10191648-10191645-10191666-10191669-10191654-10191651-10191660-10191657-10191663

COMPONENT LOCATION

GENERAL DESCRIPTION

The value of the input shaft speed should be equal to the value of the output shaft speed, when multiplied by the 3rd gear ratio, while the transaxle is engaged in the 3rd gear. For example, if the output speed is 1,000 rpm and the 3rd gear ratio is 1.000, then the input speed is 1,000 rpm.

DTC DESCRIPTION

This code is set if the value of input shaft speed is not equal to the value of the output shaft, when multiplied by the 3rd gear ratio, while the transaxle is engaged in 3rd gear. This malfunction is mainly caused by mechanical troubles such as control valve sticking or solenoid valve malfunctioning rather than an electrical issue.

DTC DETECTING CONDITION

Item	Detecting Condition	Possible cause
DTC Strategy	● 3rd gear incorrect ratio	● Faulty Input speed sensor ● Faulty output speed sensor ● Faulty UD clutch or OD clutch
Enable Conditions	● Engine speed ＞450rpm ● Output speed ＞900rpm ● Shift stage 3rd. gear ● Input speed ＞0rpm ● A/T oil temp sensor voltage ＜4.5V ● Voltage of Battery ＞10V ● TRANSAXLE RANGE SWITCH is normal and after 2sec is passed from IG ON
Threshold value	● ㅣInput speed/3rd gear ratio - output speed ㅣ≥200rpm
Diagnostic Time	● More than 1sec
Fail Safe	● Locked into 3rd gear. (If diagnosis code P0733 is output four times, the transaxle is locked into 3rd gear)

SIGNAL WAVEFORM

MONITOR SCANTOOL DATA

Connect scantool to data link connector(DLC).

Engine "ON".

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

Disconnect the solenoid valve connector and perform the "STALL TEST".

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		●		●

※ Low ＆ Reverse Brake is released when the vehicle speed is over 7Km/h(5 MPH).

Stall test procedure in D3 and reason

Procedure

Warm up the engine

Set 3rd gear hold by disconnecting the solenoid valve connector. Fully depress the brake pedal, then place the transaxle gear lever into "D" range. Press and hold the accelerator pedal to the floor for no more than eight seconds while observing the engine, input speed,

and output speed RPM values.

* The slippage of 3rd gear operating parts can be detected by stall test in D3

Reason for stall test

If there is no mechanical defaults in A/T, all slippage occurs in torque converter.

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

If OD clutch system(3rd gear operating part) has faults, input speed revolution will be out of specification.

If output speed revolution is output. It means that the foot brake force is not applied fully. Retesting using greater braking force is required.

Is "STALL TEST " within specification?

▶ Go to "Signal Circuit Inspection" procedure.

▶ Go to "Component Inspection" procedure.

caution

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

● 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 : 80~100 °C (176 °F~ 212 °F).

Engine coolant temperature : 80~100 °C (176 °F~ 212 °F).

● Chock both rear wheels(left and right).

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

● The throttle should not be left fully open for more than eight seconds.

● If carrying out the stall test two or more times, 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 tests.

SIGNAL CIRCUIT INSPECTION

Connect Scantool.

Engine "ON".

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

Accelerate the Engine speed until about 2000 rpm in the 3rd 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 noise of circuit in INPUT ＆ OUTPUT SPEED SENSOR or replace INPUT ＆ OUTPUT SPEED SENSOR. Repair as necessary and go to "Verification of Vehicle Repair" procedure.

COMPONENT INSPECTION

Connect Oil pressure gauge to "UD" and "OD" port.

Engine "ON".

Drive a car with gear position 3 in fail mode.

Compare it with reference data as below.

Specification : shown below

Measurement condition			Standard hydraulic pressure kPa (psi)
Selector lever position	Shift position	Engine speed (rpm)	Under drive clutch pressure	Reverse clutch pressure	Overdrive clutch pressure	Low＆reverse brake pressure	Second brake pressure	Damper clutch Apply pressure (DA)	Damper clutch Release pressure (DR)
P	-	2,500	-	-	-	260-340 (38-50)	-	-	-
R	Reverse	2,500	-	1,270-1,770 (185-256)	-	1,270-1,770 (185-256)	-	-	-
N	-	2,500	-	-	-	260-340 (38-50)	-	-	-
D	1st gear	2,500	430-510 (62-74)	-	-	1,010-1,050 (146-152)	-	-	-
	2nd gear	2,500	430-510 (62-74)	-	-	-	430-510 (62-74)	-	-
	3rd gear	2,500	430-510 (62-74)	-	430-510 (62-74)	-	-	More than 730 (100)	0-10 (0-1)
	4th gear	2,500	-	-	430-510 (62-74)	-	780-880 (110-130)	More than 730 (100)	0-10 (0-1)

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

Is oil pressure value within specification?

▶ Repair AUTO TRANSAXLE(Clutch or Brake) as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Replace AUTO TRANSAXLE (BODY CONTROL VALVE faulty) as necessary and go to "Verification of Vehicle Repair " procedure.

VERIFICATION OF VEHICLE REPAIR

After a repair, it is essential to verify that the fault has been corrected.

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.