TOYOTA SUPRA 1997 Service Repair Manual

DI-156
- DIAGNOSTICSENGINE (2JZ-GTE)
384 Author
: Date
:
1997 SUPRA (RM502U)
7. ENGINE OPERATING CONDITION
NOTICE:
The values given below for ºNormal Conditionº are representative values, so a vehicle may still be
normal even if its value varies from those listed here. So do not decide whether a part is faulty or not
solely according to the ºNormal Conditionº here.
(a) CARB Mandated Signals
TOYOTA hand-held
tester displayMeasurement ItemNormal Condition*
FUEL SYS #1
Fuel System Bank 1
OPEN: Air-fuel ratio feedback stopped
CLOSED: Air-fuel ratio feedback operatingIdling after warmed up:
CLOSED
CALC LOADCalculator Load:
Current intake air volume as a proportion of max. intake air volumeIdling: 6.7 - 11.0 %
Racing without load
(2,500 rpm): 7.0 - 11.3 %
COOLANT TEMPEngine Coolant Temperature Sensor ValueAfter warmed up:
80 - 95°C (176 - 203°F)
SHORT FT #1Short - term Fuel Trim Bank 10 ± 20 %
LONG FT #1Long - term Fuel Trim Bank 10 ± 20 %
ENGINE SPDEngine SpeedIdling: 650 ± 50 rpm
VEHICLE SPDVehicle SpeedVehicle stopped:
0 km/h (0 mph)
IGN ADVANCEIgnition Advance
Ignition Timing of Cylinder No.1Idling: BTDC 10 ~ 20°
INTAKE AIRIntake Air Temperature Sensor ValveEquivalent to Ambient Temp.
MAFAir Flow Rate Through Mass Air Flow Meter
Idling: 2.9 - 4.8 gm/sec
Racing without load
(2,500 rpm):
11.7 - 18.8 gm/sec
THROTTLE POSVoltage Output of Throttle Position Sensor Calculated as a Percentage
0 V " 0 %, 5 V " 100 %Throttle
Fully Closed: 7 - 11 %
Fully Open: 65 - 75 %
O2S B1, S1Voltage Output of Oxygen Sensor Bank1, Sensor 1Idling: 0.1 - 0.9 V
O2FT B1, S1Oxygen Sensor Fuel Trim Bank1, Sensor 1
(Same as SHORT FT #1)0 ± 20 %
02S, B1, S2Voltage Output of Oxygen Sensor Bank 1, Sensor 2Driving 50 km/h (31 mph):
0.1 - 0.9 V
*: If no conditions are specifically stated for ºidlingº, it means the shift lever is at N or P position, the A/C switch
is OFF and all accessory switches are OFF.

- DIAGNOSTICSENGINE (2JZ-GTE)
DI-157
385 Author
: Date
:
1997 SUPRA (RM502U)
(b) TOYOTA Enhanced Signals
TOYOTA hand-held
tester displayMeasurement ItemNormal Condition*
MISFIRE RPMEngine RPM for first misfire rangeMisfire 0: 0 rpm
MISFIRE LOADEngine load for first misfire rangeMisfire 0: 0 g/r
INJECTORFuel injection time for cylinder No.1Idling: 1.3 ~ 2.7 ms
IAC STEP POSIntake Air Control Valve Step Position Opening position step motor type IAC valveIdling: 10 ~ 50 step
STARTER SIGStarter SignalCranking: ON
CTP SWClosed Throttle Position Switch SignalThrottle fully closed: ON
A/C SIGA/C Switch SignalA/C ON: ON
PNP SWPark / Neutral Position Switch SignalP or N position: ON
ELECTRICAL LOAD SIGElectrical Load SignalDefogger S/W ON: ON
STOP LIGHT SWStop Light Switch SignalStop light switch ON: ON
FC IDLFuel Cut Idle: Fuel cut when throttle valve fully closed, during decelerationFuel cut operating: ON
FC TAUFuel Cut TAU: Fuel cut after between 20 sec. at light loadFuel cut operating: ON
CYL #1
CYL #2
CYL #3
CYL #4
CYL #5
CYL #6
Abnormal revolution variation for each cylinder0%
IGNITIONTotal number of ignitions for every 1,000 revolutions0 ~ 3,0000
EGRT GASEGR Gas Temperature Sensor Value
EGR not operating:
Temperature between intake
air temp. and engine coolant
temp.
FUEL PRES UP VSVFuel Pressure Up VSV SignalHigh temp. restarting: ON
EGR SYSTEMEGR system operating conditionIdling: OFF
FUEL PUMPFuel Pump SignalIdling: ON
A/C MAG CLUTCHA/C Magnetic Clutch SignalA/C ON: ON
EVAP (PURGE) VSVEVAP VSV SignalVSV operating: ON
TURBO BOOST VSVWaste gate valve VSV signalVSV operating: ON
INTK AIR CTL VSVIntake Air Control Valve VSV SignalVSV operating: OFF
EXH GAS CTL VSVExhaust Gas Control Valve VSV SignalVSV operating: OFF
EXH BYPASS VSVExhaust Bypass Valve VSV SignalVSV operating: OFF
TOTAL FT B1Total Fuel Trim Bank 1: Average value for fuel trim system of bank 1Idling: 0.8 ~ 1.2
TOTAL FT B2Total Fuel Trim Bank 2: Average value for fuel trim system of bank 2Idling: 0.8 ~ 1.2
02 LR B1, S1Oxygen Sensor Lean Rich Bank 1, Sensor 1 Response time for oxygen sensor
output to switch from lean to rich.Idling after warmed up:
0 ~ 1,000 m sec.
02 RL B1, S1Oxygen Sensor Rich Lean Bank 1, Sensor 1 Response time for oxygen sensor
output to switch from rich to lean.Idling after warmed up:
0 ~ 1,000 m sec.
*: If no conditions are specifically stated for ºIdlingº, it meas the shift lever is at N or P position, the A/C switch
is OFF and all accessory switches are OFF.

DI4SI-01
DI-158
- DIAGNOSTICSENGINE (2JZ-GTE)
386 Author
: Date
:
1997 SUPRA (RM502U)
DIAGNOSTIC TROUBLE CODE CHART
HINT:
Parameters listed in the chart may not be exactly the same as your reading due to the type of instrument
or other factors.
If a malfunction code is displayed during the DTC check in check mode, check the circuit for that code listed
in the table below. For details of each code, turn to the page reffered to under the ºSee pageº for the respec-
tive ºDTC No.º in the DTC chart.
DTC No.
(See Page)Detection ItemTrouble AreaMIL*Memory
P0100
(DI-170)Mass Air Flow Circuit
MalfunctionOpen or short in mass air flow meter circuit
Mass air flow meter
ECM

P0101
(DI-174)Mass Air Flow Circuit
Range / Performance ProblemMass air flow meter
P0110
(DI-175)Intake Air Temp. Circuit
MalfunctionOpen or short in intake air temp. sensor circuit
Intake air temp. sensor
ECM

P0115
(DI-179)Engine Coolant Temp. Circuit
MalfunctionOpen or short in engine coolant temp. sensor circuit
Engine coolant temp. sensor
ECM

P0116
(DI-183)Engine Coolant Temp. Circuit
Range / Performance ProblemEngine coolant temp. sensor
Cooling system
P0120
(DI-184)Throttle / Pedal Position
Sensor / Switch ºAº Circuit
MalfunctionOpen or short in throttle position sensor circuit
Throttle position sensor
ECM

P0121
(DI-189)Throttle /Pedal Position
Sensor / Switch ºAº Circuit
Range / Peformance Problem
Throttle position sensor
P0125
(DI-190)Insufficient Coolant Temp. for
Closed Loop Fuel ControlOpen or short in heated oxygen sensor circuit
Heated oxygen sensor
P130
(DI-193)Heated Oxygen Sendor Circuit
Malfunction
(Bank 1 Sensor 1)Heated oxygen sensor
Fuel trim malfunction
P0133
(DI-196)Heated Oxygen Sensor Circuit
Slow Response
(Bank 1 Sensor 1)
Heated oxygen sensor
*: ... MIL lights up

- DIAGNOSTICSENGINE (2JZ-GTE)
DI-159
387 Author
: Date
:
1997 SUPRA (RM502U)DTC No.
(See Page)
Detection ItemTrouble AreaMIL*Memory
P0135
(DI-197)Heated Oxygen Sensor Heater
Circuit Malfunction
(Bank 1 Sensor 1)Open or short in heater circuit of heated oxygen sensor
Heated oxygen sensor heater
ECM

P0136
(DI-199)Heated Oxygen Sensor Circuit
Malfunction
(Bank 1 Sensor 2)
Heated oxygen sensor
P0141
(DI-197)Heated Oxygen Sensor Heater
Circuit Malfunction
(Bank 1 Sensor 2)
Same as DTC No. P0135
P0171
(DI-201)System too Lean
(Fuel Trim)
Air Intake (hose loose)
Fuel line pressure
Injector blockage
Heated oxygen sensor malfunction
Mass air flow meter
Engine coolant temp. sensor

P0172
(DI-201)System too Rich
(Fuel Trim)
Fuel line pressure
Injector blockage, leak
Heated oxygen sensor malfunction
Mass air flow meter
Engine coolant temp. sensor

P0300
(DI-204)Random / Multiple Cylinder
Misfire DetectedIgnition system
In
jector
P0301
P0302
P0303
P0304
P0305
P0306
(DI-204)Misfire Detected
- Cylinder 1
- Cylinder 2
- Cylinder 3
- Cylinder 4
- Cylinder 5
- Cylinder 6
Injector
Fuel line pressure
EGR
Compression pressure
Valve clearance not to specification
Valve timing
Mass air flow meter
Engine coolant temp. sensor

P0325
(DI-209)Knock Sensor 1 Circuit
MalfunctionOpen or short in knock sensor 1 circuit
Knock sensor 1 (looseness)
ECM

P0330
(DI-209)Knock Sensor 2 Circuit
MalfunctionOpen or short in knock sensor 2 circuit
Knock sensor 2 (looseness)
ECM

P0335
(DI-212)Crankshaft Position
Sensor ºAº Circuit
Malfunction
Open or short in crankshaft position sensor circuit for NE sig-
nal
Crankshaft position sensor for NE signal
Starter
ECM

*: ... MIL lights up

DI-160
- DIAGNOSTICSENGINE (2JZ-GTE)
388 Author
: Date
:
1997 SUPRA (RM502U)DTC No.
(See Page)
Detection ItemTrouble AreaMIL*Memory
P0340
(DI-215)Camshaft Position Sensor
Circuit Malfunction
Open or short in camshaft position sensor circuit
Camshaft position sensor
Open or short in crankshaft position sensor circuit for NE2
signal
Crankshaft position sensor for NE2 signal
Starter
ECM

P0401
(DI-217)Exhaust Gas Recirculation Flow
Insufficient Detected
EGR valve stuck closed
Short in VSV circuit for EGR
Open in EGR gas temp. sensor circuit
EGR hose disconnected
ECM

P0402
(DI-227)Exhaust Gas Recirculation Flow
Excessive Detected
EGR valve stuck open
EGR VSV open malfunction
Open in VSV circuit for EGR
Short in EGR gas temp. sensor circuit
ECM

P0420
(DI-231)Catalyst System Efficiency
Below ThresholdThree-way catalytic converter
Open or short in heated oxygen sensor circuit
Heated oxygen sensor

P0441
(DI-234)Evaporative Emission Control
System Incorrect Purge Flow
Open or short in VSV circuit for EVAP
VSV for EVAP
ECM
Vacuum hose blocked or disconnected
Charcoal canister

P0500
(DI-238)Vehicle Speed Sensor
Malfunction
Open or short in vehicle speed sensor circuit
Vehicle speed sensor
Combination meter
ECM

P0505
(DI-240)Idle Control System Malfunction
IAC valve is stuck or closed
Open or short in IAC valve circuit
Open or short in A/C signal circuit
Air intake (hose loose)

P0510
(DI-243)Closed Throttle Position Switch
MalfunctionOpen in closed throttle position switch circuit
Closed throttle position switch
ECM

*: ... MIL lights up

- DIAGNOSTICSENGINE (2JZ-GTE)
DI-161
389 Author
: Date
:
1997 SUPRA (RM502U)
DTC CHART (Manufacture Controlled)
DTC No.
(See Page)Detection ItemTrouble AreaMIL*Memory
P1100
(DI-247)Barometric Pressure Sensor Cir-
cuit MAlfunctionECM
P1200
(DI-248)Fuel Pump Relay / ECU Circuit
Malfunction
Open or short in fuel pump ECU circuit
Fuel pump ECU
ECM power source circuit
Fuel pump
ECM
-
P1300
(DI-252)Igniter Circuit
MalfunctionOpen or short in IGF or IGT circuit from igniter to ECM
Igniter
ECM

P1335
(DI-257)Crankshaft Position Sensor
Circuit Malfunction (during
engine running)
Open or short in crankshaft position sensor circuit for NE sig-
nal
Crankshaft position sensor for NE signal
Starter
ECM
-
P1400
(DI-258)Sub Throttle Position Sensor
MalfunctionOpen or short in sub throttle position sensor circuit
Sub throttle position sensor
ECM

P1401
(DI-261)Sub Throttle Position Sensor
Range / Performance ProblemSub throttle position sensor
P1405
(DI-262)Turbo Pressure Sensor Circuit
MalfunctionOpen or short in turbo pressure sensor circuit
Turbo pressure sensor
ECM

P1406
(DI-265)Turbo Pressure Sensor Circuit
Range / Performance ProblemTurbo pressure sensor
P1511
(DI-266)Boost Pressure Low
Malfunction
Air intake (leakage or clogging)
Actuator (for waste gate valve, IACV control valve, exhaust
bypass valve and exhaust gas control valve)
Short in VSV for waste gate valve, IACV control valve, exhaust
bypass valve and exhaust gas control valve circuit
ECM

P1512
(DI-274)Boost Pressure High
Malfunction
Actuator (for waste gate valve and exhaust bypass valve)
Short in VSV for waste gate valve and exhaust bypass valve
circuit
ECM

P1520
(DI-279)Stop Light Switch Signal
MalfunctionShort in stop light switch signal circuit
Stop light switch
ECM

P1600
(DI-282)ECM BATT
MalfunctionOpen in back up power source circuit
ECM
*:
.... MIL dose not light up
 ... MIL lights up

DI-162
- DIAGNOSTICSENGINE (2JZ-GTE)
390 Author
: Date
:
1997 SUPRA (RM502U)DTC No.
(See Page)
Detection ItemTrouble AreaMIL*Memory
P1605
(DI-284)Knock Control CPU
MalfunctionECM
P1630
(DI-285)Traction Control System
Malfunction
Open or short in ETC+ or ETC- circuit
Open or short in EFI+ or EFI- circuit
Throttle control ECU
ECM
-
P1652
(DI-287)IACV Control CIrcuit
MalfunctionOpen or short in VSV circuit for IACV
VSV for IACV
ECM

P1658
(DI-291)Waste Gate Valve Control CIrcuit
MalfunctionOpen or short in VSV circuit for waste gate valve
VSV for waste gate valve
ECM

P1661
(DI-294)Exhaust Gate Valve Control CIr-
cuit MalfunctionOpen or short in VSV circuit for exhaust gate control valve
VSV for exhaust gate control valve
ECM

P1662
(DI-297)Exhaust Bypass Valve Control
CIrcuit MalfunctionOpen or short in VSV circuit for exhaust bypass valve
VSV for exhaust bypass valve
ECM

P1780
(DI-300)Park / Neutral Position Switch
MalfunctionShort in park / neutral position switch circuit
Park / neutral position switch
ECM

*:
.... MIL dose not light up
 ... MIL lights up

DI4SJ-01
S04073
Throttle Control ECU
VSV for Intake
Air Control Valve
(VSV1)
VSV for EXhaust
Bypass Valve
(VSV3) Heated Oxygen Sensor
(Bank 1 Sensor 1)
Ignition Coil
Mass Air Flow Meter
(Intake Air Temp. Sensor)
Engine Coolant Temp.
Sensor
VSV for Exhaust
Gas Control Valve
(VSV 2)
VSV for Waste
Gate Valve
(VSV4)VSV for EGR
ECM
IAC Valve
DLC1EGR Gas Temp. Sensor
Ignition Switch
Combination Meter
& Telltale Light RH
Fuel Pump ECU
Fuel Pump
No.1 Vehicle Speed Sensor
DLC3
Park/Neutral Position Switch
Stop Light Switch
Heated Oxygen Sensor
(Bank 1 Sensor 2) Igniter
Knock Sensor 2
Camshaft Position Sensor No.2
VSV for EVAP
Turbo Pressure Sensor
Camshaft Position Sensor No.1
Throttle Position Sensor
Sub Throttle Actuator Knock Sensor 1
Sub Throttle Position Sensor
Crankshaft Position Sensor
- DIAGNOSTICSENGINE (2JZ-GTE)
DI-163
391 Author
: Date
:
1997 SUPRA (RM502U)
PARTS LOCATION

DI4SK-01
S00576
P11278
ECM
FI6451
CHECK HARNESS A
ECU
FI6522
Before Connection
After Connection
Female
Connector Bolt
Collar
Stopper
Nut
Connector
Male
FI6523
Less Than 1 mm (0.04 in.) DI-164
- DIAGNOSTICSENGINE (2JZ-GTE)
392 Author
: Date
:
1997 SUPRA (RM502U)
TERMINALS OF ECM
Connectors of the ECM are water-proof and are the bolt type.
For water proof type connectors, in order to measure the volt-
age of ECM terminals and the resistance of connected parts,
connect the inspection check harness between the ECM and
vehicle wire harness, then perform the inspection.
The inspection method of inserting a tester probe from the other
side of connector noticeably reduces the water-proof ability.
Disconnect the connector by fully loosening the bolt.
PREPARATION
(a) Turn the ignition switch to LOCK position.
(b) Turn up the passenger side floor mat.
(c) Remove the ECM protector.
(d) Disconnect the connectors from the ECM.
After completely loosening the bolt, the 2 parts of connec-
tor can be separated.
NOTICE:

Do not pully the wire harness when disconnecting the
connector.

When disconnecting the connector, the ECM's back-
up power source is cut off, so the DTC, etc. recorded
in the ECM memory are cancelled.

Never insert a tester probe or male terminal used for
inspection purposes into the female terminal of the
vehicle wire harness. Otherwise, the female terminal
may be widened, which can result in faulty connec-
tion.
(e) Connect the Check Harness A between ECM and con-
nector of vehicle wire harness.
SST 09990-01000
HINT:
The arrangement of the DLC1 terminals are the same as those
of the ECM (See page DI-164).
(f) Disconnect the Check Harness A.
(g) Reconnect the connectors to the ECM.
(1) Match the male connector correctly with female
connector, then press them together.
(2) Tighten the bolt.
Make sure the connector is completely connected,
by tightening the bolt until there is a clearance of
less than 1 mm (0.04 in.) between bottom of the
male connector and end of the female connector.
(h) Install the ECM protector and floor mat.

FI6460
ECM Terminals
B(E9)A(E10)
1
2 3 4 5 6 7 8 9 10
20 19 18 17 16 15 14 13 12 11
30 29 28 27 26 25 24 23 22 21
40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 211 2
3 4 5 6 7 8 9 10 19 18 17 16 15 14 13 12 11
20
40 39 38 37 36 35 34 33 32 31
50 49 48 47 46 45 44 43 42 41
70 69 68 67 66 65 64 63 62 61 60
59 58 57 56 55 54 53 52 51
8079 78 77 76 75 74 73 72 71
- DIAGNOSTICSENGINE (2JZ-GTE)
DI-165
393 Author
: Date
:
1997 SUPRA (RM502U)Symbols (Terminals No.)
Wiring ColorConditionSTD Voltage (V)
BATT (A33) - E1 (B69)B-W e BRAlways9 - 14
IGSW (A1) - E1 (B69)B-W e BRIG switch ON9 - 14
+B (A31) - E1 (B69)B-R e BRIG switch ON9 - -14
VCC (B41) - E2 (B65)L-Re W-BIG switch ON4.5 - 5.5
IDL1 (B64) E2 (B65)RWB
IG switch ON and apply vacuum to the throttle opener
Main throttle valve fully closed-0.1 - 3.0
IDL1 (B64) - E2 (B65)R e W-BIG switch ON

Main throttle valve fully opened9 - 14
IDL2 (B63) E2 (B65)GR RWB
IG switch ON
Sub-throttle valve fully closed-0.1 - 3.0
IDL2 (B63) - E2 (B65)GR-R e W-BIG switch ON

Sub-throttle valve fully open9 - 14
VTA1 (B43) E2 (B65)YWB
IG switch ON

Main or sub-throttle valve fully closed0.3 - 0.8
VTA1 (B43) - E2 (B65)Y e W-BIG switch ON

Main or sub-throttle valve fully open3.2 - 4.9
VTA2 (B42) E2 (B65)YLWB
IG switch ON

Main or sub-throttle valve fully closed0.3 - 0.8
VTA2 (B42) - E2 (B65)Y-L e W-BIG switch ON

Main or sub-throttle valve fully open3.2 - 4.9
VG (B66) - E2G (B28)Y-R e BRIdling0.7 - 1.7
THA (B45) - E2 (B65)P-L e W-BIdling, Intake air temp. 0°C (32°F) to 80°C (176°F)0.5 - 3.4
THW (B44) - E2 (B65)L-Y e W-BIdling, Engine Coolant temp. 60°C (140°F) to 120°C (248°F)0.2 - 1.0
THG (B46) - E2 (B65)BR-Y e W-BIdling after warning up1 - 4
STA (B77) - E1 (B69)B e BRCranking6.0 or more
IG switch ON9 - 14
#10 (B20) - E01 (B80)R-L e BRIdlingPulse generation
(See page DI-204)
IG switch ON9 - 14
#20 (B19) - E01 (B80)R-Y e BRIdlingPulse generation
(See page DI-204)
IG switch ON9 - 14
#30 (B18) - E01 (B80)R-G e BRIdlingPulse generation
(See page DI-204)
IG switch ON9 - 14
#40 (B17) - E01 (B80)R-W e BRIdlingPulse generation
(See page DI-204)