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05-777
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
05IV6-03

DTC CHECK/CLEAR

1. SUPPLEMENTAL RESTRAINT SYSTEM DTC CHECK
(USING SST CHECK WIRE)
(a) Check the DTCs (Present trouble code).
(1) Turn the ignition switch to the ON position, and wait
for approximately 60 seconds.
(2) Using SST, connect terminals TC and CG of the
DTC3.
SST 09843-18040
H40173 NOTICE:
Connect the terminals to the correct positions to avoid a
malfunction.
(b) Check the DTCs (Past trouble code).
(1) Using SST, connect terminals TC and CG of the
DTC3.
SST 09843-18040
NOTICE:
Connect the terminals to the correct positions to avoid a
malfunction.
(2) Turn the ignition switch to the ON position, and wait
for approximately 60 seconds.
Normal System Code (c) Read the DTCs.
(w/o Past Trouble Code) (1) Read the blinking patterns of the DTCs. As exam-
0.25 ples, the blinking patterns for the normal system
ON code and trouble codes 11 and 31 are shown in the
illustration to the left.
OFF S Normal system code indication (w/o past
trouble code)
0.25
Normal System Code The light blinks twice per second.
(w/ Past Trouble Code) S Normal system code indication (w/ past
0.75 trouble code)
ON When the past trouble code is stored in the
airbag sensor assy center, the light blinks
OFF only once per second.
S Trouble code indication
0.25
Trouble Code The first blinking indicates the first DTC. The
(Example Code 11 and 31) second blinking occurs after a 1.5-second
0.5 2.5 4.0
pause.
If there are more than 1 code, there will be a 2.5-second pause
between each code. After all the codes are shown, there will be
Repeat a 4.0-second pause, and they will all be repeated.
1.5 0.5
HINT:
DTC 11 DTC 31 S If 2 or more malfunctions are found, the indication begins
will the smallest numbered code.
H13050 S If DTCs are indicated without connecting the terminals,
proceed to the "TC terminal circuit" on page 05-1 113.
2005 SIENNA REPAIR MANUAL (RM1163U)

Author : Date : 960
05-778
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM

2. DTC CLEAR (USING SST CHECK WIRE)
(a) Clear the DTCs.
(1) When the ignition switch is turned off, the DTCs are cleared.
HINT:
Depending on the DTC, the code may not be cleared by turning off the ignition switch. In this case, proceed
to the next procedure.
(2) Using SST, connect terminals TC and CG of the DLC3, and then turn the ignition switch to the
ON position.
SST 09843-18040
(3) Disconnect terminal TC of the DLC3 within 3 to 10 seconds after the DTCs are output, and check
if the SRS warning light comes on after 3 seconds.
(4) Within 2 to 4 seconds after the SRS warning light comes on, connect terminals TC and CG of
the DLC3.
(5) The SRS warning light should go off within 2 to 4 seconds after connecting terminals TC and CG
of the DLC3. Then, disconnect terminal TC within 2 to 4 seconds after the SRS warning light goes
off.
(6) The SRS warning light comes on again within 2 to 4 seconds after disconnecting terminal TC.
Then, reconnect terminals TC and CG within 2 to 4 seconds after the SRS warning light comes
on.
(7) Check if the SRS warning light goes off 2 to 4 seconds after connecting terminals TC and CG
of the DLC3. Also check if the normal system code is output within 1 second after the SRS warn-
ing light goes off.
If DTCs are not cleared, repeat this procedure until the codes are cleared.

IG S/W
ON

OFF
DTC3 Open
TC

Short
0.5 sec. 0.5 sec. 0.25 sec. 0.25 sec.
CG
ON
SRS Warning Light (*)

OFF

1.5 sec.

T1: 0 to sec.
T2: approx. 6 sec. T1 T2 T3 T4 T5 T6 T5 T6 T5 T6 T5 T7
T3: 3 to 5 sec.
T4: 3 to 10 sec.
T5: 2 to 4 sec.
T6: 1 to 5 sec.
T7: within 1 sec.
*: The past trouble code in the illustration shows DTC 21 as an example.
H44132

2005 SIENNA REPAIR MANUAL (RM1163U)

Author : Date : 961
05-779
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM

3. SUPPLEMENTAL RESTRAINT SYSTEM DTC CHECK (USING A HAND-HELD TESTER)
(a) Check the DTCs.
(1) Connect the hand-held tester to the DLC3.
(2) Turn the ignition switch to the ON position.
(3) Check the DTCs by following the prompts on the tester screen.
HINT:
Refer to the hand-held tester operator's manual for further details.
(b) Clear the DTCs.
(1) Connect the hand-held tester to the DLC3.
(2) Turn the ignition switch to the ON position.
(3) Clear the DTCs by following the prompts on the tester screen.
HINT:
Refer to the hand-held tester operator's manual for further details.
4. OCCUPANT CLASSIFICATION SYSTEM DTC CHECK (USING A HAND-HELD TESTER)
HINT:
When DTC B1150/23 is detected as a result of troubleshooting for the supplemental restraint system, per-
form troubleshooting for the occupant classification system.
S Since the DTCs for the occupant classification system can only be output by the hand-held tester, use
the hand-held tester to output the DTCs.
(a) Check the DTCs.
(1) Connect the hand-held tester to the DLC3.
(2) Turn the ignition switch to the ON position.
(3) Check the DTCs by following the prompts on the tester screen.
HINT:
Refer to the hand-held tester operator's manual for further details.
(b) Clear the DTCs.
(1) Connect the hand-held tester to the DLC3.
(2) Turn the ignition switch to the ON position.
(3) Clear the DTCs by following the prompts on the tester screen.
HINT:
Refer to the hand-held tester operator's manual for further details.

2005 SIENNA REPAIR MANUAL (RM1163U)

Author : Date : 962

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