2001 TOYOTA SEQUOIA terminal TC

DIDGM±01
A04550
13 9 14 10 15 11 16 1251 62 73 84
DLC3
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1137
1331 Author: Date:
2005 SEQUOIA (RM1146U)
DIAGNOSIS SYSTEM
1. CHECK DLC3
The vehicle's ECM uses ISO 14230 for communication. The ter-
minal arrangement of the DLC3 complies with SAE J1962 and
matches the ISO 14230 format.
Terminal No.Connection/Voltage or ResistanceCondition
7Bus
Line/Pulse generationDuring Transmission
4Chassis Ground e Body Ground/Below 1 WAlways
16Battery Positive e Body Ground/10 to 14 VAlways
HINT:
If the display shows UNABLE TO CONNECT TO VEHICLE
when you have connected the cable of the OBD II scan tool or
hand±held tester to the DLC3, turned the ignition switch ON
and operated the scan tool, there is a problem on the vehicle
side or tool side.

If communication is normal when the tool is con-
nected to another vehicle, inspect the DLC3 on the
original vehicle.

If communication is still not possible when the tool
is connected to another vehicle, the problem is
probably in the tool itself, so consult the Service De-
partment listed in the tool's instruction manual.

H24023
H24021
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1143
1337 Author: Date:
2005 SEQUOIA (RM1146U)
7. CHECK PASSENGER AIRBAG ON/OFF INDICATOR
(a) Turn the ignition switch to the ON position.
(b) Check that the passenger airbag ON/OFF indicator (ºONº
and ºOFFº) comes on for approximately 4 seconds, then
goes off for approximately 2 seconds.
HINT:
Refer to the table in step 4 regarding the passenger airbag ON/
OFF indicator when the ignition switch is turned to the ON posi-
tion and approximately 6 seconds pass.
8. CHECK RSCA OFF INDICATOR
(a) Check that the RSCA OFF indicator is off when turning
the ignition switch to the ON position.
(b) Check that the RSCA OFF indicator comes on when turn-
ing the RSCA OFF switch on (press the switch for approxi-
mately 2 seconds) with the ignition switch on.
(c) Turn the ignition switch to the LOCK position with the
RSCA OFF indicator is on, and then turn the ignition
switch to the ON position. Check that the RSCA OFF indi-
cator is off.
9. RELEASE METHOD OF ACTIVATION PREVENTION MECHANISM
The activation prevention mechanism is built into the connector for the squib circuit of the SRS.
As explained in the troubleshooting section, insert a piece of paper that is the same thickness as the male
terminal between the terminal and the short spring to release it (Refer to the illustrations on the next 3 pages).
CAUTION:
Never release the activation prevention mechanism on the squib connector even when inspecting
with the squib disconnected.
NOTICE:

Do not release the activation prevention mechanism unless specially directed by the trouble-
shooting procedure.

To prevent the terminal and the short spring from being damaged, always use a piece of paper
that is the same thickness as the male terminal.

DIDGN±01
H10658
DLC3
TC CG
H13050
0.5
2.5 4.0
1.50.5
DTC 11
DTC 31Repeat 0.75
ON
OFF0.25 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)
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1147
1341 Author: Date:
2005 SEQUOIA (RM1146U)
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 ºTC terminal circuitº on page DI±1498.

DI±1148
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1342 Author: Date:
2005 SEQUOIA (RM1146U)
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 (*)
OFFON
OFFON Open
Short
T1 T4T6
T2T5 T7 0.5 sec.
T1: 0 to 8 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 secondT31.5 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
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1149
1343 Author: Date:
2005 SEQUOIA (RM1146U)
(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.

DIDGR±01
H10600H23564
DTC B1000/31
DLC3
TC CG
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1161
1355 Author: Date:
2005 SEQUOIA (RM1146U)
CIRCUIT INSPECTION
DTC B1000/31 Airbag Sensor Assembly Malfunction
CIRCUIT DESCRIPTION
The airbag sensor assembly consists of the airbag sensor, the safing sensor, the drive circuit, the diagnostic
circuit, ignition control, etc.
If the airbag sensor assembly receives signals from the airbag sensor, it determines whether or not the SRS
should be activated.
DTC B1000/31 is recorded when a malfunction is detected in the airbag sensor assembly.
DTC No.DTC Detection ConditionTrouble Area
B1000/31
Airbag sensor assembly malfunction
Airbag sensor assembly
HINT:
When a trouble code is displayed simultaneously with B1000/31, repair the malfunction indicated by this
code (except B1000/31) first.
INSPECTION PROCEDURE
1 Check airbag sensor assembly.
PREPARATION:
(a) Turn the ignition switch to the LOCK position.
(b) Disconnect the negative (±) terminal cable from the bat-
tery, and wait for at least 90 seconds.
(c) Connect the negative (±) terminal cable to the battery,
and wait for at least 2 seconds.
CHECK:
(a) Turn the ignition switch to the ON position, and wait for at
least 60 seconds.
(b) Clear the DTCs stored in memory (see page DI±1147).
(c) Turn the ignition switch to the LOCK position.
(d) Turn the ignition switch to the ON position, and wait for at
least 60 seconds.
(e) Check the DTCs (see page DI±1147).
OK:
DTC B1000/31 is not output.
NG Replace airbag sensor assembly
(see page RS±84).
OK
Using simulation method, reproduce malfunction symptoms (see page IN±24).

H02757H10600H40103H23566
CG
TCDTC B1610/13
DLC3 Front Airbag
Sensor RHAirbag
Sensor
Assembly
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1163
1357 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
CAUTION:
Be sure to perform the following procedures before troubleshooting to avoid unexpected airbag de-
ployment.
(a) Turn the ignition switch to the LOCK position.
(b) Disconnect the negative (±) terminal cable from the battery, and wait for at least 90 seconds.
(c) Disconnect the connectors from the airbag sensor assembly.
(d) Disconnect the connectors from the steering wheel pad.
(e) Disconnect the connectors from the front passenger airbag assembly.
(f) w/ Side and curtain shield airbag:
Disconnect the connectors from the side airbag assembly LH and RH.
(g) w/ Side and curtain shield airbag:
Disconnect the connectors from the curtain shield airbag assembly LH and RH.
(h) Disconnect the connectors from the front seat outer belt LH and RH.
1 Check DTC.
PREPARATION:
(a) Connect the connectors to the airbag sensor assembly.
(b) Connect the negative (±) terminal cable to the battery,
and wait for at least 2 seconds.
CHECK:
(a) Turn the ignition switch to the ON position, and wait for at
least 60 seconds.
(b) Clear the DTCs stored in memory (see page DI±1147).
(c) Turn the ignition switch to the LOCK position.
(d) Turn the ignition switch to the ON position, and wait for at
least 60 seconds.
(e) Check the DTCs (see page DI±1147).
OK:
DTC B1610/13 is not output.
HINT:
Codes other than DTC B1610/13 may be output at this time, but
they are not related to this check.
NG Go to step 2.
OK
From the results of the above inspection, the malfunctioning part can now be considered normal.
To make sure of this, use the simulation method to check (see page DI±1137).

H03353H08016G27651H23623
Front Airbag
Sensor RHAirbag
Sensor
Assembly
+SR
±SR
A
B D F
E
C C
Service Wire
+SR ±SR
A20A12
DI±1164
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1358 Author: Date:
2005 SEQUOIA (RM1146U)
2 Check connection of connectors.
PREPARATION:
(a) Turn the ignition switch to the LOCK position.
(b) Disconnect the negative (±) terminal cable from the battery, and wait for at least 90 seconds.
CHECK:
Check that the connectors are properly connected to the airbag sensor assembly and the front airbag sensor
RH.
OK:
The connectors are connected securely.
NG Connect connectors, then go to step 1.
OK
3 Check front airbag sensor RH circuit (open).
PREPARATION:
(a) Disconnect the connectors from the airbag sensor as-
sembly and the front airbag sensor RH.
(b) Using a service wire, connect A12±2 (+SR) and A12±1
(±SR) of connector ºEº.
NOTICE:
Do not forcibly insert a service wire into the terminals of the
connector when connecting.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionConditionSpecified Condition
A20±29 (+SR) ±
A20±27 (±SR)AlwaysBelow 1 W
NG Go to step 8.
OK