2001 TOYOTA HIGHLANDER o2 sensor

G30963
IC4
S27 W Y
WG
W BWL
WB
CANL CANH
CANLCANH
CANL CANH
CANL CANHESS S14
Steering SensorJ16
J/CSkid Control ECU
With Actuator
D3
DLC31011
12
1325
2
146 9S27 S27
IC4
3
11
22 10
218
19
Y1
Yaw Rate Sensor
W BIO213 IO212
9
20VSC
STRG
VSC
STRG
YAW
DLC3S27 12
W-B
W-B
W-B1
32GND2
GND1
4 CGW-BW-B
W-B1
1 1
1 3 6
4C
4C 4N4N
W-B Passenger Side J/B
J19
J/C
W-BJ4
J/C
AAA
BF
ICEH
EB GNDYAW
DLC3
- DIAGNOSTICSCAN COMMUNICATION SYSTEM
05-2131
2321 Author
: Date
:
CHECK CAN BUS LINE (CAN-L) FOR SHORT TO GND
CIRCUIT DESCRIPTION
A short to GND is suspected in the CAN bus line when there is continuity between terminals 4 (CG) and 14
(CANL) of the DLC3.
SymptomTrouble Area
There is continuity between terminals 4 (CG) and 14
(CANL) of DLC3.

Short to GND in CAN bus line (CANL)

Skid control ECU

Steering sensor

Yaw rate sensor
WIRING DIAGRAM
05IR7-02

C81825
12345678
9 10111213141516
G25474G26206
DLC3:
CG
CANLD3
C81825
12345678
9 10111213141516
G25474G26206
DLC3:
CG
CANLD3
C81825
12345678
9 10111213141516
G25474G26206
DLC3:
CG
CANLD3
- DIAGNOSTICSCAN COMMUNICATION SYSTEM
05-2133
2323 Author
: Date
:
3 CHECK CAN BUS LINE FOR SHORT TO GND(SKID CONTROL ECU, CAN-L)
(a) Disconnect the connector (S27) from the skid control
ECU.
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester connectionConditionSpecified value
D3-4 (CG) -
D3-14 (CANL)Ignition SW OFF3 kW or more
OK REPLACE SKID CONTROL ECU WITH
ACTUATOR (SEE PAGE 32-37)
NG
4 CHECK CAN BUS LINE FOR SHORT TO GND(STEERING SENSOR, CAN-L)
(a) Reconnect the connector (S27) to the skid control ECU.
(b) Disconnect the connector (S14) from the steering sensor.
(c) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester connectionConditionSpecified value
D3-4 (CG) -
D3-14 (CANL)Ignition SW OFF3 kW or more
OK REPLACE STEERING SENSOR
(SEE PAGE 32-48)
NG
5 CHECK CAN BUS LINE FOR SHORT TO GND(YAW RATE SWENSOR, CAN-L)
(a) Reconnect the connector (S14) to the steering sensor.
(b) Disconnect the connector (Y1) from the yaw rate sensor.
(c) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester connectionConditionSpecified value
D3-4 (CG) -
D3-14 (CANL)Ignition SW OFF3 kW or more
OK REPLACE YAW RATE SENSOR
(SEE PAGE 32-46)
NG

G25476G26430
Junction Connector:
J16
CANH
CANL
E69126
Skid Control ECU
Connector Front
View:
CANL
S27
GND1
05-2134
- DIAGNOSTICSCAN COMMUNICATION SYSTEM
2324 Author
: Date
:
6 CHECK CAN BUS LINE FOR SHORT TO GND(SKID CONTROL ECU - JUNCTION
CONNECTOR, CAN-L)
(a) Reconnect the connector (Y1) to the yaw rate sensor.
(b) Disconnect the wire harness connector (J16) from the
junction connector.
(c) Disconnect the connector (S27) from the skid control
ECU.
(d) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester connectionConditionSpecified value
S27-25 (CANL) -
S27-32 (GND1)Ignition SW OFF1 MW more
NG REPAIR OR REPLACE CAN MAIN BUS LINE OR
CONNECTOR (SKID CONTROL ECU - JUNC-
TION CONNECTOR, CAN-L)
OK

G24991G26210
S14
Steering Sensor Wire Harness View:
CANLESS
- DIAGNOSTICSCAN COMMUNICATION SYSTEM
05-2135
2325 Author
: Date
:
7 CHECK CAN BUS LINE FOR SHORT TO GND(STEERING SENSOR - JUNCTION
CONNECTOR, CAN-L)
(a) Disconnect the connector (S14) from the steering sensor.
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester connectionConditionSpecified value
S14-2 (ESS) -
S14-9 (CANL)Ignition SW OFF1 MW more
HINT:
Check the wire harness connector connected to the junction
connector while disconnecting them.
NG REPAIR OR REPLACE CAN MAIN BUS LINE OR
CONNECTOR (STEERING SENSOR - JUNC-
TION CONNECTOR, CAN-L)
OK
REPAIR OR REPLACE YAW RATE SENSOR SUB BUS LINE OR CONNECTOR (CAN-L)

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