warning lights TOYOTA AVALON 2001 Service Repair Manual

Z05730
BatteryIgnition
SwitchWarning Light
21
54 3
Z14203
Engine Coolant Temperature Gauge
Ignition
Switch
BatterySender
Gauge
Z15788
Engine Coolant Temperature Gauge
Ignition
Switch
BatteryTest Bulb
(3.4 W)
Wire Harness Side
1
I13322
A
DC
B BE-58
- BODY ELECTRICALCOMBINATION METER
1662 Author
: Date
:
2001 AVALON (RM808U)
12. INSPECT FUEL LEVEL WARNING LIGHT
(a) Disconnect the connector from the sender gauge.
(b) Connect terminals 1 and 3 on the wire harness side con-
nector.
(c) Turn the ignition switch ON, check that the warning light
lights up.
If the warning light does not light up, test the bulb or inspect wire
harness.
13. INSPECT ENGINE COOLANT TEMPERATURE RE-
CEIVER GAUGE OPERATION
(a) Disconnect the connector from the sender gauge.
(b) Turn the ignition switch ON, check that the receiver gauge
needle indicates COOL.
(c) Ground terminal on the wire harness side connector
through a 3.4 W test bulb.
(d) Turn the ignition switch ON, check that the bulb lights up
and the receiver gauge needle moves toward the hot
side.
If operation is as specified, replace the sender gauge.
Then recheck the system.
If operation is not as specified, measure the receiver gauge re-
sistance.
14. INSPECT ENGINE COOLANT TEMPERATURE RE-
CEIVER GAUGE RESISTANCE
Measure the resistance between terminals with fixing pointer to
the stopper.
Tester connectionResistance (W)
A - B250
C - D250
If resistance value is not as specified, replace the receiver
gauge.

I07709
35.63 ± 0.1 W
Slide
rheostat
35.63 ±
0.1 W
Z15789
Warning Light
Ignition
Switch
BatteryWire Harness
N06640
BE1217
Warning Light
Ignition
Switch
Battery
- BODY ELECTRICALCOMBINATION METER
BE-59
1663 Author
: Date
:
2001 AVALON (RM808U)
15. INSPECT ENGINE COOLANT TEMPERATURE SEND-
ER GAUGE RESISTANCE
Connect the wire harness as shown in the illustration, and ad-
just the ammeter pointer to indicate º0º using the slide rheostat,
then read the rheostat indication.
Temperature °C (°F)Resistance (W)
50 (122.0)160 - 240
120 (248.0)17.1 - 21.2
If resistance value is not as specified, replace the engine cool-
ant sender gauge.
16. INSPECT LOW OIL PRESSURE WARNING LIGHT
(a) Disconnect the connector from the warning switch and
ground terminal on the wire harness side connector.
(b) Turn the ignition switch ON, check that the warning light
lights up.
If the warning light does not light up, test the bulb or inspect wire
harness.
17. INSPECT LOW OIL PRESSURE WARNING SWITCH
OPERATION
(a) Check that continuity exists between the terminal and
ground with the engine stopped.
(b) Check that no continuity exists between the terminal and
ground with the engine running.
HINT:
Oil pressure should be over 29 kPa (0.35 kgf/cm
2, 4.3 psi)
If operation is not as specified, replace the switch.
18. INSPECT BRAKE WARNING LIGHT
(a) Disconnect the connector from the brake fluid warning
switch.
(b) Release the parking brake pedal.
(c) Connect the terminals on the wire harness side of the lev-
el warning switch connector.
(d) Start the engine, check that the warning light lights up.
If the warning light does not light up, test the bulb or wire har-
ness.

N02346
ON OFF
1 2
Z11183
1
Z15790
Warning Light
Ignition
Switch
BatteryWire Harness Side
123 45
6789101112
BE-60
- BODY ELECTRICALCOMBINATION METER
1664 Author
: Date
:
2001 AVALON (RM808U)
19. INSPECT BRAKE FLUID LEVEL WARNING SWITCH
OPERATION
(a) Remove the reservoir tank cap and strainer.
(b) Disconnect the connector.
(c) Check that no continuity exists between the terminals with
the switch OFF (float up).
(d) Use a siphon, etc. to take fluid out of the reservoir tank.
(e) Check that continuity exists between the terminals with
the switch ON (float down).
(f) Pour the fluid back in the reservoir tank.
If operation is not as specified, replace the switch.
20. INSPECT PARKING BRAKE WARNING SWITCH CON-
TINUITY
(a) Check that continuity exists between terminal and switch
body with the switch ON (switch pin released).
(b) Check that no continuity exists between terminal and
switch body with the switch OFF (switch pin pushed in).
If operation is not as specified, replace the switch or inspect
ground point.
21. INSPECT REAR LIGHTS WARNING LIGHT
(a) Disconnect the connector from the light failure sensor and
ground terminal 4 on the wire harness side connector.
(b) Start the engine, check that the warning light lights up.
If the warning light does not light up, test the bulb or inspect wire
harness.

Z07425
Wire harness side:
12 123 45
67 891011
Z05732
Warning Light
Ignition
Switch
Battery
1
I14605
Warning Light
Ignition
Switch
Battery
1 2
- BODY ELECTRICALCOMBINATION METER
BE-61
1665 Author
: Date
:
2001 AVALON (RM808U)
22. INSPECT LIGHT FAILURE SENSOR CIRCUIT
Disconnect the connector from the sensor and inspect the con-
nector on the wire harness side, as shown.
Tester connectionConditionSpecified condition
1 - GroundConstantContinuity*
2 - GroundConstantContinuity*
9 - GroundConstantContinuity*
10 - GroundConstantContinuity*
11 - GroundConstantContinuity
12 - GroundConstantContinuity*
3 - GroundLight control switch OFFNo voltage
3 - GroundLight control switch TAIL or HEADBattery positive voltage
4, 8 - GroundIgnition switch LOCK or ACCNo voltage
4, 8 - GroundIgnition switch ONBattery positive voltage
7 - GroundStop light switch OFFNo voltage
7 - GroundStop light switch ONBattery positive voltage
*: There is resistance because this circuit is grounded through
the bulb.
If the circuit is as specified, replace the sensor.
If the circuit is not as specified, inspect the circuits connected
to other parts.
23. INSPECT OPEN DOOR WARNING LIGHT
Disconnect the connector from the door courtesy switch, and
ground terminal 1 on the wire harness side connector and
check that the warning light lights up.
If the warning light does not light up, inspect the bulb or wire har-
ness.
24. INSPECT DOOR COURTESY SWITCH
(See page BE-31)
25. INSPECT SEAT BELT WARNING LIGHT
(a) Disconnect the connector from the terminals buckle
switch and ground terminal on the wire harness side con-
nector as shown in the illustration.
(b) Turn the ignition switch ON and check that the warning
light lights up.
If the warning light does not light up, check the bulb circuit.

BE-4
- BODY ELECTRICALTROUBLESHOOTING
1608 Author
: Date
:
2001 AVALON (RM808U)
COMBINATION METER (Meter, Gauges and Illumination):
SymptomSuspect AreaSee page
Tachometer, Fuel Gauge and Engine Coolant Temperature Gauge
do not operate.
1. ECU-B Fuse
2. ECU-IG No. 2 Fuse
3. Meter Circuit Plate
4. Wire Harness
5. Multi Display-
-
BE-43
-
-
Speedometer does not operate.
1. Vehicle Speed Sensor (ABS - ECU)
2. Meter Circuit Plate
3. Wire Harness
4. Multi DisplayBE-53
BE-43
-
-
Tachometer does not operate.
1. EFI - ECU
2. Meter Circuit Plate
3. Wire Harness
4. Multi Display-
BE-43
-
-
Fuel Gauge does not operate or abnormal operation.
1. Fuel Receiver Gauge
2. Fuel Sender Gauge
3. Meter Circuit Plate
4. Wire HarnessBE-53
BE-53
BE-43
-
Engine Coolant Temperature Gauge does not operate or abnormal
operation.
1. Engine Coolant Temperature Receiver Gauge
2. Engine Coolant Temperature Sender Gauge
3. Meter Circuit Plate
4. Wire HarnessBE-53
BE-53
BE-43
-
All illumination lights do not light up.
1. Bulb
2. PANEL Fuse
3. Light Control Rheostat
4. Wire Harness-
-
BE-53
-
Brightness does not change even when rheostat turned.
1. Bulb
2. Rheostat
3. Wire Harness-
-
-
Only one illumination light does not light up.1. Bulb
2. Wire Harness-
-
COMBINATION METER (Warning Lights):
SymptomSuspect AreaSee page
Warning lights do not light up. (Except Discharge, Open Door and
SRS)
1. Bulb
2. GAUGE No. 1 Fuse
3. Meter Circuit Plate
4. Wire Harness-
-
BE-53
-
Low Oil Pressure warning light does not light up.
1. Multi Display
2. Bulb
3. Low Oil Pressure Warning Switch
4. Meter Circuit Plate
5. Wire Harness-
-
BE-53
BE-43
-
Fuel Level warning light does not light up.
1. Multi Display
2. Bulb
3. Fuel Sender Gause
4. Meter Circuit Plate
5. Wire Harness-
-
BE-53
BE-43
-
ABS warning light does not light up.
1. Bulb
2. ABS ECU
3. Wire Harness-
DI-210
-

- BODY ELECTRICALTROUBLESHOOTING
BE-5
1609 Author
: Date
:
2001 AVALON (RM808U) Seat Belt warning light does not light up.
1. Bulb
2. Body Control System
3. Meter Circuit Plate
4. Wire Harness-
DI-615
BE-53
-
Discharge warning light does not light up.
1. AM2 - Fuse
2. Bulb
3. Meter Circuit Plate
4. Wire Harness
5. Generator-
-
BE-53
-
CH-9
Light Failure warning light does not light up.
1. Bulb
2. Light Failure Sensor
3. Bulb Check Relay
4. Wire Harness
5. Taillight System-
BE-53
BE-53
-
BE-2
Brake warning light does not light up.
1. Bulb
2. Parking Brake Switch
3. Brake Fluid Level Warning Switch
4. Bulb Check Relay
5. Meter Circuit Plate
6. Wire Harness-
BE-53
BE-53
BE-53
BE-43
-
SRS Warning light does not light up.
1. AM2 - Fuse
2. Bulb
3. Airbag Sensor Assembly
4. Meter Circuit Plate
5. Wire Harness-
-
RS-62
RS-67
BE-43
Open Door warning light does not light up.
1. DOME Fuse
2. Bulb
3. Door Courtesy Switch
4. Body Control System
5. Meter Circuit Plate
6. Wire Harness-
-
BE-31
DI-615
BE-43
-
Washer Level warning light does not light up.
1. Bulb
2. Washer Fluid Level Warning Switch
3. Meter Circuit Plate
4. Wire Harness-
BE-53
BE-43
-
COMBINATION METER (Indicator Lights):
SymptomSuspect AreaSee page
O/D OFF indicator light does not light up.
1. Bulb
2. O/D OFF Switch
3. ECM
4. Meter Circuit Plate
5. Wire Harness-
DI-203
DI-1
BE-43
-
Cruise Control indicator light does not light up.
1. Bulb
2. Cruise Control ECU
3. Meter Circuit Plate
4. Wire Harness-
DI-549
BE-43
-
High beam indicator light does not light up.
1. Bulb and Taillight
2. Headlight System
3. Meter Circuit Plate
4. Wire Harness-
BE-2
BE-43
-
Turn indicator light does not light up.
1. Bulb
2. Turn Signal and Hazard Warning System
3. Meter Circuit Plate
4. Wire Harness-
BE-2
BE-43
-

BE0I1-04
I12796
Left TurnRight Turn
54
1 2 3
15 166
7 8
9 10
11 17
14 13 12
I12792
BE1843
3
2
1
- BODY ELECTRICALTURN SIGNAL AND HAZARD WARNING SYSTEM
BE-29
1633 Author
: Date
:
2001 AVALON (RM808U)
INSPECTION
1. INSPECT TURN SIGNAL SWITCH CONTINUITY
Switch positionTester connectionSpecified condition
Left turn1 - 2Continuity
Neutral-No continuity
Right turn2 - 3Continuity
If continuity is not as specified, replace the switch.
2. INSPECT HAZARD WARNING SWITCH CONTINUITY
ConditionTester connectionSpecified condition
OFF5 - 7Continuity
ON5 - 6,
1 - 2 - 3 - 4Continuity
Illumination circuit8 - 9Continuity
If continuity is not as specified, replace the switch.
3. INSPECT TURN SIGNAL FLASHER OPERATION
(a) Connect the positive (+) lead from the battery to terminal
2 and the negative (-) lead to terminal 3.
(b) Connect the 2 turn signal light bulbs parallel to each other
to terminals 1 and 3, check that the bulbs flash.
HINT:

The turn signal lights should flash 60 or 120 times per min-
ute.

If one of the front or rear turn signal lights has an open cir-
cuit, the number of flashers will be more than 140 per min-
ute.

If operation is not as specified, replace the flasher.

F09799
ABS Actuator and ECU
A7 20
WA
Engine Room J/BEngine Room R/B No. 5
AM1
5 512
BIgnition Switch Driver Side J/B Multi Display
GAUGE No. 1
IG1 Relay10
1D
12
3 44
1C 3
1B1
1G W J/B No. 4
ABS
M65
M64
13
4F4
4DIE115
Battery FL Block
ALT 1
F8F61
BFL MAIN
IGB
B 7 A21
Active Light Relay
1 R-L
R-L
B-L ABS
D2
DLC215 4B
J/B No. 4
15 4A15
4HR-L
R-B R-B
4
W-R
IG1 AM12
7
IF1
1
2G1
2H
1
F10 W-BW-L
W-L 14
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM WITH ELECTRONIC
BRAKE FORCE DISTRIBUTION (EBD)DI-243
399 Author
: Date
:
2001 AVALON (RM808U)
ABS Warning Light Circuit
CIRCUIT DESCRIPTION
If the ECU detects trouble, the ABS warning light lights up and ABS control is prohibited at the same time.
At this time, the ECU records a DTC in memory.
Connecting terminals Tc and E
1 of the DLC1 makes the ABS warning light blink and output the DTC.
WIRING DIAGRAM
DI6NM-02

F09801
ABS Actuator
and ECU
A713
Battery J/B No. 3A21
Active Light Relay
Multi DisplayY-B
BRAKEPKB
PKB
Ignition Switch
IF1 A721
EBDW IE15
Y-B
6 5
8 3 Y-G
3B14
3A
6 3B
5
Y-G
B4
15R-W
IE116
R-Y
Y-G
1
P3
Parking
Brake
Switch W-BBody ECU
J1
J/CDriver Side J/B
B1
Bake Fluid
Level Warning
Switch
J/B No. 3
R-W3H
153B
15
15
3A
12
1I8
1H
R-W
1
2
B B
Engine Room J/BDriver Side J/BGAUGE No. 1 IG1 Relay
4
2D4
2F
W-B
ED
R-WR-WIC17
M63
M64R-B
J/B No. 4
13
4F4
4D
R-B
10
1D 1
2
3 44
1C 3
1B1
1G W
IGW-BEngine Room J/BEngine Room R/B No. 57
BAM1
B-L
FL Block
ALT5 512 1
2H 1
2G
1
F8
F10F61
BFL MAIN W-B
142
W-R
W-L
W-L R-Y DI-240
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM WITH ELECTRONIC
BRAKE FORCE DISTRIBUTION (EBD)
396 Author
: Date
:
2001 AVALON (RM808U)
BRAKE Warning Light Circuit
CIRCUIT DESCRIPTION
The BRAKE warning light lights up when the brake fluid is insufficient, parking brake is applied or the EBD
is defective.
WIRING DIAGRAM
DI6NL-02

DI6N9-01
F07882
Brake Actuator
(w/ ECU, Relay)Front Speed Sensor DLC1
DLC2
Sensor RotorRear Speed Sensor
ABS Warning Light
BRAKE Warning LightSensor Rotor
Front Speed Sensor
Rear Speed Sensor
Stop Light Switch
Sensor RotorActive
Lamp Relay
DI-216- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM WITH ELECTRONIC
BRAKE FORCE DISTRIBUTION (EBD)
372 Author
: Date
:
2001 AVALON (RM808U)
PARTS LOCATION