Toyota Sequoia (2005). Manual - part 338

DIDGN–01

H10658

DLC3

TC

CG

H13050

0.5

2.5

4.0

1.5

0.5

DTC 11

DTC 31

Repeat

0.75

ON

OFF

0.25

0.25

ON

OFF

0.25

Normal System Code 
(w/o Past Trouble Code)

Normal System Code 
(w/ Past Trouble Code)

Trouble Code 
(Example Codes 11 and 31)

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DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

DI–1147

1341

DTC CHECK / CLEAR

1.

CHECK DTC (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
DLC3.

SST

09843–18040

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
DLC3.

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.

(c)

Read the DTCs.
Read the blinking patterns of the DTCs. As examples, the
blinking patterns for trouble codes 11 and 31 are shown
in the illustration to the left.

Normal system code (w/o past trouble code)
The light blinks twice per second.

Normal system code (w/ past trouble code)
When the past trouble code is stored in the
airbag sensor assy center, the light blinks
only once per second.

Trouble code
The first blinking indicates the first DTC. The
second blinking occurs after a 1.5–second
pause.

If there are more than 1 code, there will be a 2.5–second pause
between each code. After all codes are shown, there will be a
4.0–second pause, and they all will be repeated.
HINT:

If 2 or more malfunctions are found, the indication begins
with the smallest numbered code.

If DTCs are indicated without connecting the terminals,
proceed to the ”TC terminal circuit” on page 

DI–1498

.

DI–1148

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DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

1342

2.

CLEAR DTC (Using SST service wire)

Clear the DTCs.

(1)

When the ignition switch is turned off, the DTCs are
cleared.

HINT:
Some DTC 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 of dis-
connecting.

(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 se-
conds 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 se-
conds after the SRS warning light comes on.

H13049

Ignition 

Switch

DLC3

SRS Warning 

Light (*)

OFF

ON

OFF

ON

Open

Short

T1

T4

T6

T2

T5

T7

0.5 sec.

T1: 0 to 

∞

 second

T2: approx. 6 seconds
T3: 3 to 5 seconds
T4: 3 to 10 seconds
T5: 2 to 4 seconds
T6: 1 to 5 seconds
T7: within 1 second

T3

1.5 sec.

0.25 sec.

T6

T5

T6

T5

T5

0.25 sec.

*: The past trouble code in the illustration shows DTC 21 as an example.

0.5 sec.

TC

CG

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DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

DI–1149

1343

(7)

Check if the SRS warning light goes off 2 to 4 se-
conds after connecting terminals TC and CG of the
DLC3. Also check if the normal system code is out-
put within 1 second after the SRS warning light goes
off.

If DTCs are not cleared, repeat this procedure until the codes
are cleared.

A08841

Hand–held Tester

DLC3

DI–1150

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DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

1344

3.

CHECK DTC (Using hand–held tester)

HINT:
Refer to the hand–held tester operator’s manual for further de-
tails.
(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:
When check the DTC of the occupant classification ECU, select
the ”OCCUPANT DETECT” on the hand–held tester.
(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 tes-
ter screen.

HINT:
When clear the DTC of the occupant classification ECU, select
the ”OCCUPANT DETECT” on the hand–held tester.