engine TOYOTA HIGHLANDER 2001 Service Repair Manual

I40669
Pressure Switch Connector
Wire Harness View:
A3
05-1 150
- DIAGNOSTICSAIR CONDITIONING SYSTEM
1340 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
INSPECTION PROCEDURE
1 INSPECT REFRIGERANT PRESSURE
(a) Set the manifold gauge.
(b) Read the manifold gauge pressure when these conditions are established.
Test conditions:

Temperature at the air inlet with the switch set at RECIRC is 30 to 35°C (86 to 95°F)

Engine running at 1,500 rpm

Blower speed control switch at ºHIº position

Temperature control dial at ºCOOLº position

Air conditioning switch ON

Fully open doors
Standard:
Pressure on high pressure side:
1.37 to 1.57 MPa (13.9 to 16.0 kgfVcm
2, 198 to 228 psi)
HINT:
If the refrigerant pressure is below 196 KPa (2.0 kgfVcm
2, 28 psi), the refrigerant amount in the air condition-
ing cycle may have decreased significantly for reasons such as a gas leakage.
NG INSPECT AND REPAIR AIR CONDITIONING
CYCLE
OK
2 CHECK AIR CONDITIONING OPERATION
(a) Disconnect the pressure switch connector.
(b) Connect terminals 1 and 4 of the connector of the pres-
sure switch on the vehicle wire harness side using a ser-
vice wire.
(c) Start the engine.
(d) Turn the air conditioning switch on and check that the
magnet clutch is turned on.
(e) Check that the magnet clutch is turned off when discon-
necting terminals 1 and 4 (that are connected in the prior
step).
OK:
Terminals 1 and 4 connected: magnet clutch is on
Terminals 1 and 4 disconnected: magnet clutch is off
NG Go to step 3
OK
REPLACE PRESSURE SWITCH

- DIAGNOSTICSAIR CONDITIONING SYSTEM
05-1 165
1355 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
INSPECTION PROCEDURE
1 PERFORM ACTUATOR CHECK
(a) Warm up engine.
(b) Set to actuator check mode (see page 05-1 117).
(c) Press the DEF switch and change it to step operation
(d) Press the DEF switch and check that the air flow by hand.
Display codeAir flow condition
0FACE
1FACE
2FACE
3FACE
4FACE
5B/L
6FOOT
7FOOT
8FOOT/DEF
9DEF
OK:
Air flow position changes in accordance with each
display code.
Result:
NGA
OK
(Checking from the PROBLEM SYMPTOMS TABLE)B
OK (Checking from the DTC)C
B PROCEED TO NEXT CIRCUIT INSPECTION
SHOWN IN PROBLEM SYMPTOMS TABLE (SEE
PAGE 05-1 129)
C REPLACE AIRCONDITIONER AMPLIFIER ASSY
A

05ESL-05
05-10
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
200 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
BASIC INSPECTION
When the malfunction is not confirmed in the DTC check, troubleshooting should be carried out in all the
possible circuits considered as possible causes of the problem. In many cases, by carrying out the basic
engine check shown in the following flowchart, the problem can be found quickly and efficiently. Therefore,
using this check is essential in the engine troubleshooting.
1 CHECK BATTERY VOLTAGE
NOTICE:
Carry out the battery voltage check with the engine stopped and ignition switch OFF.
OKNG
Voltage11 V or moreLess than 11 V
NG CHARGE OR REPLACE BATTERY
OK
2 CHECK IF ENGINE WILL CRANK
NG PROCEED TO PROBLEM SYMPTOMS TABLE
ON PAGE 05-31
OK
3 CHECK IF ENGINE STARTS
NG Go to step 7
OK
4 CHECK AIR FILTER
Visually check if the air filter is contaminated with dirty or oily.
NG CLEAN OR REPLACE
OK
5 CHECK IDLE SPEED (See page 14-1)
NG PROCEED TO PROBLEM SYMPTOMS TABLE
ON PAGE 05-31
OK
6 CHECK FUEL PRESSURE (See page 11-4)
NG PROCEED TO PAGE 11-4 AND CONTINUE TO
TROUBLESHOOT
OK

G30962
1E
1G
2I2A IC4
S27 W Y
B WG
W BWL
WB
CANL CANH
CANLCANH
CANLCANH
CANL CANH BAT S14
Steering SensorJ16
J/CSkid Control ECU
With Actuator
D3
DLC310
311 12
1325
2
146
14
31 2 3 9
1
+BS Instrument Panel J/B
F7
FL BlockEngine Room J/BOBD
ECU-B
ALTBR
W-L
FL
MAIN
Battery1 J17
J/C
P
ES27 S27 IC4
3
11
2210
218
19
Y1
Yaw Rate Sensor
W B
IO213 IO212
BAT9
20
81A
B 1D9 10
10
P 16W
EIC35 VSC
STRG
VSC
STRG
YAW
DLC3
WSHORT PIN
WDLC3YAW 05-21 16
- DIAGNOSTICSCAN COMMUNICATION SYSTEM
2306 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
CHECK CAN BUS LINE (CAN-H) FOR SHORT TO +B
CIRCUIT DESCRIPTION
A short to +B is suspected in the CAN bus line when there is continuity between terminals 16 (BAT) and 6
(CANH) of the DLC3.
SymptomTrouble Area
There is continuity between terminals 16 (BAT) and 6
(CANH) of DLC3.

Short to +B in CAN bus line (CANH)

Skid control ECU

Steering sensor

Yaw rate sensor
WIRING DIAGRAM
05IR4-03

G30962
1E
1G
2I2A IC4
S27 W Y
B WG
W BWL
WB
CANL CANH
CANLCANH
CANLCANH
CANL CANH BAT S14
Steering SensorJ16
J/CSkid Control ECU
With Actuator
D3
DLC310
311 12
1325
2
146
14
31 2 3 9
1
+BS Instrument Panel J/B
F7
FL BlockEngine Room J/BOBD
ECU-B
ALTBR
W-L
FL
MAIN
Battery1 J17
J/C
P
ES27 S27 IC4
3
11
2210
218
19
Y1
Yaw Rate Sensor
W B
IO213 IO212
BAT9
20
81A
B 1D9 10
10
P 16W
EIC35 VSC
STRG
VSC
STRG
YAW
DLC3
WSHORT PINYAW
DLC3
- DIAGNOSTICSCAN COMMUNICATION SYSTEM
05-2121
2311 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
CHECK CAN BUS LINE (CAN-L) FOR SHORT TO +B
CIRCUIT DESCRIPTION
A short to the +B is suspected in the CAN bus line when there is continuity between terminals 16 (BAT) and
14 (CANL) of the DLC3.
SymptomTrouble Area
There is continuity between terminals 16 (BAT) and 14
(CANL) of DLC3.

Short to +B in CAN bus line (CANL)

Skid control ECU

Steering sensor

Yaw rate sensor
WIRING DIAGRAM
05IR5-03

B80399
D.C.C
BatteryTheft Warning ECU Assy
+B1
E 29
13 5
3D 2A 4
3F
W-B 1W-B IC35
BR
FL Main 3Instrument Panel J/B Assy
Engine Room
J/B Assy
Center J/B
W ECU-B2A
2I1
SECURITY
5
IB+B2
W4
IC3IF1IL1 11
WL E
E J17
J/C
P
1G 1D
10
9P
2
L2
3 O
W-L
F7
FUSIBLE
LINK BLOCKT4 05-2026
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
2216 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
ECU POWER SOURCE CIRCUIT
CIRCUIT DESCRIPTION
This circuit provides power to operate the theft deterrent (warning) ECU.
WIRING DIAGRAM
0522S-06

B63408
Wire Harness Side
T4
Theft Warning ECU Assy
B63408
Wire Harness Side
T4
Theft Warning ECU Assy
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
05-2027
2217 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
INSPECTION PROCEDURE
1 CHECK THEFT WARNING ECU ASSY (ECU-B)
(a) Remove the ECU-B fuse from the engine room J/B.
(b) Measure the resistance.
Standard: Below 1 W
OK PROCEED TO NEXT CIRCUIT INSPECTION
SHOWN IN PROBLEM SYMPTOMS TABLE
NG
2 CHECK WIRE HARNESS (POWER SOURCE)
(a) Disconnect the T4 ECU connector.
(b) Measure the voltage of the wire harness side connector.
Standard:
Tester ConnectionSpecified Condition
T4-2 (+B1) - T4-29 (E)10 to 14 V
NG REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
3 CHECK THEFT WARNING ECU ASSY (GROUND)
(a) Disconnect the T5 ECU connector.
(b) Measure the resistance between the wire harness side
connector and body ground.
Standard:
Tester ConnectionSpecified Condition
T4-2 (+B1) - Body groundBelow 1 W
T4-29 (E) - Body groundBelow 1 W
NG REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
PROCEED TO NEXT CIRCUIT INSPECTION

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.

05ITD-02
A80020
Hand-held Tester
DLC3
A76900
ON
OFF
0.13 seconds0.13 seconds 05-40
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
230 Author
: Date
:
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
: Date
:
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).