light TOYOTA CAMRY V20 1986 Service Information

2. INSTALL DRIVE PINION SHAFT INTO CASE
Slightly tap the cage into the case until the groove with
the bore can be seen.
HINT: Drive in the bearing cage until the surface of the
bearing cage passes through the groove with the bore.
INSTALL AND ADJUSTMENT OF DRIVE
PINION ASSEMBLY
1. INSTALL NEW O±RING ONTO BEARING CAGE
3. INSTALL SNAP RING INTO CASE
(a) Using SST, install the snap ring into the groove.
SST 09350±32014 (09351±32050)
4. (A140E)
INSTALL ROTOR SENSOR
Install the rotor sensor, facing the magnet outward.(b) Slightly tap the drive pinion to fit the snap ring
into the groove.
± AUTOMATIC TRANSAXLEInstallation of Component Parts (A140L and A140E)AT±159

(c) Place the oil pump through the input shaft, and
align the bolt holes of the pump body with the
transmission case.
(d) Hold the input shaft, and lightly press the oil pump
body to slide the oil seal rings on the stator shaft
through the direct clutch drum.
NOTICE: Do not push on the oil pump strongly or the
oil seal ring will stick to the direct clutch drum.
33. INSTALL OIL PUMP INTO CASE
(a) Coat the race with petroleum jelly and install it onto
stator shaft.(h) Check the distance between the A and6 as
shown in the illustration.
Distance: Approx. 3 mm (0.118 in.)
(e) Install and tighten the seven bolts.
Torque: 225 kg±cm (16 ft±Ib, 22 N±m)
(b) Coat a new O±ring with ATF and install it to oil
pump.
± AUTOMATIC TRANSAXLEInstallation of Component Parts (A140L and A140E)AT±175

Diagnosis System
DESCRIPTION
1. A self±diagnosis function is. built into the electrical control
system. Warning is indicated by the overdrive OFF indicator.
HINT: Warning and diagnostic codes can be read only when
the overdrive switch is ON. If OFF, the overdrive OFF
indicator is lit continuously and will not blink.
(a) If a malfunction occurs within the speed sensors or sole-
noids, the overdrive OFF light will blink to warn the driver.
However, there will be no warning of a malfunction with
lock±up solenoid.
W The diagnostic code can be read by the number of
blinks of the overdrive OFF indicator when terminals
Tt and E1 are short±circuited. (See page AT± 191)
(c) The throttle position sensor or brake signal are not indicated,
but inspection can be made by checking the voltage at ter-
minal Tt of the check connector.
(d) The signals to each gear can be checked by measuring the
voltage at terminal Tt of the check connector while driving.
2. The diagnostic (malfunction) code is retained in memory by the
ECU and due to back±up voltage, is not canceled out when the
engine is turned off. Consequently, after repair, it is necessary
to turn the ignition switch off and remove the fuse EFI (15A)
(A540E) or DOME (20A)
(A540H) or disconnect the Engine and ECT ECU (A540E)
or ECT ECU (A540H) connector to cancel out the diagnostic
(malfunction) code. (See page AT±192)
HINT:
wLow battery voltage will cause faulty operation of the diag-
nosis system. Therefore, always check the battery first.
wUse a voltmeter and ohmmeter that have an impedance of
at least 10 k
/V.
CHECK O/D OFF INDICATOR LIGHT
1. Turn the ignition switch ON.
2. The O/D OFF light will come on when the O/D switch
placed at OFF.
3. When the O/D switch is set to ON, the O/D OFF light should go
out.
If the O/D OFF light flashes when the O/D switch is set to
ON, the electronic control system is faulty.
± AUTOMATIC TRANSAXLETroubleshooting (Diagnosis System) (A540E and A540H)AT±190

wn the event of a malfunction, the light will blink once
every 0.5 seconds. The number of blinks will equal
the first number and, after 1.5 seconds pause, the
second number of the two digit diagnostic code. If
there are two or more codes, there will be a 2.5 sec-
onds pause between each.
HINT: In the event of several trouble codes occurring
simultaneously, indication will begin from the smaller
value and continue to the larger.
4. REMOVE SST
SST 09843±18020
READ DIAGNOSTIC CODE
1. TURN IGNITION SWITCH AND O/D SWITCH TO ON
Do not start the engine.
HINT: Warning and diagnostic codes can be read only
when the overdrive switch is ON. If OFF, the overdrive OFF
light will light continuously and will not blink.
2. SHORT Tt TERMINAL CIRCUIT OF CHECK
CONNECTOR
Using SST, short terminals Tt and E1 of the check connector.
SST 09843±18020
3. READ DIAGNOSTIC CODE
Read the diagnostic code as indicated by the number of
times the O/D OFF light flashes.
(Diagnostic Code Indication)
wIf the system is operating normally, the light will blink
once every 0.25 seconds.
± AUTOMATIC TRANSAXLETroubleshooting (Diagnosis System) (A540E and A540H)AT±191

AT4B'
HINT: If codes 62, 63, 64, 73 or 74 appear, there is an electrical malfunction in the solenoid.
Causes due t mechanical failure, such as a stuck valve, will not appear.
If codes 44 and 61 appear, check the both (vehicle and rear wheel) speed sensors.
AT2020
HINT: If codes 62, 63 or 64 appear, there is an electrical malfunction in the solenoid. Causes due
to mechanical failure, such as a stuck valve, will not appear.
Severed No. 2 center differential control solenoid valve or short circuit
± severed wire harness or short circuit. Defective rear wheel speed sensor (in transfer left case) ±
severed wire harness or short circuit
Defective vehicle speed sensor (in differential carrier cover)
severed wire harness or short circuit
Severed No. 1 center differential control solenoid valve or short
circuit ± severed wire harness or short circuit. Defective No. 1 speed sensor (in combination meter) ±
severed wire harness or short circuit
DIAGNOSTIC CODES.
(A540E)
Severed lock±up solenoid or short circuit ±
severed wire harness or short circuit Severed lock±up solenoid or short circuit ±
severed wire harness or short circuitDefective No. 2 speed sensor (in ATM) ±
severed wire harness or short circuit
Severed No. t solenoid or short circuit ±
severed wire harness or short circuit
Severed No. 2 solenoid or short circuit ±
severed wire harness or short circuit Severed No. 1 solenoid or short circuit ±
severed wire harness or short circuit
Severed No. 2 solenoid or short circuit ±
severed wire harness or short circuitDiagnosis System
Diagnosis System Light Pattern
Light Pattern
(A540H)
Code No.
Code
No.
Normal Normal
± AUTOMATIC TRANSAXLETroubleshooting (Diagnosis System) (A540E and A540H)AT±192

TROUBLESHOOTING FLOW±CHART (A540E)
HINT:
wIf diagnostic code Nos. 42, 61, 62 or 63 are output, the overdrive OFF indicator light will begin to
blink immediately to warn the driver. However, an impact or shock may cause the blinking to stop;
but the code will still be retained in the Engine and ECT ECU memory until canceled out.
wThere is no warning for diagnostic code No. 64.
wIn the event of a simultaneous malfunction of both No. 1 and No. 2 speed sensors, no diagnostic
code will appear and the fail±safe system will not function. However, when driving in the D range,
the transaxle will not up±shift from first gear, regardless of the vehicle speed.
Check continuity between Engine and ECT
ECU connector SP, terminal and body ground.
(See page AT±216)
Check continuity between Engine and ECT
ECU connector SP2 terminal and body ground.
(See page AT±216)
1. Diagnostic code 42 (No. 1 speed sensor circuitry)
Check wiring between Engine and ECT ECU
and No. 2 speed sensor. Check wiring between Engine and ECT ECU
and combination meter.
2. Diagnostic code 61 (No. 2 speed sensor circuitry)
Check No. 2 speed sensor.
(See page AT±234) Substitute another Engine and ECT ECU.
Substitute another Engine and ECT ECU.Repair or replace No. 1 speed sensor.
Repair or replace No. 2
speed sensor. Check No. 1 speed sensor.
± AUTOMATIC TRANSAXLETroubleshooting (Diagnosis System) (A540E and A540H)AT±194

TROUBLESHOOTING FLOW±CHART (A540H)
HINT:
wIf diagnostic code Nos. 44, 61, 62, 63, 73 or 74 are output, the overdrive OFF indicator light will
begin to blink immediately to warn the driver.
However, an impact or shock may cause the blinking to stop; but the code will still be retained in
the ECT ECU memory until canceled out.
wThere is no warning for diagnostic code No. 64.
wIn the event of a simultaneous malfunction of both vehicle and rear speed sensors, no diagnostic
code will appear and the fail±safe system will not function. However, when driving in the D range,
the transaxle will not up±shift from first gear, regardless of the vehicle speed.
1. Diagnostic code 44 (Rear speed sensor circuitry)
Check continuity between ECT ECU NC
Check continuity between ECT ECU
connector RR+ terminal and RR± terminal.
(See page AT±217)
Check continuity between ECT ECU
connector FR+ terminal and FR± terminal.
(See page AT±217)
Check wiring between ECT ECU and vehicle
speed sensor. Check wiring between ECT ECU and rear
wheel speed sensor.
2. Diagnostic code 61 (Vehicle speed sensor circuitry)Repair or replace rear wheel speed
sensor. Check rear wheel speed sensor.
(See page AT±221)
Check vehicle speed sensor.
(See page AT±221)Repair or replace vehicle
speed sensor. Substitute another ECT ECU. Substitute another ECT ECU.
± AUTOMATIC TRANSAXLETroubleshooting (Diagnosis System) (A540E and A540H)AT±196

S. INSPECT AND ADJUST THROTTLE CABLE
(a) Depress the accelerator pedal all the way and check that
the throttle valve opens fully.
HINT: If the valve does not open fully, adjust the accelera-
tor cable.
(b) Fully depress the accelerator pedal.
(c) Measure the distance between the end of the boot and
stopper on the cable.
Standard distance: 0 ± 1 mm (0 ± 0.04 in.)
If the distance is not standard, adjust the cable by the ad-
justing nuts.
7. INSPECT AND ADJUST SHIFT CABLE
When shifting the shift lever from the ±N position to other
positions, check that the lever can be shifted smoothly and
accurately to each position and that the position indicator
correctly indicates the position.
If the indicator is not aligned with the correct position, carry
out the following adjustment procedures.
(a) Loosen the swivel nut on manual shift lever.
(b) Push the manual lever fully toward the right side of the ve-
hicle.
(c) Return the lever two notches to NEUTRAL position.
(d) Set the shift lever to N.
(e) While holding the lever lightly toward the R range side,
tighten the swivel nut.
8. ADJUST NEUTRAL START SWITCH
If the engine will start with the shift selector in any range
other than N or P range, adjustment is required.
(a) Loosen the neutral start switch bolts and set the shift se-
lector to the N range.
(b) Align the groove and neutral basic line.
(c) Hold in position and tighten the bolts.
Torque: 55 kg±cm (48 in.±lb, 5.4 N±m)
9. INSPECT IDLE SPEED IN RANGE)
Idle speed: 700 rpm
± AUTOMATIC TRANSAXLETroubleshooting (Preliminary Check) (A540E and A540H)AT±201

2. 2 RANGE TEST
Shift into the 2 range and, while driving with the accel-
erator pedal held constantly at the full throttle valve
opening position, push in one of the pattern selectors
and check or the following points.
(a) Check to see that the 1 ± 2 up±shift takes place and
that the shift point conforms to it shown on the auto-
matic shift schedule. (See page AT±230)
(b) While running in the 2 range and 2nd gear, release
the accelerator pedal and check the engine braking ef-
fect.
EVALUATION
If there is no engine braking effect:
w Second coast brake is defective (f) Check for the lock±up mechanism.
(1) Drive in D range, O/D gear, at a steady speed
(lock±up ON) of about 75 km/h (47 mph).
(2) Lightly depress the accelerator pedal and check
that the engine rpm does not change abruptly.
If there is a big jump in engine rpm, there is no
lock±up. (d) While running in the D range, 2nd, 3rd and O/D
gears, check to see that the possible kick±
down vehicle speed limits for 2 ± 1, 3 ± 2 and
O/D ± 3 kickdowns conform to those indicated
on the automatic shift schedule. (See page
AT±230)
(e) Check for abnormal shock and slip at kick±down.
(c) Check for abnormal noise at acceleration an4
deceleration, and for shock at up±shift and
down shift.
± AUTOMATIC TRANSAXLETroubleshooting (Mechanical System Tests) (A540E and
A540H)AT±228

*: O/D switch OFF
HINT:
(1) Lock±up will not occur in 2nd gear unless the throttle valve opening is greater than 50%.
(2) There is no lock±up in the 2 and L ranges.
(3) In the following cases, the lock±up will be released regardless of the lock±up pattern.
wWhen the throttle is completely closed.
wWhen the brake light switch is ON.
(4) When the coolant. temp. is below 140
°F (60°C) (A540E) or 122°F (50°C) (A540H), the shift point is lower
than specified vehicle speed.
Automatic Shift Schedule
(A540E)
Throttle valve opening 5%
Throttle valve opening 5%Throttle valve fully open
Throttle valve fully open
*: O/D switch
OFF
(A540H)
Lock±up ON[fully closed]
Lock±up OFFkm/h (mph) Lock±up OFFkm/h (mph)
[fully closed]
km/h (mph)
Lock±up ONkm/h (mph) NORM
PWR NORM
PWR
NORM
PWRNORM
PWR
D range D range
D range
2 range
D range
2 range
L range
L rangeNORM
NORM NORM
NORM
PWR PWR PWR
PWR
± AUTOMATIC TRANSAXLETroubleshooting (Automatic Shift Schedule) (A540E and
A540H)AT±230