o2 sensor TOYOTA HIGHLANDER 2001 Service Repair Manual

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

I30155
Ambient Temperature Sensor:
A1
I38777
Temperature (
C) 3.5
3.0
2.5
2.0
1.5
1.0
5.0
0.0
40 0
20 60 Resistance
(kW)4.0

C

F 104 68 140MIX
MAX
- DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
05-759
949 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
4 INSPECT AMBIENT TEMPERATURE SENSOR
(a) Remove the ambient temperature sensor and disconnect
the A1 connector.
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester connectionConditionSpecified condition
A1-1 - A1-250
F (10
C)3.00 to 3.73 kW
A1-1 - A1-259
F (15
C)2.45 to 2.88 kW
A1-1 - A1-268
F (20
C)1.95 to 2.30 kW
A1-1 - A1-277
F (25
C)1.60 to 1.80 kW
A1-1 - A1-286
F (30
C)1.28 to 1.47 kW
A1-1 - A1-295
F (35
C)1.00 to 1.22 kW
A1-1 - A1-2104
F (40
C)0.80 to 1.00 kW
A1-1 - A1-211 3
F (45
C)0.65 to 0.85 kW
A1-1 - A1-2122
F (50
C)0.50 to 0.70 kW
A1-1 - A1-2131
F (55
C)0.44 to 0.60 kW
A1-1 - A1-2140
F (60
C)0.36 to 0.50 kW
HINT:
As the temperature increases, the resistance decreases (see
the chart below).
NOTICE:
Even slightly touching the sensor may change the resis-
tance value. Be sure to hold the connector of the sensor.
NG REPLACE AMBIENT TEMPERATURE SENSOR
OK

F46780
A1
Wire harness side:
E7
Wire harness side:
E2
TA ME6
05-760
- DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
950 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
5 CHECK HARNESS AND CONNECTOR(ECM - AMBIENT TEMPERATURE SENSOR)
(SEE PAGE 01-36)
(a) Disconnect the ECM E6 and E7 connectors.
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester connectionConditionSpecified condition
E6-32 (TAM) - A1-2AlwaysBelow 1 W
E7-28 (E2) - A1-1AlwaysBelow 1 W
E6-32 (TAM) - Body
groundAlways10 kW or higher
E7-28 (E2) - Body
groundAlways10 kW or higher
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
REPLACE ECM (SEE PAGE 10-9 OR 10-24)

I39094
I38228
- DIAGNOSTICSNAVIGATION SYSTEM
05-1813
2003 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
VEHICLE POSITION MARK DEVIATES GREATLY
INSPECTION PROCEDURE
1 CHECK THE GPS MARK
(a) Check that the GPS mark is displayed.
OK:The GPS mark is displayed.
NG GO TO ºGPS MARK IS NOT DISPLAYEDº IN THE
FLOW CHART (SEE PAGE 05-1818)
OK
2 NAVIGATION CHECK MODE(VEHICLE SENSORS)
(a) Enter the ºNavigation Checkº mode (Vehicle Sensors) (see page 05-1765).
(b) While driving, compare the ºSPDº indicator to the reading
on the speedometer. Check that these readings are al-
most the same.
OK: The readings are almost the same.
NG GO TO ºSPEED SIGNAL CIRCUIT (NAVIGATION
ECU - COMBINATION METER ASSY)º IN THE
FLOW CHART (SEE PAGE 05-1838)
OK
05ISM-02

I38228
05-1814
- DIAGNOSTICSNAVIGATION SYSTEM
2004 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
3 NAVIGATION CHECK MODE(VEHICLE SENSORS)
(a) Move the shift lever to the R or P position.
Standard:
Shift leverDisplay
POFF
RON
HINT:
The display is updated once per second. As a result, it is normal
for the display to lag behind the actual change in the switch.
NG GO TO ºREVERSE SIGNAL CIRCUITº IN THE
FLOW CHART (SEE PAGE 05-1844)
OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
(SEE PAGE 05-1778)

I38584
I38228
05-1816
- DIAGNOSTICSNAVIGATION SYSTEM
2006 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
VEHICLE POSITION MARK IS NOT UPDATED
INSPECTION PROCEDURE
1 CHECK THE MAP DISC
(a) Check that the map disc is not deformed or cracked.
OK: No deformations or cracks appear on the map
disc.
NG REPLACE THE MAP DISC
OK
2 CHECK THE MAP DISPLAY
(a) Check if a touch scroll can be performed on the map display.
OK: Touch scroll can be performed.
NG PROCEED TO NEXT CIRCUIT INSPECTION
SHOWN IN PROBLEM SYMPTOMS TABLE
(SEE PAGE 05-1778)
OK
3 NAVIGATION CHECK MODE(VEHICLE SENSORS)
(a) Enter the ºNavigation Checkº mode (Vehicle Sensors) (see page 05-1765).
(b) While driving, compare the ºSPEEDº indicator to the read-
ing on the speedometer. Check if these readings are al-
most the same.
OK: The readings are almost the same.
NG GO TO ºSPEED SIGNAL CIRCUIT (NAVIGATION
ECU - COMBINATION METER ASSY)º IN THE
FLOW CHART (SEE PAGE 05-1838)
OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
(SEE PAGE 05-1778)
05ISO-02

I38228
- DIAGNOSTICSNAVIGATION SYSTEM
05-1825
2015 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
GYRO ERROR
INSPECTION PROCEDURE
1 NAVIGATION CHECK MODE(VEHICLE SENSORS)
(a) Enter the ºNavigation Checkº mode (Vehicle Sensors) (see page 05-1765).
(b) Check the gyro voltage.
Standard: 0.1 to 4.5 V
NG REPLACE NAVIGATION ECU
(SEE PAGE 67-9)
OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN DIAGNOSTIC TROUBLE CODE CHART
(SEE PAGE 05-1791)
05ISU-02

I38228
- DIAGNOSTICSNAVIGATION SYSTEM
05-1827
2017 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
SPEED SIGNAL ERROR
INSPECTION PROCEDURE
1 NAVIGATION CHECK MODE(VEHICLE SENSORS)
(a) Enter the ºNavigation Checkº mode (Vehicle Sensors) (see page 05-1765).
(b) While driving, compare the ºSPDº indicator to the reading
on the speedometer. Check if these readings are almost
the same.
OK: The readings are almost the same.
OK REPLACE NAVIGATION ECU
(SEE PAGE 67-9)
NG
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN DIAGNOSTIC TROUBLE CODE CHART
(SEE PAGE 05-1791)
05ISW-02

H43063
Airbag Sensor Assy Center
D Squib
A20
Spiral Cable
Sub-assyY Y-B
D+
D- 1
A17
2
A1713 14
D2+
D2- A17
A1717 16 2
1
4
3 1
2Y-R
Y-G
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
05-1233
1423 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
DTC B0100/13 SHORT IN D SQUIB CIRCUIT
CIRCUIT DESCRIPTION
The D squib circuit consists of the airbag sensor assy center, the spiral cable sub-assy and the horn button
assy.
The circuit instructs the SRS to deploy when deployment conditions are met.
DTC B0100/13 is recorded when a short circuit is detected in the D squib circuit.
DTC No.DTC Detecting ConditionTrouble Area
B0100/13

Short circuit between D+ wire harness and D- wire har-
ness of D squib

D squib malfunction

Spiral cable sub-assy malfunction

Airbag sensor assy center malfunction
Horn button assy (D squib)

Spiral cable sub-assy

Airbag sensor assy center

Cowl wire
WIRING DIAGRAM
0525D-05

H01001
C89244H41475
D SquibAirbag
Sensor
Assy
CenterSpiral
Cable
Sub-assy
D+
D-
Color: Black
A
B
C D
E F
05-1234
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1424 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
INSPECTION PROCEDURE
1 CHECK CONNECTOR
(a) Turn the ignition switch to the LOCK position.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) Disconnect the connectors from the horn button assy.
(d) Check that the spiral cable sub-assy connectors (on the horn button assy side) are not damaged.
OK:
The lock button is not disengaged, or the claw of the lock is not deformed or damaged.
NG REPLACE SPIRAL CABLE SUB-ASSY
(SEE PAGE 60-26)
OK
2 CHECK D SQUIB CIRCUIT(AIRBAG SENSOR ASSY CENTER - HORN BUTTON
ASSY)
(a) Disconnect the connector from the airbag sensor assy
center.
(b) Release the activation prevention mechanism built into
connector ºBº (see page 05-1207).
(c) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester connectionConditionSpecified condition
D+ - D-Always1 MW or Higher
NG Go to step 5
OK