sensor TOYOTA AVALON 2001 Service Manual Online
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Page 701 of 1897
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI-317
473 Author: Date:
2001 AVALON (RM808U)
DTC Normal Code Malfunction in ECM
CIRCUIT DESCRIPTION
If any trouble occurs in the ECM control system, the ECU prohibits ABS & VSC control.
DTC No.DTC Detecting ConditionTrouble Area
Normal Code
Conditions 1., 2,. 3, or 4,continue for 5 sec. or more:
1. Engine malfunction signal is sent from ECM.
2. Shift malfunction signal is sent from ECM
3. The shift position is other than P and N range input volt-
age is 8 V or more.
4. The shift position is PN or rev and D range input voltage
is 8 V or more.ECM circuit
ECM
Brake fluid level
Brake fluid level warning switch circuit
Steering angle sensor
ABS & BA & TRAC & VSC ECU
INSPECTION PROCEDURE
1 Is DTC out put for ECM?
Check DTC on page DI-3.
YES Repair engine control system according to the
output code.
NO
2 Check the DTC for the ABS and VSC (See page DI-252).
*1 Repair ABS and VSC control system according
to the code output.
*2
Check and replace translate ECU.
*1: Output NG code except for DTC of VSC system C1301/42
*2: Output NG code DTC of VSC system C1301/42 only
DI6OF-03
Page 707 of 1897
F09808
ABS & BA &
TRAC & VSC ECU
A20TS 42
LG-B
4A
4B4A J/B No. 4
3
12
12 LG-B
LG-B LG-B
II2 11
16 3TS
D1
DLC1
EBW-B
T524
TS Translate ECU D3
DLC3
E1 TSLG-B LG-B
14
AB0119S08096
F00446
Ts
DLC1Ts
DLC1Ts
DLC1Ts
DLC1Ts
DLC1 ONTs
DLC1 E
1
DI-344
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
500 Author: Date:
2001 AVALON (RM808U)
Ts Terminal Circuit
CIRCUIT DESCRIPTION
The sensor check circuit detects abnormality in the speed sensor signal which cannot be detected with the
DTC check.
Connecting terminals Ts and E
1 of the DLC1 starts the check.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 Check voltage between terminals Ts and E1 of DLC1.
CHECK:
(a) Turn the ignition switch ON.
(b) Measure the voltage between terminals Ts and E
1 of
DLC1.
OK:
Voltage: 10 - 14 V
OK If ABS warning light does not blink even after Ts
and E
1 are connected, the ECU may be defec-
tive.
NG
DI6OP-03
Page 719 of 1897
DI6NT-03
DI-258
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
414 Author: Date:
2001 AVALON (RM808U)
DIAGNOSTIC TROUBLE CODE CHART
NOTICE:
When removing the part, turn the ignition switch OFF.
When replacing the steering angle sensor or ECU, make sure to perform steering angle sensor
zero point calibration.
HINT:
Using SST 09843-18020, connect the terminals Tc and E1.
If any abnormality is not found when inspecting parts, inspect the ECU.
If a malfunction code is displayed during the DTC check, check the circuit corresponding the code. For
details of each code, refer to the page under respective ºDTC No.º in the DTC chart.
DTC chart of ABS system:
DTC No.
(See Page)Detection ItemTrouble Area
C0278 / 11
(DI-280)Open or short circuit in ABS solenoid relay circuitABS solenoid relay
ABS solenoid relay circuit
C0273 / 13
(DI-276)Open or short circuit in ABS motor relay circuitABS motor relay
ABS motor relay circuit
C0226 / 21
(DI-273)Open or short circuit in brake actuatorBrake actuator
SFRR or SFRH circuit
C0236 / 22
(DI-273)Open or short circuit in brake actuatorBrake actuator
SFLR or SFLH circuit
C0246 / 23
(DI-273)Open or short circuit in brake actuatorBrake actuator
SRRR or SRRH circuit
C0256 / 24
(DI-273)Open or short circuit in brake actuatorBrake actuator
SRLR or SRLH circuit
C0200 / 31*
(DI-267)Right front wheel speed sensor signal malfunction
C0205 / 32*
(DI-267)Left front wheel speed sensor signal malfunctionRight front, left front, right rear and left rear speed sensor
Eh d i itC0210 / 33*
(DI-267)Right rear wheel speed sensor signal malfunction
Each speed sensor circuit
Speed sensor rotor
C0215 / 34*
(DI-267)Left rear wheel speed sensor signal malfunction
C1330 / 35*
(DI-267)Open circuit in right front speed sensor circuitRight front speed sensor
Right front speed sensor circuit
C1331 / 36*
(DI-267)Open circuit in left front speed sensor circuitLeft front speed sensor
Left front speed sensor circuit
C1237 / 37
(DI-295)Front tires are different from rear in size.Tire size
Speed sensor rotor
C1332 / 38*
(DI-267)Open circuit in right rear speed sensor circuitRight rear speed sensor
Right rear speed sensor circuit
C1333 / 39*
(DI-267)Open circuit in left rear speed sensor circuitLeft rear speed sensor
Left rear speed sensor circuit
C1241 / 41
(DI-297)Low battery positive voltage or abnormally high battery positive
voltageBattery
Charging system
Power source circuit
C1249 / 58
(DI-303)Open circuit in stop light switch circuitStop light switch
Stop light switch circuit
Page 720 of 1897
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI-259
415 Author: Date:
2001 AVALON (RM808U)C1300 / 62
(DI-305)
Malfunction in ABS & BA & TRAC & VSC ECUABS & BA & TRAC & VSC ECU
Always ON
(DI-319)Malfunction in ABS & BA & TRAC & VSC ECU
Open circuit in ABS warning light circuitCharging system
ABS warning light circuit
*: As the DTC cannot be erased only by replacing parts, do either of the following operations.
(1) Clear DTC (See page DI-252).
(2) At a vehicle speed of 20 km/h (12 mph), drive the vehicle for 30 sec. or more.
DTC chart of VSC system:
DTC No.
(See Page)Detection ItemTrouble Area
C1225 / 25
(DI-273)Open or short circuit in brake actuator solenoid circuit (SMC1
circuit)Brake actuator
SMC1 circuit
C1226 / 26
(DI-273)Open or short circuit in brake actuator solenoid circuit (SMC2
circuit)Brake actuator
SMC2 circuit
C1227 / 27
(DI-273)Open or short circuit in brake actuator solenoid circuit (SRC1
circuit)Brake actuator
SRC1 circuit
C1228 / 28
(DI-273)Open or short circuit in brake actuator solenoid circuit (SRC2
circuit)Brake actuator
SRC2 circuit
C1301 / 42*Malfunction in communication with the translate ECU
Brake fluid level warning switch circuit
Translate ECU
Translate ECU circuit
ECM
ECM circuit
C0365 / 43
(DI-285)Malfunction in deceleration sensor (combined in yaw rate sen-
sor)Deceleration sensor
Deceleration sensor circuit
C1202 / 44
(DI-290)Brake fluid level low
Open circuit in brake fluid level warning switch circuitBrake fluid level
Brake fluid level warning switch
Brake fluid level warning switch circuit
C1350 / 51
(DI-306)Pump motor is locked
Open circuit in pump motor groundBrake actuator pump motor
Brake actuator pump motor circuit
C1351 / 52
(DI-308)VSC pump motor is locked
Open or short circuit in VSC pump motor circuitPrecharge pump motor
Precharge pump motor circuit
C1246 / 53
(DI-300)Malfunction in master cylinder pressure sensorMaster cylinder pressure sensor
Master cylinder pressure sensor circuit
C1208 / 54
(DI-292)Malfunction in steering angle sensorSteering angle sensor
Steering angle sensor circuit
C0371 / 55
(DI-287)Malfunction in yaw rate sensor circuitYaw rate sensor
Yaw rate sensor circuit
Always ON
(DI-322)Malfunction in ABS & BA & TRAC & VSC ECU
Open circuit in VSC warning light circuitCharging system
VSC warning light circuit
*: Troubleshoot according to the DTC chart of the translate ECU.
Page 721 of 1897
DI-260
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
416 Author: Date:
2001 AVALON (RM808U)
DTC chart of translate ECU(output NG code DTC of VSC system C1301/42 only):
DTC No.
(See Page)Detection ItemTrouble Area
Normal code*
(DI-317)Malfunction in ECM control system
ECM circuit
ECM
Brake fluid level
Brake fluid level warning switch circuit
Steering angle sensor
ABS & BA & TRAC & VSC ECU
42
(DI-31 1)Malfunction in communication with the ABS & BA & TRAC &
VSC ECUVSC+ or VSC- circuit
Translate ECU
ABS & BA & TRAC & VSC ECU
44
(DI-313)Open or short circuit in NEO circuit
NEO circuit
ECM
Translate ECU
53
(DI-315)Malfunction in communication with the ECM
TRC+ or TRC- circuit
ENG+ or ENG- circuit
ECM
Translate ECU
Non code
(DI-318)Malfunction in translate ECU
Tc terminal circuit
BRAKE warning light circuit
Translate ECU
*: Translate ECU is normal.
HINT:
The BRAKE warning light does not turn on due to an error in VSC.
If it is on, check that the parking brake pedal is released, the brake fluid level is normal and no malfunction
is identified in the fluid level warning switch system.
Page 722 of 1897
DI6NQ-01
Vehicle Brought to Workshop
Customer Problem Analysis
P. DI-251
Check and Clear DTC (Precheck)
P. DI-252Items inside
are titles of pages in this manual,
with the page number in the bottom portion. See
the pages for detailed explanations.
Problem Symptom ConfirmationSymptom Simulation
P. IN-20
Symptom
does not occur
Symptom
occurs
DTC Check
P. DI-252
Sensor CheckCircuit Inspection
P. DI-267 - DI-344
DTC Chart
P. DI-258 Malfunction codeProblem Symptoms Table
P. DI-266
Check for Fluid Leakage
P. DI-346
Identification of Problem
Normal code
Repair
Confirmation Test
End
1
2
3
4
5
67
89
10
11
Fail safe function:
When a failure occurs in the ABS & BA & TRAC & VSC system, the respective warning light (ABS, VSC) is lit and
the operation of ABS & BA & TRAC & VSC is prohibited. In addition to this, when the failure which disables the EBD
operation occurs, the brake warning light is lit as well and the EBD operation is prohibited.Step 2, 5, 8, 9, 11:Diagnostic steps permitting the use of the
TOYOTA hand-held tester or TOYOTA
break-out-box. DI-250
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
406 Author: Date:
2001 AVALON (RM808U)
ABS WITH EBD & BA & TRAC & VSC SYSTEM
HOW TO PROCEED WITH TROUBLESHOOTING
Troubleshoot in accordance with the procedure on the following pages.
Page 723 of 1897
DI6NU-01
F07883
ABS Warning Light
VSC Warning Light
VSC OFF Indicator Light
SLIP Indicator Light
BRAKE Warning Light
DLC2Rear Speed Sensor
Sensor Rotor
Brake Actuator
ABS & BA & TRAC & VSC ECU
VSC OFF Switch Front Speed Sensor
DLC1
ABS Solenoid RelayABS Motor Relay
Room R/B No. 8 Engine
Precharge PumpMaster Cylinder
Pressure Sensor
Parking Brake Switch
Stop Light Switch
Translate ECU
Front Speed Sensor
Sensor Rotor
Sensor Rotor
Rear Speed Sensor
DLC3
Steering Angle Sensor
Yaw Rate Sensor
(Including Deceleration Sensor)
Active Lamp Relay
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI-261
417 Author: Date:
2001 AVALON (RM808U)
PARTS LOCATION
Page 725 of 1897
R01346
Normal Code
0.25 sec.
0.25 sec. 2 sec.
ON
OFF
ON
OFF0.5 sec. 0.5 sec.
Code 11 and 21
4 sec.1.5 sec.
2.5 sec.
Code 11 Code 21
F02201
DLC1 E
1Tc
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI-253
409 Author: Date:
2001 AVALON (RM808U)
As an example, the blinking patterns for normal code and
codes 11 and 21 are shown on the left.
(4) Codes are explained in the code table on page
DI-258.
(5) After completing the check, disconnect terminals Tc
and E
1, and turn off the display.
If 2 or more malfunction codes are identified at the same time,
the lowest numbered DTC will be displayed 1st.
(c) In case of not using TOYOTA hand-held tester:
Check the DTC of translate ECU.
(1) Release the parking brake pedal.
(2) Check the brake fluid level.
(3) Using SST, connect terminals Tc and E
1 of DLC1.
SST 09843-18020
(4) Turn the ignition switch ON.
(5) Read the DTC from the BRAKE warning light.
HINT:
If no code appears, inspect the diagnostic circuit, and
BRAKE warning light circuit.
Trouble AreaSee page
Tc terminal circuitDI-342
BRAKE warning light circuitDI-330
When the parking brake is applied or the level of the brake
fluid is low, the BRAKE warning light is lit.
If every sensor is normal, a normal code is output. (A cycle
of 0.25 sec. ON and 0.25 sec. OFF is repeated.)
If 2 or more malfunction codes are identified at the same
time, the lowest numbered code will be displayed 1st.
Page 727 of 1897
F02201
DLC1
TsTc E
1
BR3904
0.13 sec. 0.13 sec.
ON
OFF
BR3893
Malfunction Code (Example Code 72, 76)
72 67
ON
OFF
0.5 sec. 0.5 sec. 0.5 sec. 0.5 sec.1.5 sec.
2.5 sec.4 sec.
Repeat
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI-255
411 Author: Date:
2001 AVALON (RM808U)
2. SPEED SENSOR SIGNAL CHECK (TEST MODE)
(a) In case of not using TOYOTA hand-held tester:
Check the sensor signal.
(1) Turn the ignition switch OFF.
(2) Using SST, connect terminals Ts and E
1 of DLC1.
SST 09843-18020
(3) Start the engine.
(4) Check that the ABS warning light blinks.
HINT:
If the ABS warning light does not blink, inspect the ABS warning
light circuit (See page DI-325).
(5) Drive vehicle straight forward.
Drive vehicle at a speed faster than 45 km/h (28
mph) for several seconds.
HINT:
The sensor check may not be completed if the front wheels are
spun or the steering wheel is steered during this check.
(6) Stop the vehicle.
(7) Using SST, connect terminals Tc and E
1 of DLC1.
SST 09843-18020
(8) Read the number of blinks of the ABS warning light.
HINT:
See the list of DTC shown on the next page.
If every sensor is normal, a normal code is output (A cycle
of 0.25 sec. ON and 0.25 sec. OFF is repeated).
If 2 or more malfunction codes are identified at the same
time, the lowest numbered code will be displayed 1st.
(9) After doing the check, disconnect the SST from ter-
minals Ts and E
1, Tc and E1 of DLC1, and turn the
ignition switch OFF.
SST 09843-18020
Page 728 of 1897
F07887
TOYOTA Hand-
held Tester
DLC3
F19119
DLC1
Ts E1
DLC3
CG
Ts
DI-256
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
412 Author: Date:
2001 AVALON (RM808U)
(b) In case of using TOYOTA hand-held tester:
Check the sensor signal.
(1) Hook up the TOYOTA hand- held tester to the
DLC3.
(2) Do step (3) - (6) on the previous page.
(3) Read the DTC by following the prompts on the tes-
ter screen.
HINT:
Please refer to the TOYOTA hand-held tester operator's manu-
al for further details.
DTC of speed sensor check function:
Code No.DiagnosisTrouble Area
C1271 / 71Low output voltage of right front speed sensor
Right front speed sensor
Sensor installation
Right front speed sensor rotor
C1272 / 72Low output voltage of left front speed sensor
Left front speed sensor
Sensor installation
Left front speed sensor rotor
C1273 / 73Low output voltage of right rear speed sensor
Right rear speed sensor
Sensor installation
Right rear speed sensor rotor
C1274 / 74Low output voltage of left rear speed sensor
Left rear speed sensor
Sensor installation
Left rear speed sensor rotor
C1275 / 75Abnormal change in output signal of right front speed sen-
sorRight front speed sensor rotor
C1276 / 76Abnormal change in output signal of left front speed sensorLeft front speed sensor rotor
C1277 / 77Abnormal change in output signal of right rear speed sensorRight rear speed sensor rotor
C1278 / 78Abnormal change in output signal of left rear speed sensorLeft rear speed sensor rotor
3. STEERING ANGLE SENSOR ZERO POINT CALIBRA-
TION
NOTICE:
Make sure to perform steering angle sensor zero point cal-
ibration when:
Replacing the steering angle sensor or ECU.
Adjusting the front wheel alignment of the steering
wheel center point in accordance with removal and
installation or replacement of the suspension, axle or
steering parts.
(a) Using the SST, connect terminals Ts and E
1 of DLC1 or
Ts and CG of DLC3
.
SST DLC1: 09843-18020
DLC3: 09843-18040
(b) Turn the ignition switch to the ON position, without start-
ing the engine.
(c) Make sure the steering wheel off center angle is within 3
degrees of center before attempting calibration.