2001 TOYOTA SEQUOIA ABS

F18920
DLC3
Ts
CG ON
(+) (±)
DI±1058
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1252 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check voltage between terminals Ts and CG of the DLC3.
CHECK:
(a) Turn the ignition switch to the ON position.
(b) Measure the voltage between terminals Ts and CG of the
DLC3.
OK:
Voltage: 10 to 14 V
OK If ABS warning light does not blink even after Ts
and CG are connected, the ECU may be defec-
tive.
NG
2 Check for open and short circuit in harness and connector between skid control
ECU and DLC3, DLC3 and body ground (See page IN±35).
NG Repair or replace harness or connector.
OK
Check and replace skid control ECU
(See page BR±52).
NOTICE:
When replacing the skid control ECU, perform the zero point calibration (See page DI±897).

F13441
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI±1059
1253 Author: Date:
2005 SEQUOIA (RM1146U)
Check for Fluid Leakage
Check actuators or hydraulic lines for fluid leakage.
DI94C±03

DID8Q±01
DI±1608
± DIAGNOSTICSCOMBINATION METER SYSTEM
1802 Author: Date:
2005 SEQUOIA (RM1146U)
SYSTEM DESCRIPTION
1. METER GAUGE AND WARNING/INDICATOR
GAUGE:
ItemDetail
SpeedometerVehicle speed sensor (Direct line).
TachometerECM transmits engine speed to the meter to display.
ODO/TRIP MeterCombination meter assy.
FuelDisplays a fuel level according to a signal from the fuel sender gauge (Direct line).
Water TemperatureDisplays engine coolant temperature according to a signal from the ECM (BEAN).
Oil PressureReceives a signal from the oil pressure sender (Direct line).
Volt MeterDisplays vehicle voltage according to a voltage from the IG terminal (Direct line).
WARNING/INDICATOR:
HINT:
Combination meter bulb check is performed for 3 seconds after the ignition switch is turned ON.
ItemDetailList of indicators available for
bulb check
O/D OFFReceives a signal from the ECM (Direct line)±
TURNTurns signal switch ON (Direct line)±
BEAMReceives a signal from the body ECU (*1), Displays a signal received from the
dimmer switch (*2) (Direct line)±
SECURITYReceives a set signal from the transponder key ECU and body ECU (Direct line)±
CHARGEReceives a malfunction signal from the alternator (Direct line)
AIR BAGReceives a malfunction signal from the airbag sensor center (Direct line)
D SEAT BELTReceives the driver seat belt signal (Unfastened) from the seat belt inner front LH
(Direct line)±
DOOROpen door indicator comes on when a signal is received from the ECU (BEAN)
from each door±
A/T OIL TEMP.Warning is displayed when the oil temperature is high (Direct line)
BRAKEComes on when the parking brake switch is on or the brake fluid level warning
switch is on (Direct line)
MIL (CHECK ENGINE)Receives a malfunction signal from the ECM (Direct line)
FUEL WARNINGReceives the fuel empty signal from the fuel sender gauge (Direct line)±
ABSReceives a malfunction signal from the skid control ECU (Direct line)
WASHERWarning is displayed when the washer level is low (Direct line)±
CRUISEReceives a CRUISE on signal or malfunction signal from the ECM (Direct line)±
VSC TRACReceives a malfunction signal from the skid control ECU (Direct line)
VSC (TRAC) OFFReceives a malfunction signal from the translate ECU (Direct line)
SLIPReceives a malfunction signal from the translate ECU (Direct line)
4HIReceives a 4HI signal from the 4WD control ECU (Direct line)±
CTR DIF LOCKReceives a DIF LOCK signal from the 4WD control ECU (Direct line)±
A/T PReceives a P signal from the park/neutral position switch (Direct line)±
A/T NReceives an N signal from the park/neutral position switch (Direct line)±
A/T DReceives a D signal from the park/neutral position switch (Direct line)±
A/T 3Receives a 3 signal from the park/neutral position switch (Direct line)±
A/T 2Receives a 2 signal from the park/neutral position switch (Direct line)±
A/T LReceives an L signal from the park/neutral position switch (Direct line)±

DID8U±01
DI±1614
± DIAGNOSTICSCOMBINATION METER SYSTEM
1808 Author: Date:
2005 SEQUOIA (RM1146U)
PROBLEM SYMPTOMS TABLE
HINT:
Inspect the related ºFuseº and ºRelayº before confirming the suspected area as shown in the table below.
MALFUNCTION SYSTEM:
SymptomSuspected AreaSee page
Entire combination meter does not operate.Refer to troubleshooting proceduresDI±1628
Operating light control rheostat does not change light brightness.Refer to troubleshooting proceduresDI±1645
Seat belt warning does not operate.Refer to troubleshooting proceduresDI±1650
Key reminder warning buzzer does not sound.
1. Multiplex communication system
2. Key unlock warning switch circuit
3. Door courtesy lamp switch circuit
4. Combination meter assyDI±1892
DI±1715
DI±1728
IN±35
METER GAUGES:
SymptomSuspected AreaSee page
Malfunction in speedometerRefer to troubleshooting proceduresDI±1632
Malfunction in tachometerRefer to troubleshooting proceduresDI±1636
Malfunction in fuel receiver gaugeRefer to troubleshooting proceduresDI±1640
Malfunction in engine coolant temperature receiver gaugeRefer to troubleshooting proceduresDI±1644
Malfunction in oil pressure receiver gaugeRefer to troubleshooting proceduresDI±1654
Malfunction in volt meterRefer to troubleshooting proceduresDI±1658
WARNING LIGHTS:
SymptomSuspected AreaSee page
Check engine warning light (MIL) does not come on.
1. ECM
2. Wire harness or connector
3. Combination meter assyDI±9
±
IN±35
Discharge warning light does not come on.
1. ECM
2. Wire harness or connector
3. Combination meter assyDI±9
±
IN±35
Brake warning light does not come on.
1. Skid control ECU
2. Wire harness or connector
3. Combination meter assyDI±895
±
IN±35
ABS warning light does not come on.
1. Skid control ECU
2. Wire harness or connector
3. Combination meter assyDI±895
±
IN±35
SRS warning light does not come on.
1. Airbag sensor assy
2. Wire harness or connector
3. Combination meter assyDI±1126
±
IN±35
Open door warning light does not come on.
1. Door courtesy light switch circuit
2. Wire harness or connector
3. Combination meter assy
4. Body ECUDI±1728
±
IN±35
IN±35
Fuel level warning light does not come on.
1. Refer to troubleshooting
2. Wire harness or connector
3. Combination meter assyDI±1640
±
IN±35
Low oil pressure warning light does not come on.
1. Low oil pressure warning switch
2. Wire harness or connector
3. Combination meter assyBE±55
±
IN±35

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

I27707
C6±21
C6±8
(*4) C5±15
C5±18
C5±2
C5±14
C5±19
C5±13
C6±1
C6±2
C6±3
C5±20ABS
CHARGE
A/T OIL TEMP
CHECK E/G
4LO O/D OFF
A/T L
WASHER
SLIP
VSC OFF
VSC TRAC
4HI CRUISE
ONE STEP
DIMMERC6±24
C6±5
C6±6
C6±4
C5±40TIRE PRS
CTR DIFF LOCK
RSCA OFF
SECURITY
P
R
NC5±16
C5±17
C5±34
C5±35
C5±36
C5±37
C5±38
C5±39
C6±17 (*5)
C6±18 (*6)
C5±33
C6±19 TURN (L) TURN (R) BEAM3
2 D
*4: 4WD *5: w/o Daytime Running Light *6: w/ Daytime Running LightONE STEP
DIMMERRSCA OFF
± DIAGNOSTICSCOMBINATION METER SYSTEM
DI±1623
1817 Author: Date:
2005 SEQUOIA (RM1146U)

DID9T±01
± DIAGNOSTICSAUDIO SYSTEM
DI±1979
2173 Author: Date:
2005 SEQUOIA (RM1146U)
DIAGNOSTIC TROUBLE CODE CHART
TermsMeaning
Physical addressThree±digit code (shown in hexadecimal) which is given to each component com-
prising the AVC±LAN.
Corresponding to the function, individual symbols are specified.
Logical addressTwo±digit code (shown in hexadecimal) which is given to each function comprising
the inner system of the AVC±LAN.
HINT:
Titles for each unit are stated in the following order: parts name (physical address) and [Name indicated on
the DTC display]
1. Radio receiver assy (physical address: 190) [AUDIO H/U]
(a) Logical address: 01 (Communication control)
DTCNameDiagnosisVerificationSee page
D6
*1Absence of Master
Component in which this code is recorded was
disconnected from system or master component
with ignition switch in ACC or ON.
1. Power source circuit (Stereo
component amplifier assy).
2. Power source circuit (Rear seat
audio controller). *6
3. Power source circuit (Multi±dis-
play controller sub±assy) *7
4. AVC±LAN circuit (Radio receiver
assy ± Stereo component ampli-
fier assy).
5. AVC±LAN (Radio receiver assy
± Rear seat audio controller). *6
6. AVC±LAN (Radio receiver assy
± Multi±display controller sub±
assy). *7
7. Replace stereo component am-
plifier assy.
8. Replace rear seat audio control-
ler. *6
9. Replace multi±display controller
sub±assy. *7DI±1993
DI±2058
DI±2110
DI±2023
DI±2061
DI±2139
±
±
±
D8
*2
*5No Response to Connection
CheckComponent shown by sub code is or was discon-
nected from system after engine start.
1. Power source circuit (Stereo
component amplifier assy).
2. Power source circuit (Rear seat
audio controller). *6
3. Power source circuit (Multi±dis-
play controller sub±assy) *7
4. AVC±LAN circuit (Radio receiver
assy ± Stereo component ampli-
fier assy).
5. AVC±LAN (Radio receiver assy
± Rear seat audio controller). *6
6. AVC±LAN (Radio receiver assy
± Multi±display controller sub±
assy). *7
7. Replace stereo component am-
plifier assy.
8. Replace rear seat audio control-
ler. *6
9. Replace multi±display controller
sub±assy. *7DI±1993
DI±2058
DI±2110
DI±2023
DI±2061
DI±2139
±
±
±

DI±1984
± DIAGNOSTICSAUDIO SYSTEM
2178 Author: Date:
2005 SEQUOIA (RM1146U)
2. Stereo component amplifier assy (physical address: 440) [DSP±AMP]
Logical address: 01 (Communication control)
DTCNameDiagnosisVerificationSee page
D6
*1Absence of Master
Component in which this code is recorded was
disconnected from system with ignition in ACC or
ON. Either that, or radio receiver assy was dis-
connected when this code was recorded.
1. Power source circuit (Radio re-
ceiver assy).
2. Power source circuit (Stereo
component amplifier assy).
3. AVC±LAN circuit (Radio receiver
assy ± Stereo component ampli-
fier assy).
4. AVC±LAN (Radio receiver assy
± Rear seat audio controller). *5
5. AVC±LAN (Radio receiver assy
± Multi±display controller sub±
assy). *6
6. Replace radio receiver assy.
7. Replace stereo component am-
plifier assy.DI±1990
DI±1993
DI±2023
DI±2061
DI±2139
±
±
D7Communication Check Error
Component in which this code is recorded is or
was disconnected from system after engine start.
Either that, or radio receiver assy was discon-
nected when this code was recorded.
1. Power source circuit (Radio re-
ceiver assy).
2. Power source circuit (Stereo
component amplifier assy).
3. AVC±LAN circuit (Radio receiver
assy ± Stereo component ampli-
fier assy).
4. AVC±LAN (Radio receiver assy
± Rear seat audio controller). *5
5. AVC±LAN (Radio receiver assy
± Multi±display controller sub±
assy). *6
6. Replace radio receiver assy.
7. Replace stereo component am-
plifier assy.DI±1990
DI±1993
DI±2023
DI±2061
DI±2139
±
±
DC
*2Transmission Error
Transmission to component shown by auxiliary
code failed.
(Detecting this DTC does not necessarily mean
actual failure.)If same auxiliary code is recorded in
other components, check harness
for power supply and communica-
tion system of all components
shown by code.
±
DD
*3Master Reset (Momentary Inter-
ruption)After engine was started, radio receiver assy was
disconnected from system.
1. Power source circuit (Radio re-
ceiver assy).
2. Power source circuit (Stereo
component amplifier assy).
3. AVC±LAN circuit (Radio receiver
assy ± Stereo component ampli-
fier assy).
4. AVC±LAN (Radio receiver assy
± Rear seat audio controller). *5
5. AVC±LAN (Radio receiver assy
± Multi±display controller sub±
assy). *6
6. Replace radio receiver assy.
7. Replace stereo component am-
plifier assy.DI±1990
DI±1993
DI±2023
DI±2061
DI±2139
±
±