Combination meter TOYOTA AVALON 2001 Service Service Manual
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Page 713 of 1897
F00052
(+) (-) 41
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI-337
493 Author: Date:
2001 AVALON (RM808U)
INSPECTION PROCEDURE
HINT:
Start the inspection from step 1 in case of using the TOYOTA hand-held tester and start from step 2 in case
of not using the TOYOTA hand-held tester.
1 Check operation of the VSC OFF indicator light.
PREPARATION:
(a) Connect the TOYOTA hand-held tester to the DLC3.
(b) Turn the ignition switch ON and push the TOYOTA hand-held tester main switch ON.
(c) Select the ACTIVE TEST mode on the TOYOTA hand-held tester.
CHECK:
Check that ºONº and ºOFFº of the VSC OFF indicator light can be shown on the combination meter with the
TOYOTA hand-held tester.
NG Go to step 4.
OK
2 Check VSC OFF switch.
PREPARATION:
(a) Remove the VSC OFF switch.
(b) Disconnect the VSC OFF switch connector.
CHECK:
Measure the resistance between terminals 1 and 4 of the VSC
OFF switch when the VSC OFF switch is ON and OFF.
OK:
VSC OFF switchResistance
PressedContinuity
Released1MW or higher
NG Replace VSC OFF switch.
OK
Page 714 of 1897
DI-338
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
494 Author: Date:
2001 AVALON (RM808U)
3 Check for open and short circuit in harness and connector between terminal
CSW of ABS & BA & TRAC & VSC ECU and VSC OFF switch and body ground
(See page IN-30).
NG Repair or replace harness or connector.
OK
4 Check VSC OFF indicator light.
See combination meter troubleshooting on page BE-2.
NG Repair or replace combination meter.
OK
5 Check for open and short circuit in harness and connector between terminal WT
of ABS & BA & TRAC & VSC ECU and VSC OFF indicator light (See page
IN-30).
NG Repair or replace harness or connector.
OK
Check and replace ABS & BA & TRAC & VSC
ECU.
Page 715 of 1897
F09818
ABS & BA &
TRAC & VSC ECU
VSCW A2070
P-B
R-B 15
4D
4F 134 4F15
4C P-BJ/B No. 4
M6 M6
R-B4
10 Multi Display
Driver Side J/B
1G1
1D 10
1B3
1C4
3
4 12 IG1 RelayGAUGE
No. 1
W-R 2
IG1 AM1
4 Ignition Switch
W-L W
IF1
7
W-L
5
5 1 2AM1 Engine Room R/B No. 5
B2G 2H11W-B
IG B-L
Battery
FL MAIN
B
F61 F10 F81 1
ALT
FL BlockVSC
Engine Room J/B
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI-327
483 Author: Date:
2001 AVALON (RM808U)
VSC Warning Light Circuit
CIRCUIT DESCRIPTION
If the ECU stores DTC to be necessary to shut down VSC operation, the VSC warning light lights on the
combination meter.
WIRING DIAGRAM
DI6OJ-03
Page 716 of 1897
DI-328
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
484 Author: Date:
2001 AVALON (RM808U)
INSPECTION PROCEDURE
HINT:
Start the inspection from step 1 in case of using the TOYOTA hand-held tester and start from step 2 in case
of not using the TOYOTA hand-held tester.
1 Check operation of the VSC warning light.
PREPARATION:
(a) Connect the TOYOTA hand-held tester to the DLC3.
(b) Turn the ignition switch ON and push the TOYOTA hand-held tester main switch ON.
(c) Select the ACTIVE TEST mode on the TOYOTA hand-held tester.
CHECK:
Check that ºONº and ºOFFº of the VSC warning light can be shown on the combination meter with the TOYO-
TA hand-held tester.
OK Check and replace ABS & BA & TRAC & VSC
ECU.
NG
2 Is DTC output?
YES Repair circuit indicated by the output code.
NO
3 Check for open and short circuit in harness and connector between ABS & BA &
TRAC & VSC ECU and VSC warning light (See page IN-30).
NG Repair or replace harness or connector.
OK
Page 717 of 1897
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI-329
485 Author: Date:
2001 AVALON (RM808U)
4 Check VSC warning light.
See the combination meter troubleshooting on page BE-2.
NG Repair or replace combination meter.
OK
Check and replace ABS & BA & TRAC & VSC
ECU.
Page 724 of 1897
F07880
DI6NS-01
F02201Tc E
1DLC1
DI-252
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
408 Author: Date:
2001 AVALON (RM808U)
PRE-CHECK
1. DIAGNOSIS SYSTEM
(a) Check the warning lights.
(1) Release the parking brake pedal.
(2) When the ignition switch is turned ON, check that
the ABS warning light, VSC warning light, VSC OFF
indicator light, BRAKE warning light and SLIP indi-
cator light goes on for approx. 3 seconds.
HINT:
When the parking brake is applied or the level of the brake
fluid is low, the BRAKE warning light is lit.
If the indicator check result is not normal, proceed to trou-
bleshooting for the ABS warning light circuit, VSC warn-
ing light circuit, VSC OFF indicator light circuit, BRAKE
warning light circuit or SLIP indicator light circuit.
Trouble AreaSee page
ABS warning light circuitDI-325
VSC warning light circuitDI-327
VSC OFF indicator light circuitDI-336
BRAKE warning light circuitDI-330
SLIP indicator light circuitDI-333
(b) In case of not using TOYOTA hand-held tester:
Check the DTC of ABS & BA & TRAC & VSC ECU.
(1) Using SST, connect terminals Tc and E
1 of DLC1.
SST 09843-18020
(2) Turn the ignition switch ON.
(3) Read the DTC from the ABS warning light and VSC
warning light on the combination meter.
HINT:
If no code appears, inspect the diagnostic circuit, ABS
warning light circuit or VSC waning light circuit.
Trouble AreaSee page
Tc terminal circuitDI-342
ABS warning light circuitDI-325
VSC warning light circuitDI-327
Page 739 of 1897
- DIAGNOSTICSAUTOMATIC TRANSAXLE
DI-207
363 Author: Date:
2001 AVALON (RM808U)
INSPECTION PROCEDURE
1 Check operation of O/D main switch.
PREPARATION:
Turn the ignition switch ON.
CHECK:
(a) Check O/D OFF indicator light when O/D main switch is
pushed in to ON.
(b) Check O/D OFF indicator light when O/D main switch is
pushed again.
OK:
(a) O/D OFF indicator light lights up.
(b) O/D OFF indicator light goes off.
OK Proceed to next inspection shown on symp-
toms problem tables (See page DI-175).
NG
2 Check and replace the combination meter (See page BE-2).
NG Replace the combination meter.
OK
Page 741 of 1897
D06553
ON
ODLP
- DIAGNOSTICSAUTOMATIC TRANSAXLE
DI-209
365 Author: Date:
2001 AVALON (RM808U)
5 Check voltage between terminal ODLP of ECM and body ground.
PREPARATION:
(a) Disconnect the connector of ECM.
(b) Turn the ignition switch ON.
CHECK:
Check voltage between terminal ODLP of ECM and body
ground.
OK:
Voltage: 7.5 - 14 V
OK Check and replace the ECM (See page IN-30).
NG
Check and replace harness and connector between combination meter and ECM, O/D main
switch and ECM, O/D main switch and body ground. (See page IN-30).
Page 742 of 1897
DI4DO-02
A00022
4-pulse
Combination
MeterECM 4-pulse
From
Speed SensorABS ECU DI-178
- DIAGNOSTICSAUTOMATIC TRANSAXLE
334 Author: Date:
2001 AVALON (RM808U)
CIRCUIT INSPECTION
DTC P0500 Vehicle Speed Sensor Malfunction
CIRCUIT DESCRIPTION
The speed sensor for ABS detects the wheel speed and sends the appropriate signals to the ABS ECU.
The ECU converts these signals in to a 4-pulse signal and outputs it to the combination meter.
After this signal is converted into a more precise rectangular waveform by the waveform shaping circuit in-
side the combination meter, it is then transmitted to the ECM. The ECM determines the vehicle speed based
on the frequency of these pulse signals.
DTC No.DTC Detecting ConditionTrouble Area
P0500
Satisfying all of the following conditions, 2 sec. (Intake air tem-
perature: -10 °C or more) or 8 sec. (Intake air temperature:
less than -10 °C) elapsed.
(c) After 2 sec. (the engine coolant temperature: 20 °C or
more) or 30 sec. (the engine coolant temperature: less than
20 °C) with the park/neutral position switch set to P, N posi-
tion.
(d) No abnormality of the throttle position sensor is detected.
(e) After 0.5 sec. or more with the ignition switch turned ON.
(f) No vehicle speed is signal to ECM.
(g) The engine rpm is equal to the speed sensor rpm or more
when the throttle opening angle is as shown below.
1. The throttle opening angle is less than 13° and the engine
rpm is 2,350 or more.
2. The throttle opening angle is less than 21° and the engine
rpm is 2,680 or more.
3. The throttle opening angle is less than 30° and the engine
rpm is 2,835 or more.
4. The throttle opening angle is less than 30° and the engine
rpm is 3,145 or more.
Open or short in vehicle speed sensor circuit
ABS speed sensor
Combination meter
ECM
ABS ECU
Automatic transaxle (clutch, brake or gear etc.)
Clutch or brake slips or gear is broken (2-trip detection logic)
Page 743 of 1897
D07904
18
M3V-W22 Combination
Meter
1
3F1
3C E7ECM
SPD V-W J/B No. 3
A02373
SPD
- DIAGNOSTICSAUTOMATIC TRANSAXLE
DI-179
335 Author: Date:
2001 AVALON (RM808U)
WIRING DIAGRAM
INSPECTION PROCEDURE
1 Check operation of speedometer.
CHECK:
Drive the vehicle and check if the operation of the speedometer in the combination meter is normal.
HINT:
The vehicle speed sensor is operating normally if the speedometer display is normal.
NG Check speedometer circuit.
OK
2 Check for short in harness and connector between terminal SPD of ECM and
body ground.
PREPARATION:
(a) Remove the glove compartment (See page BO-90).
(b) Disconnect the connector from ECM.
CHECK:
Check continuity between terminal SPD of ECM and body
ground.
OK:
No continuity
NG Repair or replace harness or connector.