Page 738 of 1897
D07910
C9
O/D OFF
Indicator Light
15
7
G-O163G 3AG-O9
E8ECM
ODLP
2
3F Y-G2
3CY-R13
1B
ECU-IG
No. 2211
1GW
W-B3
1B
4
IG1 RELAY34
1CW-R
I15 Ignition Switch
24
AM1 IG1 W-L 7
IF1 W-L
5 2 AM1
1
5 B
1
2H
12G
B-L
1
F8 F101
ALTF6BFL MAINBattery
IJ W-B 7
7
4A
W-B
O34
*12*1
O3
3
*2G-O
12
E6ODMS
*1: Floor Shift*2: Column Shift1
*2 16
W
O/D Main
Switch IG
Driver Side J/B
Engine Room R/B No. 5
Engine
Room
J/B
A 8
II2
G-O
J9 J/ C 4BJ/B No. 4 J/B No. 3
1 DI-206
- DIAGNOSTICSAUTOMATIC TRANSAXLE
362 Author: Date:
2001 AVALON (RM808U)
O/D Main Switch & O/D OFF Indictor Light Circuit
CIRCUIT DESCRIPTION
The O/D main switch is a momentary type switch. When pressing the O/D OFF main switch, the O/D OFF
indicator light lights up and ECM prohibits shifting to O/D, and when pressing it again, the O/D OFF indicator
light goes off and ECM allows shifting to O/D. Turning the IG switch OFF will reset the O/D OFF indicator
light.
WIRING DIAGRAM
DI1KD-08
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 740 of 1897
Q07595
2
4
D06554
ON
ODMS
DI-208
- DIAGNOSTICSAUTOMATIC TRANSAXLE
364 Author: Date:
2001 AVALON (RM808U)
3 Check O/D main switch.
PREPARATION:
Disconnect the O/D main switch connector.
CHECK:
(a) Floor shift:
Check continuity between terminals 2 and 4 of O/D main
switch connector.
(b) Column shift:
Check continuity between terminals 1 and 3 of O/D main
switch connector.
OK:
O/D main switch conditionSpecified condition
Press continuously O/D main switchContinuously
Release O/D main switchNo continuously
NG Replace and repair O/D main switch.
OK
4 Check voltage between terminal ODMS of ECM and body ground.
PREPARATION:
Turn the ignition switch ON.
CHECK:
Check voltage between terminal ODMS of ECM and body
ground when O/D main switch is ON and OFF.
OK:
O/D main switch conditionSpecified condition
Press continuously O/D main switchBelow 1.0 V
Release O/D main switch10 - 14 V
OK Check and replace the ECM (See page IN-30).
NG
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 744 of 1897
BE6653D01908D07204
ON
SPD
(-)
(+)
DI-180
- DIAGNOSTICSAUTOMATIC TRANSAXLE
336 Author: Date:
2001 AVALON (RM808U)
OK
3 Check voltage between terminal SPD of ECM connector and body ground.
PREPARATION:
Turn the ignition switch ON.
CHECK:
Measure voltage between terminal SPD of ECM connector and
body ground.
OK:
Voltage: 9 - 14 V
NG Check for open in harness and connector be-
tween J/B No. 3 and ECM (See page IN-30).
OK
4 Check for open in harness and connector between J/B No. 3 and combination
meter (See page IN-30).
NG Repair or replace harness or connector.
OK
5 Check ECM (See page IN-30).
NG Replace ECM.
OK
Check and repair the transaxle (clutch, brake
or gear etc.).
Page 764 of 1897
D07909
J5 J/C
A
A77
3A 3GW-B
P1
Park/Neutral
Position switch
W-B
2RL
2L
LLR-B
8
G-Y
3
Y
41
II1
2
II2
II2R-B
G-Y
Y18
3C
3C
3B
7
3C 3C
3D
3D 3C
GR *2
R-L
W-B20
20
15 15
FUSIBLE LINK
BLOCK
IG8
1D
1C
1B 1
1
3C9
Combination Meter
R2L
R-B G-Y
Y 25 6
16
1718 16 17
3F 3F 3G
3D
3A 3D18
16
17R-B
G-Y
Y
R-L
*1
R-L
*2
GR
*22
4D 4C11DIODE D6
3
2
1
GR
*2
ECU-ACC
GAUGE No. 2
2
410
1C
1G
1C1
4 1
3
F10
F8
F7
F6 11
1
1B-L
B2G
2G2H
2C 11
27AM2
BFL MAINBatteryB
5
1AM1
25
W-RW-L7
IF1
W-R W-L W-R W-G
4 3
IG1ACC ST2AM2
8 B-W R-L2020
E7 18
7
6R-B
G-Y
YE6
E6
E6R
2
LECM
NSW
I15
Ignition Switch
7
2 8
14
13
IG1 RELAY R-L
W
4 W-BJ/B No. 3
21
II2
II2
II2
J/B No. 3
J/B No. 3
J/B No. 4II1
Driver Side J/B
ALTEngine Room J/B Engine Room R/B No. 5
IF1 W-B*2
*1: Floor Shift
*2: Column ShiftAM1 DI-200
- DIAGNOSTICSAUTOMATIC TRANSAXLE
356 Author: Date:
2001 AVALON (RM808U)
WIRING DIAGRAM
Page 765 of 1897
D06555
L R
2NSW
Position
P, N
R
D
2
LNSW-Body
groundR-Body
ground2-Body
groundL-Body
ground
0 V 0 V
0 V
0 V
0 V0 V
0 V
0 V0 V
0 V
0 V
0 V
0 V 9 - 14 V
9 - 14 V
9 - 14 V 9 - 14 V*9 - 14 V*
9 - 14 V
9 - 14 V
- DIAGNOSTICSAUTOMATIC TRANSAXLE
DI-201
357 Author: Date:
2001 AVALON (RM808U)
INSPECTION PROCEDURE
1 Read PNP, REVERSE, 2ND and LOW signals.
When using TOYOTA hand-held tester:
PREPARATION:
(a) Remove the DLC3 cover.
(b) Connect a TOYOTA hand-held tester to the DLC3.
(c) Turn the ignition switch ON and TOYOTA hand-held tes-
ter main switch ON.
CHECK:
Shift lever into the P, R, N, 2 and L positions, and read the PNP,
REVERSE, 2ND and LOW signals on the TOYOTA hand-held
tester.
OK:
Shift positionSignal
22ND OFF " ON
LLOW OFF " ON
RREVERSE OFF " ON
P, NNSW OFF " ON
When not using TOYOTA hand-held tester:
PREPARATION:
(a) Remove the glove compartment.
(b) Turn the ignition switch ON.
CHECK:
Measure voltage between each of terminals NSW, 2, L and R
of ECM and body ground when the shift lever is shifted to the
following positions.
OK:
HINT:
*: The voltage will drop slightly due to lighting up of the back up
light.
OK Check and replace the ECM (See page IN-30).
NG
