7985029-7985037-7984965-7985095-7985105-7985044-7985004

Component Location

General Description

TCM control 26/B-VFS solenoid valve by changed current for reducing 26 brake shock. And TCM charge pressure for reducing shift shock at 1st speed to 2nd speed by pre-Fill control.

DTC Description

This code is set when circuit open or short detected by TCM.

DTC Detecting Condition

Item	Detecting Condition	Possible Cause
DTC Strategy	• Monitoring voltage range(Circuit open/short check)	• Circuit open or short • 26/B-VFS solenoid • TCM
Enable Conditions	• Completely opened or closed • Gaer tightening • After change of speed > 0.3sec • 10V < Solenoid supplied power < 16V
Threshold value	• 50mA ≤ Feedback current(Circuit short) ≤ 550mA at operating • 50mA > Feedback current (Circuit open ) at operating
Detecting Time	• More than 0.2sec
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

–

Working temperature : -40℃∼150℃

–

Internal resistance : 5.1 ± 0.3 Ω( 25℃ normal temperature )

Diagnostic Circuit Diagram

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Signal Waveform & Data

Fig 1) Wave form of 26/B-VFS