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
Page 851 of 2572
05-1954
- DIAGNOSTICSPOWER DOOR LOCK CONTROL SYSTEM
2144 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
ALL DOORS ARE NOT OPERATED BY THE DRIVER'S DOOR KEY
CYLINDER FOR INTERLOCKED WITH KEY
CIRCUIT DESCRIPTION
A lock or unlock signal via the manual switch (built in the master switch) and driver door key is transmitted
to the multiplex network body ECU multiply from the master switch (door ECU), and the multiplex network
body ECU drives the door lock motor of each door.
WIRING DIAGRAM
HINT:
Refer to See page 05-1944.
INSPECTION PROCEDURE
0526M-02
Page 852 of 2572
B51545
Unlock
Lock
OFF
B51546
Unlock
Lock
- DIAGNOSTICSPOWER DOOR LOCK CONTROL SYSTEM
05-1955
2145 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
1 INSPECT FRONT DOOR LOCK ASSY LH
(a) Inspect the door lock assy continuity.
Standard:
Switch positionTester connectionSpecified condition
Lock2 @ 4Continuity
OFF-No continuity
Unlock2 @ 3Continuity
(b) Inspect the door lock motor operation.
Standard:
Measuring conditionOperation
Battery positive - Terminal 5
Battery negative - Terminal 6Lock
Battery positive - Terminal 6
Battery negative - Terminal 5Unlock
(c) Inspect the position switch continuity.
Standard:
Measuring conditionTester connectionSpecified condition
Battery positive -
Terminal 6
Battery negative -
Terminal 5
1 @ 2Continuity
NG REPLACE FRONT DOOR LOCK ASSY LH
OK
Page 853 of 2572
B51572
Power Window Regulator
Master Switch Assy (Door ECU)
Front Door Lock Assy LH
05-1956
- DIAGNOSTICSPOWER DOOR LOCK CONTROL SYSTEM
2146 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
2 CHECK WIRE HARNESS
(a) Disconnect the master switch and door lock connector.
(b) Check the continuity between the master switch and door
lock.
Standard:
Terminals (Switch @ Door Lock)Specified condition
16 @ 1Continuity
4 @ 4Continuity
14 @ 3Continuity
NG REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
REPLACE POWER WINDOW REGULATOR MASTER SWITCH ASSY
Page 854 of 2572
F46778
ECM S27
Skid Control ECU
With Actuator
A1
A/C Ambient Temp.
SensorENG+
TA M
E2 IC4
IK3V
W-L
E524
Short Connector
S28 EB2ENG-
E5
E6
E7 R
B30
32 IC4
28 5
18
5 W-G
B-R ENG+
ENG-9
23
6
S29 55
BRBRBR
1 2
05-756
- DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
946 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
AMBIENT TEMPERATURE SENSOR CIRCUIT
CIRCUIT DESCRIPTION
The ambient temperature sensor sends the outside temperature signal to the ECM. The ECM transmits the
signal to the skid control ECU as a communication signal. The skid control ECU controls the tire pressure
warning system, depending on the changes of the outside temperature.
HINT:
The signal sent from the ambient temperature sensor is also used in the A/C.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 CHECK DIAGNOSTIC CODE OUTPUT
(a) Check if the normal code is output by air conditioning system (see page 05-1 117).
OK:
DTC is not output.
NG REPAIR CIRCUIT INDICATED BY OUTPUT
CODE
OK
05IP2-01
Page 855 of 2572
F45165F45562F45563
Wire Harness Side:
Wire Harness Side:
ENG-ENG+ENG+
ENG- S27
E5
- DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
05-757
947 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
2 CHECK HARNESS AND CONNECTOR(BRAKE ACTUATOR ASSY - ECM)
(SEE PAGE 01-36)
(a) Disconnect the brake actuator assy S27 connector and
ECM E5 connector.
(b) Measure the resistance between each terminal of brake
actuator assy and ECM wire harness side connectors.
Standard:
Tester connectionSpecified condition
S27-9 (ENG+) - E5-24 (ENG+)Below 1 W
S27-23 (ENG-) - E5-30 (ENG-)Below 1 W
(c) Measure the resistance between each terminal of the
brake actuator assy wire harness side connector and
body ground.
Standard:
Tester connectionSpecified condition
S27-9 (ENG+) - Body ground10 kW or higher
S27-23 (ENG-) - Body ground10 kW or higher
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
Page 856 of 2572

A53769
ENG- ENG+
E5
E9
E1 ECM:
F45157
GND
1 V / Division
0.5 ms / Division
Normal Signal Waveform: ENG + terminal
F45158
1 V / Division
0.5 ms / Division
Normal Signal Waveform: ENG- terminal
GND
05-758
- DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
948 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
3 INSPECT ECM(ENG+, ENG- OUTPUT)
(a) Connect the brake actuator assy S27 connector and ECM
E5 connector.
(b) Remove the ECM with the connectors connected.
(c) Turn the ignition switch to the ON position.
(d) Using an oscilloscope, connect the terminals, as shown
in the chart below.
Tester Connection
E5-24 (ENG+) - E9-1 (E1)
(e) With the engine idling, check the output waveform.
OK:
Signal waveform appears as shown in the illustration.
HINT:
As the vehicle speed increases, the waveform cycle narrows.
(f) Using an oscilloscope, connect the terminals, as shown
in the chart below.
Tester Connection
E5-30 (ENG-) - E9-1 (E1)
(g) With the engine idling, check the output waveform.
OK:
Signal waveform appears as shown in the illustration.
HINT:
As the engine speed increases, the waveform cycle narrows.
NG REPLACE ECM
OK