TOYOTA AVALON 2001 Service Repair Manual
Manufacturer: TOYOTA, Model Year: 2001, Model line: AVALON, Model: TOYOTA AVALON 2001Pages: 1897, PDF Size: 26.61 MB
Page 1231 of 1897
AT0716AB0056H08231
Normal Code
ON
OFF0.25
0.25
Code 11 and 31
ON
OFF
0.5 2.54.0
1.5 0.5
DTC 11
DTC 31Repeat
F07887
TOYOTA Hand-Held Tester
DLC3
DI-350
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
506 Author: Date:
2001 AVALON (RM808U)
(c) Read the DTC.
Read the 2-digit DTC as indicated by the number of times
the SRS warning light blinks. As an example, the blinking
patterns, normal, 11 and 31 are shown in the illustration.
Normal code indication
The light will blink 2 times per second.
Malfunction code indication
The first blinking output indicates the first digit
of a 2-digit DTC. After a 1.5-second pause,
the second blinking output will indicate the
second digit.
If there are 2 or more codes, there will be a 2.5-second pause
between each code. After all the codes have been output, there
will be a 4.0-second pause and they will all be repeated.
HINT:
In the event of a number of trouble codes, indication will
start from the smallest numbered code.
If a DTC is not output or a DTC is output without terminal
connection, proceed to the Tc terminal circuit inspection
on page DI-484.
3. DTC CHECK (Using TOYOTA hand-held tester)
(a) Hook up the TOYOTA hand-held tester to the DLC3.
(b) Read the DTCs by following the prompts on the tester
screen.
HINT:
Please refer to the TOYOTA hand-held tester operator's manu-
al for further details.
4. DTC CLEARANCE (Not using service wire)
When the ignition switch is turned off, the diagnostic trouble
code is cleared.
HINT:
DTC might not be cleared by turning the ignition switch OFF.
In this case, proceed to the next step.
5. DTC CLEARANCE (Using service wire)
(a) Connect the 2 service wires to terminals Tc and AB of
check connector.
(b) Turn the ignition switch to ACC or ON and wait for approx.
6 seconds.
Page 1232 of 1897
H01461H11969
H12011
ABTerminal
Tc
ABOFF
Body
Ground
OFF
ON
OFF
Several
Seconds50 m sec.
50 m sec.
1 second
(±0.5 sec.)
Tc
Body
Ground
1 second
(±0.5 sec.)
1
23
45
F07887
TOYOTA Hand-Held Tester
DLC3
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-351
507 Author: Date:
2001 AVALON (RM808U)
(c) Starting with the Tc terminal, ground alternately terminal
Tc and terminal AB twice each in cycles of 1.0 second.
Make sure that the terminals are grounded. Ensure the
terminal Tc remain grounded.
HINT:
When alternately grounding terminals Tc and AB, release
ground from one terminal and immediately ground the other ter-
minal within an interval of 0.2 seconds.
If DTCs are not cleared, repeat the above procedure until the
codes are cleared.
(d) Several seconds after doing the clearing procedure, the
SRS warning light will blink in a 50 - m sec. cycle to indi-
cate the codes which have been cleared.
6. DTC CLEARANCE (Using TOYOTA hand-held tester)
(a) Hook up the TOYOTA hand-held tester to the DLC3.
(b) Clear the DTCs by following the prompts on the tester
screen.
HINT:
Please refer to the TOYOTA hand-held tester operation's
manual for further details.
Page 1233 of 1897
DI-352
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
508 Author: Date:
2001 AVALON (RM808U)
7. RELEASE METHOD OF AIRBAG ACTIVATION PRE-
VENTION MECHANISM
An airbag activation prevention mechanism is built into the con-
nector for the squib circuit of the SRS.
When release of the airbag activation prevention mechanism is
directed in the troubleshooting procedure, as shown in the il-
lustration of the connectors on the next pages, insert paper
which has the same thickness as the male terminal between the
terminal and the short spring.
CAUTION:
Never release the airbag activation prevention mechanism
on the squib connector.
NOTICE:
Do not release the airbag activation prevention mech-
anism unless specifically directed by the trouble-
shooting procedure.
If the inserted paper is too thick the terminal and short
spring may be damaged, so always use paper with
the same thickness as the male terminal.
Page 1234 of 1897
H11971
Airbag Sensor
Assembly12
3
8
9
10
Side Airbag Assembly (RH)
(Squib)
11
12
13
14
Seat Belt Pretensioner (RH)
Side Airbag Sensor
Assembly (RH)
Front Airbag Sensor (RH)
5
Front Passenger Airbag
Assembly (Squib)
Spiral Cable7
Steering Wheel
Pad (Squib) 6
15
Front Airbag Sensor (LH)
Side Airbag Sensor
Assembly (LH)
Seat Belt Pretensioner (LH)
Side Airbag Assembly (LH)
(Squib) 4
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-353
509 Author: Date:
2001 AVALON (RM808U)
Page 1235 of 1897
H01233
H09658H09672
H01356
H02249H02248AB0130AB0045AB0046
H12012
Airbag Sensor Assembly Connector
Short SpringShort SpringShort Spring
Before Release After Release
Connector
Connector
Short Spring
Short SpringBefore Release
Paper
After Release
Paper
4
5
Paper
213
6
Connector
715
Paper
Short Spring DI-354
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
510 Author: Date:
2001 AVALON (RM808U)
Page 1236 of 1897
DI164-28
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-361
517 Author: Date:
2001 AVALON (RM808U)
PROBLEM SYMPTOMS TABLE
Proceed with troubleshooting of each circuit in the table below.
SymptomSuspect AreaSee page
With the ignition switch in ACC or ON position, the SRS warning
light sometimes lights up after approx. 6 seconds have elapsed.
SRS warning light is always lit up even when ignition switch is in
the LOCK position.SRS warning light circuitDI-479
With the ignition switch in ACC or ON position, the SRS warning
light does not light up.
DTC is not displayed.
SRS warning light is always lit up at the time of DTC check pro-
cedure.Tc terminal circuitDI-484
DTC is displayed without Tc and E1 terminal connection.
Page 1237 of 1897
DI1N2-13
H01357
C6
C5C7
287 8 9 10 16 17
18A B12 3 4 5 6
11 12 15 14 13
AABB
19 20 21 22 23 24 25 26 27 1 2 3 4 5 6
7 8 9 10 11 121 2 3 4 5 6
7 8 9 10 11 12
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-359
515 Author: Date:
2001 AVALON (RM808U)
TERMINALS OF ECU
No.SymbolTerminal Name
A-Electrical Connector Check Mechanism
B-Electrical Connector Check Mechanism
C5 - 1PL-Squib (Seat Belt Pretensioner, LH)
C5 - 2PL+Squib (Seat Belt Pretensioner, LH)
C5 - 5FL+Squib (Side, LH)
C5 - 6FL-Squib (Side, LH)
C5 - 7VUPLSide Airbag Sensor (LH)
C5 - 9SSL+Side Airbag Sensor (LH)
C5 - 10SSL-Side Airbag Sensor (LH)
C5 - 12ESLSide Airbag Sensor (LH)
C6 - 3LASRS Warning Light
C6 - 4GSWBody ECU
C6 - 5IG2Power Source (IGN Fuse)
C6 - 6ACCPower Source (CIG Fuse)
C6 - 9+SRFront Airbag Sensor (RH)
C6 - 10P+Squib (Passenger)
C6 - 11P-Squib (Passenger)
C6 - 12SILDiagnosis
C6 - 13D-Squib (Driver)
C6 - 14D+Squib (Driver)
C6 - 15+SLFront Airbag Sensor (LH)
C6 - 19TcDiagnosis
C6 - 20-SRFront Airbag Sensor (RH)
C6 - 26-SLFront Airbag Sensor (LH)
C6 - 27E1Ground
Page 1238 of 1897
DI-360
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
516 Author: Date:
2001 AVALON (RM808U)No.
SymbolTerminal Name
C6 - 28E2Ground
C7 - 1FR-Squib (Side, RH)
C7 - 2FR+Squib (Side, RH)
C7 - 5PR+Squib (Pretensioner, RH)
C7 - 6PR-Squib (Pretensioner, RH)
C7 - 7ESRSide Airbag Sensor (RH)
C7 - 9SSR-Side Airbag Sensor (RH)
C7 - 10SSR+Side Airbag Sensor (RH)
C7 - 12VUPRSide Airbag Sensor (RH)
Page 1239 of 1897
I13633
Theft Deterrent ECU
+B2
E
W-B L-R 3C
A5 5
IJ+B1
DOOR NO. 1
10
7 1
2
F7 F6 2G
FL MAIN
Battery 2C 12
1
12 ALT
113D
J9
J/C1B
W-B4B 1G
W
1
F10
B BEngine
Room J/B W-L9
1J9
1B ECU-B
W-GW-G
20
T4
J/B No. 3 Driver Side J/B
Fusible
Link
BlockDriver Side J/B
J/B No. 4
DCC
4A DI-534
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
690 Author: Date:
2001 AVALON (RM808U)
ECU Power Source Circuit
CIRCUIT DESCRIPTION
This circuit provides power to operate the theft deterrent ECU.
WIRING DIAGRAM
DI01W-13
Page 1240 of 1897
I14465
DOME FuseDOOR No.1
Fuse
I11587
1 (+B2)
2 (+B1) 11 (E)
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
DI-535
691 Author: Date:
2001 AVALON (RM808U)
INSPECTION PROCEDURE
1 Check DOME and DOOR No. 1 fuses.
PREPARATION:
Remove DOOR No. 1 and DOME fuse from instrument panel
J/B.
CHECK:
Check continuity of DOME and DOOR No. 1 fuses.
OK:
Continuity
NG Check for short in all the harness and compo-
nents connected to the DOME and DOOR No. 1
fuses (See attached wiring diagram).
OK
2 Check voltage between terminals each of +B1 and +B2 and E of theft deterrent
ECU connector.
PREPARATION:
Disconnect the theft deterrent ECU connector.
CHECK:
Measure voltage between terminals each of +B1 and +B2 and
E of theft deterrent ECU connector.
OK:
Voltage: 10 - 14 V
OK Proceed to next circuit inspection shown on
problem symptom table (See page DI-531).
NG