Page 679 of 1897
F09821
ABS & BA &
TRAC & VSC ECU
1
A20
IG1
IJ Engine Room R/B No. 5J/B No. 3
J9
J/C
FL MAIN
BatteryEngine Room J/B
Y-R
J/B No. 4
18
4A 18
4H
Y-R Y-R11
3F 2
3C Driver Side J/B
Ignition Switch
ALTGND2 IG1 RelayECU-IG
No. 2
W-R13
1B
3
1B 1
1G
4
1C1
2
4 3
4
IG1
AM1AM1
B-L 2 W-L7
IF1W-L
55 21
B
1
2H 1
2G
F8 F101 1
F61GND1 29
A20
28
A20 W-B
W-B
W-B A
J5
J/C
J4
J/C A
AB
B W-B
W-B
W-B
IG W-B
W-B
FL Block W
B
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI-297
453 Author: Date:
2001 AVALON (RM808U)
DTC C1241 / 41 IG Power Source Circuit
CIRCUIT DESCRIPTION
This is the power source for the ECU, hence the brake actuators.
DTC No.DTC Detecting ConditionTrouble Area
C1241 / 41
At a vehicle speed of 6 km/h (4 mph) or more, the condition
that low battery voltage is 9.8 V or less (during non-opera-
tion of ABS control) or 9.4 V or less (during operation of
ABS control) and high battery voltage is more than 17.4 V,
continues for 0.5 sec. or more.
Battery
Charging system
Power source circuit
WIRING DIAGRAM
DI6O6-03
Page 680 of 1897
F07886
Driver Side J/B
ECU-IG
No. 2
DI-298
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
454 Author: Date:
2001 AVALON (RM808U)
INSPECTION PROCEDURE
1 Check ECU-IG No. 2 fuse.
PREPARATION:
Remove the ECU-IG No. 2 fuse from the driver side J/B.
CHECK:
Check continuity of the ECU-IG No. 2 fuse.
OK:
Continuity
NG Check for short circuit in all the harness and
components connected to ECU-IG No. 2 fuse
(See attached wiring diagram).
OK
2 Check battery positive voltage.
OK:
Voltage: 10 - 14 V
NG Check and repair the charging system (See
page CH-1).
OK
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 1180 of 1897
AB0119H01298H01299
(-) (+)ONAirbag Sensor Assembly
ACC
IG2
DI-444
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
600 Author: Date:
2001 AVALON (RM808U)
DTC B1100/31 Airbag Sensor Assembly Malfunction
CIRCUIT DESCRIPTION
The airbag sensor assembly consists of a airbag sensor, safing sensor, drive circuit, diagnosis circuit and
ignition control, etc.
It receives signals from the airbag sensor, judges whether or not the SRS must be activated, and detects
diagnosis system malfunction.
DTC B1100/31 is recorded when occurrence of a malfunction in the airbag sensor assembly is detected.
DTC No.DTC Detecting ConditionTrouble Area
B1100/31Airbag sensor assembly malfunctionAirbag sensor assembly
INSPECTION PROCEDURE
HINT:
When a malfunction code other than code B1100/31 is displayed at the same time, first repair the malfunction
indicated by the malfunction code other than code B1100/31.
1 Prepare for inspection (See step 1 on page DI-475).
2 Check voltage at IG2 and ACC of airbag sensor assembly.
CHECK:
(a) Turn the ignition switch to ON.
(b) Measure the voltage between body ground and each of
terminals IG2 and ACC of the airbag sensor assembly
connector.
OK:
Voltage: 10 - 14 V
NG Check that an abnormality occurs on the battery
and charging system.
OK
DI4D8-02
Page 1214 of 1897
AB0119H01298H01299
Airbag Sensor Assembly
ON
ACC
IG2
(+) (-)
H01249
ON
DI-478
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
634 Author: Date:
2001 AVALON (RM808U)
2 Check source voltage.
PREPARATION:
Connect negative (-) terminal cable to the battery.
CHECK:
(a) Turn ignition switch ON.
(b) Measure the voltage between body ground and each of
IG2 and ACC on the sensor and operate electric system
(defogger, wiper, headlight, heater blower, etc.).
OK:
Voltage: 10 - 14 V
NG Check harness between battery and airbag sen-
sor assembly, and check battery and charging
system.
OK
3 Does SRS warning light turn off?
PREPARATION:
(a) Turn the ignition switch to LOCK.
(b) Connect the steering wheel pad connector.
(c) Connect the front passenger airbag assembly connector.
(d) Connect the side airbag assembly connectors.
(e) Connect the seat belt pretensioner connectors.
(f) Connect the airbag sensor assembly connectors.
(g) Connect the front airbag sensor connectors.
(h) Connect the side airbag sensor assembly connectors.
(i) Turn the ignition switch to ON.
CHECK:
Operate electric system (defogger, wiper, headlight, heater
blower, etc.) and check that SRS warning light goes off.
NO Check for DTCs. If a DTC is output, perform trou-
bleshooting for the DTC. If a normal code is out-
put, replace airbag sensor assembly.
YES
From the results of the above inspection, the malfunctioning part can now be considered normal.
To make sure of this, use the simulation method to check.
Page 1479 of 1897
PP2DG-02
PP-62
- PREPARATIONAIR CONDITIONING
11 2 Author: Date:
2001 AVALON (RM808U)
AIR CONDITIONING
SST (Special Service Tools)
07110-58060Air Conditioner Service Tool Set
(07117-58060)Refrigerant Drain Service Valve
(07117-58070)T-Joint
(07117-58080)Quick Disconnect AdapterHigh pressure side
(07117-58090)Quick Disconnect AdapterLow pressure side
(07117-88060)Refrigerant Charging HoseHigh pressure side
(Color: Red)
(07117-88070)Refrigerant Charging HoseLow pressure side
(Color: Blue)
(07117-88080)Refrigerant Charging HoseUtility
(Color: Green)
07112-66040Magnetic Clutch Remover
07112-76060Magnetic Clutch Stopper
95994-10010Snap Ring Pliers
(DENSO Part No.)
95994-10020Snap Ring Pliers
(DENSO Part No.)
Page 1503 of 1897
PP0S6-01
- PREPARATIONCHARGING
PP-27
77 Author: Date:
2001 AVALON (RM808U)
EQUIPMENT
Ammeter (A)
Battery specific gravity gaugeExcept maintenance free battery
Belt tension gauge
OBDII scan tool
Torque wrench
Vernier calipersRotor (Slip ring)
