TOYOTA HIGHLANDER 2001 Service Repair Manual
Page 841 of 2572
Y
A54315
A54316
A87791
Air
Port EAir Filter(a)
Air
Port E
Port FBattery
(b)
05-664
- DIAGNOSTICSSFI SYSTEM (3MZ-FE)
854 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
4 CHECK VACUUM HOSES (INTAKE MANIFOLD - INTAKE AIR CONTROL VALVE,
INTAKE AIR CONTROL)
(a) Check that the vacuum hoses are:
Connected correctly.
Are not loose or disconnected.
Do not have cracks, holes or damage.
NG REPAIR OR REPLACE VACUUM HOSES
OK
5 INSPECT INTAKE AIR CONTROL VALVE (See page 13-2)
NG REPLACE INTAKE AIR CONTROL VALVE
OK
REPLACE ECM (See page 10-24)
OBD II scan tool (excluding hand-held tester):
1 INSPECT VSV FOR IAC VALVE NO.2 (OPERATION)
(a) Disconnect the VSV connector.
(b) Check operation of the VSV when battery positive voltage
is applied to the terminals of the VSV.
OK:
Battery positive voltage is not applied:
Air from port E flows out through the air filter.
Battery positive voltage is applied:
Air from port E flows out through port F.
NG REPLACE VSV
OK
Page 842 of 2572
A76903
E1 (-)
E9
ECM
ACIS (+)
E7
ECM
- DIAGNOSTICSSFI SYSTEM (3MZ-FE)
05-665
855 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
2 CHECK ECM (ACIS VOLTAGE)
(a) Start the engine.
(b) Check the voltage of the ECM connectors.
Standard
Tester ConnectionConditionSpecified Condition
E7-15 (ACIS)
- E9-1 (E1)
Engine speed is 4,000
rpm or less
Throttle valve opening
angle is 30 or more
9 to 14 V
OK Go to step 4
NG
Page 843 of 2572
Y
A85675
A81699A87763
Wire Harness Side
V2
VSV for IAC Valve No. 2
E7
ECM
ACIS
A85448
A90291A92391
Wire Harness Side
V2
VSV for IAC Valve No. 2
EFI Relay
Engine Room J/B
05-666
- DIAGNOSTICSSFI SYSTEM (3MZ-FE)
856 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
3 CHECK WIRE HARNESS (VSV FOR IAC VALVE NO. 2 - ECM, VSV FOR IAC VALVE
NO.2 - EFI RELAY)
(a) Check the wire harness between the VSV and ECM.
(1) Disconnect the V2 VSV connector.
(2) Disconnect the E7 ECM connector.
(3) Check the resistance of the wire harness side con-
nectors.
Standard:
Tester ConnectionSpecified Condition
V2-2 - E7-15 (ACIS)Below 1 W
V2-2 or E7-15 (ACIS) - Body ground10 kW or higher
(b) Check the wire harness between the VSV and EFI relay.
(1) Disconnect the V2 VSV connector.
(2) Remove the EFI relay from the engine room J/B.
(3) Check the resistance OF the wire harness side con-
nectors.
Standard:
Tester ConnectionSpecified Condition
V2-1 (VSV for ACIS) - J/B EFI relay terminal 3Below 1 W
NG REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
Page 844 of 2572
- DIAGNOSTICSSFI SYSTEM (3MZ-FE)
05-667
857 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
4 CHECK VACUUM HOSES (INTAKE MANIFOLD - INTAKE AIR CONTROL VALVE,
INTAKE AIR CONTROL)
(a) Check that the vacuum hoses are:
Connected correctly.
Are not loose or disconnected.
Do not have cracks, holes or damage.
NG REPAIR OR REPLACE VACUUM HOSE
OK
5 INSPECT INTAKE AIR CONTROL VALVE (See page 13-2)
NG REPLACE INTAKE AIR CONTROL VALVE
OK
REPLACE ECM (See page 10-24)
Page 845 of 2572
A87847
EFI Relay EFI NO. 1 Fuse Engine Room J/B
Vacuum Tank
Engine Mounting Insulator FR
Air Cleaner Cap
05-668
- DIAGNOSTICSSFI SYSTEM (3MZ-FE)
858 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
ACTIVE CONTROL ENGINE MOUNT
LOCATION
05EXI-05
Page 846 of 2572
A88702
EH FL
MainEFI NO. 2
2IK313 2D
5
3
5P-L
BatteryEFI RelayEngine Room R/B No. 2
WEngine Room J/B
1ECM
MREL
E58
BY-G V5
VSV for ACM
27
B B-W
1EB2 2 2
2 1
Y
3
14EFI NO. 1
2I 2F2B
W 3
1F7
FL Block
Assy
A
J2
J/C W-BACM 6
E9
- DIAGNOSTICSSFI SYSTEM (3MZ-FE)
05-669
859 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
CIRCUIT DESCRIPTION
The Active Control Engine Mount (ACM) system decreases engine vibration at low engine speed using the
VSV for ACM. The VSV is controlled by a pulse signal transmitted to the VSV from the ECM. The frequency
of this pulse signal is matched to the engine speed to decrease engine vibration.
WIRING DIAGRAM
Page 847 of 2572
A61613
A
C EngineB IAC Valve
Actuator
Air Cleaner
Front Engine Mount InsulatorVSVCap ECM Vacuum Tank
A61611
05-670
- DIAGNOSTICSSFI SYSTEM (3MZ-FE)
860 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
INSPECTION PROCEDURE
1 CHECK VACUUM HOSES
(a) Check if the vacuum hose cap is missing.
(b) If the hose is damaged, replace the vacuum hose assem-
bly.
(c) Check the air and vacuum hoses for looseness, discon-
nection and blockage.
NG REPAIR OR REPLACE VACUUM HOSES
OK
2 CHECK VACUUM
(a) Start the engine.
(b) Disconnect the vacuum hose from the vacuum tank.
(c) Check that the unconnected port located on the vacuum
tank applies suction to your finger.
(d) Reconnect the vacuum hose.
NG CHECK AND REPLACE VACUUM SOURCE AND
HOSES
OK
Page 848 of 2572
A88570
GND 5 V/
Division
10 V/DivisionACM (+) E1 (-)
E9
ECM
C58536
1 2
V5
VSV for
ACM
- DIAGNOSTICSSFI SYSTEM (3MZ-FE)
05-671
861 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
3 INSPECT ECM (ACM VOLTAGE)
(a) Connect the oscilloscope between terminals ACM and E1
of the E9 ECM connector.
(b) Warm up engine to normal operating temperature.
(c) Turn the A/C switch on.
(d) Measure the voltage between terminals ACM and E1 of
the E9 ECM connector.
Result:
ConditionVoltage
Shift position is D range, and
engine speed is 850 rpm or lessPulse generation
Shift position is D range, and
engine speed is 950 rpm or more9 to 14 V
Shift position is P range9 to 14 V
OK Go to step 6
NG
4 INSPECT VSV FOR ACM (RESISTANCE)
(a) Disconnect the V5 VSV connector.
(b) Measure the resistance between the terminals 1 and 2.
Standard: 19 to 21 W at 20C (68F)
NG REPLACE VSV
OK
Page 849 of 2572
A87797
Wire Harness Side
V5
VSV for ACM
E9
ECM
ACM
A85448
A90291A92392
Wire Harness Side
V5
VSV for ACM
EFI Relay
Engine Room J/B
05-672
- DIAGNOSTICSSFI SYSTEM (3MZ-FE)
862 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
5 CHECK WIRE HARNESS (VSV FOR ACM - ECM, VSV FOR ACM - EFI RELAY)
(a) Check the wire harness between the VSV and ECM.
(1) Disconnect the V5 VSV connector for ACM.
(2) Disconnect the E9 ECM connector.
(3) Check the resistance of the wire harness side con-
nectors.
Standard:
Tester ConnectionSpecified Condition
V5-2 - E9-6 (ACM)Below 1 W
V5-2 or E9-6 (ACM) - Body ground10 kW or higher
(b) Check the wire harness between the VSV and EFI relay.
(1) Disconnect the V5 VSV connector.
(2) Remove the EFI relay from the engine room J/B.
(3) Check the resistance of the wire harness side con-
nectors.
Standard:
Tester ConnectionSpecified Condition
V5-1 (VSV for ACM) - J/B EFI relay terminal 3Below 1 W
NG REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
REPLACE ECM (See page 10-24)
Page 850 of 2572
G
E
H
E
HF G FG
E
H
H F
E
F G
A52014
A51989
- DIAGNOSTICSSFI SYSTEM (3MZ-FE)
05-673
863 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
6 INSPECT VSV FOR ACM (OPERATION)
(a) Remove the VSV.
(b) Check operation of the VSV when battery positive voltage
is applied to the terminals of the VSV connector.
OK:
Battery positive voltage is not applied:
The air from pipe G is flowing out through pipes E and
H.
Battery positive voltage is applied:
The air from pipe F is flowing out through pipes E and
H.
NG REPLACE VSV FOR ACM
OK
7 INSPECT TRANSVERSE ENGINE ENGINE MOUNTING INSULATOR
(a) Disconnect the vacuum hose from the front engine mount
insulator.
(b) Using MITYVAC (hand-held vacuum pump), apply a vac-
uum of 80 kPa (600 mmHg, 25 in.Hg) and wait for 1 min-
ute.
(c) Make sure there is no needle movement on the MITY-
VAC.
(d) Check that there is no fluid leakage caused by a broken
lower diaphragm.
NG REPLACE TRANSVERSE ENGINE ENGINE
MOUNTING INSULATOR
OK
SYSTEM OK