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 801 of 2572
G26436
Skid Control ECU
(harness side connector)S27
ECM
E5
NEO
NEO
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
05-819
1009 Author: Date:
INSPECTION PROCEDURE
1 CHECK HARNESS AND CONNECTOR(SKID CONTROL ECU - ECM)
(a) Disconnect the skid control ECU connector and the ECM
connector.
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester ConnectionSpecified Condition
S27-10 (NEO) - E5-17 (NEO)Below 1 W
(c) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester ConnectionSpecified Condition
S27-10 (NEO) - Body ground10 kW or higher
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
Page 802 of 2572
G26185
ECM
NEOE5
A20293
4.5 to 14 V
Below 1 V20 V/DIV, 1 ms/DIV Pulse
Generation
05-820
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1010 Author: Date:
2 INSPECT ECM TERMINAL VOLTAGE(NEO TERMINAL)
(a) Reconnect the ECM connector and the skid control ECU
connector.
(b) Check the signal waveform between terminal NEO
(E5-17) of the ECM and body ground for the engine
conditions below.
OK:
Tester ConnectionEngine ConditionSpecified condition
E5-17 (NEO) - Body
groundOFF (Ignition switch ON)4.5 to 14 V or below 1 V
E5-17 (NEO) - Body
groundON (Idling)Pulse generation
(4.5 to 14 V e below 1 V)
NG REPLACE ECM
OK
3 CHECK IF SKID CONTROL ECU CONNECTOR IS SECURELY CONNECTED
NG CONNECT CONNECTOR TO ECU
OK
4 RECONFIRM DTC
(a) Clear the DTCs (see page 05-765).
(b) Turn the ignition switch to the ON position.
(c) Are the same DTCs recorded?
NO PROCEED TO NEXT CIRCUIT INSPECTION
SHOWN IN PROBLEM SYMPTOMS TABLE
(SEE PAGE 05-786)
YES
REPLACE ABS & TRACTION ACTUATOR ASSY(SEE PAGE 32-37)
Page 803 of 2572
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
05-821
1011 Author: Date:
DTC C1231/31 MALFUNCTION IN STEERING ANGLE
SENSOR CIRCUIT
CIRCUIT DESCRIPTION
The steering angle sensor signal is sent to the skid control ECU through the CAN communication system.
When there is a malfunction in the communication, it will be detected by the diagnosis function.
DTC No.DTC Detecting ConditionTrouble Area
C1231/31When ECU IG1 terminal voltage is 9.5 V or more, the steer-
ing angle sensor malfunction signal is received.
Steering angle sensor
Steering angle sensor circuit
+B circuit
CAN communication system
05CDA-18
Page 804 of 2572
F46318
S14
Steering SensorSkid Control ECU
with Actuator
Passenger Side J/B
Instrument Panel J/B
Passenger Side J/B
Instrument Panel J/B
Engine Room J/B I15
Ignition SW
F7 FL Block
FL
MAIN
BatteryJ17
J/C
AM1IG1ECU-IG
ALT
D.C.C ECU-B
IC AM1IC4 S27
IC4
IC3S27
1A 1C 1D 1G
2A 2I4C
4J4N
4L
4C
1C1D J16
J/C
1 2
3
45
67 8 9
1011 19 2125
1012 13
31
910
11
710
1
4 1 24
12
3B L W
YW W
E PP
E
LY
G
W
B
W W
W-L W-B W-B
W-B
BR CANL
ESS
IG1 CANH
BATCANL
CANH
1 2 05-822
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1012 Author: Date:
WIRING DIAGRAM
Page 805 of 2572
G26292
IG1
ESSBAT
(+) (-)(+)
(-)
S14
Steering Angle Sensor
(harness side connector)
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
05-823
1013 Author: Date:
INSPECTION PROCEDURE
HINT:
When U0121/94, U0123/62, U0124/95 or U0126/63 are output together with C1231/31, inspect and
repair the trouble areas indicated by U0121/94, U0123/62, U0124/95 or U0126/63 first.
When the speed sensor or the yaw rate sensor has trouble, DTCs for the steering angle sensor may
be output even when the steering angle sensor is normal. When DTCs for the speed sensor or yaw
rate sensor are output together with other DTCs for the steering angle sensor, inspect and repair the
speed sensor and yaw rate sensor first, and then inspect and repair the steering angle sensor.
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(STEERING ANGLE SENSOR)
(a) Connect the hand-held tester to the DLC3.
(b) Start the engine.
(c) Select the DATA LIST mode on the hand-held tester.
(d) Check that the steering angle value of the steering angle sensor indicated on the hand-held tester,
changes when the steering wheel is turned.
ItemMeasurement Item /
Range (Display)Normal Condition
STEERING ANGSteering sensor/
Min.: -1152 deg, Max.: 1150.875 degMin.: -128 deg/s
Max.: 128 deg/s
OK:
Steering angle value should change.
OK REPLACE ABS & TRACTION ACTUATOR ASSY
(SEE PAGE 32-37)
NG
2 CHECK TERMINAL VOLTAGE(STEERING ANGLE SENSOR CONNECTOR)
(a) Remove the steering wheel and the column lower cover.
(b) Disconnect the steering angle sensor connector S14.
(c) Turn the ignition switch to the ON position.
(d) Measure the voltage according to the value(s) in the table
below.
Standard:
Tester ConnectionSpecified Condition
S14-1 (IG1) - S14-2 (ESS)10 to 14 V
S14-3 (BAT) - S14-2 (ESS)10 to 14 V
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
REPLACE STEERING ANGLE SENSOR
Page 806 of 2572
05-824
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1014 Author: Date:
DTC C1232/32 MALFUNCTION IN DECELERATION SENSOR
DTC C1234/34 MALFUNCTION IN YAW RATE SENSOR
DTC C1243/43 MALFUNCTION IN DECELERATION SENSOR
DTC C1244/44 OPEN OR SHORT IN DECELERATION
SENSOR CIRCUIT
DTC C1245/45 MALFUNCTION IN DECELERATION SENSOR
DTC C1381/97 MALFUNCTION IN POWER SUPPLY
VOLTAGE YAW/DECELERATION SENSOR
CIRCUIT DESCRIPTION
The yaw rate sensor and deceleration sensor signals are sent to the skid control ECU through the CAN com-
munication system. When there is a malfunction in the communication, it will be detected by the diagnosis
function.
DTC No.DTC Detecting ConditionTrouble Area
C1232/32
While the vehicle is at a speed of 6mph (10 km/h) or more,
the condition that the fluctuation range of the signal from
either GL1 or GL2 is under 80 mV and the other is above
1.9 V continues for 30 seconds or more.
Yaw rate/deceleration sensor
Yaw rate/deceleration sensor circuit
C1234/34Slftiiliif tYaw rate/deceleration sensorC1234/34Sensor malfunction signal is reccives from yaw rate sensor.Ya w rate/deceleration sensor
Yaw rate/deceleration sensor circuit
C1243/43
The following condition repeats 16 times.
GL1 and GL2 do not change by more than 2LSB when the
vehicle decelerates from 19 mph (30 km/h) to 0 mph (0
km/h).
Yaw rate/deceleration sensor
Yaw rate/deceleration sensor circuit
C1244/44
When any of the following (1 to 2) is detected:
(1) All the following conditions continues for at least 60 se-
conds.
Vehicle is stopped.
Difference between IGL1I and IGL2I does not drop below
0.4 G once it reaches 0.6 G or more.
(2) Data malfunction signal is received from G sensor.
Yaw rate/deceleration sensor
Yaw rate/deceleration sensor circuit
C1245/45
The following condition continue for at least 60 seconds.
Difference between the values calculated from G sensor
value and vehicle speed exceeds 0.35 G.Yaw rate/deceleration sensor
Yaw rate/deceleration sensor circuit
C1381/97G sensor power source malfunction signal is received for
at least 10 sec. at a speed of more than 2 mph (3 km/h).Yaw rate/deceleration sensor
Yaw rate/deceleration sensor circuit
05CDB-18
Page 807 of 2572
F46306
Skid Control ECU
with Actuator Y1
Yaw Rate Sensor
Passenger Side J/B
Instrument Panel J/B I15
Ignition SW
F7
FL Block
FL MAIN
Battery GND
IG
ALTJ19
J/C
BF CANL
CANHCANL
CANH
AM1 IG1ECU-IG
AM1 IO2IC4
1A 1C 1D 4C 4J
1CS27
S27
IO2 IO2 IC4J16
J/C
12
3
4
5
6 7 9
1011 19 2025
12 13
3812 13
2
24
121
1 2B GL
OVW
Y WWW
G
WB B
W
A
A W-B
W-B
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
05-825
1015 Author: Date:
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
When U0121/94, U0123/62, U0124/95 or U0126/63 are output together with C1232/32 or C1334/34, inspect
and repair the trouble areas indicated by U0121/94, U0123/62, U0124/95 or U0126/63 first.
1 CHECK SENSOR INSTALLATION(YAW RATE SENSOR)
(a) Check that the yaw rate and deceleration sensor has been installed properly (see page 32-46).
NG INSTALL YAW RATE SENSOR CORRECTLY
(SEE PAGE 32-46)
OK
Page 808 of 2572
F45082IG Yaw Rate Sensor
(harness side connector)
Y1
F45082
GND
Yaw Rate Sensor
(harness side connector)
Y1
05-826
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1016 Author: Date:
2 CHECK HARNESS AND CONNECTOR(IG TERMINAL)
(a) Disconnect the yaw rate sensor connector.
(b) Turn the ignition switch to the ON position.
(c) Measure the voltage according to the value(s) in the table
below.
Standard:
Tester ConnectionSpecified Condition
Y1-5 (IG) - Body ground10 to 14 V
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
3 CHECK HARNESS AND CONNECTOR(GND TERMINAL)
(a) Disconnect the yaw rate sensor connector.
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester ConnectionSpecified Condition
Y1-1 (GND) - Body groundBelow 1 W
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
REPLACE ABS & TRACTION ACTUATOR ASSY (SEE PAGE 32-37)
Page 809 of 2572
F46315
I15
Ignition SWPassenger Side J/B Instrument Panel J/B
ECU-IG
AM1
AM1 IG1
FL MAIN
BatteryW
W1A 1C 1D
1C6 710
1
1 24H 4J42
S27 Skid Control ECU with Actuator
IC41046
32
S27 W-B
EB F7
FL BlockALT2 1Y
B 24B-R GR
GND1 IG1 G
A
J4
J/C
EA W-B
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
05-827
1017 Author: Date:
DTC C1241/41 LOW BATTERY POSITIVE VOLTAGE
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
C1241/41
When any of the following (1 to 2) is detected:
(1) Any of the following conditions continues for at least 10
seconds.
Vehicle speed is more than 2 mph (3 km/h).
IG1 terminal voltage is less than 9.5 V.
(2) Any of the following conditions continues for at least 0.2
seconds.
Solenoid relay remains ON.
IG1 terminal voltage is less than 9.5 V.
Relay contact is open.
Battery
Charging system
Power source circuit
WIRING DIAGRAM
05CDC-20
Page 810 of 2572
F40457
ECU-IG Instrument Panel J/B
05-828
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1018 Author: Date:
INSPECTION PROCEDURE
1 INSPECT FUSE(ECU-IG FUSE)
(a) Remove ECU-IG fuse from the instrument panel J/B.
(b) Check continuity of ECU-IG fuse.
Standard:
ECU-IG FuseBelow 1 W (Continuity)
NG INSPECT FOR SHORT CIRCUIT IN ALL
HARNESS AND COMPONENTS CONNECTED
TO ECU-IG FUSE
OK
2 INSPECT BATTERY
(a) Check the battery voltage.
Standard:
Tester ConnectionSpecified Condition
Battery terminal
((+) - (-))11 to 14 V
NG INSPECT CHARGING SYSTEM (SEE PAGE
19-12 (2AZ-FE) OR 19-36 (3MZ-FE))
OK