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 05-2126
- DIAGNOSTICSCAN COMMUNICATION SYSTEM
2316 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
CHECK CAN BUS LINE (CAN-H) 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 6
(CANH) of the DLC3.
SymptomTrouble Area
There is continuity between terminals 4 (CG) and 6 (CANH)
of DLC3.

Short to GND in CAN bus line (CANH)

Skid control ECU

Steering sensor

Yaw rate sensor
WIRING DIAGRAM
05IR6-03

C81825
12345678
9 10111213141516
G25474G26206
DLC3:
CANH CGD3
C81825
12345678
9 10111213141516
G25474G26206
DLC3:
CANH CGD3
C81825
12345678
9 10111213141516
G25474G26206
DLC3:
CANH CGD3
05-2128
- DIAGNOSTICSCAN COMMUNICATION SYSTEM
2318 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
3 CHECK CAN BUS LINE FOR SHORT TO GND(SKID CONTROL ECU, CAN-H)
(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) -
D3-6 (CANH)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-H)
(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) -
D3-6 (CANH)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 SENSOR, CAN-H)
(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) -
D3-6 (CANH)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:CANH
S27
GND1
- DIAGNOSTICSCAN COMMUNICATION SYSTEM
05-2129
2319 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
6 CHECK CAN BUS LINE FOR SHORT TO GND(SKID CONTROL ECU - JUNCTION
CONNECTOR, CAN-H)
(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
S27-1 1 (CANH) -
S27-32 (GND1)Ignition SW OFF1 MW or more
NG REPAIR OR REPLACE CAN MAIN BUS LINE OR
CONNECTOR (SKID CONTROL ECU - JUNC-
TION CONNECTOR, CAN-H)
OK

G24991G26210
S14
Steering Sensor Wire Harness View:
CANHESS
05-2130
- DIAGNOSTICSCAN COMMUNICATION SYSTEM
2320 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
7 CHECK CAN BUS LINE FOR SHORT TO GND(STEERING SENSOR - JUNCTION
CONNECTOR, CAN-H)
(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) -
S14-10 (CANH)Ignition SW OFF1 MW or more
HINT:
Check the wire harness connector connected to the junction
connector while disconnecting it.
NG REPAIR OR REPLACE CAN MAIN BUS LINE OR
CONNECTOR (STEERING SENSOR - JUNC-
TION CONNECTOR, CAN-H)
OK
REPAIR OR REPLACE YAW RATE SENSOR SUB BUS LINE OR CONNECTOR (CAN-H)

G30957
S14
Steering Sensor
CANL CANH
10
9CANL CANH J16
J/CSkid Control ECU
with Actuator
Y1
Yaw Rate Sensor
Passenger Side J/B D3
DLC3
Instrument Panel J/B
FL MAIN
BatteryF7
FL Block
ALT 1
2 CANL CANH
3
2
CANL CANH
6
14
CG
4
BAT
16Y
W10
21
B
WG
W 12
IO2
IO29
20
B
W
W-B
W22 11STRGVSC
VSC
STRG
YAW
YAW
DLC3
DLC3
4C 4N1 6
W-B
10
1E 1A1 OBD
B
IC 8
19L
W12
IC4
IC413B
W11
S27
S2725
13
W 05-2102
- DIAGNOSTICSCAN COMMUNICATION SYSTEM
2292 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
CHECK CAN BUS LINE
CIRCUIT DESCRIPTION
When any DTC for the CAN communication is output, first measure the resistance between the terminals
of DLC3 to specify the trouble area.
WIRING DIAGRAM
05DY5-04

05MOJ-01
TLT CID Description of Test ValueUnit Conversion Description of Test Limit
Multiply by 0.625 and
subtract 40 [C]ECT sensor output when estimated ECT
has reached to malfunction criterionMalfunction criterion for thermostat 1 $01 05-24
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
214 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
CHECKING MONITOR STATUS
NOTICE:
The monitor status (mode 6) is not applicable to the heated oxygen sensor (HO2S). However, HO2S
test values can be checked by O2S TEST RESULT (mode 5). Refer to page 05-22
1. Outline
The monitor results and the test values can be checked with the OBDII scan tool.
The engine control module (ECM) monitors the emissions-related components as the thermostat, catalyst
converter and evaporative emissions (EVAP), and determines whether they are functioning normally or not.
When finished monitoring, the ECM stores the monitor results and the test values.
The monitor result indicates whether the component is functioning normally or not. The test value is the value
that was used to determine the monitor result. If the test value is outside the test limit (malfunction criterion),
the ECM determines the component is malfunctioning. Some emissions-related components have multiple
test values to determine monitor result. If one of these test values is outside test limit, the ECM determines
the component is malfunctioning.
2. Description
The test value and test limit information are described as shown in the following table. This information is
included under ºMONITOR RESULTº in the emissions-related DTC sections:
TID $08: Thermostat

TID (Test Identification Data) is assigned to each emissions-related component.

TLT (Test Limit Type):
If TLT is 0, the component is malfunctioning when the test value is higher than the test limit.
If TLT is 1, the component is malfunctioning when the test value is lower than the test limit.

CID (Component Identification Data) is assigned to each test value.

Unit Conversion is used to calculate the test value indicated on generic OBDII scan tools.

E74082
Multiplex Communication System
Power Window Master SW with ECUBody ECU
D12
Door Key Lock and Unlock SW Front LH
Door Lock Motor Front LH
Door Unlock Detection SW
Front LH
D13
Door Key Lock and Unlock
SW Front RH
Door Lock Motor Front RH
Door Unlock Detection
SW Front RHD14
Door Lock Motor Rear LH
Door Unlock Detection SW
Rear LHB15
Back Door Lock Motor
Back Door Unlock
Detection SWD15
Door Lock Motor
Rear RH
Door Unlock Detection
SW Rear RH
Passenger Side J/B
Instrument Panel J/B7
P5
16
P5
3
P58
P5 IB21
GR Y5
IF3O6
B10 MPX1
10
B9
11
B10
17
B12MPX2
LSWP
LSWA LSSR
E1
2BR
LGBR
3
IA1
15
BH1B
BR7
BC1
GR
4
LSSR
E V
4
S
E
3 8
BG3 B A
AA A
BB
B J12
J/C
BB1 6
1GR
LSSR
E LSSR
E
56 BRIN22
W-B2
IN1W-B
IAW-B4L 10
4M6
14
1D4
1EW-BW-B
BB1
11
W-B
BAJ14
J/CA
BE13 BC1W-B
BB MPX1
MPX2
LSW
LSWE
23
W-B
W-B 05-1604
- DIAGNOSTICSLIGHTING SYSTEM
1794 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
DOOR LOCK POSITION CIRCUIT
CIRCUIT DESCRIPTION
This circuit detects the state of the door lock detection sensor and sends it to the multiplex network body
ECU.
WIRING DIAGRAM
05IQF-02

05ESI-05
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
05-1
191 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
SFI SYSTEM (2AZ-FE)
DEFINITION OF TERMS
TermDefinition
Monitor descriptionDescription of what the ECM monitors and how it detects malfunctions (monitoring purpose and its details).
Related DTCsA group of diagnostic trouble codes that are output by the ECM based on the same malfunction detection logic.
Typical enabling condition
Preconditions that allow the ECM to detect malfunctions.
With all preconditions satisfied, the ECM sets the DTC when the monitored value(s) exceeds the malfunction
threshold(s).
Sequence of operation
The priority order that is applied to monitoring, if multiple sensors and components are used to detect the malfunc-
tion.
When a sensor is being monitored, the next sensor or component will not be monitored until the current sensor
monitoring is finished.
Required sensor/compo-
nentsThe sensors and components that are used by the ECM to detect malfunctions.
Frequency of operation
The number of times that the ECM checks for malfunctions per driving cycle.
ºOnce per driving cycleº means that the ECM detects the malfunction only one time during a single driving cycle.
ºContinuousº means that the ECM detects the malfunction every time an enabling condition is met.
DurationThe minimum time that the ECM must sense a continuous deviation in the monitored value(s) before setting a
DTC. This timing begins after the ºtypical enabling conditionsº are met.
Malfunction thresholdsBeyond this value, the ECM will conclude that there is a malfunction and set a DTC.
MIL operation
MIL illumination timing after a defect is detected.
ºImmediateº means that the ECM illuminates the MIL the instant the ECM determines that there is a malfunction.
º2 driving cyclesº means that the ECM illuminates the MIL if the same malfunction is detected again in the 2nd
driving cycle.