1986 TOYOTA CAMRY V20 condition

Voltage at ECU Wiring Connectors (2VZ±FE)
No trouble (ºCHECKº engine warning light off) and engine running
Stop light SW ON (Brake pedal depressed)Check connector TE1 ± E1 not connected
Check connector TE1 ± E1 connected
Ex. shift position P or N range Measuring plate fully closed
Intake air temp. 20°C (68°F)
Coolant temp. 80°C (176°F) Measuring plate fully open
Shift position P or N range Throttle valve fully closed
Heater blower SW ON Air conditioning ON Throttle valve open Throttle valve open
Cranking or idlingSm voltage (V)
3,000 rpm IG SW ON
IG SW ON
IG SW ON
IG SW ON
IG SW ON 1G SW ON Terminals
Cranking Idling
± EFI SYSTEMElectronic Control System (Electronic Controlled Unit(ECU))
FI±134

2. INSPECT RESISTANCE OF ECU
NOTICE:
wDo not touch the ECU terminals.
wThe tester probe should be inserted into the wiring
connector from the wiring side.
Check the resistance between each terminal of the wiring
connectors.
wDisconnect the connectors from the ECU.
wMeasure the resistance at each terminal.
Resistance of ECU Wiring Connectors (3S±FE)
Measuring plate fully closed
Intake air temp. 20
°C (68°F)
Coolant temp. 80°C (176°F)
Measuring plate fully openThrottle valve fully closed
Throttle valve fully closedThrottle valve fully closed
Throttle valve fully closedThrottle valve fully open
Throttle valve fully openThrottle valve open
STD resistance ()
Throttle valve open
Condition Terminals
± EFI SYSTEMElectronic Control System (Electronic Controlled Unit
(ECU))FI±135

Resistance of ECU Wiring Connectors (2VZ±FE)
Coolant temp. 80°C (176°F)
Measuring plate fully closed
Intake air temp. 20°C (68°F)
Measuring plate fully open
Throttle valve fully closed
Throttle valve fully closed Throttle valve fully openSTD resistance (


Throttle valve open TerminalsCondition
± EFI SYSTEMElectronic Control System (Electronic Controlled Unit(ECU))
FI±136

Reduced blow±by gas (HC)
Reduced evaporative HC
Reduces NOx
Reduces HC
1 CO and NOx
Regulates all engine conditions for reduction of
exhaust emissions.
Remarks *For inspection and repair of the EFI system, refer to the EFI section of this manual.Positive crankcase ventilation
Fuel evaporative emission control
Exhaust gas recirculation
Three±way catalyst
Electronic fuel injection*
SYSTEM PURPOSE
PCV
EVAP
EGR
TWC
EFI Abbreviation
Purpose System
± EMISSION CONTROL SYSTEMS (3S±FE)System PurposeEC±2

Reduces blow±by gas (HC)
Reduces evaporative HC
Reduces HC and CO
Reduces NOx
Reduces HC, CO and NOx
Regulates all engine conditions for reduction of
exhaust emissions. Positive Crankcase ventilation
Fuel evaporative emission control
Dash pot
Exhaust gas recirculation
Three±way catalyst
Electronic fuel injection*
Remarks *For inspection and repair of the EFI system, refer to EFI section of this
manual.
SYSTEM PURPOSE
PCV
EVAP
DP
EGR
TWC
EFI Abbreviation
Purpose
System
± EMISSION CONTROL SYSTEMS (2VZ±FE)System PurposeEC±13

To reduce NC and CO emissions, when decelerating the dash pot opens the throttle valve slightly more than at idle.
This causes the air±fuel mixture to bum completely.
DASH POT (DP) SYSTEM
(MT only)
Slightly opens and then slowly closes to idle
position Pushed in by return force of throttle valve
Pushed in by return force of throttle valvePushed out by diaphragm springHigh speed position Idle speed positionThrottle Valve
Normal driving
DecelerationDiaphragm
Condition
CLOSED
CLOSED Idling
OPENVTV
± EMISSION CONTROL SYSTEMS (2VZ±FE)Dash Pot (DP) System (MT only)EC±19

ADJUSTMENT OF IGNITION TIMING
3S±FE (See steps 7 to 10 on pages IG±16 and 17)
2VZ±FE (See steps 6 to 11 on pages IG±20 and 21)
Ignition timing:
10°BTDC @ idle
(w/ Terminals TE1 and E1 connected)
ADJUSTMENT OF IDLE SPEED (3S±FE)
(See HINT on page FI±17)
1. INITIAL CONDITIONS
(a) Engine at normal operating temperature
(b) Air cleaner installed
(c) All pipes and hoses of air induction system connected
(d) All vacuum lines connected
HINT: All vacuum hoses for EGR systems, etc. should be
properly connected.
(e) EFI system wiring connectors fully plugged
(f) All accessories switched OFF
(g) Transmission in N range
2. CONNECT TACHOMETER (See page IG±16)
3. ADJUST IDLE SPEED
(a) Using SST, connect terminals TE1 and E1 of the check
connector.
SST 09845±18020
HINT: Decrease the rpm after the engine maintains a speed
of the 1,000 ± 1,300 rpm for 5 seconds.
(d) Remove SST.
4. FURTHER CHECK IDLE SPEED
Idle speed: 700
+ 5O rpm
If the idle speed is not within these values, carry out either of
the below listed procedures and then recheck the idle speed.
Carry out a driving test, including stop±go several times at a
speed above 10 km/h, or± start the engine, idle for
30 seconds and then turn the engine 'off repeatedly. By
doing this, idle data will be stored in the ISC and the idle rpm
will be at specified value.(b) Check the idle speed.
Idle speed: 660 rpm or more
(c) If the idle speed is not as specified, adjust the idle speed
by turning the IDLE SPEED ADJUSTING
SCREW.
± ENGINE MECHANICALEngine Tune±UpEM±19

IDLE AND OR 2,500 RPM HC CO
CONCENTRATION CHECK
METHOD
HINT: This check is used only to determine whether or not
the idle HC/CO complies with regulations.
1. INITIAL CONDITIONS
(b) Engine at normal operating temperature
(b) Air cleaner installed
(e) All pipes and hoses of air induction system connected
(d) All operating accessories switched OFF
(e) All vacuum lines properly connected
HINT: All vacuum hoses for EGR systems, etc. should be
properly connected.
(f) EFI system wiring connectors fully plugged
(g) Ignition timing set correctly
(h) Transmission in N range
(i) Tachometer and HC/CO meter calibrated and at hand
2. START ENGINE
3. RACE ENGINE AT 2,500 RPM FOR APPROX. 2
MINUTES
4. INSERT HC/CO METER TESTING PROBE INTO
TAILPIPE AT LEAST 40 cm (1.3 ft)
5. CHECK HC/CO CONCENTRATION AT IDLE
Complete the measuring within three times.
HINT: When performing the 2 mode (2,500 rpm and idle)
test, follow the measurement order prescribed by the regula-
tions.
If the HC/CO concentration at 2,500 rpm does not comply
with regulations, try the following procedure.
Race the engine again at 2,500 rpm for approx. 1 minute
and quickly repeat steps 4 and 5 above.
This may correct the problem.
± ENGINE MECHANICALIdle and or 2 500 rpm HC CO Concentration Check MethodEM±20