TOYOTA HIGHLANDER 2001 Service Repair Manual
Manufacturer: TOYOTA, Model Year: 2001, Model line: HIGHLANDER, Model: TOYOTA HIGHLANDER 2001Pages: 2572, PDF Size: 34.8 MB
Page 1081 of 2572
05-1508
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1698 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
10 PERFORM SENSITIVITY CHECK
(a) Using the hand-held tester, perform ºSensitivity checkº (see page 05-1203).
Standard value: 27 to 33 kg (59.52 to 72.75 lb)
NG Go to step 12
OK
11 RECHECK DTC
(a) Connect the negative (-) terminal cable to the battery.
(b) Turn the ignition switch to the ON position.
(c) Clear the DTCs stored in memory (see page 05-1215).
HINT:
First clear DTCs stored in the occupant classification ECU memory and then in the airbag sensor assy
center memory.
Use the hand-held tester to clear the DTC of the occupant classification ECU, otherwise the DTC can-
not be cleared.
(d) Turn the ignition switch to the LOCK position.
(e) Turn the ignition switch to the ON position.
(f) Using the hand-held tester, check the DTCs (see page 05-1215).
OK:
DTC B1793 is not output.
HINT:
Codes other than code B1793 may be output at this time, but they are related to this check.
NG Go to step 12
OK
END
12 REPLACE SEAT ADJUSTER FRAME ASSY
(a) Turn the ignition switch to the LOCK position.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) Replace the seat adjuster frame assy (see page 72-1 1, 72-19).
13 CHECK PERFORM ZERO POINT CALIBRATION
(a) Using the hand-held tester, perform ºZero point calibrationº (see page 05-1203).
OK:
The ºCOMPLETEDº is displayed.
Page 1082 of 2572
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
14 CHECK PERFORM SENSITIVITY CHECK
(a) Using the hand-held tester, perform ºSensitivity checkº (see page 05-1203).
Standard value: 27 to 33 kg (59.52 to 72.75 lb)
END
Page 1083 of 2572
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- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1700 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
DTC B1795 OCCUPANT CLASSIFICATION ECU
MALFUNCTION
CIRCUIT DESCRIPTION
DTC B1795 is recorded when a malfunction is detected in the occupant classification ECU.
Troubleshoot DTC B1771 first when the DTC B1771 and B1795 are output simultaneously.
DTC No.DTC Detecting ConditionTrouble Area
B1795
Occupant classification ECU circuit malfunction
Occupant classification ECU malfunction
When the occupant classification ECU receives a short to
ground signal in the passenger side buckle switch circuit
for 2 seconds.
The occupant classification ECU receives the ignition
switch LOCK to ON signal 50 times in a row when a mal-
function occurs in the power circuit for the occupant clas-
sification ECU (LOCK to ON to LOCK should be counted
as once).
Occupant classification ECU
Front seat wire RH
ECU-B Fuse
Front seat inner belt assy RH (Buckle switch RH)
HINT:
When DTC B1150/23 is detected as a result of troubleshooting for the supplemental restraint system,
perform troubleshooting for DTC B1795 of the occupant classification sensor.
Use the hand-held tester to check the DTC of the occupant classification ECU, otherwise the DTC
cannot be read.
05IX0-03
Page 1084 of 2572
H43112
O6
+BGND
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
05-151 1
1701 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
INSPECTION PROCEDURE
1 CHECK DTC
(a) Turn the ignition switch to the ON position, and wait for at least 10 seconds.
(b) Using the hand-held tester, check the DTCs (see page 05-1215).
Result:
A: DTC B1771 and B1795 are output.
B: DTC B1795 is output.
HINT:
Codes other than code B1771 and B1795 may be output at this time, but they are not related to this check.
A GO TO DTC B1771 (SEE PAGE 05-1446)
B
2 CHECK FUSE
(a) Check the ECU-B fuse.
Standard: Below 1 W
NG REPLACE FUSE
OK
3 CHECK WIRE HARNESS(SOURCE VOLTAGE)
(a) Turn the ignition switch to the LOCK position.
(b) Disconnect the negative (-) terminal cable from the bat-
tery, and wait for at least 90 seconds.
(c) Disconnect the ºO6º connector from the occupant classifi-
cation ECU.
(d) Connect the negative (-) terminal cable to the battery.
(e) Turn the ignition switch to the ON position.
(f) Measure the voltage and resistance according to the val-
ue(s) in the table below.
Standard:
Tester connectionConditionSpecified condition
O6-1 (+B) - Body groundIgnition switch ON10 to 14 V
O6-3 (GND) -
Body groundAlwaysBelow 1 W
NG REPAIR OR REPLACE WIRE HARNESS OR
BATTERY
OK
CHECK USE SIMULATION METHOD TO CHECK (SEE PAGE 05-1207)
Page 1085 of 2572
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- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1702 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
4 REPLACE OCCUPANT CLASSIFICATION ECU
(a) Turn the ignition switch to the LOCK position.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) Replace the occupant classification ECU (see page 60-64).
5 PERFORM ZERO POINT CALIBRATION
(a) Using the hand-held tester, perform ºZero point calibrationº (see page 05-1203).
OK:
The ºCOMPLETEDº is displayed.
6 PERFORM SENSITIVITY CHECK
(a) Using the hand-held tester, perform ºSensitivity checkº (see page 05-1203).
Standard value: 27 to 33 kg (59.52 to 72.75 lb)
END
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- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
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1703 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
DTC B1796 SLEEP OPERATION FAILURE OF
OCCUPANT CLASSIFICATION ECU
CIRCUIT DESCRIPTION
During sleep mode, the occupant classification ECU reads the condition of each sensor while the ignition
switch is off. In this mode, if occupant classification ECU detects an internal malfunction, DTC B1796 is out-
put.
DTC No.DTC Detecting ConditionTrouble Area
B1796Occupant classification ECU malfunctionOccupant classification ECU
HINT:
When DTC B1150/23 is detected as a result of troubleshooting for the supplemental restraint system,
perform troubleshooting for the DTC B1796 of the occupant classification ECU.
Use the hand-held tester to check the DTC of the occupant classification ECU, otherwise the DTC
cannot be read.
INSPECTION PROCEDURE
1 CHECK DTC
(a) Turn the ignition switch to the ON position.
(b) Clear the DTCs stored in memory (see page 05-1215).
HINT:
First clear DTCs stored in the occupant classification ECU memory and then in the airbag sensor assy
center memory.
Use the hand-held tester to check the DTC of the occupant classification ECU, otherwise the DTC
cannot be cleared.
(c) Turn the ignition switch to the LOCK position, and wait for at least 10 seconds.
(d) Turn the ignition switch to the ON position.
(e) Using the hand-held tester, check the DTCs (see page 05-1215).
OK:
DTC B1796 is not output.
HINT:
Codes other than code B1796 may be output at this time, but they are not related to this check.
NG Go to step 2
OK
USE SIMULATION METHOD TO CHECK (SEE PAGE 05-1207)
05IX1-01
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- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1704 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
2 REPLACE OCCUPANT CLASSIFICATION ECU
(a) Turn the ignition switch to the LOCK position.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) Replace the occupant classification ECU (see page 60-64).
3 PERFORM ZERO POINT CALIBRATION
(a) Using the hand-held tester, perform ºZero point calibrationº (see page 05-1203).
OK:
The ºCOMPLETEDº is displayed.
4 PERFORM SENSITIVITY CHECK
(a) Using the hand-held tester, perform ºSensitivity checkº (see page 05-1203).
Standard value: 27 to 33 kg (59.52 to 72.75 lb)
END
Page 1088 of 2572
B51715B79970
T1410
G K4
Unlock Warning
Switch Assy
1
2 W-B
G
KSW DD
IC W-B4L 4G 9
7J6
Junction Connector
Passenger
Side J/BTransponder Key ECU Assy 05-1998
- DIAGNOSTICSENGINE IMMOBILIZER SYSTEM
2188 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
DTC B2780 PUSH SWITCH/KEY UNLOCK WARNING
SWITCH MALFUNCTION
CIRCUIT DESCRIPTION
This DTC will be output if the transponder key ECU does not detect that the unlock warning switch is ON
even when the ignition switch is ON (under normal condition, the unlock warning switch is ON when the igni-
tion switch is ON).
DTC No.DTC Detection ConditionTrouble Area
B2780Unlock warning switch ON is not detected when ignition
switch is ONUnlock warning switch assy
Wire harness
Transponder key ECU assy
WIRING DIAGRAM
05A2A-06
Page 1089 of 2572
B51581
21
3 4Pushed Not pushed
- DIAGNOSTICSENGINE IMMOBILIZER SYSTEM
05-1999
2189 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
INSPECTION PROCEDURE
HINT:
Start the inspection from step 1 when using the hand-held tester and start from step 2 when not using the
hand-held tester.
1 READ VALUE OF HAND-HELD TESTER
(TRANSPONDER KEY ECU (SWITCH CONDITION))
(a) Connect the hand-held tester to the DLC3.
(b) Turn the ignition switch ON with the key that cannot start the engine.
(c) On the hand-held tester, select the following menu item: DIAGNOSIS/ENHANCED OBD II/DATA
LIST/IMMOBILISER/KEY SW. Read the values.
OK: ºONº (Key is in ignition key cylinder) appears on the screen.
ItemMeasurement Item/
Display (Range)Normal ConditionDiagnostic Note
KEY SWUnlock warning switch signal
/ON or OFFON: Key is in ignition key cylinder
OFF: No key is in ignition key cyl-
inder
-
NG Go to step 2
OK
REPLACE TRANSPONDER KEY ECU ASSY
2 INSPECT UNLOCK WARNING SWITCH ASSY
(a) Remove the unlock warning switch.
(b) Measure the resistance of the unlock warning switch.
Standard:
Tester ConnectionSwitch PositionSpecified Condition
1 - 2PushedBelow 1 W
1 - 2Not pushed10 kW or higher
NG REPLACE UNLOCK WARNING SWITCH ASSY
OK
Page 1090 of 2572
B63404
B65748B78556
T14
Transponder Key ECU Assy
K4
Unlock Warning Switch Assy Wire Harness Side
KSW
05-2000
- DIAGNOSTICSENGINE IMMOBILIZER SYSTEM
2190 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
3 CHECK WIRE HARNESS
(TRANSPONDER KEY ECU ASSY - UNLOCK WARNING SWITCH ASSY)
(a) Disconnect the T14 ECU and K4 switch connectors.
(b) Measure the resistance between the wire harness side
connectors.
Standard:
Symbols (Terminal No.)Specified Condition
T14-10 (KSW) - K4-2Below 1 W
NG REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
REPLACE TRANSPONDER KEY ECU ASSY