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1st gear incorrect ratio

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Faulty Input speed sensor

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Faulty output speed sensor

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Faulty UD clutch or LR brake or Oneway clutch

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Engine speed >400rpm

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Output speed >200rpm

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Lever position : D,3,2,L

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Input speed >300rpm

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A/T oil temp output ≥ -10℃

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TRANSAXLE RANGE SWITCH is normaland after 2sec is passed from IG ON

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ㅣInput speed/1st gear ratio - output speed|≥200rpm

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Locked into 3 rd gear.(If diagnosis code P0731 is output four times, the transaxle is locked into 3rd gear)

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Type : Hall sensor

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Current consumption : 22mA(MAX)

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Sensor body and sensor connector have been unified as one

Connect scantool to data link connector(DLC)

Monitor the "ENGINE SPEED, INPUT SPEED SENSOR, OUTPUT SPEED SENSOR, GEAR POSITION" parameter on the scantool

Perform the "STALL TEST" with gear position "1"

Specification : 2000~2700 engine rpm

OPERATING ELEMENT OF EACH SHIFTING RANGE

	UD/C	OD/C	REV/C	2ND/B	LR/B	OWC
P					●
R			●		●
N					●
D1	●				●	●
D2	●			●
D3	●	●
D4		●		●
L	●				●	●

note

Stall test procedure in D1 and reason

Procedure

1. Warm up the engine

2. After positioning the select lever in "D" ,depress the foot brake pedal fully after that, depress the accelerator pedal to the maximum

* The slippage of 1st gear operating parts can be detected by stall test in D

Reason for stall test

1. If there is no mechanical defaults in A/T, every slippage occur in torque converter.

2. Therfore, engine revolution is output, but input and output speed revolution must be "zero" due to wheel's lock.

3. If 1st gear operating part has faults, input speed revolution will be out.

4. If oupput speed revolution is output. It means that the foot brake force is not applied fully. Remeasuring is required.

Is "STALL TEST " within specifications?

	▶ Go to "W/Harness Inspection" procedure
	▶ Go to "Component inspection" procedure

caution

1. Do not let anybody stand in front of or behind the vehicle while this test is being carried out.

2. Check the A/T fluid level and temperature and the engine coolant temperature.

● Fluid level : At the hot mark on the oil level gauge.

● Fluid temperature : 176 ℉~ 212 ℉ (80~100 ℃).

● Engine coolant temperature : 176 ℉~ 212 ℉ (80~100 ℃).

3. Chock both rear wheel(left and right).

4. Pull the parking brake lever on with the brake pedal fully depressed.

5. The throttle should not be left fully open for more than eight second.

6. If carrying out the stall test two or more time, move the select lever to the "N" position and run the engine at 1,000 rpm to let the A/T fluid cool down before carrying out subsequent.

Connect scantool to data link connector(DLC)

Monitor the "INPUT & OUTPUT SPEED SENSOR" parameter on the scantool.

Accelerate the Engine speed until about 2000 rpm in the 1st gear.

Specification : INPUT SPEED - (OUTPUT SPEED × GEAR RATIO) ≤ 200 RPM

Are "INPUT & OUTPUT SPEED SENSOR" within specifications?

	▶ Go to "Component Inspection" procedure.
	▶ Check for electrical niose of circuit in INPUT & OUTPUT SPEED SENSOR or Replace INPUT & OUTPUT SPEED SENSOR. Repair as necessary and Go to "Verification Vehicle Repair" procedure .

Connect Oil pressure guage to "UD" and "L/R" port.

Drive a car with gear position 1 in "SPORTS MODE".

Compare it with referance data as below

Specification :

MANUAL V/V

POSITION

SHIFTING

ELEMENT

PRESSURE(Kgf/cm²)

PCSV-A

PCSV-B

PCSV-C

PCSV-D

ON/OFF

2-4(2ND)

REV

100

10.5±0.2

↑

5.7±0.4

↑

0.9±0.3

↑

100

↑

100

OFF

2-4(2ND)

10.5±0.2

↑

5.7±0.4

↑

0.9±0.3

↑

100

↑

10.5±0.2

↑

5.7±0.4

↑

0.9±0.3

↑

100

↑

10.5±0.2

↑

5.8±0.4

↑

1.0±0.3

↑

100

↑

REV

17.5±0.2

↑

17.5±0.2

↑

8.7±0.6

↑

0.9±0.5

↑

100

↑

※ The values are subject to change according to vehicle model or conditions

Is oil pressure value within specifications?

	▶ Repair AUTO TRANSAXLE(Clutch or Brake) as necessary and Go to "Verification Vehicle Repair" Repair " procedure.
	▶ Replace AUTO TRANSAXLE (BODY CONTROL VALVE faulty) as necessary and Go to "Verification Vehicle Repair " procedure.

Connect scan tool and select "Diagnostic Trouble Codes(DTCs)" mode.

Using a scantool, Clear DTC.

Operate the vehicle within DTC Enable conditions in General information.

Are any DTCs present ?

	▶ Go to the applicable troubleshooting procedure.
	▶ System performing to specification at this time.

Item	Detecting Condition	Possible Cause
DTC Strategy	● 1st gear incorrect ratio	● Faulty Input speed sensor ● Faulty output speed sensor ● Faulty UD clutch or LR brake or Oneway clutch
Enable Conditions	● Engine speed >400rpm ● Output speed >200rpm ● Lever position : D,3,2,L ● Input speed >300rpm ● A/T oil temp output ≥ -10℃ ● TRANSAXLE RANGE SWITCH is normaland after 2sec is passed from IG ON
Threshold Value	● ㅣInput speed/1st gear ratio - output speed\|≥200rpm
Diagnostic Time	● More than 1sec
Fail Safe	● Locked into 3 rd gear.(If diagnosis code P0731 is output four times, the transaxle is locked into 3rd gear)