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05258–08
PRE–CHECK
1. SRS WARNING LIGHT CHECK
(a) Turn the ignition switch to the 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 ON and the SRS warning
C93955
light remains on or flashes, the airbag sensor assembly
has detected a malfunction code.
If, after approx. 6 second have elapsed, the SRS warning
light sometimes lights up, a short in the SRS warning light
circuit can be considered likely. Proceed to ”SRS warning
light circuit malfunction” on page
05–585 and 05–588.
Tc
2. DTC CHECK ( using diagnosis check wire)
(a) Present troubles codes:
Output the DTC.
(1) Turn the ignition switch to the ON position and wait
for approx. 60 seconds.
(2) Using SST, connect terminals Tc and CG of the
DLC3.
SST 09843–18040
CG H40173 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 CG of
the DLC3.
SST 09843–18040
(2) Turn the ignition switch to the ON position and wait
for approx. 60 seconds.
NOTICE:
Pay due attention to the terminal connecting position to
avoid a malfunction.
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DIAGNOSTICS – SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)
Normal Code (w/o Past Trouble Code) (c) Read the DTC.
Read the 2–digit DTC as indicated by the number of times
0.25 the SRS warning light blinks. As an example, the blinking
ON patterns, normal, 11 and 31 are shown in the illustration.
Normal code indication (w/o past trouble
OFF code)
The light will blink 2 times per second.
0.25 Normal code indication (w/ past trouble code)
Normal Code (w/ Past Trouble Code) When the past troubles code is stored in the
0.75
airbag sensor assembly, the light blinks only
ON ones a second.
Malfunction code indication
OFF The first blinking output indicates the first digit
of a 2–digit DTC. After a 1.5–second pause,
0.25
Malfunctioning Code the second blinking output will indicate the
(Example Code 11 and 31) second digit.
0.5 2.5 4.0
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.
Repeat
HINT:
1.5 0.5
In the event of a number of trouble codes, indication will start
DTC11 DTC31 from the smallest numbered code.
H13050
3. DTC CHECK (Using hand–held tester)
(a) Hook up the hand–held tester to the DLC3.
(b) Read the DTCs by following the prompts on the tester screen.
HINT:
Please refer to the hand–held tester operator’s manual for further details.
4. DTC CLEARANCE (Not using service wire)
(a) 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) Using a service wire, connect terminals TC and CG of the DLC3.
(b) Disconnect terminal TC of DLC3 within 10 seconds after the DTC begins to be output, and check if
the warning light lights up within 3 seconds.
(c) Within 2.0 seconds to 4.0 seconds after the SRS warning light lights up, connect the terminals TC and
CG of the DLC3.
(d) Light the SRS warning light goes off 2.0 to 4.0 seconds after connecting the terminals TC and CG of
DLC3, then disconnect the terminal TC of the DLC3 2.0 to 4.0 seconds after the warning light goes
off.
(e) Light the SRS warning light on again 3 seconds after disconnecting terminal TC of DLC3, then within
2.0 to 4.0 seconds after the lighting, connect terminals TC and CG of the DLC3.
(f) Check if the SRS warning light goes off 2.0 to 4.0 seconds after connecting terminals TC and CG of
DLC3, and the correct code is output 1 second after the SRS warning goes off.
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DIAGNOSTICS – SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)
If DTCs are to cleared, repeat the above procedure until the codes are cleared.
IG S/W ON
OFF
DLC3 Open
TC
Short
0.5 sec. 0.5 sec. 0.25 sec. 0.25 sec.
CG
SRS Warning
Light (*)
1.5 sec.
T1 T2 T3 T4 T5 T6 T5 T6 T5 T6 T5 T7
T1: 0 – ∞ second
T2: approx. 6 second
T3: 3 – 5 second
T4: 3 – 10 second
T5: 2 – 4 second
T6: 1 – 5 second
T7: within 1 second
*: The past trouble code in the illustration shows DTC 21 as an example.
H41917
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DIAGNOSTICS – SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)
6. DTC CLEARANCE (Using hand–held tester)
(a) Hook up the hand–held tester to the DLC3.
(b) Clear the DTCs by following the prompts on the tester screen.
HINT:
Please refer to the hand–held tester operation’s manual for further details.
7. RELEASE METHOD OF AIRBAG ACTIVATION PREVENTION MECHANISM
(a) An airbag activention 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 proce-
dure, 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 squib 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.
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DIAGNOSTICS – SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)
7
Side Airbag
Sensor Assy (RH)
8
Front Seat Airbag
Assy (RH) (Squib)
9
Seat Belt
Pretensioner (RH)
10 11
Front Airbag Sensor (RH)
2 6 Instrument Panel
Airbag Passenger Airbag
1
Sensor Spiral Cable Sub–Assy Assy (Squib)
4 5
Assy Center 3 Horn Button
Assy (Squib)
12 13
Front Airbag Sensor (LH)
14
Seat Belt
Pretensioner (LH)
15
Front Seat Airbag
Assy (LH) (Squib)
16
Side Airbag
Sensor Assy (LH)
H41916
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DIAGNOSTICS – SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)
Airbag Sensor Assy Center Connector
2 1 3
Short Spring Short Spring Short Spring Short Spring
Before Release After Release
Paper
Connector 4
Before Release After Release
Paper
Short Spring
Connector 6
Before Release After Release
Paper
Short Spring
Connector 8 15
Before Release After Release
Paper
Short Spring
H41995
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