DI-239
DIAGNOSTICS
-
SUPPLEMENTAL RESTRAINT SYSTEM
DI8Z2-01
PRE-CHECK
1.
(a)
(b)
SRS WARNING LIGHT CHECK
Turn the ignition switch to the ON position and check that
the SRS warning light lights up.
Check that the SRS warning light goes out after approx.
6 seconds.
HINT:
H12912
When the ignition switch is at ON and the SRS warning
light remains on or flashes, the airbag sensor assembly
has detected a malfunction code.
If, after approx. 6 seconds have elapsed, the SRS warning 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 ”SRS warning light circuit malfunction” on
page DI-393 .
2.
(a)
DLC3
CG
TC
H10658
DTC CHECK (Using diagnosis check wire)
Present troubles codes:
Output the DTC.
(1) Turn the ignition switch to the ON position and wait
for approx. 20 seconds.
(2) Using SST, connect terminals Tc and CG of the
DLC3.
SST 09843-18040
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 DLC3.
SST 09843-18040
(2) Turn the ignition switch to the ON position and wait
for approx. 20 seconds.
NOTICE:
Pay due attention to the terminal connecting position to
avoid a malfunction.
2002 ECHO (RM884U)
Author:
Date:
409
DI-240
DIAGNOSTICS
SUPPLEMENTAL RESTRAINT SYSTEM
(c)
Normal Code
0.25
ON
OFF
0.25
Code 11 and 31
0.5
-
4.0
2.5
ON
OFF
1.5
0.5
DTC 11
AT0716
AB0056
Repeat
DTC 31
H08231
TOYOTA Hand-Held Tester
DLC3
D08002
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-398 .
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 manual 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 A/B of
DLC3.
(b) Turn the ignition switch to ON and wait for approx. 6 seconds.
2002 ECHO (RM884U)
Author:
Date:
410
DI-241
DIAGNOSTICS
(c)
-
SUPPLEMENTAL RESTRAINT SYSTEM
Starting with the Tc terminal, ground alternately terminal
Tc and terminal A/B 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 A/B, release
ground from one terminal and immediately ground the other terminal within an interval of 0.2 seconds.
If DTCs are not cleared, repeat the above procedure until the
codes are cleared.
Terminal
(± 0.5 sec.)
OFF
Tc
A/B
1 second
Body
Ground
1
1 second
(± 0.5 sec.)
5
3
Tc
OFF
A/B
H10687
Body
Ground
4
2
Several
Seconds
ON
50 m sec.
OFF
50 m sec.
H12912
H10589
H13129
TOYOTA Hand-Held Tester
(d)
Several seconds after doing the clearing procedure, the
SRS warning light will blink in a 50 - m sec. cycle to indicate the codes which have been cleared.
6.
(a)
(b)
DTC CLEARANCE (Using TOYOTA hand-held tester)
Hook up the TOYOTA hand-held tester to the DLC3.
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.
DLC3
D08002
2002 ECHO (RM884U)
Author:
Date:
411
DI-242
DIAGNOSTICS
-
SUPPLEMENTAL RESTRAINT SYSTEM
7.
RELEASE METHOD OF AIRBAG ACTIVATION PREVENTION MECHANISM
An airbag activation prevention mechanism is built into the connector 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 illustration 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 steering wheel pad connector.
NOTICE:
Do not release the airbag activation prevention mechanism unless specifically directed by the troubleshooting 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.
2002 ECHO (RM884U)
Author:
Date:
412
DI-243
DIAGNOSTICS
-
SUPPLEMENTAL RESTRAINT SYSTEM
2-Door:
7
8
9
10
11
12
13
Side Airbag Sensor
Assembly (RH)
Side Airbag
Assembly (RH) (Squib)
Seat Belt
Pretensioner (RH)
Door Side Airbag
Sensor (RH)
Front Airbag Sensor (RH)
6
2
Airbag
Sensor
Assembly
1
3
Front Passenger
Airbag Assembly (Squib)
Spiral Cable
5
4
14
Steering Wheel Pad
(Squib)
15
Front Airbag Sensor (LH)
16
17
18
19
20
Door Side Airbag
Sensor (LH)
Seat Belt
Pretensioner (LH)
Side Airbag
Assembly (LH) (Squib)
Side Airbag Sensor
Assembly (LH)
H12007
2002 ECHO (RM884U)
Author:
Date:
413
DI-244
DIAGNOSTICS
-
SUPPLEMENTAL RESTRAINT SYSTEM
4-Door:
7
8
9
10
Side Airbag Sensor
Assembly (RH)
Side Airbag
Assembly (RH) (Squib)
Seat Belt
Pretensioner (RH)
11
Front Airbag Sensor (RH)
6
2
Airbag
Sensor
Assembly
1
3
Spiral Cable
4
5
12
Front Passenger
Airbag Assembly (Squib)
Steering Wheel Pad
(Squib)
13
Front Airbag Sensor (LH)
14
15
16
Seat Belt
Pretensioner (LH)
Side Airbag
Assembly (LH) (Squib)
Side Airbag Sensor
Assembly (LH)
H15711
2002 ECHO (RM884U)
Author:
Date:
414
DI-245
DIAGNOSTICS
-
SUPPLEMENTAL RESTRAINT SYSTEM
Airbag Sensor Assembly Connector
2
Short Spring
1
3
Short Spring
Short Spring
Before Release
After Release
Paper
Connector 4 5 6
Before Release
After Release
Paper
Short Spring
Connector 8 19 (2-Door)
Connector 8 15 (4-Door)
Paper
Short Spring
H01356
H01233
H02248 H02249
H09672 H09658
H10693
2002 ECHO (RM884U)
Author:
Date:
415