2001 TOYOTA SEQUOIA height

DI±790
± DIAGNOSTICSAIR SUSPENSION SYSTEM
984 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Inspect height control manual indicator lamp.
PREPARATION:
Turn the ignition switch to the ON position.
CHECK:
Check that the height control manual indicator lamp comes on.
OK:
Height control manual indicator lamp comes on, and then goes off after 2 seconds.
NG Go to combination meter
(See page DI±1610).
OK

DIDI6±01
Action when unable to communicateDTC detection
(Driver detectable)
Suspension
Control ECUVSC/TRC function stops
[When unable to communicate with ECM]
Function stops (Vehicle height cannot be changed until the ignition
switch is turned off)
[When unable to communicate with Translate ECU]
Vehicle height is maintained at the normal level until the ignition
switch is turned off. If communication is still impossible even after
the ignition switch is turned on again, the same height is maintained.Not detectable
( )
Not detectable
(VSC warning lamp
comes on)
Detectable
(Only DTCs are stored) ECMTranslate ECU
Suspension Control ECU
Rx
TxTx
Rx
Tx TxTx
Rx

ECM
Translate ECU DI±1074
± DIAGNOSTICSCAN COMMUNICATION SYSTEM
1268 Author: Date:
2005 SEQUOIA (RM1146U)
FAIL±SAFE CHART
1. FAIL±SAFE FUNCTION
(a) When communication fails in any of the CAN bus lines (communication lines) due to a short circuit or
any other cause, the fail±safe function, which is specified for each system, operates to prevent the
system from malfunctioning.
(b) Effects on each system when communication is impossible are as follows.
HINT:

Rx: Reception from each ECU.

Tx: Transmission to each ECU.

DIDGK±01
A08841
Hand±held Tester
DLC3
DI±1128
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1322 Author: Date:
2005 SEQUOIA (RM1146U)
INITIALIZATION
ZERO POINT CALIBRATION AND SENSITIVITY CHECK
NOTICE:
Make sure that the seat is not occupied before performing
the operation.
HINT:
Perform the zero point calibration and sensitivity check if any of
the following conditions occur.

The occupant classification ECU is replaced.

Accessories (seatback tray and seat cover, etc.) are
installed.

The passenger seat is removed from the vehicle.

The passenger airbag ON/OFF indicator (ºOFFº) comes
on when the passenger seat is not occupied.

The vehicle is brought to the workshop for repair due to
an accident or a collision.
Zero point calibration and sensitivity check procedures.
HINT:
Make sure that zero point calibration has finished normally, and
then perform the sensitivity check.
(1) Adjust the seat position according to the table be-
low.
Adjustment ComponentPosition
Slide DirectionRearmost position
Reclining AngleUpright position
Headrest HeightLowest position
Lifter HeightLowest position
(2) Connect the hand±held tester to the DLC3.
(3) Turn the ignition switch to the ON position.
(4) Perform the zero point calibration by following the
prompts on the tester screen shown in 2 pages lat-
er.
HINT:
Refer to the hand±held tester operator's manual for further de-
tails.
OK:
The ºCOMPLETEº is displayed.

± DIAGNOSTICSCOMBINATION METER SYSTEM
DI±1615
1809 Author: Date:
2005 SEQUOIA (RM1146U) Seat belt warning lamp for driver's seat does not operate.
Refer to troubleshooting proceduresDI±1650
SLIP warning light does not come on.
1. SLIP warning light circuit
2. Wire harness and connector
3. Combination meter assy
4. Skid control ECUDI±1041
±
IN±35
IN±35
INDICATOR LIGHTS:
SymptomSuspected AreaSee page
Turn indicator light does not come on.
1. Turn signal flasher relay
2. Wire harness or connector
3. Combination meter assyBE±36
±
IN±35
High beam indicator light does not come on.
1. Headlight dimmer switch (*1)
Headlight dimmer switch circuit (*2)
2. Wire harness or connector
3. Combination meter assyBE±27
DI±1755
±
IN±35
Washer level indicator light does not come on.
1. Washer level warning switch
2. Wire harness or connector
3. Combination meter assyBE±49
±
IN±35
Tire pressure indicator light does not come on.
1. Tire pressure monitor ECU
2. Wire harness or connector
3. Combination meter assyDI±873
±
IN±35
CRUISE main indicator light does not come on.
1. CRUISE main indicator light circuit
2. Cruise main control switch circuit
3. Wire harness or connector
4. Combination meter assyDI±1557
DI±1561
±
IN±35
VSC OFF indicator light does not come on.1. VSC OFF indicator light circuit
2. Combination meter assyDI±1048
IN±35
VSC TRAC indicator light does not come on.1. VSC TRAC indicator light circuit
2. Combination meter assyDI±1027
IN±35
Security indicator light does not come on.1. Security indicator light circuit
2. Combination meter assyDI±1731
IN±35
4HI indicator light does not come on.
1. Wire harness and connector
2. Combination meter assy
3. 4WD control ECU±
IN±35
IN±35
4LO indicator light does not come on.
1. Wire harness and connector
2. Combination meter assy
3. 4WD control ECU±
IN±35
IN±35
CTR DIF LOCK indicator light does not come on.
1. Wire harness and connector
2. Combination meter assy
3. 4WD control ECU±
IN±35
IN±35
Height control indicator lamp does not come on.1. Height control indicator lamp circuit
2. Combination meter assyDI±785
IN±35
Height control manual indicator lamp does not come on.1. Height control manual indicator lamp circuit
2. Combination meter assyDI±789
IN±35
A/T indicator light does not come on.
1. Park/neutral position switch circuit
2. Wire harness and connector
3. Combination meter assyDI±576
±
IN±35
*1: w/o Day time running light
*2: w/ Day time running light
OTHERS:
SymptomSuspected AreaSee page
All buzzers (key reminder, seat belt) do not operate.Combination meter assyIN±35

± DIAGNOSTICSCOMBINATION METER SYSTEM
DI±1619
1813 Author: Date:
2005 SEQUOIA (RM1146U) C5±37 ± Body ground
W±R ± Body
groundA/T shift position signal
(D)A/T D indicator ON10 to 14 V
C5±38 ± Body groundL ± Body groundA/T shift position signal
(3)A/T 3 indicator OFFBelow 1 V
C5±38 ± Body groundL ± Body groundA/T shift position signal
(3)A/T 3 indicator ON10 to 14 V
C5±39 ± Body groundLG ± Body
groundA/T shift position signal
(2)A/T 2 indicator OFFBelow 1 V
C5±39 ± Body groundLG ± Body
groundA/T shift position signal
(2)A/T 2 indicator ON10 to 14 V
C5±40 ± Body groundB±R ± Body
groundRSCA OFF signalRSCA OFF indicator light OFFBelow 1 V
C5±40 ± Body groundB±R ± Body
groundRSCA OFF signalRSCA OFF indicator light ON8 to 14 V
C6±1 ± Body groundW±R ± Body
groundSLIP signalSLIP indicator light ONBelow 1 V
C6±1 ± Body groundW±R ± Body
groundSLIP signalSLIP indicator light OFF10 to 14 V
C6±2 ± Body groundR±G ± Body
groundVSC OFF signal (*1)
TRAC OFF signal (*5)VSC OFF indicator light ON (*1)
TRAC OFF indicator light ON (*5)Below 1 V
C6±2 ± Body groundR±G ± Body
groundVSC OFF signal (*1)
TRAC OFF signal (*5)VSC OFF indicator light OFF (*1)
TRAC OFF indicator light OFF (*5)10 to 14 V
C6±3 ± Body groundP±L ± Body
groundTRAC signalVSC/TRAC indicator light ONBelow 1 V
C6±3 ± Body groundP±L ± Body
groundTRAC signalVSC/TRAC indicator light OFF10 to 14 V
C6±4 ± Body groundBR±Y ± Body
groundCTR DIFF LOCK signalCTR DIFF LOCK indicator light ONBelow 1 V
C6±4 ± Body groundBR±Y ± Body
groundCTR DIFF LOCK signalCTR DIFF LOCK indicator light OFF10 to 14 V
C6±5 ± Body groundY±B ± Body
ground4HI signal4HI indicator ONBelow 1 V
C6±5 ± Body groundY±B ± Body
ground4HI signal4HI indicator OFF10 to 14 V
C6±6 ± Body groundG±W ± Body
ground4LO signal4LO indicator ONBelow 1 V
C6±6 ± Body groundG±W ± Body
ground4LO signal4LO indicator OFF10 to 14 V
C6±8 ± Body groundY ± Body groundCharge signalEngine runningBelow 1 V
C6±8 ± Body groundY ± Body groundCharge signalEngine stopped10 to 14 V
C6±10 ± Body groundY±R ± Body
groundGround (Speed)AlwaysBelow 1 V
C6±11 ± Body groundY±B ± Body
groundGround (Fuel sender
gauge)AlwaysBelow 1 V
C6±12 ± Body groundBR ± Body
groundGroundAlwaysBelow 1 V
C6±13 ± Body groundLG ± Body
groundHeight control indicator
lamp signal (MAN.)Height control indicator lamp MAN.
Indicator light ONBelow 1 V
C6±13 ± Body groundLG ± Body
groundHeight control indicator
lamp signal (MAN.)Height control indicator lamp MAN.
Indicator light OFF10 to 14 V

I28567
GND DI±1620
± DIAGNOSTICSCOMBINATION METER SYSTEM
1814 Author: Date:
2005 SEQUOIA (RM1146U) C6±14 ± Body ground
P ± Body groundHeight control indicator
lamp signal (LO)Height control indicator lamp LO,
Indicator light ONBelow 1 V
C6±14 ± Body groundP ± Body groundHeight control indicator
lamp signal (LO)Height control indicator lamp LO,
Indicator light OFF10 to 14 V
C6±15 ± Body groundB±L ± Body
groundHeight control indicator
lamp signal (N)Height control indicator lamp N, In-
dicator light ONBelow 1 V
C6±15 ± Body groundB±L ± Body
groundHeight control indicator
lamp signal (N)Height control indicator lamp N, In-
dicator light OFF10 to 14 V
C6±16 ± Body groundGR±R ± Body
groundHeight control indicator
lamp signal (HI)Height control indicator lamp HI, In-
dicator light ONBelow 1 V
C6±16 ± Body groundGR±R ± Body
groundHeight control indicator
lamp signal (HI)Height control indicator lamp HI, In-
dicator light OFF10 to 14 V
C6±17 (*3) ± Body groundR±G ± Body
groundHi±Beam signalHi±Beam OFFBelow 1 V
C6±17 (*3) ± Body groundR±G ± Body
groundHi±Beam signalHi±Beam ON10 to 14 V
C6±18 (*4) ± Body groundGR±L ± Body
groundHi±Beam signalHi±Beam OFFBelow 1 V
C6±18 (*4) ± Body groundGR±L ± Body
groundHi±Beam signalHi±Beam ON10 to 14 V
C6±19 ± Body groundG±B ± Body
groundTurn signal (L)Ignition switch ON, turn signal LH
indicator OFFBelow 1 V
C6±19 ± Body groundG±B ± Body
groundTurn signal (L)Ignition switch ON, turn signal LH
indicator ON10 to 14 V
C6±21 ± Body groundR±W ± Body
groundABS signalABS warning light ON6.7 to 12 V
C6±21 ± Body groundR±W ± Body
groundABS signalABS warning light OFFBelow 1 V
C6±23 ± Body groundW±R ± Body
groundBatteryAlways10 to 14 V
C6±24 ± Body groundB±O ± Body
groundIgnition switch signal (ON)Ignition switch OFFBelow 1 V
C6±24 ± Body groundB±O ± Body
groundIgnition switch signal (ON)Ignition switch ON10 to 14 V
*1: 4WD
*2: w/ Driving position memory
*3: w/o Daytime running light
*4: w/ Daytime running light
*5: 2WD
Waveform 1 (Reference):
ConditionGauge set
Engine idle speed5 V/DIV, 10 ms/DIV

EM0801
EM0281
A05912
EM2011
± ENGINE MECHANICALCYLINDER HEAD
EM±51
2630 Author: Date:
2005 SEQUOIA (RM1146U)
(b) Using vernier calipers, measure the free length of the
valve spring.
Free length: 54.1 mm (2.130 in.)
If the free length is not as specified, replace the valve spring.
(c) Using a spring tester, measure the tension of the valve
spring at the specified installed length.
Installed tension:
210 to 226 N (21.4 to 23.0 kgf, 47.2 to 50.7 lbf)
at 35.0 mm (1.378 in.)
If the installed tension is not as specified, replace the valve
spring.
14. INSPECT CAMSHAFT FOR RUNOUT
(a) Place the camshaft on V±blocks.
(b) Using a dial indicator, measure the circle runout at the
center journal.
Maximum circle runout: 0.03 mm (0.0012 in.)
If the circle runout is greater than maximum, replace the cam-
shaft.
15. INSPECT CAM LOBES
Using a micrometer, measure the cam lobe height.
Standard cam lobe height:
Intake42.61 to 42.71 mm (1.6776 to 1.6815 in.)
Exhaust42.63 to 42.73 mm (1.6783 to 1.6823 in.)
Minimum cam lobe height:
Intake42.46 mm (1.6717 in.)
Exhaust42.48 mm (1.6724 in.)
If the cam lobe height is less than minimum, replace the cam-
shaft.

A05709
SST
A03199A03200
Sharp 5.5 mm Reamer
A04107
Pry
ClawBend
A04108
SST
SST Return
ClawDownward
± ENGINE MECHANICALCYLINDER HEAD
EM±57
2636 Author: Date:
2005 SEQUOIA (RM1146U)
(f) Using SST and a hammer, tap in a new guide bushing to
the specified protrusion height.
Protrusion height:
Intake9.2 to 9.8 mm (0.362 to 0.386 in.)
Exhaust8.2 to 8.8 mm (0.323 to 0.346 in.)
SST 09201±01055, 09950±70010 (09951±07100)
(g) Using a sharp 5.5 mm reamer, ream the guide bushing
to obtain the standard specified clearance (see page
EM±46) between the guide bushing and valve stem.
2. REPLACE SPARK PLUG TUBE GASKETS
(a) Bend the 4 ventilation case claws installed on the cylinder
head cover to an angle of 90° or more.
(b) Using a screwdriver, pry out the gasket.
NOTICE:
Be careful not to damage the cylinder head cover. Tape the
screwdriver tip.
(c) Using SST and a hammer, tap in a new gasket until its sur-
face is flush with the upper edge of the cylinder head cov-
er.
SST 09950±60010 (09951±00240, 09951±00440,
09952±06010), 09950±70010 (09951±07100)
NOTICE:
Be careful of the installation direction.
(d) Apply a light coat of MP grease to the gasket lip.
(e) Return the 4 ventilation case claws to its original position.