oil pressure TOYOTA CAMRY V20 1986 Service Information

Valve body
spring
SpringFree length
mm (in.)Coil outer
diameter
mm (in.)Total
No. of
coilsColor
(Upper valve body)
Second coast modulator valve
B
1 orifice control valve
Down-shift plug
Throttle valve
Throttle modulator valve
Cut-back valve
No. 1 accumulator control valve
Lock-up relay valve27.5 (1.083)
24.8 (0.976)
29.8 (1.173)
30.7 (1.209)
21.7 (0.854)
21.8 (0.858)
28.1 (1.106)
26.6 (1.047)8.9 (0.350)
8.0 (0.315)
8.7 (0.343)
9.2 (0.362)
9.5 (0.374)
6.0 (0.236)
10.6 (0.417)
10.2 (0.402)14.6
12.0
13.5
9.5
9.5
13.5
13.0
11.5Brown
White
Yellow
Purple
Orange
Red
Yellow
Green
(Lower valve body)
Pressure relief valve
Check valve
Secondary regulator valve
No. 2 accumulator control valve
Second lock valve
3 - 4 shift valve
Low coast modulator valve
1 - 2 shift valve
2 - 3 shift valve
Primary regulator valve11.2 (0.441)
19.9 (0.783)
38.5 (1.516)
23.0 (0.906)
20.7 (0.815)
29.2 (1.150)
20.2 (0.795)
29.2 (1.150)
28.0 (1.102)
64.2 (2.528)6.4 (0.252)
11.0 (0.433)
8.4 (0.331)
6.3 (0.248)
6.1 (0.240)
8.9 (0.350)
7.9 (0.311)
8.9 (0.350)
9.4 (0.370)
18.6 (0.732)7.5
8.5
17.0
12.0
12.0
12.0
11.9
12.0
10.3
12.5None
None
Purple
Gray
Orange
Light green
Purple
Light green
None
None
Valve body
retainerRetainerHeight
mm (in.)Width
mm (in.)Thickness
mm (in.)
(Upper valve body)
Lock-up relay valve
Throttle modulator valve
Second coast modulator valve
Cut-back valve
No. 1 accumulator control valve
B
1 orifice control valve6.5 (0.256)
6.5 (0.256)
6.5 (0.256)
9.2 (0.362)
6.5 (0.256)
11.5 (0.453)5.0 (0.197)
5.0 (0.197)
5.0 (0.197)
5.0 (0.197)
5.0 (0.197)
5.0 (0.197)3.2 (0.126)
3.2 (0.126)
3.2 (0.126)
3.2 (0.126)
3.2 (0.126)
3.2 (0.126)
(Lower valve body)
Primary regulator valve
Secondary regulator valve
No. 2 accumulator control valve
Second lock valve
Low coast modulator valve
1 - 2 shift valve
2 - 3 shift valve
3 - 4 shift valve9.2 (0.362)
15.0 (0.591)
9.2 (0.362)
11.5 (0.453)
11.5 (0.453)
6.5 (0.256)
9.2 (0.362)
6.5 (0.256)5.0 (0.197)
5.0 (0.197)
5.0 (0.197)
5.0 (0.197)
5.0 (0.197)
5.0 (0.197)
5.0 (0.197)
5.0 (0.197)3.2 (0.126)
3.2 (0.126)
3.2 (0.126)
3.2 (0.126)
3.2 (0.126)
3.2 (0.126)
3.2 (0.126)
3.2 (0.126)
Specifications (Cont'd)
- SERVICE SPECIFICATIONSAutomatic Transaxle Transfer (A540E A540H)A-3

VALVE BODY
Hydraulic Control System

A540E, A540H
The hydraulic control system is composed of the oil pump, the valve body, the solenoid valves, the accu-
mulators, the clutches and brakes, and the governor valve as well as the fluid passages which connect all
of these components.
Based on the hydraulic pressure created by the oil pump, the hydraulic control system governs the hy-
draulic pressure acting on the torque converter, clutches and brakes in accordance with the vehicle driving
conditions.
There are three solenoid valves on the valve body.
The No. 1 and No. 2 solenoid valves are turned on and off by signals from ECU to operate the shift valves
and change the gear shift position.
The No. 3 solenoid valve is operated by signals from the ECU to engage or disengage the lock-up clutch
of the torque converter.

A540H
There are two center differential control solenoid valves on the transfer.
The solenoid valves are adjusting the center differential control pressure.
HYDRAULIC CONTROL SYSTEM
Hydr. pressure control
OIL PUMP
CLUTCHES & BRAKESFluid passage switchingPlanetary gear unit
Torque converter
Throttle Cable
SOLENOID VALVES
ECU
AT-8- AUTOMATIC TRANSAXLEOperation

AT0179 AT0180
AT7712
Printed
Numbers
AT4499
Oil Seal Ring
A540H A540E
AT2736 AT4340
Oil Seal Ring A540H
(A540H)
Remove the two oil seal rings from the shaft.
INSPECTION OF FORWARD CLUTCH
1. INSPECT CLUTCH PISTON
(a) Check that the check ball is free by shaking the
piston.
(b) Check that the valve does not leak by applying
low-pressure compressed air.
2. INSPECT DISCS, PLATES AND FLANGE
Check if the sliding surfaces of the discs, plates and
flange are worn or burnt. If necessary, replace them.
HINT:

If the lining of the disc is exfoliated or discolored, or
even a part of the printed numbers are defaced,
replace all discs.

Before assembling new discs, soak them in ATF for
at least fifteen minutes.
ASSEMBLY OF FORWARD CLUTCH
1. INSTALL OIL SEAL RINGS
Install the three oil seal rings (A540E) or two oil seal
rings (A540H) to the shaft.
NOTICE: Do not spread the ring ends more than nec-
essary.
HINT: After installing the oil seal rings, check that they
move smoothly.
2. INSTALL CLUTCH PISTON TO CLUTCH DRUM
(a) Install the two new O-rings to the piston.
AT-54- AUTOMATIC TRANSAXLEComponent Parts (Forward Clutch)

AT3476
AT3477Lock-up Relay Valve PlugLock-up Relay
Control Valve RetainerRetainerSleeve Plug RetainerNo. 1 Accumulator
Control Valve PlugCut-back Valve
PlugRetainer Modulator Valve ThrottleSleeve PinDown-shift PlugValve Vibrating Stopper Oil Strainer RetainerThrottle ValvePlate Washer
Wave Washer B
1 orifice
Control Valve PlugCheck Ball PlugSpring Retainer 2nd Coast
Modulator Valve
The throttle pressure is changed
according to the number of adjusting
rings.
When assembling the valve body,
install the same number of adjusting
rings as were removed.
Adjusting Ring
Pin
Cam
(Upper Valve Body)
COMPONENTS
- AUTOMATIC TRANSAXLEComponent Parts (Valve Body)AT-89

(Lower Valve Body)
COMPONENTS
AT4502
AT3483
Retainer Plug3 - 4 Shift Valve PlugRetainer PlugRetainer PlugNo. 2 Accumulator
Control Valve Retainer
2nd lock ValveCheck Ball Secondary Regulator ValveCheck Valve
Oil Strainer Pressure Relief ValveCheck Ball
Plunger Sleeve
The line pressure changes
according to the part of
the plunger sleeve which
comes into contact with
the retainer.
When reassembling the
valve body, position the
retainer in the same
position.
Retainer PlugPlunger RetainerRetainer Shift Valve Plug PlugPrimary Regulator
Valve Plate Washer 2 - 3 Shift Valve Retainer1 - 2 Shift Valve Low Coast Modulator Valve
AT-92- AUTOMATIC TRANSAXLEComponent Parts (Valve Body)

SpringFree length mm (in.)Coil outer diameter
mm (in.)Total No. of coils Color
Pressure relief valve11.2 (0.441) 6.4 (0.252)
7.5
None
Check valve19.9 (0.783) 11.0 (0.433)
8.5 None
Secondary regulator valve38.5 (1.516) 8.4 (0.331)
17.0
Purple
No. 2 accumulator control valve23.0 (0.906)6.3 (0.248)
12.0 Gray
Second lock valve20.7 (0.815) 6.1 (0.240)
12.0 Orange
3 - 4 shift valve29.2 (1.150) 8.9 (0.350)
12.0Light Green
Low coast modulator valve20.2 (0.795) 7.9 (0.311)
11.9 Purple
1 - 2 shift valve29.2 (1.150) 8.9 (0.350)
12.0Light Green
2 - 3 shift valve28.0 (1.102)9.4 (0.370)
10.3 None
Primary regulator valve64.2 (2.528)
18.6 (0.732)
12.5
None
SPECIFICATIONS OF VALVE BODY SPRINGS
HINT: During reassembly please refer to the spring specifications above to help discriminate the different
springs.
SECTIONAL VIEW OF VALVE BODY
AT3604
- AUTOMATIC TRANSAXLEComponent Parts (Valve Body)AT-93

(e) Tighten the O±ring fittings or the bolted type fittings to
the specified torque.
4. WHEN CONNECTING MANIFOLD GAUGE;
(a) Be sure to connect the charging hose end with a pin
to the compressor charging valve.
(b) The letter ºDº engraved near the compressor service
valve indicates the high pressure side, and ºSº indi-
cates the low pressure side. Pay careful attention
when connecting the hose.
(c) Tighten hose by hand.
(d) To prevent loosening of connected hose, do not apply
drops of compressor oil to the seat of connection.
HINT: After connecting the manifold gauge and the refrig±
erant container (service can), discharge any air in the
hoses.
5. WHEN EVACUATING;
Approx. 15 minutes after removal, check the system for
leaks, then take at least another 15 minutes to make sure
the air is fully removed.
6. WHEN HANDLING REFRIGERANT CONTAINER
(SERVICE CAN);
(a) Must never be heated.
(b) Must be kept below 4

°C (1 04°F).
(c) If warming service can with hot water, be careful that
the valve on top of the service can is never immersed
in the water, as the water may permeate into the refrig-
erant cycle.
(d) Empty service cans must never be re±used.
7. WHEN A/C IS ON AND REFRIGERANT GAS IS
BEING REPLENISHED;
(a) If there is not enough refrigerant gas in the refrigerant
cycle, oil lubrication becomes insufficient and com-
pressor burnout may occur, so take care to avoid this.
(b) If the valve on the high pressure side is opened, refrig-
erant flows in reverse and causes the service can to
rupture, so only open and close the vlave on the low
pressure side.
(c) If the service can is inverted and refrigerant is inserted
in a liquid state, the liquid is compressed and the com-
pressor brakes down, so the refrigerant must be in-
serted in a g¿¿seous state.
(d) Be careful not to insert too much refrigerant gas, as
this causes trouble such as inadequate cooling, poor
fuel economy, engine overheat, etc.
8. WHEN USING GAS±CYLINDER TYPE LEAK
DETECTION INSTRUMENT;
(a) As a naked flame is used, first make sure that there are
no flammable substances nearby before using it.
(b) Be careful, as poisonous gas is produced when
refrigerant gas comes in contact with heat parts.
± AIR CONDITIONING SYSTEMGenera! InformationAC±3

To evacuate and charge system
To perform electrical diagnosis
To perform electrical diagnosis
To perform electrical diagnosis
To remove and install pressure plate
To remove pressure plate
To remove and install rotor and stator Air conditioner service tool set
Ohmmeter
Voltage meter
Ammeter
Magnetic clutch stopper
Magnetic clutch remover
Snap ring pliers (External type)
SPECIAL TOOLS AND EQUIPMENT
SSM (SPECIAL SERVICE MATERIALS)
07110±58011
07112±76060
07112±66040
07114±84020
DENSOOIL 6,
SUNlSO No. 5GS or equivalent07117±68040
Compressor
Part NameSST No.
Part No.
Use etc. Tool
Use
± AIR CONDITIONING SYSTEMSpecial Tools and EquipmentAC±15

To evacuate and charge system
To perform electrical diagnosis
To perform electrical diagnosis
To perform electrical diagnosis
To remove and install pressure plate
To remove pressure plate
To remove and install rotor and stator Air conditioner service tool set
Ohmmeter
Voltage meter
Ammeter
Magnetic clutch stopper
Magnetic clutch remover
Snap ring pliers (External type)
SPECIAL TOOLS AND
EQUIPMENT
SSM (SPECIAL SERVICE MATERIALS)
07110±58011
07112±76060
07112±66040
07114±84020
DENSOOIL 6,
SUNlSO No. 5GS or equivalent07117±68040
Compressor
Part NameSST No.
Part No.
Use etc. Tool
Use
± AIR CONDITIONING SYSTEMSST (Special Service Materials)AC±15

*NOTE at No.6
These gauge indications are shown when the refrigeration system has been opened and the re-
frigerant charged without vacuum purging.
(1)Clean condenser
(2)Check fan motor operation
(3)If (1) and (2) are normal,
check refrigerant amount
HINT: Vent out refrigerant
through gauge manifold low
pressure side by gradually
opening valve.
(1)Replace receiver and drier
(2)Check compressor oil to
see if dirty or insufficient
(3)Vacuum purge and charge
new refrigerant Drier in oversaturated state
Moisture in refrigeration
system freezes at expansion
valve orifice and blocks
circulation of refrigerant(1)Replace receiver and
drier
(2)Remove moisture in cycle
through repeated vacuum
purging
(3)Charge refrigerant to proper
amount
Excess refrigerant in cycle ±
refrigerant overcharged
Condenser cooling
insufficient ± condenser fins
clogged or fan motor faulty Unable to develop
±sufficient performance due to
excessive refrigerant in system
Condenser cooling insufficientMoisture entered in
refrigeration system freeze
at expansion valve orifice
and temporarily stops
cycle, but normal state is
restored after a time when the
ice melts
Pressure too high at both low
and high pressure sides
Frost or large amount of dew
on piping at low pressure side(1)Check heat sensing
tube installed condition
(2)If (1) is normal, test
expansion valve in unit
(3) Replace if defective Pressure low at both low and
high pressure sides
Bubbles seen in sight glass
Insufficient cooling
performance
Air present in refrigeration
system
Insufficient vacuum
purging During operation, pressure at
low pressure side sometimes
becomes a vacuum and
sometimes normal
Trouble in expansion valve
or heat sensing tube not
installed correctly
Refrigerant flow out Pressure low at both low and
high pressure sides
Frost on tubes from
receiver to unit(1)Check with leak tester
and repair
(2)Charge refrigerant to
proper amount
Excess refrigerant in low
pressure piping
Expansion valve opened too
wideInsufficient refrigerant in
system
Refrigerant leaking
Pressure too high at both low
and high pressure sidesPressure too high at both
tow and high pressure sidesGas leakage at some place i n
refrigeration system
Refrigerant flow
obstructed by dirt in
receiver
Air entered refrigeration
system Symptom seen in
refrigeration system
Receiver clogged Replace receiver Probable causeDiagnosis
Remedy
No.
± AIR CONDITIONING SYSTEMTroubleshootingAC±19