7976889-7976887-7976901-7976903-7976905-7976893

Component Location

General Description

Input speed sensor value must be equal Output speed sensor value times each gear ratio at each gear position of trasmission. That operation value equal with TCM operation value. For example Output speed sensor value is 1000RPM and 4th speed gear ratio is 1.4 then Input speed sensor value must be 1400 RPM.

DTC Description

This code is set when Input speed sensor value is different with TCM operation value, caused by control valve sticking, solenoid valve fault(most of fault is mechanical, rarely electrical fault).

DTC Detecting Condition

Item	Detecting Condition	Possible Cause
DTC Strategy	• 4th gear incorrect gear ration	• Input speed sensor fault • Output speed sensor fault • Clutch slip in Transmission ( UD brake, OD clutch) or oil pressure controller fault
Enable Conditions	• Solenoid power voltage> 10V • Oil Temperature Sensor >-10℃ • Time after shift changing finish > 1sec • Engine speed >400rpm • Output speed >200rpm • Input speed > 0rpm • Shift stage 4th. gear • TR switch = "D"range
Threshold value	• Output speed>(input speed+200rpm)/4th. gear ratio • Output speed<(input speed-200rpm)/4th. gear ratio
Detecting Time	• 1 sec and 4 times
Fail safe	• Locked into 4th gear

Specification

Operating step table at each status

	Solenoid
	SS-A	SS-B	OD N-H	35R N-H	UD N-H	26 N-L
N,P	○	○		○	○
1st	○		△	○
2nd			○	○		○
3rd		○	○
4th				○
5th		○			○
6th				○	○	○
L	○			○
REV	○	○	△		○

○ : Connected status

△ : Connedted at Vehicle speed above 8km/h

	Clutch		Brake
	35R	OD C	26 B	UD B	LR B	O.W.
P,N					●
R	●				●
D1				●	○	●
D2			●	●
D3	●			●
D4		●		●
D5	●	●
D6		●	●

○ : Operated at Vehicle speed under 5km/h

Signal Waveform & Data

Fig 1) "D" range 4th gear