Page 681 of 1807

S03236
VSV for Exhaust Gas Control Valve
Actuator (for Exhaust Gas Control Valve)
VSV for Exhaust
Bypass Valve
Actuator
(for Exhaust
Bypass Valve)
VSV for Intake Air Control Valve
Actuator (for Intake Air Control Valve) Exhaust Manifold
Intake Manifold CAC Air Bypass Valve Actuator
(for Waste Gate Valve)Air
Cleaner VSV for Waste
Gate Valve
Waste Gate
Valve
ECM
DI-266
- DIAGNOSTICSENGINE (2JZ-GTE)
494 Author: Date:
1997 SUPRA (RM502U)
DTC P1511 Boost Pressure Low Malfunction
CIRCUIT DESCRIPTION
To control maximum turbocharging pressure the turbocharger system includes a waste gate valve or exhaust
bypass valve controlled by an actuator. The actuator is controlled by the manifold pressure which is duty
controlled by the VSV based on signals from the ECM.
DTC No.DTC Detecting ConditionTrouble Area
P1511
Under the following conditions (a), (b) and (c):
(a) After the engine is warmed up
(b) Engine rotation speed is 2,600 rpm is more
(c) At the time of WOT, under the condition with +150 mmHg or
less of intake pipe pressure
(2 trip detection logic)Actuator (for waste gate valve, intake air control valve, ex-
haust gas control valve, and exhaust bypass valve)
Short in VSV for waste gate valve, intake air control valve,
exhaust gas control valve and exhaust bypass valve circuit
ECM
Air intake (leakage or clogging)
DI4TI-01
Page 682 of 1807
BE6653S03250S03251
A03145
ON
Air Air
E
FE
F
VSV: OFF VSV: ON
- DIAGNOSTICSENGINE (2JZ-GTE)
DI-267
495 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.
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 Go to step 3.
NG
2 Check VSV for waste gate valve (See page SF-63).
NG Replace VSV for waste gate valve.
OK
Page 683 of 1807
S03256S03257BE6653
A03146
ON
AirAir
E
FE
F
VSV: OFF VSV: ON
DI-268
- DIAGNOSTICSENGINE (2JZ-GTE)
496 Author: Date:
1997 SUPRA (RM502U)
3 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 Go to step 5.
NG
4 Check VSV for exhaust bypass valve (See page SF-67).
NG Replace VSV for exhaust bypass valve.
OK
Page 684 of 1807
BE6653S03252S03253
A03147
ON
Air
Air
FE
F
VSV: OFF VSV: ONE
Air Filter
- DIAGNOSTICSENGINE (2JZ-GTE)
DI-269
497 Author: Date:
1997 SUPRA (RM502U)
5 Connect the TOYOTA hand-held tester and check operation of VSV for intake air
control 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 Go to step 7.
NG
6 Check VSV for intake air control valve (See page SF-61).
NG Replace VSV for intake air control valve.
OK
Page 685 of 1807
BE6653S03254S03255
A03148
ON
Air
F
VSV: OFF VSV: ONE Air
E
Air Filter
DI-270
- DIAGNOSTICSENGINE (2JZ-GTE)
498 Author: Date:
1997 SUPRA (RM502U)
7 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 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 Go to step 10.
NG
8 Check VSV for exhaust gas control valve (See page SF-65).
NG Replace VSV for exhaust gas control valve.
OK
9 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).
Page 686 of 1807
- DIAGNOSTICSENGINE (2JZ-GTE)
DI-271
499 Author: Date:
1997 SUPRA (RM502U)
10 Check connection of vacuum hose (See page EC-2).
NG Repair or replace.
OK
11 Check turbocharger components (See page TC-18).
NG Replace turbocharger components.
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 SF-63).
NG Replace VSV for waste gate valve.
OK
2 Check VSV for exhaust bypass valve (See page SF-67).
NG Replace VSV for exhaust bypass valve.
OK
Page 687 of 1807
BE6653S05420
A03149
ON
Check Harness A
VSV3(+) VSV2(+)
VSV1(+)
VSV4(+)
DI-272
- DIAGNOSTICSENGINE (2JZ-GTE)
500 Author: Date:
1997 SUPRA (RM502U)
3 Check VSV for intake air control valve (See page SF-61).
NG Replace VSV for intake air control valve.
OK
4 Check VSV for exhaust gas control valve (See page SF-65).
NG Replace VSV for exhaust gas control valve.
OK
5 Check voltage between terminal VSV1 ~ 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 VSV1 ~ VSV4 of ECM con-
nector and body ground.
OK:
Voltage: 9 - 14 V
NG Check and repair harness or connector be-
tween VSV for waste gate valve and ECM
(See page IN-28).
OK
Page 688 of 1807
- DIAGNOSTICSENGINE (2JZ-GTE)
DI-273
501 Author: Date:
1997 SUPRA (RM502U)
6 Check connection of vacuum hose (See page EC-2).
NG Repair or replace.
OK
7 Check operation of turbocharger components (See page TC-18).
NG Replace turbocharger components.
OK
Check and replace ECM (See page IN-28).