Page 369 of 4770
wManifold absolute pressure sensor
wThrottle position sensor Manifold absolute pressure sensor
wDefogger relay
wTaillight relay Engine coolant temp. sensorData link connector 1 and 2
Data link connector 1 and 2Malfunction indicator lamp Injectors (No.2 and No.4)
No.1 vehicle speed sensorThrottle position sensor
Throttle position sensorIntake air temp. sensorEG R gas temp. sensor
Circuit opening relay
Main oxygen sensor
Data link connector 1Sub oxygen sensor Terminal
No.Terminal
No.
A/C amplifier
EFI main relayEFI main relay Sensor ground
Sensor groundA/C amplifier
Power ground
ECM groundConnection Connection
VSV for EG R
Knock sensorSymbol Symbol
Battery Igniter
± 5S±FE ENGINETERMINALS OF ECMEG1±319
Page 370 of 4770
ECM (California specification vehicles and except California specification vehicles with A/T)
*: Only for California specification vehicles.
*: Except California specification vehicles with A/T.wManifold absolute pressure sensor
wThrottle position sensor
TERMINAL OF ECM (Cont'd)
Manifold absolute pressure sensor VSV for fuel pressure control
Engine coolant temp. sensor No.2 and No.4 injectors
No.1 and No.3 injectors
Intake air temp. sensor VSV for A/C Idle up
Main oxygen sensor Sub oxygen sensor A/T No.1 solenoid
A/T No,2 solenoid Terminal
No.*
A/T SL solenoid
Power ground
Power ground No.2 injector
No.1 injectorNo.4 injector
No.3 injector
ECM groundVSV for EG RConnection Connection
DistributorDistributor
Distributor Distributor
IAC valve IAC valveSymbol Symbol
Igniter IgniterTerminal
No.*
± 5S±FE ENGINETERMINALS OF ECMEG1±320
Page 371 of 4770
*: Only for California specification vehicles.
*: Except California specification vehicles with A/T.wStoplight switch
w Stoplight
w Park/neutral position switch wDefogger relay
wTaillight relay
Park/neutral position switchPark/neutral position switch
Park/neutral position switch
Malfunction indicator lampData link connector 1 and 2 Data link connector 1 and 2No.1 vehicle speed sensor
Throttle position sensor
Throttle position sensorEGR gas temp. sensor
Circuit opening relay Data link connector 1Data link connector 2
Cruise control ECUO/D main switch Terminal
No.Terminal
No.Connection
A/C amplifier
EFI main relay Sensor ground
Sensor ground
A/C amplifierEFI main relay
Knock sensorStarter relay Connection Symbol
Symbol
Battery
± 5S±FE ENGINETERMINALS OF ECMEG1±321
Page 372 of 4770
IG switch ON and apply vacuum to the
throttle opener. Throttle valve fully closed. ECM (Except California specification vehicles with M/T)
STANDARD VALUE OF EC
Idling, Engine coolant temp, 80C (176F) IG switch 0 N
Throttle valve fully closed
IG switch ON
Throttle valve fully openIG switch ON
Throttle valve fully open
Idling, Intake air temp. 20C (68F)
Pulse generation
(See page EG1±347)
Pulse generation
(See page EG1±336)
Pulse generation
(See page EG1±336) Pulse generation
(See page EG1±347)
TERMINALS
Symbols (Terminals No.)
STD Voltage (V)
Pulse generation Wiring Color
IG switch ON IG switch ON
IG switch ONIG switch ON
IG switch ONCondition
Below 2.0Always
Idling IdlingIdling
IdlingIdlingIdling
± 5S±FE ENGINESTANDARD VALUE OF ECM TERMINALSEG1±322
Page 373 of 4770
Maintain engine speed at 2,500 rpm for
2 minutes after warming up then return to
idling
Maintain engine speed at 2,500 rpm for
2 minutes after warming up
IG switch ON
Rotate driving wheel slowly Pulse generation
(See page EG1±355)
Pulse generation
(See page EG1±389)
Pulse generation
(See page EG1±380) Symbols (Terminals No.)
A/C switch ON (at idling)
Idling, A/C switch OFF Idling, A/C switch ON STD Voltage (V)
A/C switch OFF Wiring Color
IG switch ONIG switch ONIG switch ON
IG switch ONlG switch ONCondition
Idling
Idling
± 5S±FE ENGINESTANDARD VALUE OF ECM TERMINALSEG1±323
Page 374 of 4770

ECM (California specification vehicles and except California specification vehicles with A/T)
STANDARD VALUE OF ECM TERMINALS (Cont'd)
*: Only for California specification vehicles.
*: Except California specification vehicles with A/T.IG switch ON and apply vacuum to the
throttle opener. Throttle valve fully closed.
Idling, Engine coolant temp. 80C (176F) IG switch ON
Throttle valve fully closedIG switch ON
Throttle valve fully open
IG switch ON
Throttle valve fully open
Idling, Intake air temp. 20C (68F)
Pulse generation
(See page EG1±410)
Pulse generation
(See page EG1±341)
Pulse generation
(See page EG1±336) Pulse generation
(See page EG1±341) Pulse generation
(See page EG1±347) Pulse generation
(See page EG1±347)
Pulse generation
(See page EG1±336) Symbols (Terminals No.)*3
STD Voltage (V) Wiring Color
IG switch ON IG switch ONIG switch ON
IG switch ONlG switch ONCondition
Below 2.0Always
Idling Idling
Idling Idling
Idling Idling
Idling
Idling
± 5S±FE ENGINESTANDARD VALUE OF ECM TERMINALSEG1±324
Page 375 of 4770
Maintain engine speed at 2,500 rpm for
2 minutes after warming up then return
to idling
*: Only for California specification vehicles.Maintain engine speed at 2,500 rpm for
2 minutes after warming up
IG switch ON
Other shift position in ªPº, ªNº position
IG switch ON
Shift position in ªPº, ªNº position
IG switch ON
0/D main switch pushed out
Restarting at high engine coolant temp.
IG switch ON
O/D main switch pushed inIG switch ON
Rotate driving wheel slowly Pulse generation
(See page EG1±389)
Pulse generation
(See page EG1±380) Pulse generation
(See page EG1±355) Symbols (Terminals No.)*
A/C switch ON (At idling)
Idling, A/C switch OFFIdling, A/C switch ON STD Voltage (V)
A/C switch OFF Wiring Color
IG switch ON IG switch ONIG switch O NIG switch ON
IG switch ON
IG switch ONIG switch ONCondition
IdlingIdling
*:
± 5S±FE ENGINESTANDARD VALUE OF ECM TERMINALSEG1±325
Page 376 of 4770

REFERENCE VALUE OF ECM DATA
*1: If the engine coolant temp, sensor circuit is open or shorted, the ECM assumes an engine coolant temp, value of 80C (176F).
*2: When feedback control is forbidden, 0 V is displayed,
*3: A/T only.Closed throttle position
Wide open throttle
From closed throttle position to wide open throttle
When shifting from ªPº or ªNº position into a position
other than ªPº or ªNºEngine idling at normal operating temp.
increase engine loadEngine cold to hot
Engine idling at normal operating temp.
RPM stable at 2,500 rpm with normal operating temp.
PRM stable at 2,500 rpm with normal operating temp.RPM kept stable (Comparison with tachometer)
During driving (Comparison with speedometer)Below 5
Above 70
Gradually increases Approx. 180 ~ 280 mm Hg
Gradually increases
Engine idling at normal operating temp.Engine idling at normal operating temp.Gradually decreases
Approx. 2 ~ 5 msecs
REFERENCE VALUE
Engine at normal operating temp. 75 ± 95C (185 ± 203F) *1
Closed throttle position
RICH LEAN is repeated Increase engine speed
No large differences Inspection condition
Gradually increases
No great changes
2.50+ 1.25 V *2
During cranking
PNP SIGNAL *3A/C switch ON ENGINE SPEEDReference value
TARGET A/F LVEHICLE SPD
A/F FB LEFT
A/C SIGNALSTA SIGNAL
CTP SIGNAL30~60% INJECTOR
THROTTLEIAC DUTYIGNITION
G EAR MAPItem
OxLECT
HINT: ECM data can be monitored by TOYOTA hand±held
tester.
1. Hook up the TOYOTA hand±held tester to the DLC2.
2. Monitor ECM data by following the prompts on the tester
screen.
Please refer to the TOYOTA hand±held tester operator's
manual for further details.
± 5S±FE ENGINEREFERENCE VALUE OF ECM DATAEG1±326