1986 TOYOTA CAMRY V20 condition

TIME LAG TEST
If the shift lever is shifted while the engine is idling, there will be a certain time elapse or lag before
the shock can be felt. This is used for checking the condition of the O/D direct clutch, forward
clutch, direct clutch and first and reverse brake.
NOTICE: .
wPerform the test at normal operating fluid temperature (122 ± 176°F or 50 ± 80°C).
wBe sure to allow one minute interval between tests.
wMake three measurements and take the average value.
MEASURE TIME LAG
(a) Fully apply the parking brake.
(b) Start the engine and check the idle speed.
Idle speed (N range): 700 rpm (A540E and A540H)
(c) Shift the shift lever from N to D position. Using a stopwatch, measure the time it takes from shifting
the lever until the shock is felt.
Time lag: Less than 1.2 seconds.
(d) In the same manner, measure the time lag for N ± R.
Time lag: Less than 1.5 seconds.
EVALUATION
(a) If N ± D time lag is longer than specified:
wLine pressure too low
wForward clutch worn
wO/D one±way clutch not operating properly
(b) If N ± R time lag is longer than specified:
wLine pressure too low
wDirect clutch worn
wFirst and reverse brake worn
wO/D one±way clutch not operating properly
± AUTOMATIC TRANSAXLETroubleshooting (Mechanical System Tests) (A540E and
A540H)AT±223

HYDRAULIC TEST
PREPARATION
(a) Warm up the transaxle fluid.
(b) Remove the transaxle case test plug and connect the hydraulic pressure gauge.
SST 09992±00094 (Oil pressure gauge)
NOTICE:
wPerform the test at normal operating fluid temperature (122 ± 176°F or 50 ± 80°C)
wThe line pressure test should always be carried out in pairs. One should observe the conditions of
wheels or wheel stoppers outside the vehicle while the other is performing the test.
MEASURE LINE PRESSURE
(a) Fully apply the parking brake and chock the four wheels.
(b) Start the engine and check idling rpm.
(c) Step down strongly on the brake pedal with your left foot and shift into D range.
(d) Measure the line pressure when the engine is idling.
(e) Press the accelerator pedal all the way down. Quickly read the highest line pressure when engine
speed reaches stall speed.
(f) In the same manner, perform the test in R range.
(A540E)
kg/cm2 (psi, kPa)
Line pressure
D rangeR range
Idling
IdlingStallStall
± AUTOMATIC TRANSAXLETroubleshooting (Mechanical System Tests) (A540E and
A540H)AT±224

MEASURE CENTER DIFFERENTIAL CONTROL PRESSURE (A540H Only)
(a) Warm up the transaxle fluid (122 ± 176°F or 50 ± 80°C)
(b) Measure the line pressure. (See page AT±224)
(e) Remove the transfer case test plug and mount the oil pressure gauge (SST).
SST 09992±00094
(d) Check the parking brake to see that it is fully applied chock the four wheels.
(e) Disconnect the connector from ECT ECU.
(f) Start the engine.
(g) Apply battery voltage to terminal SD1, or SD2 of the wire harness side connector and turn the No. .1
and No. 2 center differential control solenoid valves to either ON or OFF.
(h) Shift into the L range, step down strongly on the brake pedal with your left foot and while manipulating the
accelerator pedal with the right foot, measure the pressure at the engine speeds specified in the table.
kg/cm2 (psi, kPa)
HINT: After inspecting the center differential control pressure, erase the diagnosis codes (No. 73 and 74)
from the memory.
Condition of
Solenoid
ValvesNo. 1 Solenoid
Valve
No. 2 Solenoid
Valve
Engine
RPML range
Range
Idling
Stall
± AUTOMATIC TRANSAXLETroubleshooting (Mechanical System Tests) (A540E and
A540H)AT±226

INSPECTION OF ELECTRONIC CONTROL
COMPONENTS
1. (A540E)
INSPECT VOLTAGE OF TCCS ECU CONNECTOR
(a) Turn on the ignition switch.
(b) Measure the voltage at each terminal.
Coolant temp. 176°F (84°C)
Cruise control main
switch OFFO/D main switch turned OFF O/D main switch turned ON Throttle valve fully closed
Throttle valve fully closed Brake pedal is depressed
Throttle valve fully openMeasuring condition
Brake pedal is released
Throttle valve open
Vehicle movingVehicle moving P, R or N range D, 2 or L range
Standing stillStanding still NORM patternVoltage (V)
PWR pattern Terminal
± AUTOMATIC TRANSAXLE(A540E and A540H)AT±216

2. (A540H)
INSPECT VOLTAGE OF ECT ECU CONNECTOR
(a) Turn on the ignition switch.
(b) Measure the voltage at each terminal.
Throttle valve fully closed to fully open
Throttle valve fully closed to fully openThrottle valve fully closedMeasuring conditionMeasuring condition
Throttle valve openExcept N rangeExcept R range
Except 2 range
Except L range
Voltage (V)Voltage IV1
R range Terminal
Terminal2 range N range
L range
± AUTOMATIC TRANSAXLETroubleshooting (Electronic Control System) (A540E and
A540H)AT±217

3. (A540E)
INSPECT SOLENOID VALVES
(a) Disconnect the connector from Engine and ECT ECU
(b) Measure the resistance between S1, S2, SL and
body ground.
Resistance: 11 ± 15


(e) Apply battery voltage to each terminal.
Check that an operation noise can be heard from
the solenoid.
Center differential control switch AUTO position
Center differential control switch AUTO position Center differential control switch turned OFF
Center differential control switch turned OFF Coolant temp. below 122°F950°0 Throttle valve fully closed to fully open
Coolant temp. above 122°F (50°C0 O/D main switch turned OFF O/D main switch turned ON
Brake pedal is depressed
Brake pedal is releasedMeasuring condition
Except 2 range
Except N range Except P range
Except L range
NORM patternVoltage (V)
PWR pattern Terminal
N range2 range P range
L range
± AUTOMATIC TRANSAXLETroubleshooting (Electronic Control System) (A540E and
A540H)AT±218

(A540E)
INSPECT NO. 2 SPEED SENSOR
(a) Jack up a front wheel on one side.
(b) Connect an ohmmeter between the terminals.
(c) Spin the wheel and check that the meter needle
deflects from 4 to 8W
10. (A540E)
INSPECT NO. 1 SPEED SENSOR IN COMBINATION
METER
(a) Remove the combination meter.
(b) Connect an ohmmeter between terminals A and B.
(c) Revolve the meter shaft and check that the mete
needle repeatedly deflects from 0 W to 8W 7. (A540E, A540H)
INSPECT NEUTRAL START SWITCH
Using an ohmmeter, check the continuity of the termi-
nals for each switch position shown in the table below.
(A540H)
8. (A540E, A540H)
INSPECT THROTTLE POSITION SENSOR
Using an ohmmeter, check the resistance between
each terminal.
Throttle valve
conditionResistance (kW )
Fully closed
Fully closed
Fully open
Terminal
TerminalRange
Open
± AUTOMATIC TRANSAXLETroubleshooting (Electronic Control System) (A540E and
A540H)AT±220

INSPECTION OF ELECTRIC CONTROL
COMPONENTS
1. INSPECT SHIFT LOCK CONTROL COMPUTER
Using a voltmeter, measure the voltage at each termi-
nals.
HINT: Do not disconnect the computer connector.
2. INSPECT SHIFT LOCK SOLENOID
(a) Disconnect the solenoid connector.
(b) Using an ohmmeter, measure the resistance be-
tween terminals.
Standard resistance: 21 ± 27


(c) Apply the battery voltage between terminals.
Check that an operation noise can be heard
from the solenoid.
Ignition switch 4N, P range and depress brake pedal Ignition switch ACC position and except P range
Shift except P range under conditions above
Shift except P range under condition above Ignition switch ACC position and P range
Ignition switch ACC position and P range Ignition switch ON position and P range Ignition switch ACC position
(Approx.±after 20 seconds) Ignition switch ON position
(Approx.±after one second) Depress brake pedalMeasuring condition
Depress brake pedal
Except P rangeVoltage (V)
ConnectorTerminal
± AUTOMATIC TRANSAXLEShift Lock SystemAT±410