Page 1227 of 1897
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-357
513 Author: Date:
2001 AVALON (RM808U)
HINT:
When the SRS warning light remains lit up and the DTC is the normal code, this means a voltage source
drops.
This malfunction is not stored in memory by the airbag sensor assembly and if the power source volt-
age returns to normal, the SRS warning light will automatically go out.
When 2 or more codes are indicated, the codes will be displayed in numeral order starting from the
lowest numbered code.
If a code not listed on the chart is displayed, the airbag sensor assembly is faulty.
Page 1228 of 1897
DI1MX-12
Warning Light Check
P. DI-349
END
: Diagnostic steps permitting the use
of the TOYOTA hand-held tester.
P. DI-348
P. DI-349
Symptom SimulationNormal
DTC Check
Warning Light
ONMalfunction CodeWarning Light
Remains OFF
Circuit Inspection
Identification of Problem
Repair
Warning Light Check
P. DI-349
DTC Check (Read Past DTC)
Confirmation Test
Remains ON
Remains OFF
Clear DTC (Present and Past DTC)Items inside are titles of pages in this manual,
with the page number in the bottom portion. See the
pages for detailed explanations.
1
2
43
5
7
8
9
10
DTC Chart
11
6P. DI-355
P. IN-20 P. DI-362 to DI-484Remains OFF
Remains ON
Vehicle Brought to Workshop
Customer Problem Analysis
DTC Check (Read Present DTC)
Step 3, 4, 6, 8, 9, 11
P. DI-349
DTC Check (Read Past DTC)
P. DI-349
P. DI-349
P. DI-349
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-347
503 Author: Date:
2001 AVALON (RM808U)
SUPPLEMENTAL RESTRAINT SYSTEM
HOW TO PROCEED WITH TROUBLESHOOTING
Page 1229 of 1897
DI1N1-10
H11973
Spiral Cable Accessory Meter
(Warning Light)Front Passenger Airbag Assembly
Side Airbag Assembly (RH)
Side Airbag Sensor
Assembly (RH)
Seat Belt Pretensioner (RH) Side Airbag Sensor
Assembly (LH)
Seat Belt
Pretensioner (LH)
Side Airbag Assembly (LH)Airbag Sensor Assembly Front Airbag Sensor (RH)
Steering Wheel Pad
(with Airbag)Front Airbag
Sensor (LH)
DI-358
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
514 Author: Date:
2001 AVALON (RM808U)
PARTS LOCATION
Page 1230 of 1897
H11969
DI1MZ-1 1
R13006
DLC1
E1 Tc
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-349
505 Author: Date:
2001 AVALON (RM808U)
PRE-CHECK
1. SRS WARNING LIGHT CHECK
(a) Turn the ignition switch to the ACC or ON position and
check that the SRS warning light lights up.
(b) Check that the SRS warning light goes out after approx.
6 seconds.
HINT:
When the ignition switch is at ACC or ON and the SRS
warning light remains on or flashes, the airbag sensor as-
sembly has detected a malfunction code.
If, after approx. 6 seconds have elapsed, the SRS warn-
ing light sometimes lights up or the SRS warning light
lights up even when the ignition switch is OFF, a short in
the SRS warning light circuit can be considered likely.
Proceed to ºSRS warning light circuit malfunctionº on
page DI-479.
2. DTC CHECK (Using diagnosis check wire)
(a) Present troubles codes:
Output the DTC.
(1) Turn the ignition switch to the ACC or ON position
and wait for approx. 20 seconds.
(2) Using SST, connect terminals Tc and E1 of the
DLC1.
SST 09843-18020
NOTICE:
Pay due attention to the terminal connecting position to
avoid a malfunction.
(b) Past troubles codes:
Output the DTC.
(1) Using service wire, connect terminals Tc and E1 of
the DLC1.
SST 09843-18020
(2) Turn the ignition switch to the ACC or ON position
and wait for approx. 20 seconds.
NOTICE:
Pay due attention to the terminal connecting position to
avoid a malfunction.
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 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
