Suzuki Grand Vitara 1998, Service Manual

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YH4
GRAND
VITARA
7B1-28 AUTOMATIC TRANSMISSION (4 A / T)
T
ransmission fluid
Running condition
Running condition
Gear shift
TROUBLE DIAGNOSIS TABLE 1
Condition Possible Cause Correction
TCC does not operate Brake pedal (stop lamp) switch or its
circuit faulty (H25 engine only)
4WD low switch or its circuit faulty
Engine coolant temp. sensor or its
circuit faulty
Cruise control signal circuit faulty
(if equipped)
DIAGNOSTIC FLOW TABLE A-1
Gear does not change
to 4th O / D cut switch or its circuit faulty
4WD low switch or its circuit faulty
Engine coolant temp. sensor or its
circuit faulty
Cruise control signal circuit faulty
(if equipped)
DIAGNOSTIC FLOW TABLE A-2
TROUBLE DIAGNOSIS TABLE 2
Condition Possible Cause Correction
Low fluid pressure Clogged oil pump strainer
Malfunction of pressure regulator valve
Wash strainer.
Overhaul valve body.
High fluid pressure Pressure regulator valve Overhaul valve body.
Unable to run in all
range
Regulator valve stick Replace.
Clogged oil strainer Wash strainer.
Seized or broken planetary gear Repair or replace.
Faulty manual valve Replace.
Poor 1st speed run-
ning or excessive
slippage in “D” or
“2” Faulty 1–2 shift valve Replace.
Poor 1–2 shift, ex-
i li
Regulator valve sticking Replace.
cessive slippage
1–2 shift valve sticking Replace.
Shift solenoid valve-B sticking Replace.
Intermediate coast modulator valve stick-
ing Replace.
Poor 2–3 shift, ex-
i li
2–3 shift valve sticking Replace.
cessive slippage
Shift solenoid valve-A sticking Replace.
Poor start or surg-
ing in “D” range Regulator valve sticking Replace.