TOYOTA HIGHLANDER 2001 Service Repair Manual

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
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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.

MONITOR RESULT
CATALYST#1 B1 . INCMP
CATALYST#1 B2 . INCMP
O2S HEAT B1S1 . INCMP
O2S HEAT B1S2 . INCMP
O2S HEAT B2S1 . INCMP
O2S HEAT B2S2 . INCMP
THERMOSTAT . . . . . PASS
Press [ENTER] to
Select the Label .
A82674
Thermostat malfunction
VAL. . . . . . . . . . . . . . 119.375C
LMT. . . . . . . . . . . . . . . 75.000C
TLT. . . . . . . . . . . . . . . . . . . . . . 1
[HELP] to notice
[EXIT] to return
A82675
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
3. Procedure (using hand-held tester)
(a) Connect the hand-held tester to the DLC3.
(b) Turn the ignition switch and hand-held tester ON.
(c) Clear DTCs.
(d) Allow the vehicle to drive, in accordance with the applicable drive pattern described in the READINESS
MONITOR DRIVE PATTERN section (see page 05-26).
(e) Select the hand-held tester menus: DIAGNOSIS, EN-
HANCED OBDII, MONITOR INFO and MONITOR RE-
SULT. The monitor result appears after the component
name.

INCMP indicates the component has not been monitored
yet.

PASS indicates the component is functioning normally.

FAIL indicates the component is malfunctioning.
(f) Select the component and press ENTER. If the monitor
result has been PASS or FAIL, the accuracy test value ap-
pears.

VAL indicates the test value.

LMT indicates the test limit (malfunction criterion).

TLT indicates the test limit type.
(g) Compare the test value with the test limit.

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.

If the test value is on the borderline of the test limit, a mal-
function is concealed in the component.
HINT:
The monitor result might on rare occasions be PASS even if the
malfunction indicator lamp (MIL) is illuminated. This indicates
the system malfunctioned on a previous driving cycle. This
might be caused by an intermittent problem.

05ESK-05
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
CHECK FOR INTERMITTENT PROBLEMS
Hand-held tester only:
Inspect the vehicle's ECM using check mode. Intermittent problems are easier to detect when the
ECM is in check mode with the hand-held tester. In check mode, the ECM uses 1 trip detection logic,
which has a higher sensitivity to malfunctions than normal mode (default), which uses 2 trip detec-
tion logic.
(a) Clear the DTCs (see page 05-38).
(b) Set the check mode (see page 05-40).
(c) Perform a simulation test (see page 01-26).
(d) Check the connector and terminal (see page 01-36).
(e) Wiggle the harness and the connector (see page 01-36).

05ITD-02
A80020
Hand-held Tester
DLC3
A76900
ON
OFF
0.13 seconds0.13 seconds 05-40
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
230 Author
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
CHECK MODE PROCEDURE
HINT:
Hand-held tester only:
Check mode has a higher sensitivity to malfunctions and can
detect malfunctions that normal mode cannot detect. Check
mode can also detect all the malfunctions that normal mode can
detect.
1. CHECK MODE PROCEDURE (Using the hand-held
tester)
(a) Make sure that the items below are true:
(1) Battery positive voltage 11 V or more
(2) Throttle valve fully closed
(3) Transmission in the P or N position
(4) A/C switched OFF
(b) Turn the ignition switch OFF.
(c) Connect the hand-held tester to the DLC3.
(d) Turn the ignition switch ON.
(e) Change the ECM to check mode with the hand-held tes-
ter. Enter the following menus: DIAGNOSIS / EN-
HANCED OBD II / CHECK MODE. Make sure the MIL
flashes as shown in the illustration.
NOTICE:
All DTCs and freeze frame data recorded will be erased if:
1) the hand-held tester is used to change the ECM from
normal mode to check mode or vice-versa; or 2) during
check mode, the ignition switch is turned from ON to ACC
or OFF.
(f) Start the engine. The MIL should turn off after the engine
starts.
(g) Simulate the conditions of the malfunction described by
the customer.
(h) After simulating the malfunction conditions, use the
hand-held tester diagnosis selector to check the DTC,
freeze frame data and other data.
(1) After checking the DTC, inspect the applicable cir-
cuit.

P
A90343
A80017
A91474
Engine Room J/B
ETCS EFI NO. 1
Engine Room R/B No. 2
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
05-41
231 Author
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
2. CLEAR DTC (Using the OBD II scan tool or hand-held
tester)
(a) Connect the OBD II scan tool or the hand-held tester to
the DLC3.
(b) Turn the ignition switch ON.
(c) Erase DTCs and freeze frame data with the OBD II scan
tool (complying with SAE J1978) or the hand-held tester.
For the hand-held tester: 1) enter the following menus:
DIAGNOSIS / ENHANCED OBD II / DTC INFO / CLEAR
CODES; and 2) press YES. For the OBD II scan tool, see
its instruction manual.
3. CLEAR DTC (Not using the OBD II scan tool or hand-
held tester)
(a) Remove the EFI NO. 1 fuse from the engine room J/B and
ETCS fuse from the engine room R/B No. 2 for more than
60 seconds.
Or, disconnect the battery cable for more than 60 se-
conds. After disconnecting the battery terminal, perform
the ºINITIALIZEº procedure (see page 05-893).

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
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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

E74383
P5
Power Window Master SW with ECU
Connector Front View:
E74263
Multiplex Network Body ECU
Connector Front View:
B12B10
B12-17B10-1 1
- DIAGNOSTICSLIGHTING SYSTEM
05-1605
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
INSPECTION PROCEDURE
HINT:
Inspect if the door lock system is normal before performing this procedure.
1 CHECK HARNESS AND CONNECTOR(FRONT DOOR LOCK POSITION CIRCUIT)
(a) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester connectionConditionSpecified condition
P5-3 - P5-16Driver side door is locked.10 to 14 V
P5-3 - P5-16Driver side door is
unlocked.Below 1 V
NG GO TO POWER DOOR LOCK CONTROL
SYSTEM (SEE PAGE 05-1935)
OK
2 CHECK HARNESS AND CONNECTOR(PASSENGER AND REAR DOOR LOCK
POSITION CIRCUIT)
(a) Measure the voltage according to the value(s) in the table below.
Standard:
Tester connectionConditionSpecified condition
B10-1 1 - Body groundPassenger side door is locked.
Passenger side door is unlocked.10 to 14 V
Below 1 V
B12-17 - Body groundRear doors and back door are locked.
One of the rear doors or back door is unlocked.10 to 14 V
Below 1 V
NG GO TO POWER DOOR LOCK CONTROL
SYSTEM (SEE PAGE 05-1935)
OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
(SEE PAGE 05-1538)

I40822
To Multiplex Network
Body ECU
To HEAD Relay Headlamp LH (Hi) Headlamp RH (Hi) DRL No.2 Relay
DRL No.3 Relay
DRL No.4
Relay When Daytime Running Light
System is Operated: 05-1562
- DIAGNOSTICSLIGHTING SYSTEM
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
DRL RELAY CIRCUIT
CIRCUIT DESCRIPTION
The multiplex network body ECU controls DRL No.2, No.3 and No.4 relays.
The headlamp (High) is connected in serial when the daytime running light system operates.
05ETR-02

I40823
To Multiplex Network
Body ECU
To HEAD Relay Headlamp LH (Hi) Headlamp RH (Hi) DRL No.2 Relay
DRL No.3 Relay
DRL No.4
Relay When HI Beam or Flash is
Operated:
- DIAGNOSTICSLIGHTING SYSTEM
05-1563
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
The headlamp (High) is connected in parallel when the HI BEAM or FLASH operates.

E74077
Engine Room R/B No.3
Body ECU
Engine Room R/B
H4
Headlamp RH (Low Beam)
H3
Headlamp RH (High Beam)H2
Headlamp LH (Low Beam)
H1
Headlamp LH (High Beam)Engine Room R/B No.3
DRL No.4 Relay
Engine Room J/B
H-LP RH UPR H-LP LH UPR
HEAD LAMP RelayDRL No.3 Relay DRL No.2 Relay
HRLY
DRL
MAIN
FL MAIN Battery R-B R-B
R-B
L-W
L-W
L-Y
R-W
R-WW-BL-R
R-Y
R-W
W-B
W-B
W-B
R-W
W-B
J1
J/C J3
J/C
W
13WEB EA EG F7
FL BlockA A16
IK3B2
B11
1
2I1
2BP
1 2 2
3 1
4 5
2F
4
2G2
2F 1
2R32
15 3
3
3 3 1
212
R-L31
2 12 222
12 IK34
R
B113
H-LP RH LWR H-LP LH LWR B
B
B 3
3
3
3
31
3
2
1
53
3
3
3
3 2
5
1
2
3
4 DRL 05-1564
- DIAGNOSTICSLIGHTING SYSTEM
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
WIRING DIAGRAM