● |
● |
|
● |
|
1st |
● |
● |
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|
● |
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2nd |
● |
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|
● |
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3rd |
|
● |
|
● |
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4th |
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|
● |
● |
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Reverse |
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|
● |
|
● |
Clutch & Brake Operation Table
|
Range |
Clutch |
Brake |
|||
|
UD |
OD |
REV |
L&R |
2ND |
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N, P |
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|
● |
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1 |
● |
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|
● |
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2 |
● |
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● |
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3 |
● |
● |
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4 |
|
● |
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● |
|
R |
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● |
● |
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Tightening Torques
|
Item |
N·m |
Kgf·m
|
lb·ft
|
|
Manual control lever mounting nut |
16.7 - 20.6 |
1.7 - 2.1 |
12.3 - 15.2 |
|
Inhibitor switch mounting nut |
9.8 - 11.8 |
1.0 - 1.2 |
7.2 - 8.7 |
|
Shift cable bracket mounting bolt |
14.7 - 21.6 |
1.5 - 2.2 |
10.8 - 15.9 |
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Shift cable mounting nut |
9.8 - 13.7 |
1.0 - 1.4 |
7.2 - 10.1 |
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Shift cable retainer mounting nut |
11.8 - 14.7 |
1.2 - 1.5 |
8.7 - 10.8 |
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Shift lever mounting bolt |
8.8 - 13.7 |
0.9 - 1.4 |
9.4 - 10.1 |
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Torque converter mounting bolt |
45.1 - 52.0 |
4.6 - 5.3 |
33.3 - 38.3 |
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Transaxle support bracket mounting bolt |
58.9 - 78.5 |
6.0 - 8.0 |
43.4 - 57.8 |
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Transaxle mounting bracket bolt |
88.3 - 107.9 |
9.0 - 11.0 |
65.1 - 79.6 |
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Roll rod support bracket mounting bolt |
49.0 - 68.6 |
5.0 - 7.0 |
36.2 - 50.6 |
|
Roll rod bracket mounting bolt |
49.0
- 63.7 |
5.0 - 6.5 |
36.2 - 47.0 |
|
107.9 - 127.5 |
11.0 - 13.0 |
79.6 - 94.0 |
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Starter mounting bolt |
49.0 - 63.7 |
5.0 - 6.5 |
36.2 - 47.0 |
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Transaxle upper mounting bolt |
42.2 - 53.9 |
4.3 - 5.5 |
31.1 - 39.8 |
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Transaxle lower mounting bolt |
42.2 - 53.9 |
4.3 - 5.5 |
31.1 - 39.8 |
|
42.2 - 48.1 |
4.3 - 4.9 |
31.1 - 35.4 |
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|
ATF drain plug |
39.2 - 49.0 |
4.0 - 5.0 |
28.9 - 36.2 |
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Transaxle control module mounting nut |
9.8 - 11.8 |
1.0 - 1.2 |
7.2 - 8.7 |
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Valve body cover mounting bolt |
9.8 - 11.8 |
1.0 - 1.2 |
7.2 - 8.7 |
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Valve body assembly mounting bolt |
9.8 - 11.8 |
1.0 - 1.2 |
7.2 - 8.7 |
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Solenoid valve support bracket mounting bolt |
9.8 - 11.8 |
1.0 - 1.2 |
7.2 - 8.7 |
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Input & output speed sensor mounting bolt |
9.8 - 11.8 |
1.0 - 1.2 |
7.2 - 8.7 |
|
Oil filter mounting bolt |
9.8 - 11.8 |
1.0 - 1.2 |
7.2 - 8.7 |
Special service tools
| Special Service Tools |
|
Tool Name / Number |
Illustration |
Description |
|
Engine support fixture (bar) 09200-3N000 |
|
Used for holding engine assembly when removing / installing transaxle
Used with the adapter (09200-4X000) and supporter (09200-2S000) |
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Engine support fixture (supporter) A : 09200-2S000 B : 09200-2S100 C : 09200-2S200 |
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Used for holding engine assembly when removing / installing transaxle
Used with the bar (09200-3N000) and adapret (09200-4X000) |
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Engine support fixture (adapter) 09200-4X000 |
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Used for holding engine assembly when removing / installing transaxle
Used with the bar (09200-3N000) and supporter (09200-2S000) |
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Oil seal installer 09453-2F300 |
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Used for installing differential oil seal |
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Oil pressure gauge (adapter) 09452-21000 |
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Measurement of the oil pressure (use with 09452-21500) Used for measuring oil pressure Used with the oil pressure gauge (09452-21500) and adapter (09452-21600) |
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Oil pressure gauge 09452-21500 |
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Used for measuring oil pressure Used with the adapter (09452-21000, 09452-21600) |
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Oil pressure gage (adapter) 09452-21600 |
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Used for measuring oil pressure Used with the oil pressure gauge (09452-21500) and adapter (09452-21000) |
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Inhibitor switch guide pin 09480-A3800 |
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Used for fixing ""N"" range when installing inhibitor switch |
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Enging hanger 09221-A3100 |
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Used for holding engine assembly when removing / installing transaxle
Used with the engine support fixture |
Engine support fixture assembly drawing
Troubleshooting
| Troubleshooting |
Limp Home Mode
Features a fail-safe function that prevents dangerous situations in the event of a transaxle failure. The vehicle will be driven in limp home mode if the transaxle malfunctions. In this mode, the transaxle operates at a minimal functionality level (fixed shifting, limited shifting, reverse, neutral), making it possible for the vehicle to reach a service center.
Limp Home Mode : Limited shifting Mechanical limp home mode : Fixed shifting (failure of mechanical parts, solenoid valves, TCM) |
Troubleshooting
|
Trouble symptom |
Suspected area |
Remedy |
|
Shifting delay, Shifting shock, Poor acceleration |
Damaged clutch / brake |
Replace the brake or clutch. |
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Faulty hydraulic control |
Inspect the solenoid valve. |
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Faulty hydraulic supply |
Inspect the fluid level. |
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Inspect the fluid cleanliness |
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Replace the oil pump. |
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TCM learning not performed |
Perform the TCM adaptive value learning. |
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Mechanical limp home mode locked into 3rd, manual shifting disabled) |
Faulty Solenoid valve |
Inspect the solenoid valve. |
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Replace the valve solenoid valve. |
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Faulty clutch / brake |
Replace the brake or clutch. |
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Faulty inhibitor switch |
Replace the inhibitor switch. |
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Faulty TCM |
Replace the TCM. |
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Limp home mode locked into 4th, manual shifting (2nd -> 3rd, 3rd ->2nd enabled) |
Faulty input & output speed sensor |
Replace the input & output speed sensor. |
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Manual shifting disabled |
Faulty TCM |
Replace the TCM. |
|
Faulty connector connection |
Check the connection of manual mode connector. |
|
|
Faulty manual mode switch |
Replace the manual mode switch housing. |
- Automatic Transaxle Control System
- Transaxle Control Module (TCM)
- Transaxle Oil Temperature Sensor
- Input Speed Sensor
- Output Speed Sensor
- Inhibitor Switch
- Shift Lever
- Shift Cable
- Automatic Transaxle System
- Clutch & Brake
- Hydraulic System
Neutral Switch
Specifications
Specifications
Item
Specified
Type
ON / OFF
Operating condition
Neutral gear
...
Automatic Transaxle Control System
Description and operation
Description
Automatic transaxle control system relies on various measurements to determine
the current control status and determine the necessary compensation ...
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