2000 TOYOTA CAMRY check engine

A02952
MREL (+)
DI±372
± DIAGNOSTICSENGINE (1MZ±FE)
607 Author: Date:
6 Check voltage between terminal MREL of ECM and body ground.
PREPARATION:
Turn the ignition switch ON.
CHECK:
Measure voltage between terminal MREL of the ECM
connectors and body ground.
OK:
Voltage: 9 ~ 14 V
NG Check and replace ECM (See page DI±197).
OK
7 Check EFI No.1 fuse of engine room J/B.
NG Check for short in all the harness and compo-
nents connected to EFI No.1 fuse
(See attached wiring diagram).
OK
8 Check EFI main relay (Marking: EFI) (See page SF±53).
NG Replace EFI main relay (Marking: EFI).
OK

± DIAGNOSTICSENGINE (1MZ±FE)
DI±373
608 Author: Date:
9 Check for open and short in harness and connector between terminal MREL of
ECM and body ground (See page IN±31).
NG Repair or harness or connector.
OK
Check and repair harness or connector be-
tween EFI No.1 fuse and battery
(See page IN±31).

A00244
ON
BE6653
P20186
DI±376
± DIAGNOSTICSENGINE (1MZ±FE)
611 Author: Date:
INSPECTION PROCEDURE
TOYOTA hand±held tester
1 Connect TOYOTA hand±held tester and check operation of fuel pump.
PREPARATION:
(a) Connect the TOYOTA hand±held tester to the DLC3.
(b) Turn the ignition switch ON and push the TOYOTA hand±
held tester main switch ON.
(c) Use ACTIVE TEST mode to operate the fuel pump.
CHECK:
Check that pulsation damper screw rises up when fuel pump is
on by TOYOTA hand±held tester.
OK:
The pulsation damper screw rises up.
OK Check for starter signal circuit
( See page DI±384).
NG
2 Check for ECM power source circuit (See page DI±369).
NG Repair or replace.
OK
3 Check circuit opening relay (See page SF±54).
NG Replace circuit opening relay.
OK

A02064
ON
FC (+)
± DIAGNOSTICSENGINE (1MZ±FE)
DI±377
612 Author: Date:
4 Check voltage between terminal FC of ECM and body ground.
PREPARATION:
(a) Remove the glove compartment (See page SF±73).
(b) Turn ignition switch ON.
CHECK:
Measure voltage between terminal FC of ECM and body
ground.
OK:
Voltage 9 ± 14 V
NG Check for open in harness and connector be-
tween EFI main relay (Marking: EFI) and circuit
opening relay, circuit opening relay and ECM.
OK
5 Check fuel pump (See page SF±6).
NG Repair or replace fuel pump.
OK
6 Check for open in harness and connector between circuit opening relay
and fuel pump, and fuel pump and body ground
(See page IN±31).
NG Repair or replace harness or connector.
OK
Check and replace ECM (See page IN±31).

A02042
ON
FC
DI±378
± DIAGNOSTICSENGINE (1MZ±FE)
613 Author: Date:
OBD II scan tool (excluding TOYOTA hand±held tester)
1 Check operation of fuel pump.
PREPARATION:
(a) Remove the glove compartment (See page SF±73).
(b) Turn the ignition switch ON.
CHECK:
(a) Connect between terminal FC of the ECM connector and
body ground.
(b) Check that pulsation damper screw rises up when con-
nect between terminal FC of the ECM and body ground.
OK:
The pulsation damper screw rises up.
OK Check for starter signal circuit
( See page DI±384).
NG
2 Check for ECM power source circuit (See page DI±369).
NG Repair or replace.
OK
3 Check circuit opening relay (See page SF±54).
NG Replace circuit opening relay.
OK

A02064
ON
FC (+)
± DIAGNOSTICSENGINE (1MZ±FE)
DI±379
614 Author: Date:
4 Check voltage between terminal FC of ECM and body ground.
PREPARATION:
(a) Remove the glove compartment (See page SF±73).
(b) Turn ignition switch ON.
CHECK:
Measure voltage between terminal FC of ECM and body
ground.
OK:
Voltage 9 ± 14 V
NG Check for open in harness and connector be-
tween EFI main relay (Marking: EFI) and circuit
opening relay, circuit opening relay and ECM.
OK
5 Check fuel pump (See page SF±6).
NG Repair or replace fuel pump.
OK
6 Check for open in harness and connector between circuit opening relay and fuel
pump, and fuel pump and body ground (See page IN±31).
NG Repair or replace harness or connector.
OK
Check and replace ECM (See page IN±31).

A00307
ON
VSV is ON VSV is OFF
Air Filter Air
Air
E
FE
F
BE6653
FI7073 FI7074
Air Filter
± DIAGNOSTICSENGINE (1MZ±FE)
DI±381
616 Author: Date:
INSPECTION PROCEDURE
TOYOTA hand±held tester
1 Connect TOYOTA hand±held tester and check operation of VSV for ACIS.
PREPARATION:
(a) Remove the fuse cover on the instrument panel.
(b) Connect the TOYOTA hand±held tester to the DLC3.
(c) Turn the ignition switch ON and push the TOYOTA hand±
held tester main switch ON.
(d) 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 is flowing out through pipe F.
VSV is OFF:
Air from pipe E is flowing out through the air filter.
OK Check for vacuum tank (See page SF±51).
NG
2 Check VSV for ACIS (See page SF±60).
NG Replace VSV for ACIS.
OK

A02041
ON
ACIS (+)
DI±382
± DIAGNOSTICSENGINE (1MZ±FE)
617 Author: Date:
3 Check for open and short in harness and connector between EFI main relay
(Marking: EFI) and ECM (See page IN±31).
NG Repair or replace harness or connector.
OK
Check and replace ECM (See page IN±31).
OBD II scan tool (excluding TOYOTA hand±held tester)
1 Check VSV for ACIS (See page SF±60).
NG Replace VSV for ACIS.
OK
2 Check voltage between terminal ACIS of ECM connector and body ground.
PREPARATION:
(a) Remove the glove compartment (See page SF±73).
(b) Turn the ignition switch ON.
CHECK:
Measure voltage between terminal ACIS of the ECM connector
and body ground.
OK:
Voltage: 9 ~ 14 V
NG Check for open and short in harness and con-
nector between EFI main relay (Marking: EFI)
and ECM (See page IN±31).
OK