check engine TOYOTA CAMRY V20 1986 Service Information

AMPLIFIERS
Inspection of Amplifier
(See page AC±12)
Air Conditioner Amplifier
INSPECT AMPLIFIER CIRCUIT
Disconnect the amplifier and inspect the connector on the
wire harness side as shown in the chart below.
Test conditions:
(1) Ignition: ON
(2) Temperature control lever: MAX. COOL
(3) Blower switch: Hl
If circuit is as specified, replace the amplifier.
ApProx. 1.7 k
at 25°C (77°F)
3S±FE Engine Model
Turn ignition switch off.Turn ignition switch on.
Turn ignition switch off.Turn ignition switch on.
Turn ignition switch off.
Turn ignition switch on.Turn A/C switch off.
Turn A/C switch on.
Turn A/C switch off.Turn A/C switch on.
4pprox. 10 to 14 V
Tester
connectionSpecified value
Battery voltage
Battery voltageBattery voltageBattery voltage
Battery voltage
ApproX. 250 W Start engine.
Stop engine.No voltageNo voltage
No voltage
No voitage
No voltageNo voltage ContinuityContinuity
Resistance
Condition
Check for
Constant
ConstantConstant
Voltage
Voltage
± AIR CONDITIONING SYSTEMAmplifiersAC±45

Condenser Fan Control Amplifier
INSPECT AMPLIFIER CIRCUIT
Disconnect the amplifier and inspect the connector on the
wire harness side as shown in the chart below. If the circuit is as specified, replace the amplifier.
If circuit is as specified, replace the amplifier. 2VZ±FE Engine Model
Approx. 1.5 k
at 27°C (77°F)
Turn ignition switch off.
Turn ignition switch off. Turn ignition switch on±. Turn ignition switch on. Turn ignition switch off.Turn ignition switch on. Turn ignition switch off. Turn ignition switch on.
Turn A/C switch on.
Turn A/C switch on.
Turn A/C switch off. Turn A/C switch off.
Tester
connection
Approx. 10 to 14 V Tester
connection
Specified valueSpecified value
Battery voltageBattery voltageBattery voltage Battery voltage
Battery voltage
Approx. 250
Battery voltage
Start engine.
Stop engine.
No voltageNo voltage
No voltage
No voltage
No voltage ContinuityNo voltageNo voltage
ContinuityContinuity
Continuity Continuity
Continuity
Condition
Continuity ResistanceCondition
Check forCheck for
Constant Constant Constant
Constant Constant
Constant Constant
VoltageVoltage
± AIR CONDITIONING SYSTEMAmplifiersAC±46

Compressor Control Amplifier
INSPECT AMPLIFIER CIRCUIT
Disconnect the amplifier and inspect the connector on the
wire harness side as shown in the chart below.
VACUUM HOSE CIRCUIT (3S±FE Engine)
Approx. 4.4 k
25°C(77°F) Turn ignition switch on.
Turn ignition switch off.
Tester
connectionSpecified value
3 ± GroundBattery voltage 6 ± Ground
No voltage ContinuityContinuity
Resistance
Condition
Check for
Constant Constant
Voltage
5±7
± AIR CONDITIONING SYSTEMAmplifiersAC±47

Compressor Control Amplifier
INSPECT AMPLIFIER CIRCUIT
Disconnect the amplifier and inspect the connector on the
wire harness side as shown in the chart below.
VACUUM HOSE CIRCUIT (3S±FE Engine)
Approx. 4.4 k
25°C (77°F) Turn ignition switch on.
Turn ignition switch off.
Tester
connectionSpecified value
3 ± GroundBattery voltage 6 ± Ground
No voltage ContinuityContinuity
Resistance
Condition
Check for
Constant Constant
Voltage
5±7
± AIR CONDITIONING SYSTEMVacuum Hose CircuitAC±47

Diagnosis System (A140E)
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 (No.
1 or 2) or solenoids (No. 1 or 2), the overdrive OFF
light will blink to. warn the driver. .
However, there will be no warning of a malfunction with
lock±up solenoid.
(b) 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±17)
tc) The throttle position sensor or brake signal are not indi-
cated, but inspection can be made by checking the voltage at
terminal Tt of the check connector (diagnosis).
(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
CPU 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) or
disconnect the ECT computer connector to cancel out the diag-
nostic (malfunction)
code. (See page AT±18)
HINT:
wLow battery voltage will cause faulty operation of the diag-
nosis system. Therefore, always check the battery first.
w Use a voltmeter and ohmmeter that have an impedance
of at least 10 k 11 IV.
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 is
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) (A140E)AT±16

wIn the event of a malfunction, the fight will blink once every
0.5 seconds. The number of blinks will equal the first num-
ber 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 seconds 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 ECT TERMINAL CIRCUIT OF CHECK
CONNECTOR
Using a SST, short terminals Tt and E1 of the check
connector.
SST 09843±18020
(Diagnostic Code Indication)
wIf the system is operating normally, the light will
blink once every 0.25 seconds. 3. READ DIAGNOSTIC CODE
Read the diagnostic code as indicated by the number
of times the O/D OFF indicator flashes.
± AUTOMATIC TRANSAXLETroubleshooting (Diagnosis System) (A140E)AT±17

Preliminary Check
11. CHECK FLUID LEVEL
HINT: The vehicle must have been driven so that the
engine and transmission are at normal operating tem-
perature. (fluid temperature: 158 ± 176
°F or 70 ±80°C)
(a) Park the vehicle on a level surface, set the parking
brake.
(b) With the engine idling, shift the shift lever into all posi-
tions from P to L position and return to P position.
HINT: Depress the brake pedal.
(a) Pull out the transaxle dipstick and wipe it clean.
(b) Push it back fully into the tube.
(c) Pull it out and check that the fluid level is in the HOT
range. If the level is at the low side of the hot range,
add fluid.
Fluid type: ATF DEXRON) II
NOTICE: Do not overfill.
2. CHECK FLUID CONDITION
If the fluid smells burnt or is black, replace it
3. REPLACE ATF
NOTICE: Do not overfill.
(a) Remove the drain plug and drain the fluid.
(b) Reinstall the drain plug securely.
(c) With the engine OFF, and new fluid through the dip
stick tube.
SST 09043±38100
Fluid: ATF DEXRON) II
Capacity:
Dry fill:
A140E 5.3 liters (5.6 US qts, 4.7 Imp. qts)
A140L 5.7 liters (6.0 U S qts, 5.0 Imp. qts)
Drain and refill (Reference):
140E, A140L 2.5 liters (2.6 US qts, 2.2 Imp. qts)
(d) Start the engine and shift the selector into all positions
from P through L and then shift into P.
(e) With the engine idling, check the fluid level. Add fluid
up to the ºCOOLº level on the dipstick.
(f) Check the fluid level with the normal fluid temperature
(158 ± 176
°F or 70 ± 80°C) and add as necessary.
NOTICE: Do not overfill.
± AUTOMATIC TRANSAXLETroubleshooting (Preliminary Check) (A140L and A140E)AT±21

5. INSPECT AND ADJUST SHIFT CABLE
When shifting the shift lever from the N position to oth-
er 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
vehicle.
(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.
6. 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
selector 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.±Ib, 5.4 N±m)
7. INSPECT IDLE SPEED (N RANGE)
Idle speed: 700 rpm 4. 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 accelerator
link.
(b) Fully depress the accelerator pedal.
(c) Loosen the adjustment nuts.
(d) Adjust the outer cable so that the distance between the end
of the boot and stopper on the cable is the standard.
Standard boot and cable stopper distance:
0± 1 mm 10±0.04 in.)
(e) Tighten the adjusting nuts.
(f ) Recheck the adjustments.
± AUTOMATIC TRANSAXLETroubleshooting (Preliminary Check) (A144L and A140E)AT±22

Manual Shifting Test (A140E)
HINT: With this test, it can be determined whether the
trouble lies within the electrical circuit or is a mechani-
cal problem in the transaxle.
1. DISCONNECT ECT ECU CONNECTOR
(a) Remove the glove box.
(b) With the engine OFF, disconnect the ECT connector.
HINT: If the L, 2 and D range gear positions are difficult
to distinguish, perform the following road test.
wWhite driving, shift through the L, 2 and D ranges.
Check that the gear change corresponds to the shift
position.
3. CONNECT ECT ECU CONNECTOR2. INSPECT MANUAL DRIVING OPERATION
Check that the shift and gear positions correspond with
the table below.
Gear position
Shift positionP
' range R
range 2
range V
rangeL
range
Pawl
Lock Reverse
O/D 1st
3rd
± AUTOMATIC TRANSAXLETroubleshooting (Manual Shifting Test) (A140E)AT±23

Disconnect ECT ECU connector and road test.
Does the transaxle operate i n the respective gear
when in the following ranges while driving?
D range . . Overdrive
2 range . . 3 rd gear
L range . . . 1 st gear
TROUBLESHOOTING FLOW±CHART
Trouble No.1 No Shifting
Connect a voltmeter to the check connector termi-
nals Tt and E1.
Does ECT terminal voltage vary with changes in
throttle opening?
Is voltage between ECT ECU terminals
BK and GND as follows?
0V: Brake pedal released
10 ± 14 V: Brake pedal depressed Warm up engine
Coolant temp.: 17f6°F (80°C)
ATF temp.: 122 ± 176°F (50 ± 80°C)
wECU power source and ground faulty
wThrottle position signal faulty
wECT terminal wire open or short
Ye s
Continued on page AT±27Brake signal
faulty
Transaxle faulty Ye s
Ye s
± AUTOMATIC TRANSAXLETroubleshooting (Electronic Control System) (A±1 40E)AT±26