1997 TOYOTA SUPRA engine coolant

N09214
DLC3 DI-148
- DIAGNOSTICSENGINE (2JZ-GTE)
376 Author
: Date
:
1997 SUPRA (RM502U)
The 2 trip repeats the same mode a 2nd time. (However,
the IG switch must be turned OFF between the 1st trip and
2nd trip).
Freeze frame data:
Freeze frame data records the engine condition when a
misfire (DTC P0300 - P0306) or fuel trim malfunction
(DTC P0171, P0172), or other malfunction (first malfunc-
tion only), is detected.
Because freeze frame data records the engine conditions
(fuel system, calculator load, engine coolant tempera-
ture, fuel trim, engine speed, vehicle speed, etc.) when
the malfunction is detected, when troubleshooting it is
useful for determining whether the vehicle was running or
stopped, the engine warmed up or not, the air-fuel ratio
lean or rich, etc. at the time of the malfunction.
Priorities for Troubleshooting:
If troubleshooting priorities for multiple DTC are given in
the applicable diagnostic chart, these should be followed.
If no instructions are given troubleshoot DTC according
to the following priorities.
(1) DTC other than fuel trim malfunction (DTC P0171,
P0172), EGR (DTC P0401, P0402), and misfire
(DTC P0300 - 0306).
(2) Fuel trim malfunction (DTC P0171, P0172) and
EGR (DTC P0401, P0402).
(3) Misfire (DTC P0300 - P0306).
(b) Check the DLC3.
The vehicle's ECM uses V.P.W. (Variable Pulse Width) for
communication to comply with SAE J1850. The terminal
arrangement of DLC3 complies with SAE J1962 and
matches the V.P.W. format.
Terminal No.Connection / Voltage or ResistanceCondition
2Bus  Line / Pulse generationDuring transmission
4Chassis Ground / e Body Ground 1 W or lessAlways
5Signal Ground / e Body Ground 1 W or lessAlways
16Battery Positive / e Body Ground 9 - 14 VAlways
HINT:
If your display shows ºUNABLE TO CONNECT TO VEHICLEº
when you have connected the cable of the OBD II scan tool or
TOYOTA hand-held tester to DLC3, turned the ignition switch
ON and operated the scan tool, there is a problem on the ve-
hicle side or tool side.

If communication is normal when the tool is connected to
another vehicle, inspect DLC3 on the original vehicle.

If communication is still not possible when the tool is con-
nected to another vehicle, the problem is probably in the
tool itself, so consult the Service Department listed in the
tool's instruction manual.

- DIAGNOSTICSENGINE (2JZ-GTE)
DI-151
379 Author
: Date
:
1997 SUPRA (RM502U)
4. FAIL-SAFE CHART
If any of the following codes is recorded, the ECM enters fail-safe mode.
DTC No.Fail-Safe OperationFail-safe Deactivation Conditions
P0100Fuel cutReturned to normal condition
P0110Intake air temp. is fixed at 20°C (68°F)Returned to normal condition
P0115Engine coolant temp. is fixed at 80°C (176°F)Returned to normal condition
P0120VTA is fixed at 0°
The following condition must be repeated at least 2 times
consecutively
When closed throttle position switch is ON:
0.25 V  VTA1 0.95 V
P0135
P0141The heater circuit in which an abnormality is detected is
turned offIgnition switch OFF
P0325
P0330Max. timing retardationIgnition switch OFF
P0500High RPM fuel cut is prohibited
IAC control prohibitedReturned to normal condition
P1100HAC is fixed at 760 mm HgReturned to normal condition
P1300Fuel cutReturned to normal condition
P1400Sub throttle valve is fixed at almost fully-open position
The following condition must be repeated at least 2 times
consecutively.
When closed subthrottle position switch is ON:
0.25 V  VTA2 0.95 V
P1405Waste gate valve is fixed at open positionReturned to normal condition
P1512Fuel cutPressure intake manifold  1400 mm Hg´abs
P1605Max. timing retardationReturned to normal condition
P1630Does not into the manual patternReturned to normal condition
5. CHECK FOR INTERMITTENT PROBLEMS
TOYOTA hand-held tester only:
By putting the vehicle's ECM in check mode, 1 trip detection logic is possible instead of 2 trip detection logic
and sensitivity to detect open circuits is increased. This makes it easier to detect intermittent problems.
(1) Clear DTC (See page DI-147)
(2) Set check mode (See page DI-147)
(3) Perform a simulation test (See page IN-18)
(4) Connector connection and terminal inspection (See page IN-28)
(5) Visual check and contact pressure check (See page IN-28)
(6) Connector handling (See page IN-28)

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

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

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)