1995 TOYOTA SUPRA Service Repair Manual

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Page 2017 of 2543

TOYOTA SUPRA 1995 Service Repair Manual STANDARD VALUE OF ECM TERMINALS
Connectors of the engine control module are waterproof and are
the bolt type.
For waterproof type connectors, in order to measure the voltage
of ECM terminals and the

Page 2018 of 2543

TOYOTA SUPRA 1995 Service Repair Manual STANDARD VALUE OF ECM TERMINALS
Always
IG switch ON
IG switch ON
IG switch ON and apply vacuum to the
throttle opener Throttle valve fully closed
IG switch ON
Main or sub±throttle valve fully closed

Page 2019 of 2543

TOYOTA SUPRA 1995 Service Repair Manual Symbols (Terminals No.) STD Voltage (V) Condition
EGR (B75) E01 (B80) Below 2.

Symbols (Terminals No.) STD Voltage (V) Condition
EGR (B75) E01 (B80) Below 2.0 Idling
EGR (B75)±E01 (B80) 9 ~ 14 Engine speed at 3,500 rpm
VG (B66)±E21 (B28) 0.7 ~ 1.7 Idling

ISC1 (B35), ISC2 (B34)
Ð E01 (B80)
ISC3 (B33), ISC4 (B32)

Pulse generation
(See page EG±586)
Idling when A/C switch ON or OFF

VF1 (B29)±E1 (B69)

1.8 ~ 3.2

Maintain engine speed at 2,500 rpm for 2
minutes after warming up then return to Idling

OX1 (B48), OX2 (B47)±E1 (B69)

Pulse generation
(See page EG±529)

Maintain engine speed at 2,500 rpm for 2
minutes after warming up

HT1 (B71) HT2 (B72) E01 (B80)
Below 3.0 Idling HT1 (B71), HT2 (B72)±E01 (B80) 9 ~ 14 IG switch ON
KNK1 (B50), KNK2 (B49)±E1 (B69)

Pulse generation
(See page EG±563)
Idling

NSW (B76) E1 (B69)

9 ~ 14

IG switch ON
Other shift position in ºPº, ºNº position

NSW (B76)±E1 (B69)
0 ~ 3.0

IG switch ON
Shift position in ºPº, ºNº position

SP1 (A2)±E1 (B69)

Pulse generation
(See page EG±556)

IG switch ON
Rotate driving wheel slowly
TE1 (A20)±E1 (B69) 9 ~ 14 IG switch ON
TE2 (A19)±E1 (B69) 9 ~ 14 IG switch ON
W (A6)±E1 (B69) 9 ~ 14 Idling
0 ~ 3.0 IG switch ON
OD1 (A12)±E1 (B69) 9 ~ 14 IG switch ON
A/C (A34)±E1 (B69) 7.5 ~14 A/C switch OFF
0 ~ 1.5 A/C switch ON (At idling)
ACMG (A23)±E1 (B69) 0 ~ 3.0 A/C switch ON (At idling)
9 ~ 14 A/C switch OFF
FPU (B73)±E01 (B80) 9 ~ 14 IG switch ON
Below 2.0 Restarting at high engine coolant temp.
ELS (A15)±E1 (B69) 7.5 ~ 14 Defogger switch and taillight switch ON
0 ~ 1.5 Defogger's switch and taillight switch OFF
VSV1 (B40)±E1 (B69) Below 3.0 Immediately after racing
9 ~ 14 Idling
VSV2 (B39)±E1 (B69) Below 3.0 For 2 sec. after IG switch ON to OFF
9 ~ 14 Idling
VSV3 (B38)±E1 (B69) 9 ~ 14 Idling

PMC (B60)±E1 (B69)

Below 3.0

Idling (for M/T)
Idling and shift position ºPº, ºNº position
(for AT)

PMC (B60)±E1 (B69)

9 ~ 14

Idling and other shift position ºPº, ºNº
position (for A/T))

PM1 (B62)±E2 (A65)

2.3 ~ 3.0

IG switch ON

1.8 ~ 2.4

IG switch ON and apply vacuum 26.7 kPa
(200 mmHg, 7.9 in Hg)
EG±512± ENGINE2JZ±GTE ENGINE TROUBLESHOOTING

Page 2020 of 2543

TOYOTA SUPRA 1995 Service Repair Manual REFERENCE VALUE OF ECM DATA
HINT: ECM data can be monitored by TOYOTA hand±held
tester.
1. Hook up the TOYOTA hand±held tester to DLC2.
2. Monitor ECM data by following the prompts on the tester
s

REFERENCE VALUE OF ECM DATA
HINT: ECM data can be monitored by TOYOTA hand±held
tester.
1. Hook up the TOYOTA hand±held tester to 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.
REFERENCE VALUE
Item

Inspection condition

Reference value

INJECTOR

Engine cold to hot
Engine idling at normal operating temp.*1

Gradually decreases
Approx. 1.8 msec.
IGNITION Increase engine speed Gradually increases

IAC STEP #

Engine idling at normal operating temp..*1
A/C switch ON
A/T shifting in ºDº position
Ignition switch ON (Engine off)

20 ~ 30 steps
Step increases
Step increases
Approx. 125 steps`
ENGINE SPEED RPM kept stable (Comparison with tachometer) No great changes

MAF

Engine idling at normal operating temp..*1
Increase engine speed

Approx. 3.8 g/s
Gradually increases
ECT Engine at normal operating temp. 75±95°C (185±203°F).*2

THROTTLE

Closed throttle position
Wide open throttle
From closed throttle position to wide open throttle

Below 5°
Above 70°
Gradually increases

VEHICLE SPD

During driving
(Comparison with speedometer)

No large differences
TARGET A/FL Engine idling at normal operating temp. 2.50 + 1.25 V*3
A/F FB LEFT RPM stable at 2,500 rpm with normal operating temp. ON
KNOCK FB Depress throttle pedal suddenly during idling ON
STA SIGNAL
During cranking
ON
CTP SIGNAL Closed throttle position ON
A/C SIGNAL A/C switch ON ON

PNP SIGNAL.*4

When shifting from ºPº or ºNº position into a position
other than ºPº or ºNº
GEAR
OxL RPM stable at 2,500 rpm with normal operating temp. RICH LEAN is repeated
*1: All accessories and A/C switched OFF
*
2: If the engine coolant temp. sensor circuit is open or shorted, the ECM assumes an engine coolant temp.
value of 80°C (176°F).
*
3: When feedback control is forbidden, 0 V is displayed.
*
4: A/T only
± ENGINE2JZ±GTE ENGINE TROUBLESHOOTINGEG±513

Page 2021 of 2543

TOYOTA SUPRA 1995 Service Repair Manual Suspect area
See page
Symptom
Engine does not crank
No initial combustion
No complete combustion
Engine cranks normally
Cold engine
Hot engine
Incorrect first idle
High engine idle speed

Page 2022 of 2543

TOYOTA SUPRA 1995 Service Repair Manual CIRCUIT DESCRIPTION
Camshaft position sensors (G1 and G2 signals) are mounted on the intake side of the cylinder head
and the crankshaft position sensor (NE signal) is mounted on the oil pump body. Th

Page 2023 of 2543

TOYOTA SUPRA 1995 Service Repair Manual INSPECTION PROCEDURE
(See page IG±30).
Check crankshaft position sensor, camshaft position sensors No.1, No.2.
For crankshaft position sensor, remove crankshaft posi-
tion sensor (See page IG±30).
F

Page 2024 of 2543

TOYOTA SUPRA 1995 Service Repair Manual Check for open and short in harness and connector between engine control
module and each sensor (See page IN±30).
During cranking or idling, check waveforms between
terminals G1, G2 and G1 , G2 ,

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