engine TOYOTA HIGHLANDER 2001 Service Repair Manual

H03352C81305H43424
Engine Room
Main Wire
Airbag
Sensor
Assy
CenterAirbag
Front
RH
Sensor
Cowl Wire
-SR+SR
Service Wire
A
B
C D E F
-SR+SR
A9
IK1
H03354C81305H43447
Engine Room
Main Wire
Airbag
Sensor
Assy
CenterAirbag
Front
RH
Sensor
Cowl Wire
-SR+SR
A
B
C D E F
IK1
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
05-1337
1527 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
8 CHECK ENGINE ROOM MAIN WIRE(OPEN)
(a) Disconnect the engine room main wire connector from the
cowl wire.
HINT:
Connector ºEº has already been inserted into the service wire.
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester connectionConditionSpecified condition
IK1-3 (+SR) -
IK1-4 (-SR)AlwaysBelow 1 W
NG REPAIR OR REPLACE ENGINE ROOM MAIN
WIRE
OK
REPAIR OR REPLACE COWL WIRE
9 CHECK ENGINE ROOM MAIN WIRE(TO B+)
(a) Turn the ignition switch to the LOCK position.
(b) Disconnect the negative (-) terminal cable from the bat-
tery, and wait for at least 90 seconds.
(c) Disconnect the engine room main wire connector from the
cowl wire.
(d) Connect the negative (-) terminal cable to the battery,
and wait for at least 2 seconds.
(e) Turn the ignition switch to the ON position.
(f) Measure the voltage according to the value(s) in the table
below.
Standard:
Tester connectionConditionSpecified condition
IK1-3 (+SR) -
Body groundIgnition switch ONBelow 1 V
IK1-4 (-SR) -
Body groundIgnition switch ONBelow 1 V
NG REPAIR OR REPLACE ENGINE ROOM MAIN
WIRE
OK
REPAIR OR REPLACE COWL WIRE

H03354C81305H43447
Engine Room
Main Wire
Airbag
Sensor
Assy
CenterAirbag
Front
RH
Sensor
Cowl Wire
-SR+SR
A
B
C D E F
IK1
H03354C81305H43447
Engine Room
Main Wire
Airbag
Sensor
Assy
CenterAirbag
Front
RH
Sensor
Cowl Wire
-SR+SR
A
B
C D E F
IK1
05-1338
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1528 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
10 CHECK ENGINE ROOM MAIN WIRE(TO GROUND)
(a) Disconnect the engine room main wire connector from the
cowl wire.
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester connectionConditionSpecified condition
IK1-3 (+SR) -
Body groundAlways1 MW or Higher
IK1-4 (-SR) -
Body groundAlways1 MW or Higher
NG REPAIR OR REPLACE ENGINE ROOM MAIN
WIRE
OK
REPAIR OR REPLACE COWL WIRE
11 CHECK ENGINE ROOM MAIN WIRE(SHORT)
(a) Disconnect the engine room main wire connector from the
cowl wire.
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester connectionConditionSpecified condition
IK1-3 (+SR) -
IK1-4 (-SR)Always1 MW or Higher
NG REPAIR OR REPLACE ENGINE ROOM MAIN
WIRE
OK
REPAIR OR REPLACE COWL WIRE

H02750
Airbag Sensor Assy Center
+SL
-SL 15
26 2
1 +SL
-SLA17 W-R
BRIK1
IK11 2
A17 A8
Airbag Sensor Front LH
G
R
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
DTC B1149/37 FRONT AIRBAG SENSOR (LH)
MALFUNCTION
CIRCUIT DESCRIPTION
The airbag sensor front LH circuit consists of the diagnostic circuit and the frontal deceleration sensor, etc.
If the airbag sensor assy center receives signals from the frontal deceleration sensor, it judges whether or
not the SRS should be activated.
DTC B1149/37 is recorded when a malfunction is detected in the airbag sensor front LH circuit.
DTC No.DTC Detecting ConditionTrouble Area
B1149/37

Short circuit in front airbag sensor LH wire harness (to B+)

Short circuit in front airbag sensor LH wire harness (to
ground)

Open circuit in +SL wire harness or -SL wire harness of
front airbag sensor LH

Airbag sensor front LH malfunction

Airbag sensor assy center malfunction

Airbag sensor front LH

Airbag sensor assy center

Cowl wire

Engine room main wire
WIRING DIAGRAM
05IVO-02

H03352C81305H43424
Engine Room
Main Wire
Service Wire
Airbag
Sensor
Assy
Center
Airbag Sensor
Front LH
A
B C
D E FCowl Wire
-SL+SLA8
IK1
-SL+SL
H03354C81305H43447
Engine Room
Main Wire
-SL
+SLAirbag
Sensor
Assy
Center
Airbag Sensor
Front LH
A
B C D E FCowl Wire
IK1
05-1344
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1534 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
8 CHECK ENGINE ROOM MAIN WIRE(OPEN)
(a) Disconnect the engine room main wire connector from the
cowl wire.
HINT:
Connector ºEº has already been inserted into the service wire.
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester connectionConditionSpecified condition
IK1-1 (-SL) -
IK1-2 (+SL)AlwaysBelow 1 W
NG REPAIR OR REPLACE ENGINE ROOM MAIN
WIRE
OK
REPAIR OR REPLACE COWL WIRE
9 CHECK ENGINE ROOM MAIN WIRE(TO B+)
(a) Turn the ignition switch to the LOCK position.
(b) Disconnect the negative (-) terminal cable from the bat-
tery, and wait for at least 90 seconds.
(c) Disconnect the engine room main wire connector from the
cowl wire.
(d) Connect the negative (-) terminal cable to the battery,
and wait for at least 2 seconds.
(e) Turn the ignition switch to the ON position.
(f) Measure the voltage according to the value(s) in the table
below.
Standard:
Tester connectionConditionSpecified condition
IK1-1 (-SL) -
Body groundIgnition switch ONBelow 1 V
IK1-2 (+SL) -
Body groundIgnition switch ONBelow 1 V
NG REPAIR OR REPLACE ENGINE ROOM MAIN
WIRE
OK
REPAIR OR REPLACE COWL WIRE

H03354C81305H43447
Engine Room
Main Wire
-SL
+SLAirbag
Sensor
Assy
Center
Airbag Sensor
Front LH
A
B C D E FCowl Wire
IK1
H03354C81305H43447
Engine Room
Main Wire
-SL
+SLAirbag
Sensor
Assy
Center
Airbag Sensor
Front LH
A
B C D E FCowl Wire
IK1
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
05-1345
1535 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
10 CHECK ENGINE ROOM MAIN WIRE(TO GROUND)
(a) Disconnect the engine room main wire connector from the
cowl wire.
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester connectionConditionSpecified condition
IK1-1 (-SL) -
Body groundAlways1 MW or Higher
IK1-2 (+SL) -
Body groundAlways1 MW or Higher
NG REPAIR OR REPLACE ENGINE ROOM MAIN
WIRE
OK
REPAIR OR REPLACE COWL WIRE
11 CHECK ENGINE ROOM MAIN WIRE(SHORT)
(a) Disconnect the engine room main wire connector from the
cowl wire.
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester connectionConditionSpecified condition
IK1-1 (-SL) -
IK1-2 (+SL)Always1 MW or Higher
NG REPAIR OR REPLACE ENGINE ROOM MAIN
WIRE
OK
REPAIR OR REPLACE COWL WIRE

H45686
B9
Multiplex Network Body ECU
P5
Power Window
Regulator Master
Switch Assy
(Door ECU)
A17
Airbag Sensor
Assembly F7
FL Block
Assy2 1K
1A Y
1W-L
IB1IC3
810 1G
3 1D
2
2 L
9
CPUB
IB2 WD.C.C
5
IB2 V
BatteryMPX2
BDR10
GR
8
MPX2 2A
4F
5 BR
71
MPX27 V
SB
BR
Short
Connector
2W-B
IB1
W-B
4L
4L
W-B
IC GND
S30
222 Y5 IF3
IB2
7 1 61 2I
IL1ECU-B
4AO
8 8 BR Engine Room J/B
Passenger
Side J/B 4
FL Main W33
10 Instrument
Panel J/B
MPX1
Passenger
Side J/B BG
BR2 S31 FR
Door
ALT 05-2052
- DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
2242 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
WIRING DIAGRAM

B78729
Instrument Panel
J/B Assy
21 P5
Power Window Regulator
Master Switch Assy (Door ECU)
Engine
Room
J/BPassenger Side J/B
C11
Combination Meter Assy (Meter ECU)Air conditioner
Amplifier Assy
(A/C ECU) 7
5
1K 2IMPX1
IL2 V
IB2 8
SB
W-B Short
Connector
MPX-7
4
W-B MPX- BR
G
Y4F
4A
2
9 2A
1
IB F7
FL Block
AssyBR W-L
5
IC3
12
11
Battery13 3J
3E6 2
+BGND
123J
3F Center J/B 2
1
FL MAINS31
A11
A10
A10
G A1012
W
1 1G 10
1 3
WW
D.C.C.ECU-B
R
MPX+
Center
J/B
- DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
05-2071
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: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
WIRING DIAGRAM

H45692
T4
Theft Warning ECU Assy
(Theft Deterrent ECU)
A10
Air Conditioner
Amplifier Assy
(A/C ECU) F7
FL Block AssyEngine Room J/B
Combination
Meter 1 41D9
MPX1
21 1G10
BR
2A
2I SECURITYW-L3 IC3
BatteryJ17
J/C
1ECU-B
MPX- 3H V IF1
35
Y31
Center
J/B
3E 3J L
+B2
+B1
2 O
IL1112
W 4
L
P P
IC3 5
52A
D.C.C.
W
FL Main WMPX-C11
G53D
3F 11213
9W-B
IB 29
W-B EEE Instrument
Panel J/B 05-2076
- DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
2266 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
WIRING DIAGRAM

I38769
ECM
LCK1 23
E9 W-L
A2
Cooler
Compressor
Assy
J7
J/C 1
2
A
ABR
BR (*2)
ED
EEBR (*1)
*1: 3MZ-FE
*2: 2AZ-FE 05-1 146
- DIAGNOSTICSAIR CONDITIONING SYSTEM
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:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
DTC B1422/22 COMPRESSOR LOCK SENSOR CIRCUIT
CIRCUIT DESCRIPTION
The ECM and A/C amplifier communicate via BEAN.
This sensor sends 4 pulses per engine revolution to the ECM.
If the number ratio of the compressor speed divided by the engine speed is smaller than a predetermined
value, the ECM turns the compressor OFF. And the indicator flashes at about 1 second intervals.
DTC No.Detection ItemTrouble Area
All conditions below are detected for 3 secs or more

Cooler compressor assy (A/C magnetic clutch and lock sen-
sor)


Cooler compressor assy drive belt
B1422/22
All conditions below are detected for 3 secs. or more
(c) Engine speed: 450 rpm or more
(d) Ratio between engine and compressor speed deviates
20 % or more in comparison to normal operation

Cooler com ressor assy drive belt

Cooler compressor assy lock sensor

Harness and connector between cooler compressor assy and
ECM
20 % or more in comparison to normal operation.ECM

Multiplex communication circuit

ECM

A/C amplifier assy
WIRING DIAGRAM
05ITW-01

I38774
ECM Connector Wire
Harness View:
LCK1
E9
le32E05280
Cooler Compressor Assy Connector
Front View:
A2
- DIAGNOSTICSAIR CONDITIONING SYSTEM
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: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
INSPECTION PROCEDURE
1 INSPECT ECM(LCK1)
(a) Remove the ECM with connectors still connected.
(b) Measure the voltage according to the value(s) in the table
below.
Standard:
Tester connectionConditionSpecified condition
E9-23 (LCK1) - Body
groundStart engine A/C, switch
AUTOPulse generation
OK PROCEED TO NEXT CIRCUIT INSPECTION
SHOWN IN PROBLEM SYMPTOMS TABLE(SEE
PAGE 05-1 129)
NG
2 INSPECT COOLER COMPRESSOR ASSY
(a) Disconnect the cooler compressor assy connector.
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester connectionConditionSpecified condition
A2-1 - A2-2at 205C (685F)165 to 205 W
NG REPLACE COOLER COMPRESSOR ASSY
OK