Page 2713 of 4770
A07446
J20
Junction
Connector
EFI Relay
2K2J
2C
BB±YJ27 J28
W±B
EB
9B±Y Y±G
AA1218
13 1
2
G±Y
BRECM
EGR
E01
EGLS5 V
E2 32
VC
5 V
THG
E7
2
1W±GY
BR18
8
MREL
B+ BR
EGR Gas Temp. Sensor
E10 E10
22
E11 E10E11
Engine Room J/B
2A2
7 1
53
1 5
EFI
VSV
for EGR
B±Y
Junction
Connector
B
2
B±Y
J35
J35C
C Junction
ConnectorB±W
B±W
B±W
EGR Valve
Position Sensor
II3From
FL MAIN
S06906
Vehicle Speed
70 ~ 90 km/h
(43 ~ 56 mph)
Idling
IG SW OFF(1)(2)(3)
(4)(5)
Warmed up 3 ~ 5 min. 3 min. 3 ~ 5 min. 2 min.Time
± DIAGNOSTICSENGINE (1MZ±FE)
DI±293
528 Author: Date:
WIRING DIAGRAM
SYSTEM CHECK DRIVING PATTERN
Page 2714 of 4770

DI±294
± DIAGNOSTICSENGINE (1MZ±FE)
529 Author: Date:
(1) Connect the OBD II scan tool or TOYOTA hand±held tester to the DLC3.
(2) Start and warm up the engine with all accessories switched OFF.
(3) Run the vehicle at 70 ~ 90 km/h (43 ~ 56 mph) for 3 min. or more.
(4) Idle the engine for about 2 min.
(5) Do steps (3) and (4) again.
(6) Stop at safe place and turn the ignition switch OFF.
(7) Do step (2) to (5) again.
(8) Check the READINESS TESTS mode on the OBD II scan tool or TOYOTA hand±held tester.
If COMPL is displayed and the MIL does not light up, the system is normal.
If INCMPL is displayed and the MIL does not light up, run the vehicle steps (2) to (6) from some times and
check it.
HINT:
INCMPL is displayed when either condition (a) or (b) exists.
(a) The system check is incomplete.
(b) There is a malfunction in the system.
If there is a malfunction in the system, the MIL light up after step (7) above is done.
(2trip detection logic)
INSPECTION PROCEDURE
HINT:
Read freeze frame data using TOYOTA hand±held tester or OBD II scan tool. Because freeze frame records
the engine conditions 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.
TOYOTA hand±held tester
1 Connect TOYOTA hand±held tester, and read value of EGR gas temperature.
PREPARATION:
(a) Connect the TOYOTA hand±held tester to the DLC3.
(b) Warm up the engine.
CHECK:
Read EGR gas temperature on TOYOTA hand±held tester during idling.
OK:
EGR gas temperature : 55C (415F) ~ 1505C (3025F) (Not immediately after driving)
HINT:
If there is an open circuit, TOYOTA hand±held tester indicates 3.15C (37.65F).
If there is an short circuit, TOYOTA hand±held tester indicates 159.35C (318.75F).
OK Go to step 4.
NG
Page 2715 of 4770
A00305
ON
ON EGR Gas Temp.
Sensor
EGR Gas Temp.
SensorECM
ECM
5 V
5 V
E2
E2
1
2
1
2
THG
THG18 13
E10
E10
E10E10
13
18
± DIAGNOSTICSENGINE (1MZ±FE)
DI±295
530 Author: Date:
2 Check for open or short in harness or ECM.
For open circuit
PREPARATION:
(a) Disconnect the EGR gas temp. sensor connector.
(b) Connect the sensor wire harness terminals together.
(c) Turn the ignition switch ON.
CHECK:
Read EGR gas temperature on the TOYOTA hand±held tester.
OK:
EGR gas temperature : 159.35C (318.75F)
For short circuit
PREPARATION:
Disconnect the EGR gas temp. sensor connector.
CHECK:
Read EGR gas temperature on the TOYOTA hand±held tester.
OK:
EGR gas temp. : 3.15C (37.65F)
OK Confirm good connection at sensor.
If OK, check and replace EGR gas temp. sensor.
NG
Page 2716 of 4770
A02048
ECM
THG E2ON
1
2E0
E107THG
E2 13
18 EGR Gas Temp. Sensor
5 V
A02043
ECM ON
EGR Gas Temp. Sensor
E10
5 V
THG
E2
DI±296
± DIAGNOSTICSENGINE (1MZ±FE)
531 Author: Date:
3 Check for open or short in harness or ECM.
For open circuit
PREPARATION:
(a) Remove the glove compartment (See page SF±73).
(b) Connect between terminals THG and E2 of the ECM con-
nectors.
HINT:
EGR gas temp. sensor connector is disconnected. Before
checking, do a visual check and contact pressure check for the
ECM connector (See page IN±31).
CHECK:
Read EGR gas temperature on the TOYOTA hand±held tester.
OK:
EGR gas temperature : 159.35C (318.75F)
For short circuit
PREPARATION:
(a) Remove the glove compartment (See page SF±73).
(b) Disconnect the E10 connector of ECM.
CHECK:
Read EGR gas temperature on the TOYOTA hand±held tester.
OK:
EGR gas temperature: 3.15C (37.65F)
OK Repair or replace harness.
NG
Confirm connection at ECM.
If OK, check and replace ECM.
Page 2717 of 4770
A02507BE6653
A02839
ON
Air
E
GAir
G
FFE VSV is ON VSV is OFF
± DIAGNOSTICSENGINE (1MZ±FE)
DI±297
532 Author: Date:
4 Check connection and blockage of vacuum hose (See page EC±2).
NG Repair or replace vacuum hose.
OK
5 Check VSV for EGR.
PREPARATION:
Select the ACTIVE TEST mode on the TOYOTA hand±held
tester.
CHECK:
Check operation VSV, when it is operated by the TOYOTA
hand±held tester.
OK:
VSV is ON:
Air from pipe E is flowing out through pipe F and G.
VSV is OFF:
Air from pipe E is flowing out through pipe G.
OK Go to step 8.
NG
6 Check operation of VSV for EGR (See page SF±56).
NG Replace VSV for EGR.
OK
Check for open in harness and connector
between engine room J/B and ECM.
Page 2718 of 4770
S05410
Vacuum
EGR Valve
DI±298
± DIAGNOSTICSENGINE (1MZ±FE)
533 Author: Date:
7 Check EGR system (See page EC±11).
NG Repair or replace.
OK
8 Check EGR valve.
PREPARATION:
(a) Disconnect the vacuum hose from EGR valve.
(b) Start the engine.
CHECK:
Check whether the engine stall when apply vacuum to EGR
valve.
OK:
Engine runs rough or stall.
NG Repair or replace EGR valve.
OK
9 Check vacuum control valve (See page EC±11).
NG Replace vacuum control valve.
OK
Check and replace ECM (See page IN±31).
Page 2719 of 4770
P23871
EGR Gas Temp. Sensor
Connector
± DIAGNOSTICSENGINE (1MZ±FE)
DI±299
534 Author: Date:
OBDII scan tool (excluding TOYOTA hand±held tester)
1 Check resistance of EGR gas temp. sensor.
PREPARATION:
Disconnect the EGR gas temp. sensor connector.
CHECK:
Measure resistance between terminals of the EGR gas temp.
sensor connector.
OK:
Resistance: 2.5 kW ~ 600 kW
(Not immediately after driving)
HINT:
If there is open circuit, ohmmeter indicates 720 kW or more.
If there is short circuit, ohmmeter indicates 200 W or less.
NG Replace EGR gas temp. sensor.
OK
2 Check for open and short in harness and connector between EGR gas temp.
sensor and ECM (See page IN±31).
NG Repair or replace harness or connector.
OK
3 Check connection and blockage of vacuum hose (See page EC±2).
NG Repair or replace vacuum hose.
OK
Page 2720 of 4770
A02047
ON
EGR
ONOFF
VSV is ON VSV is OFF
G
E11
Air
FG Air
F EE
DI±300
± DIAGNOSTICSENGINE (1MZ±FE)
535 Author: Date:
4 Check VSV for EGR.
PREPARATION:
(a) Remove the glove compartment (See page SF±73).
(b) Disconnect the E11 connector of ECM.
(c) Turn the ignition switch ON.
CHECK:
Check VSV function.
(1) Connect between terminal EGR of the ECM and
body ground (VSV is ON).
(2) Disconnect between terminal EGR of the ECM and
body ground (VSV is OFF).
OK:
(1) VSV is ON:
Air from pipe E flows out through pipe F.
(2) VSV is OFF:
Air from pipe E flows out through pipe G.
OK Go to step 7.
NG
5 Check operation of VSV for EGR (See page SF±56).
NG Replace VSV for EGR.
OK
Check for open in harness and connector
between engine room J/B and ECM
(See page IN±31).
6 Check EGR system (See page EC±11).
NG Repair or replace.
OK