1997 TOYOTA SUPRA Service Repair Manual

Page 641 of 1807

TOYOTA SUPRA 1997  Service Repair Manual A00174
ON
EGR Gas Temp. Sensor
2
146
65
B
BTHG
ECM
5V
E2
A00691
ON
EGR Gas Temp. SensorECM
5V
THG
E2
ECM
B Connector
DI-228
- DIAGNOSTICSENGINE (2JZ-GTE)
456 Author: Date:
1997 SUPRA   (RM502U)
2 Ch

Page 642 of 1807

TOYOTA SUPRA 1997  Service Repair Manual S03243S03486
A03069
EGR Gas Temp. Sensor
Connector
- DIAGNOSTICSENGINE (2JZ-GTE)
DI-229
457 Author: Date:
1997 SUPRA   (RM502U)
4 Check the VSV for EGR (See page DI-217, step 6).
OK Check EGR valve

Page 643 of 1807

TOYOTA SUPRA 1997  Service Repair Manual DI-230
- DIAGNOSTICSENGINE (2JZ-GTE)
458 Author: Date:
1997 SUPRA   (RM502U)
2 Check for short in harness and connector between EGR gas temp. sensor and
ECM (See page EC-7).
NG Repair or replace har

Page 644 of 1807

TOYOTA SUPRA 1997  Service Repair Manual FI7081
Waveform of oxygen sensor
before catalystNormal
catalystWaveform of oxygen sensor
after catalyst
- DIAGNOSTICSENGINE (2JZ-GTE)
DI-231
459 Author: Date:
1997 SUPRA   (RM502U)
DTC P0420 Catalys

Page 645 of 1807

TOYOTA SUPRA 1997  Service Repair Manual FI7132
Engine Speed
2,500 - 3,000 rpm
Idling
IG SW OFF
Warmed up 3 min. or so CheckTime (1)(2)(3) (4)
FI6514
OX Signal Waveform (Oscilloscope)
200 msec./Division 1.0 V
0 V DI-232
- DIAGNOSTICSENGINE (

Page 646 of 1807

TOYOTA SUPRA 1997  Service Repair Manual - DIAGNOSTICSENGINE (2JZ-GTE)
DI-233
461 Author: Date:
1997 SUPRA   (RM502U)
INSPECTION PROCEDURE
1 Are there any other code (besides DTC P0420) being output?
YES Go to relevant DTC chart.
NO
2 Chec

Page 647 of 1807

TOYOTA SUPRA 1997  Service Repair Manual S05422
To Turbo
Charcoal
Canister
Fuel Tank
ECMIntake Manifold VSV for
EVAP
S01079
Battery
EB
W-B
BB-W
R/B No.2
EFI No.1
EFI Main Relay
2 2A
2
2 2
2
35
1 2
B-R
B-YB-REA22VSV for EVAP
1274
B
ECM
EVAP
E

Page 648 of 1807

TOYOTA SUPRA 1997  Service Repair Manual A00711
ON
Air
Air
FEF
E
VSV: ON VSV: OFF
- DIAGNOSTICSENGINE (2JZ-GTE)
DI-235
463 Author: Date:
1997 SUPRA   (RM502U)
INSPECTION PROCEDURE
TOYOTA hand-held tester
1 Connect the TOYOTA hand-held test