1997 TOYOTA SUPRA engine

DI-292
- DIAGNOSTICSENGINE (2JZ-GTE)
520 Author
: Date
:
1997 SUPRA (RM502U)
INSPECTION PROCEDURE
TOYOTA hand-held tester
1 Connect the TOYOTA hand-held tester and check operation of VSV for waste
gate valve (See page DI-266).
OK Go to step 3.
NG
2 Check VSV for waste gate valve (See page SF-63).
NG Replace VSV for waste gate valve.
OK
3 Check for open and short in harness and connector between EFI main relay
(Marking: EFI MAIN) and ECM (See page IN-28).
NG Repair or replace harness or connector.
OK
Check and replace ECM (See page IN-28).
OBDII scan tool (excluding TOYOTA hand-held tester)
1 Check VSV for waste gate valve (See page DI-266).
NG Replace VSV for waste gate valve.
OK

BE6653S03237
A03152
ON
Check Harness A
ECM
VSV4 (+)B60
- DIAGNOSTICSENGINE (2JZ-GTE)
DI-293
521 Author
: Date
:
1997 SUPRA (RM502U)
2 Check voltage between terminal VSV4 of ECM connector and body ground.
PREPARATION:
(a) Connect Check Harness A (See page DI-164).
(b) Turn ignition switch ON.
CHECK:
Measure voltage between terminal VSV4 of ECM connector
and body ground.
OK:
Voltage: A/T 9 - 14 V
M/T3 V or less
NG Check and repair harness or connector be-
tween VSV for waste gate valve and ECM
(See pageIN-28 ).
OK
Check and replace ECM (See page IN-28).

S03236
Exhaust Gas Control Valve
ECM
Pressure
Tank Air
Cleaner Actuator (for Exhaust
Gas Control Valve)
VSV for Exhaust
Gas Control
Valve
DI-294
- DIAGNOSTICSENGINE (2JZ-GTE)
522 Author
: Date
:
1997 SUPRA (RM502U)
DTC P1661 Exhaust Gas Control Valve Control Circuit
Malfunction
CIRCUIT DESCRIPTION
The valve controls the opening or closing of the No.2 exhaust passage in order to operate No.2 turbocharger.
DTC No.DTC Detecting ConditionTrouble Area
P1661
During idling, voltage level at the output terminal (VSV2) of
ECM is low
(2 trip detection logic)
Open or short in VSV circuit for exhaust gas control valve

VSV for exhaust gas control valve

ECM
WIRING DIAGRAM
Refer to page DI-266 for the WIRING DIAGRAM.
DI4TQ-01

BE6653S03254S03255A06731
ON
Air Air
E
FE
Air Filter
VSV: ON VSV: OFF
- DIAGNOSTICSENGINE (2JZ-GTE)
DI-295
523 Author
: Date
:
1997 SUPRA (RM502U)
INSPECTION PROCEDURE
TOYOTA hand-held tester
1 Connect the TOYOTA hand-held tester and check operation of VSV for exhaust
gas control valve.
PREPARATION:
(a) Connect the TOYOTA hand-held tester to DLC3.
(b) Turn ignition switch ON and TOYOTA hand-held tester
main switch ON.
(c) Select the ACTIVE TEST mode on the TOYOTA hand-
held tester.
CHECK:
Check operation of VSV when VSV is operated by the TOYOTA
hand-held tester.
OK:
VSV is ON:
Air from pipe E flows out through pipe F.
VSV is OFF:
Air from pipe E flows out through the air filter.
OK Check for intermittent problems
(See page DI-147).
NG
2 Check VSV for exhaust gas control valve (See page SF-65).
NG Replace VSV for exhaust gas control valve.
OK

BE6653P24633
A03153
ON
Check Harness A
ECM
B39
VSV2 (+)
DI-296
- DIAGNOSTICSENGINE (2JZ-GTE)
524 Author
: Date
:
1997 SUPRA (RM502U)
3 Check for open and short in harness and connector between EFI main relay
(Marking: EFI MAIN) and ECM (See page IN-28).
NG Repair or replace harness or connector.
OK
Check and replace ECM (See page IN-28).
OBDII scan tool (excluding TOYOTA hand-held tester)
1 Check VSV for exhaust gas control valve (See page SF-65).
NG Replace VSV for exhaust gas control valve.
OK
2 Check voltage between terminal VSV2 of ECM connector and body ground.
PREPARATION:
(a) Connect Check Harness A (See page DI-164).
(b) Turn ignition switch ON.
CHECK:
Measure voltage between terminal VSV2 of ECM connector
and body ground.
OK:
Voltage: 9 - 14 V
NG Check and repair harness or connector.
OK
Check and replace ECM (See page IN-28).

S03236
Air
Cleaner
Air Bypass
Valve
CAC
Pressure
Tank
Actuator (for Exhaust
Bypass Valve)
VSV for Exhaust
Bypass ValveECM
Exhaust Bypass
Valve
- DIAGNOSTICSENGINE (2JZ-GTE)
DI-297
525 Author
: Date
:
1997 SUPRA (RM502U)
DTC P1662 Exhaust Bypass Valve Control Circuit
Malfunction
CIRCUIT DESCRIPTION
This valve controls the opening or closing of the exhaust bypass passage to ensure a smooth transition from
1 turbo operation to 2 turbo operation.
DTC No.DTC Detecting ConditionTrouble Area
P1662
During idling, voltage level at the output terminal (VSV3) of
ECM is low
(2 trip detection logic)
Open or short in VSV circuit for exhaust bypass valve

VSV for exhaust bypass valve

ECM
WIRING DIAGRAM
Refer to page DI-266 for the WIRING DIAGRAM.
DI4TR-01

BE6653S03256S03257A06732
ON
Air
Air
FE
FE
VSV: ON
VSV: OFF
DI-298
- DIAGNOSTICSENGINE (2JZ-GTE)
526 Author
: Date
:
1997 SUPRA (RM502U)
INSPECTION PROCEDURE
TOYOTA hand-held tester
1 Connect the TOYOTA hand-held tester and check operation of VSV for exhaust
bypass valve.
PREPARATION:
(a) Connect the TOYOTA hand-held tester to the DLC3.
(b) Turn ignition switch ON and TOYOTA hand-held tester
main switch ON.
(c) Select the ACTIVE TEST mode on the TOYOTA hand-
held tester.
CHECK:
Check operation of VSV when VSV is operated by the TOYOTA
hand-held tester.
OK:
VSV is ON:
Air from pipe E flows out through pipe F.
VSV is OFF:
Air does not flow from pipe E to pipe F.
OK Check for intermittent problems
(See page DI-147).
NG
2 Check VSV for exhaust bypass valve (See page SF-67).
NG Replace VSV for exhaust bypass valve.
OK

BE6653S03239
A03154
ON
Check Harness A
ECM
B38
VSV3 (+)
- DIAGNOSTICSENGINE (2JZ-GTE)
DI-299
527 Author
: Date
:
1997 SUPRA (RM502U)
3 Check for open and short in harness and connector between EFI main relay
(Marking: EFI MAIN) and ECM (See page IN-28).
NG Repair or replace harness or connector.
OK
Check and replace ECM (See page IN-28).
OBDII scan tool (excluding TOYOTA hand-held tester)
1 Check VSV for exhaust bypass valve (See page SF-67).
NG Replace VSV for exhaust bypass valve.
OK
2 Check voltage between terminal VSV3 of ECM connector and body ground.
PREPARATION:
(a) Connect Check Harness A (See page DI-164).
(b) Turn ignition switch ON.
CHECK:
Measure voltage between terminal VSV3 of ECM connector
and body ground.
OK:
Voltage: 9 - 14 V
NG Check and repair harness or connector.
OK
Check and replace ECM (See page IN-28).