2001 TOYOTA AVALON Service Repair Manual

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.

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)

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)

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.

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

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)

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

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