TOYOTA HIGHLANDER 2001 Service Repair Manual

- DIAGNOSTICSSFI SYSTEM (3MZ-FE)(From August, 2004)
05-41 1
601 Author
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Hand-held Tester DisplayDiagnostic Note Test Details
INTAKE CTL VSV1
[Test Details]
Activate VSV for intake control
ON or OFF
'
CAN CTRL VSV
[Test Details]
Activate VSV for canister control
ON or OFF
'
EVAP VSV (ALONE)
[Test Details]
Activate EVAP VSV control
ON or OFF
'
A/C MAG CLUTCH
[Test Details]
Control A/C magnet clutch
ON or OFF
'
FUEL PUMP / SPD
[Test Details]
Control the fuel pump
ON or OFF
'
VVT CTRL B1
[Test Details]
Active VVT system (bank 1)
ON or OFF
ON: Rough idle or engine stall

OFF: Normal engine speed
VVT CTRL B2
[Test Details]
Active VVT system (bank 2)
ON or OFF
ON: Rough idle or engine stall

OFF: Normal engine speed
ACM INHIBIT
[Test Details]
Control ACM inhibit
ON or OFF
'
TC/TE1
[Test Details]
Connect TC and TE1
ON or OFF
'
FC IDL PROHBT
[Test Details]
Control idle fuel cut prohibit
ON or OFF
'

E74081
D9
Door Courtesy SW
Rear LHD10
Door Courtesy SW
Rear RHD8
Door Courtesy SW
Front RHD7
Door Courtesy SW
Front LH J13
J/CBody ECU
W
B
BBW14
IA1LG15
B12RCTY
PCTY 16
B12
11
B11DCTY SB
B 17
IO2
9
IA1 V
B
6
BH1
G
1111W
- DIAGNOSTICSLIGHTING SYSTEM
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
DOOR COURTESY SWITCH CIRCUIT
CIRCUIT DESCRIPTION
The multiplex network body ECU detects the condition of the door courtesy switch assy.
WIRING DIAGRAM
05CS4-05

E74263
Multiplex Network Body ECU
Connector Front View:
B12 B11
B12-16 B12-15B11-1 1
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
INSPECTION PROCEDURE
1 CHECK HARNESS AND CONNECTOR(COURTESY LAMP SWITCH - MULTIPLEX
NETWORK BODY ECU)
(a) Disconnect the B11 and B12 connectors from the multiplex network body ECU.
(b) Measure the resistance according to the value(s) in the table below.
Standard:
Tester connectionConditionSpecified condition
B11-1 1 - Body groundDriver side door is open.
Driver side door is closed.Below 1 W
10 kW or higher
B12-16 - Body groundFront passenger side door is open.
Front passenger side door is closed.Below 1 W
10 kW or higher
B12-15 - Body groundOne of the rear side doors is open.
Both rear side doors are closed.Below 1 W
10 kW or higher
NG Go to step 2
OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
(SEE PAGE 05-1538)

E71371
ON
OFF
- DIAGNOSTICSLIGHTING SYSTEM
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
2 INSPECT COURTESY LAMP SWITCH
(a) Remove the courtesy lamp switch.
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester connectionConditionSpecified condition
1 - Body groundOFF
(When shaft is pressed)10 kW or higher
1 - Body ground
ON
(When shaft is not
pressed)
Below 1 W
NG REPLACE COURTESY LAMP SWITCH
OK
REPAIR OR REPLACE HARNESS OR CONNECTOR (EACH OF COURTESY SWITCH CIRCUIT)

05ESP-05
A80020
Hand-held Tester
DLC3
05-38
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
228 Author
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
DTC CHECK/CLEAR
NOTICE:

If no DTC appears in normal mode:
On the OBD II scan tool or the hand-held tester check
the pending fault code using the Continuous Test Re-
sults function (Mode 7 for SAE J1979).

When the diagnosis system is changed from normal
mode to check mode or vice-versa, all DTCs and
freeze frame data recorded in normal mode will be
erased. Before changing modes, always check and
make a note of DTCs and freeze frame data.
1. CHECK DTC (Using the OBD II scan tool or hand-held
tester)
(a) Connect the OBD II scan tool or hand-held tester to the
DLC3.
(b) Turn the ignition switch ON.
(c) Use the OBD II scan tool or the hand-held tester to check
the DTCs and freeze frame data and then write them
down.
For the hand-held tester, enter the following menus:
DIAGNOSIS / ENHANCED OBD II / DTC INFO / CUR-
RENT CODES. For the OBD II scan tool, see its instruc-
tion manual.
(d) See page 05-48 to confirm the details of the DTCs.
NOTICE:
When simulating a symptom with the OBD II scan tool (ex-
cluding hand-held tester) to check for DTCs, use the nor-
mal mode. For DTCs subject to º2 trip detection logicº, per-
form either of the following actions.

Turn the ignition switch OFF after the symptom is
simulated once. Then repeat the simulation process
again. When the problem has been simulated twice,
the MIL illuminates and the DTCs are recorded in the
ECM.

Check the pending fault code using the Continuous
Test Results function (Mode 7 for SAE J1979) on the
OBD II scan tool.
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.

P
A90343
A80017
A91474
Engine Room J/B
ETCS EFI NO. 1
Engine Room R/B No. 2
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
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 terminal for more
than 60 seconds.
After disconnecting the battery cable, perform the ºINI-
TIALIZEº procedure (see page 05-893).

A90306
I15
Ignition
Switch
EE W-BIK2 AM2IGN1 Instrument Panel J/B Assy
E5
E9ECM
BatteryFL
MainEFI
NO. 1
4
W9
1 4E
1
E5
1 10GR
3
21 5EFI Relay
EHBR
BR AAP
Engine Room J/B
J7
J/C 2FIGSW
+B
E1 B EJ6
J/C
MRELE58
P-LE P 4
4M 6
1G 1
1CPassenger Side J/B
W
J2
J/C A W1
2I4
2B
5
2BW
W 10
IK313 IC1 1AM2 IG2
F7
FL Block AssyY
L-Y6
7
3 05-312
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
ECM POWER SOURCE CIRCUIT
CIRCUIT DESCRIPTION
When the ignition switch is turned ON, battery voltage is applied to terminal IGSW of the ECM. The ECM
ºMRELº output signal causes current to flow to the coil, closing the contacts of the EFI relay (Marking: EFI)
and supplying power to terminal +B of the ECM.
If the ignition switch is turned OFF, the ECM holds the EFI relay ON for a maximum of 2 seconds to allow
for the initial setting of the throttle valve.
WIRING DIAGRAM
05EVZ-05

A67446
+B (+)E1 (-)
E5
ECM E9
ECM
A81698
E1
E9
ECM
Wire Harness Side
A67446
IGSW (+)E1 (-)
E9
ECME5
ECM
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
INSPECTION PROCEDURE
1 INSPECT ECM (+B VOLTAGE)
(a) Turn the ignition switch ON.
(b) Measure the voltage between of the ECM connectors.
Standard:
Tester ConnectionSpecified Condition
E5-1 (+B) - E9-1 (E1)9 to 14 V
OK PROCEED TO NEXT CIRCUIT INSPECTION
SHOWN ON PROBLEM SYMPTOMS TABLE
(See page 05-31)
NG
2 CHECK WIRE HARNESS (ECM - BODY GROUND)
(a) Disconnect the E9 ECM connector.
(b) Measure the resistance of the wire harness side connec-
tors.
Standard:
Tester ConnectionSpecified Condition
E9-1 (E1) - Body groundBelow 1 W
NG REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
3 INSPECT ECM (IGSW VOLTAGE)
(a) Turn the ignition switch ON.
(b) Measure the voltage of the ECM connectors.
Standard:
Tester ConnectionSpecified Condition
E5-9 (IGSW) - E9-1 (E1)9 to 14 V
OK Go to step 6
NG

A90344
IGN Fuse Instrument
Panel J/B
Assy
1
5 6 2 3
7 8 4
A56879IG2 AM2
I15
Ignition
Switch
A67446
MREL (+)E1 (-)
E9
ECME5
ECM
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- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
4 CHECK FUSE (IGN)
(a) Remove the IGN fuse from the instrument panel J/B Assy.
(b) Measure the resistance of the IGN fuse.
Standard: Below 1 W
NG REPLACE FUSE
OK
5 INSPECT IGNITION OR STARTER SWITCH ASSY
(a) Measure the resistance of the ignition switch terminals.
Standard:
Switch ConditionTester ConditionSpecified Condition
LOCK6 (IG2) - 7 (AM2)10 kW or higher
ON6 (IG2) - 7 (AM2)Below 1 W
NG REPLACE IGNITION OR STARTER SWITCH
ASSY
OK
CHECK AND REPAIR HARNESS AND CONNECTOR (BATTERY - IGNITION SWITCH, IGNITION
SWITCH - ECM)
6 INSPECT ECM (MREL VOLTAGE)
(a) Turn the ignition switch ON.
(b) Measure the voltage of the ECM connectors.
Standard:
Tester ConnectionSpecified Condition
E5-8 (MREL) - E9-1 (E1)9 to 14 V
NG REPLACE ECM (See page 10-9)
OK

A90343
Engine Room J/B
EFI NO. 1 fuse
B60778
5
1
2 312
5
3
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
7 CHECK FUSE (EFI NO. 1)
(a) Remove the EFI NO. 1 fuse from the engine room J/B.
(b) Measure the resistance of the EFI NO. 1 fuse.
Standard: Below 1 W
NG REPLACE FUSE
OK
8 INSPECT RELAY (EFI)
(a) Remove the EFI relay from the engine room J/B.
(b) Measure the resistance of the EFI relay.
Standard:
Tester ConnectionSpecified Condition
3 - 510 kW or higher
3 - 5Below 1 W
(when battery voltage is applied to terminals 1 and 2)
NG REPLACE RELAY
OK