2001 TOYOTA SEQUOIA terminals of DLC3

F16802
0.25 sec. 0.5 sec.
ON
OFF
0.25 sec.4.5 sec.
ON
OFF1.5 sec. Normal:
Code 82:
0.5 sec.
Repeat
± DIAGNOSTICSAIR SUSPENSION SYSTEM
DI±713
907 Author: Date:
2005 SEQUOIA (RM1146U)
HINT:

As examples, the blinking patterns of a normal system
code and code 82 are shown in the illustration.

If 2 or more malfunctions are indicated at the same time,
the lowest numbered code is displayed first.

When a DTC is not output, check the TC terminal circuit
on page DI±1567.
(9) Check the malfunction using the code table on the
next page.
(b) Ending the Input Signal Check Mode (Test Mode) using
SST check wire.
SST 09843±18040
(1) With the ignition switch OFF, disconnect the SST
check wire from the terminals of the DLC3 and then
turn the ignition switch to the ON position.
(c) Procedure for Sensor Test Mode (Test Mode) using the
hand±held tester.
(1) Make sure the ignition switch is OFF.
(2) Set each of the check items to the condition shown
under Operation (A) in the test mode table on the
previous page.
(3) Connect the hand±held tester to the DLC3.
(4) Turn the ignition switch to the ON position.
(5) Select SIGNAL CHECK mode on the hand±held
tester.
(6) Set each of the check items to the condition shown
under Operation (B) in the test mode table on the
previous page.
HINT:
In step (6), all signals can be checked together.
(7) Read the DTCs by following the prompts on the tes-
ter screen.
HINT:
Refer to the hand±held tester operator's manual for further de-
tails.

DIDDA±01
C00083
DLC3
CG TC
F16800
Height
Control
Manual
Indicator
Lamp
F16801
ON0.25 sec.
OFF
0.25 sec.
0.5 sec.
1.5 sec.4.5 sec. 2.5 sec.
0.5 sec. ON
OFF Normal:
Codes 13 and 33:
1.5 sec.
Repeat
C00083
DLC3
CG TC
± DIAGNOSTICSAIR SUSPENSION SYSTEM
DI±723
917 Author: Date:
2005 SEQUOIA (RM1146U)
DTC CHECK / CLEAR
1. DTC CHECK (USING SST CHECK WIRE)
(a) Checking DTCs using the SST check wire.
SST 09843±18040
(1) Using the SST, connect terminals TC and CG of the
DLC3.
(2) Turn the ignition switch to the ON position.
(3) Read and record any DTCs from the height control
manual indicator lamp on the combination meter.
As examples, the blinking patterns of a normal sys-
tem code and codes 13 and 33 are shown on the
left.
HINT:

If the height control manual indicator lamp does not show
any DTC or a normal system code, inspect the height con-
trol manual indicator lamp circuit
(See page DI±789).

The TC terminal circuit uses CAN for communication.
Therefore, if there are any malfunctions in the commu-
nication circuit, one or more DTCs in the CAN commu-
nication system is/are output.

If 2 or more malfunctions are indicated at the same time,
the lowest numbered DTC is displayed first.
(4) Refer to the Diagnostic Trouble Code Chart (See
page DI±729) for DTC information.
(5) After completing the check, remove the SST check
wire from the DLC3.
SST 09843±18040
(b) Clearing the DTCs using the SST check wire.
SST 09843±18040
(1) Using SST, connect terminals TC and CG of the
DLC3.
(2) Turn the ignition switch to the ON position.

F19437
Height Control Valve
Connector Front View:
32 1
F19457
Height Control Compressor
Connector Front View:
± DIAGNOSTICSAIR SUSPENSION SYSTEM
DI±759
953 Author: Date:
2005 SEQUOIA (RM1146U)
3 Inspect height control valve (Gate solenoid valve, Leveling solenoid valve) or
height control compressor (Exhaust solenoid valve).
When using hand±held tester:
PREPARATION:
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch ON, and push the hand±held tester main switch ON.
(c) Select the item ºLEVEL SOL REARº, ºGATE SOL REARº in the ACTIVE TEST, and operate it with the
hand±held tester.
AIR SUSPENSION:
ItemVehicle Condition / Test DetailsDiagnostic Note
LEVEL SOL REARTurn leveling solenoid valve / ON or OFFOperation sound of solenoid (clicking sound) can
be heard
GATE SOL REARTurn gate solenoid valve / ON or OFFOperation sound of solenoid (clicking sound) can
be heard
HINT:
The exhaust solenoid valve cannot be tested in ACTIVE TEST.
CHECK:
(a) Check whether the solenoid makes a sound.
(b) Check whether the height control solenoid valve has continuity (will vibrate).
OK:
The solenoid makes a sound, and the height control solenoid valve has continuity. (It will vi-
brate.)
When not using hand±held tester:
PREPARATION:
Disconnect the valve connector.
CHECK:
Check the operating sound of the valves when battery positive
voltage is applied to the terminals as shown below.
Solenoid valveBattery positiveBattery negative
Height control valve
(Gate solenoid valve)12
Height control valve
(Leveling solenoid valve)32
Height control compressor
(Exhaust solenoid valve)12
OK:
It make an operating sound (click).
HINT:

When a malfunction is found in the gate solenoid valve,
replace the leveling valve and the height control valve.

When a malfunction is found in the exhaust solenoid
valve, replace the height control compressor assy.

F19451
C6
Combination
MeterSuspension Control
ECU
I18
Ignition SW
Engine Room J/B Instrument Panel J/B B±O
W±R11
7 1H
1JIGN1
1C
1C32
B±RMAN. 24
13 LG11
S25 VN
5
IG2 AM2 6
W±R
B
Battery 1
2D AM2
2C1
B5 4F10
FL Block
± DIAGNOSTICSAIR SUSPENSION SYSTEM
DI±789
983 Author: Date:
2005 SEQUOIA (RM1146U)
Height Control Manual Indicator Lamp Circuit
CIRCUIT DESCRIPTION
When manual mode is selected by pressing the height control mode select switch, the manual indicator lamp
comes on. (For the wiring diagram of the height control mode select switch circuit, see page DI±778.) If the
suspension control ECU detects a problem, the height control manual indicator lamp blinks while suspend-
ing the height control function. At the same time, the suspension control ECU records a DTC in the memory.
Connect terminals TC and CG of the DLC3 to make the height control manual indicator lamp blink and output
DTCs.
WIRING DIAGRAM
DIDEN±01

DIDK4±01
D13491
DLC3:
CG TC
F19148
Combination Meter
Tire Pressure
Warning Lamp
F19128
ON0.25 sec.
OFF
0.25 sec.
0.5 sec.
1.5 sec.4.5 sec. 2.5 sec.
0.5 sec. ON
OFF Normal System Code:
Code 13 and 33:
1.5 sec.
Repeat
D05981DLC3
Hand±Held
Tester
DI±820
± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
1014 Author: Date:
2005 SEQUOIA (RM1146U)
DTC CHECK / CLEAR
1. DTC CHECK (USING SST CHECK WIRE)
(a) Check DTCs.
(1) Using the SST, connect terminals TC and CG of
DLC3.
SST 09843±18040
(2) Turn the ignition switch to the ON position.
(3) Read and record any DTCs from the tire pressure
warning lamp on the combination meter. Refer to
the illustration on the left for examples of a normal
system code and codes 13 and 33.
HINT:

If the tire pressure warning lamp does not blink any DTCs
or the normal system code, inspect the tire pressure
warning lamp circuit or TC terminal circuit.
Trouble AreaSee page
Tire pressure warning lamp circuitDI±873
TC terminal circuitDI±888

If 2 or more malfunctions are indicated at the same time,
the lowest numbered DTC is displayed first.
(4) Refer to the Diagnostic Trouble Code Chart (see
page DI±825) for DTC information.
(5) After completing the check, turn the ignition switch
off and remove the SST from DLC3.
SST 09843±18040
2. DTC CHECK (USING HAND±HELD TESTER)
(a) Check DTCs.
(1) Connect the hand±held tester to the DLC3.
(2) Turn the ignition switch to the ON position.
(3) Read the DTCs following the prompts on the tester
screen.
HINT:
Refer to the hand±held tester operator's manual for further de-
tails.

F19174
Combination MeterTire Pressure
Monitor ECU
Engine Room J/B I18
Ignition SW IGN1
B±O
IG2 AM2 1C11
Battery 2
1H
T17 C5GR±L
Tire Pressure
B±R
B 56
54AM2 24
6IND Instrument Panel J/B
C620
2D1
2C1 1C3
1J7
F10
Fusible Link BlockInstrument Panel J/B
W±R
W±R
B
± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
DI±873
1067 Author: Date:
2005 SEQUOIA (RM1146U)
Tire Pressure Warning Lamp Circuit
CIRCUIT DESCRIPTION
If the ECU detects trouble, the tire pressure warning lamp comes on and tire pressure monitor is cancelled
at the same time. At this time, the ECU records a DTC in memory.
Connect terminals Tc and CG of the DLC3 to make the tire pressure warning lamp blink and output the DTC.
WIRING DIAGRAM
DIDKF±01

F19795
A20
Airbag Sensor
AssemblySub J/B No.4Tire Pressure
Monitor ECU
T5 Translate ECU
D6
DLC3TC
E4P±B P±B
TC
P±B
13
TC
TCP±B
GT17
4D5
1A94A5
4C
5 4E5 ECM
23
4B
5
CG4
J43
J/CO
15
1F
O 15A
IGA12
TC
Instrument Panel J/BP±B DI±888
± DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
1082 Author: Date:
2005 SEQUOIA (RM1146U)
Tc and CG Terminal Circuit
CIRCUIT DESCRIPTION
DTC output mode is set by connecting terminals TC and CG of the DLC3.
The DTCs are indicated by blinking of the tire pressure warning lamp.
WIRING DIAGRAM
HINT:
When each warning lamp stays blinking, a ground short in the wiring of terminal TC of the DLC3 or an internal
ground short in each ECU is suspected.
DIDKK±01

DIDLY±01
F09750
DLC3
Ts
Tc
CG
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI±897
1091 Author: Date:
2005 SEQUOIA (RM1146U)
CALIBRATION
1. ZERO POINT CALIBRATION OF MASTER CYLINDER
PRESSURE, YAW RATE AND DECELERATION SEN-
SORS
HINT:
When having replaced the master cylinder pressure, yaw rate
and deceleration sensors and/or the ECU, make sure to per-
form master cylinder pressure, yaw rate and deceleration sen-
sors' zero point calibration.
NOTICE:

While obtaining the zero point, do not vibrate the ve-
hicle by tilting, moving or shaking it and keep it in a
stationary condition. (Do not start the engine.)

Be sure to do this on a level surface (within an inclina-
tion of 1 degree).
(a) Perform master cylinder pressure, yaw rate and decelera-
tion sensors zero point calibration.
(1) Using SST, connect terminals Ts and CG of the
DLC3.
SST 09843±18040
(2) Shift the shift lever to the P position.
(3) Turn the ignition switch to the ON position.
(4) Keep the vehicle in a stationary condition on a level
surface for 4 sec. or more.
(5) Keep your foot off the brake pedal.
Do not leave 4WD vehicles in the L4 position.
(6) Press the center diff. lock (TRAC OFF) switch 3
times within 3 seconds.
(7) Check that the VSC buzzer sounds for 3 seconds.
HINT:

If the VSC buzzer does not sound, do the zero point cal-
ibration again and/or check the VSC buzzer circuit (See
page DI±1052).

If the VSC buzzer does not sound, check for yaw rate and
deceleration sensor failure (See page DI±911).
(8) Turn the ignition switch OFF.
(9) Disconnect terminals Ts and CG of the DLC3.
(b) Perform steering angle sensor zero point calibration.
This calibration is carried out automatically by following
procedures below:
(1) Make sure the system is not in sensor check mode.
(2) Calibrate the steering angle sensor by driving the
vehicle in a straight line at more than 7 MPH (12
km/h) for 5 seconds.