Page 842 of 1897
DI-626
- DIAGNOSTICSBODY CONTROL SYSTEM
782 Author: Date:
2001 AVALON (RM808U)
WIRELESS DOOR LOCK CONTROL SYSTEM:
SymptomSuspect AreaSee page
All functions of wireless door lock control system do not operate.
1. Wireless door lock control receiver circuit
2. Key unlock warning switch circuit
3. Body ECUDI-651
DI-637
IN-30
Lock or unlock function does not operate.
1. Door key lock and unlock switch circuit
2. Door unlock detection switch circuit
3. Body ECUDI-688
DI-710
DI-686
DI-708
IN-30
Automatic lock function operates even if any door is opened within
30 seconds after all doors are unlocked by wireless door lock
control system.1. Door courtesy switch circuit
2. Body ECUDI-639
IN-30
Wireless door lock operates, but the buzzer does not sound.
1. Wireless door lock buzzer circuit
2. Wireless door lock receiver circuit
3. Body ECUDI-653
DI-651
IN-30
Buzzer sound, but wireless door lock function does not operate.1. Wireless door lock receiver circuit
2. Body ECUDI-651
IN-30
Luggage compartment door opener wireless function.1. Luggage compartment door opener motor circuit
2. Body ECUDI-649
IN-30
POWER MIRROR CONTROL SYSTEM:
SymptomSuspect AreaSee page
Mirror does not operate.
1. CIG/RAD fuse
2. Mirror switch circuit
3. Mirror motor
4. Body ECU
5. Wire harnessBE-9
DI-515
BE-1 14
IN-30
IN-30
Mirror operates abnormally.
1. Mirror switch circuit
2. Mirror motor
3. Body ECU
4. Wire harnessDI-515
BE-1 14
IN-30
IN-30
HORN SYSTEM:
SymptomSuspect AreaSee page
Horn system does not operate.
1. HORN fuse
2. Horn circuit
3. Wire harnessBE-9
DI-672
IN-30
Horns blow all the time.1. Horn circuit
2. Wire harnessDI-672
IN-30
One horn operates but the other horn does not operate.1. Horn circuit
2. Wire harnessDI-672
IN-30
Horns operate abnormally.1. Horn circuit
2. Wire harnessDI-672
IN-30
Page 1064 of 1897
DI1AN-06
I12540
Engine Room Junction Block
EFI Fuse
Instrument Panel Junction Block
IGN FuseECMIgnition Switch Assembly
Transponder Key Amplifier
Transponder Key Coil
Key Unlock Warning Switch
Security Indicator
DI-602
- DIAGNOSTICSENGINE IMMOBILISER SYSTEM
758 Author: Date:
2001 AVALON (RM808U)
PARTS LOCATION
Page 1065 of 1897
DI6LA-01
F07887DLC3Hand-held
Tester
N09214
DLC3
- DIAGNOSTICSENGINE IMMOBILISER SYSTEM
DI-599
755 Author: Date:
2001 AVALON (RM808U)
PRE-CHECK
1. DIAGNOSIS SYSTEM
(a) Description
ECM controls the function of immobiliser on this vehicle.
Data of the immobiliser or DTC can be read form DLC3 of
the vehicle. When a trouble occurs on immobiliser, check
engine warning light does not light up but DTC inspection
is performed.
Therefore when there seems to be a trouble on immobilis-
er, use hand-held tester or SST to check and trouble-
shoot it.
(b) Check the DLC3.
The vehicle's ECM uses ISO 14230 for communication.
The terminal arrangement of DLC3 complies with SAE
J1962 and matches the ISO 14230 format.
Terminal No.Connection / Voltage or ResistanceCondition
7Bus Line / Pulse generationDuring transmission
4Chassis Ground e Body Ground / 1 W or lessAlways
16Battery Positive e Body Ground / 9 ~ 14 VAlways
HINT:
If your display shows ºUNABLE TO CONNECT TO VEHICLEº
when you have connected the cable of the hand-held tester to
DLC3, turned the ignition switch ON and operated the hand-
held tester, there is a problem on the vehicle side or tool side.
If communication is normal when the tool is connected to
another vehicle, inspect DLC3 on the original vehicle.
If communication is still not possible when the tool is con-
nected to another vehicle, the problem is probably in the
tool itself, so consult the Service Department listed in the
tool's instruction manual.
Page 1211 of 1897
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-475
631 Author: Date:
2001 AVALON (RM808U)
DTC Normal Source Voltage Drop
CIRCUIT DESCRIPTION
The SRS is equipped with a voltage-increase circuit (DC-DC converter) in the airbag sensor assembly in
case the source voltage drops.
When the battery voltage drops, the voltage-increase circuit (DC-DC converter) functions to increase the
voltage of the SRS to normal voltage.
The diagnosis system malfunction display for this circuit is different from other circuits that is when the SRS
warning light remains lit up and the DTC is a normal code, source voltage drop is indicated.
Malfunction in this circuit is not recorded in the airbag sensor assembly, and the source voltage returns to
normal, the SRS warning light automatically goes off.
DTC No.Diagnosis
(Normal)Source voltage drop
DI1NV-16
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 1215 of 1897
H12004
Battery10Airbag Sensor Assembly
LA
C63
B-Y 5 12
1F 1A1I
II2
B-Y 5 B-Y
5 AB DLC1
B-Y
56 M7
SRS Warning Light
LG-B
IJ1 4
LG-B
2G 2B
SRS WRN
Engine Room J/BB
FL Block F7
F6 1
1
B FL MAINDriver Side J/B
12
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-479
635 Author: Date:
2001 AVALON (RM808U)
SRS Warning Light Circuit Malfunction
CIRCUIT DESCRIPTION
The SRS warning light is located on the combination meter.
When the SRS is normal, the SRS warning light lights up for approx. 6 seconds after the ignition switch is
turned from the LOCK position to ACC or ON position, and then turns off automatically.
If there is a malfunction in the SRS, the SRS warning light lights up to inform the driver of the abnormality.
When terminals Tc and E1 of the DLC1 are connected, the DTC is displayed by blinking the SRS warning
light.
WIRING DIAGRAM
DI5RJ-04
Page 1216 of 1897
AB0117H01293H01295
Airbag Sensor Assembly
LOCK
DI-480
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
636 Author: Date:
2001 AVALON (RM808U)
INSPECTION PROCEDURE
Always lights up, when ignition switch is in LOCK position
1 Prepare for inspection (See step 1 on page DI-475).
2 Does SRS warning light turn off?
PREPARATION:
(a) Turn the ignition switch to LOCK.
(b) Disconnect negative (-) terminal cable from the battery,
and wait at least for 90 seconds.
(c) Disconnect the airbag sensor assembly connector.
(d) Connect negative (-) terminal cable to the battery.
CHECK:
Check operation of SRS warning light.
NO Check SRS warning light circuit or terminal AB
circuit of DLC1.
YES
Replace airbag sensor assembly.
Page 1217 of 1897
N14677
Fuse
AB0119H01300
H01301
Airbag Sensor Assembly
ON
LA
(+)
(-)
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-481
637 Author: Date:
2001 AVALON (RM808U)
Does not light up, when ignition switch is turned to ACC or ON
1 Check ECU-B Fuse.
PREPARATION:
Remove the ECU-B fuse.
CHECK:
Check continuity of the ECU-B fuse.
OK:
Continuity
HINT:
Fuse may be burnt out even if it appears to be OK during
visual inspection.
If fuse is OK, install it.
NG Go to step 5.
OK
2 Prepare for inspection (See step 1 on page DI-475).
3 Check SRS warning light circuit.
PREPARATION:
(a) Connect negative (-) terminal cable to the battery.
(b) Turn the ignition switch to ACC or ON.
CHECK:
Measure the voltage between body ground and LA terminal of
the harness side connector of the airbag sensor assembly.
OK:
Voltage: 10 - 14 V
NG Check SRS warning light bulb or repair SRS
warning light circuit.
OK
