2001 TOYOTA SEQUOIA brake

± DIAGNOSTICSENGINE
DI±53
247 Author: Date:
2005 SEQUOIA (RM1146U)A/C SIG
A/C signal: ON or OFFON: A/C ON'
ELECT LOAD SIGElectrical load signal:
ON or OFFON: Headlights or defogger is
turned ON'
STOP LIGHT SWStop lamp switch:
ON or OFFON: brake pedal is depressed.'
+BM
Whether or not electric throttle
control system power inputted:
ON or OFF
ON: Idling'
+BM VOLTAGE+BM voltage:
Min.: 0, Max.: 19.9210 to 15 V: IdlingETCS service data
BATTERY VOLTAGEBattery voltage:
Min.: 0 V, Max.: 65.535 V9 to 14 V: Idling'
ACTUATOR POWERActuator power supply:
ON or OFFON: IdlingETCS service data
ATM PRESSUREAtmospheric pressure:
Min.: 0 kPa, Max.: 150 kPaEquivalent to atmospheric pres-
sure (absolute pressure)'
SECOND AIR VSVSecondary air injection system
statusON: Secondary air injection sys-
tem operation'
ACT VSVA/C cut status for Active Test:
ON or OFF'Active Test support data
EVAP (Purge) VSVVSV status for EVAP control:
ON or OFF'Active Test support data
FUEL PUMP / SPDFuel pump/speed status:
ON or OFF'Active Test support data
VVT CTRL B1VVT control status:
ON or OFF'Active Test support data
VVT CTRL B2VVT control status:
ON or OFF'Active Test support data
VACUUM PUMP
Key±off EVAP system pump sta-
tus:
ON or OFF
'Active Test support data
EVAP VENT VAL
Key±off EVAP system vent valve
status:
ON or OFF
'Active Test support data
TC/TE1TC and TE1 terminal of DLC3:
ON or OFF''
VVTL AIM ANGL #1VVT aim angle (bank 1):
Min.: 0 %, Max.: 100 %0 %: IdlingVVT duty signal value during intru-
sive operation
VVTL AIM ANGL #2VVT aim angle (bank 1):
Min.: 0 %, Max.: 100 %0 %: IdlingVVT duty signal value during intru-
sive operation
VVT CHNG ANGL #1VVT change angle:
Min.: 0FR, Max.: 60FR0 to 5 FR: IdlingDisplacement angle during intru-
sive operation
VVT CHNG ANGL #2VVT change angle:
Min.: 0FR, Max.: 60FR0 to 5 FR: IdlingDisplacement angle during intru-
sive operation
VVT OCV DUTY B1VVT OCV operation duty:
Min.: 0 %, Max.: 100 %0 %: IdlingRequested duty value for intrusive
operation
VVT OCV DUTY B2VVT OCV operation duty:
Min.: 0 %, Max.: 100 %0 %: IdlingRequested duty value for intrusive
operation
FC IDLFuel cut idle:
ON or OFFON: Fuel cut operation
FC IDL = ºONº when throttle valve
fully closed and engine speed over
2,800 rpm

DI±66
± DIAGNOSTICSENGINE
260 Author: Date:
2005 SEQUOIA (RM1146U)P043E
(DI±445)
Evaporate Emission System
Reference Orifice Clog Up
Pump module
P043F
(DI±445)Evaporate Emission System
Reference Orifice High Flow
Pump module
P0441
(DI±257)Evaporative Emission Control
System Incorrect Purge Flow

Purge valve

Purge valve circuit (between purge valve and ECM)

Leakage from EVAP line (between purge valve and intake
manifold)

EVAP line (between purge valve and canister) clogged

ECM

P0450
(DI±264)Evaporative Emission Control
System Pressure Sensor/Switch
[Fuel Tank Pressure Sensor]

Pump module (including pressure sensor)
P0451
(DI±264)Evaporative Emission Control
System Pressure Sensor/Switch
Range/Performance

Pump module (including pressure sensor)
P0452
(DI±264)Evaporative Emission Control
System Pressure Sensor/Switch
Low Input
Pump module (including pressure sensor)

Connector/Wire harness (between pump module and ECM)

ECM

P0453
(DI±264)Evaporative Emission Control
System Pressure Sensor/Switch
High Input
Pump module (include pressure sensor)

Connector/Wire harness (between pump module and ECM)

ECM

P0455
(DI±273)Evaporative Emission Control
System Leak Detected (Gross
Leak)

Fuel tank cap (loose)

Leakage from EVAP line (between canister and fuel tank)

Leakage from EVAP line (between purge valve and canister)

Leakage from pump module

Leakage from fuel tank

Leakage from canister

P0456
(DI±273)Evaporative Emission Control
System Leak Detected (Very
Small Leak)

Same as DTC No. P0445
P0500
(DI±278)Vehicle Speed Sensor ºAº

Combination meter

Open or short in vehicle speed sensor circuit

Vehicle speed sensor

ECM

P0503
(DI±278)Vehicle Speed Sensor ºAº Inter-
mittent/Erratic/High

Combination meter

Open or short in vehicle speed sensor circuit

Vehicle speed sensor

ECM
±
P0504
(DI±283)Brake Switch ºAº/ºBº Correlation

Short in stop lamp switch signal circuit

STOP fuse

Stop lamp switch

ECM
±
P0505
(DI±288)Idle Air Control System

Air induction system

Electric throttle control system

PCV hose connection

P0560
(DI±292)System Voltage

Back±up power source circuit

EFI No. 1 fuse

ECM

P0604
(DI±296)Internal Control Module Random
Access Memory (RAM) Error
ECM
P0606
(DI±296)ECM/PCM Processor
ECM
P0607
(DI±296)Control Module Performance
ECM

± DIAGNOSTICSENGINE
DI±67
261 Author: Date:
2005 SEQUOIA (RM1146U)P0617
(DI±298)
Starter Relay Circuit High

Park/neutral position switch

Starter relay circuit

Ignition switch

ECM

P0630
(DI±302)VIN not Programmed or Mis-
match±ECM/PCM
ECM
P0657
(DI±296)Actuator Supply Voltage Circuit/
Open
ECM
P0705
(DI±576)Transmission Range Sensor Cir-
cuit Malfunction (PRNDL Input)
Electronic Controlled Automatic Transaxle (ECT)
P0710
(DI±582)Transmission Fluid Temperature
Sensor ºAº Circuit
Electronic control automatic transmission (ECT)
P0711
(DI±588)Transmission Fluid Temperature
Sensor ºAº Performance
Electronic control automatic transmission (ECT)
P0712
(DI±582)Transmission Fluid Temperature
Sensor ºAº Circuit Low Input
Electronic control automatic transmission (ECT)
P0713
(DI±582)Transmission Fluid Temperature
Sensor ºAº Circuit High Input
Electronic control automatic transmission (ECT)
P0717
(DI±591)Input/Turbine Speed Sensor ºAº
Circuit No Signal
Electronic control automatic transmission (ECT)
P0722
(DI±596)Output Speed Sensor Circuit No
Signal
Electronic control automatic transmission (ECT)
P0724
(DI±600)Brake Switch ºBº Circuit High
Electronic control automatic transmission (ECT)
P0748
(DI±603)Pressure Control Solenoid ºAº
Electrical (Shift Solenoid Valve
SL1)

Electronic control automatic transmission (ECT)
P0751
(DI±608)Shift Solenoid ºAº Performance
(Shift Solenoid Valve S1)
Electronic control automatic transmission (ECT)
P0756
(DI±614)Shift Solenoid ºBº Performance
(Shift Solenoid Valve S2)
Electronic control automatic transmission (ECT)
P0771
(DI±620)Shift Solenoid ºEº Performance
(Shift Solenoid Valve SR)
Electronic control automatic transmission (ECT)
P0776
(DI±625)Pressure Control Solenoid ºBº
Performance (Shift Solenoid
Valve SL2)

Electronic control automatic transmission (ECT)
P0778
(DI±631)Pressure Control Solenoid ºBº
Electrical (Shift Solenoid Valve
SL2)

Electronic control automatic transmission (ECT)
P0781
(DI±636)1±2 Shift (1±2 Shift Valve)
Electronic control automatic transmission (ECT)
P0973
(DI±641)Shift Solenoid ºAº Control Circuit
Low (Shift solenoid Valve S1)
Electronic control automatic transmission (ECT)
P0974
(DI±641)Shift Solenoid ºAº Control Circuit
High (Shift solenoid Valve S1)
Electronic control automatic transmission (ECT)
P0976
(DI±646)Shift Solenoid ºBº Control Circuit
Low (Shift solenoid Valve S2)
Electronic control automatic transmission (ECT)
P0977
(DI±646)Shift Solenoid ºBº Control Circuit
High (Shift solenoid Valve S2)
Electronic control automatic transmission (ECT)
P0985
(DI±651)Shift Solenoid ºEº Control Circuit
Low (Shift Solenoid Valve SR)
Electronic control automatic transmission (ECT)

DI±192
± DIAGNOSTICSENGINE
386 Author: Date:
2005 SEQUOIA (RM1146U)
1 Are there any other codes (besides DTC P0300, P0301, P0302, P0303, P0304
P0305, P0306, P0307 or P0308) being output?
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) When using hand±held tester, enter the following menu: DIAGNOSIS / ENHANCED OBD II / DTC
INFO / CURRENT CODES.
CHECK:
Read the DTCs using hand±held tester.
RESULT:
Display (DTC Output)Proceed to
ºP0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307 and/or
P0308ºA
ºP0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307 or
P0308º and other DTCsB
HINT:
If any other codes besides ºP0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307 or P0308º are
output, perform the troubleshooting for those DTCs.
B Go to relevant DTC chart (See page DI±58).
A
2 Check wire harness, connector and vacuum hose in engine room.
CHECK:
(a) Check the connection conditions of the wire harness and connector.
(b) Check for the disconnection, piping and brake of the vacuum hose.
NG Repair or replace, then confirm that there is no
misfire (See confirmation driving pattern).
OK

± DIAGNOSTICSENGINE
DI±283
477 Author: Date:
2005 SEQUOIA (RM1146U)
DTC P0504 Brake Switch ºAº/ºBº Correlation
CIRCUIT DESCRIPTION
In addition to turning on the stop lamps, the stop lamp switch signals are used for a variety of engine, trans-
mission, and suspension functions as well as being an input for diagnostic checks. It is important that the
switch operates properly, therefore this switch is designed with two complementary signal outputs: STP and
ST1±. The ECM analyzes these signal outputs to detect malfunctions in the stop lamp switch.
HINT:
Normal condition is as shown in the table.
SignalBrake pedal releasedIn transitionBrake pedal depressed
STPOFFONON
ST1±ONONOFF
DTC No.DTC Detection ConditionTrouble Area
P0504
Conditions (a), (b) and (c) continue for 0.5 sec. or more:
(a) Ignition switch ON
(b) Brake pedal released
(c) STP signal is OFF when the ST1± signal is OFF
Short in stop lamp switch signal circuit

Stop lamp fuse

Stop lamp switch

ECM
DID8C±01

I18
Ignition
SW
A23552
ECM
STOPSTP
ALT
BatteryE4
16 G±Y
J/C1 S14 Stop Light SW
2
G±W
BR7
Stop
Light
LH
R8
Stop
Light
RH3
5
8W±R
A W
High
Mounted
Stop Light
W±B 1L
1 1F
7
F10
Fusible
Link
BlockInstrument
Panel J/B1
4EG±Y
4B8
Brake Inhibit Relay
G±Y 4
See VSC System 2
W
J19
J/CB
C
IC
CC
C
4
BD1
1
22
1H9 H9(*1)
(*2) (*1)(*2)
BD2
12 J/C
A1
4
G±W IG2
*1: w/o Rear Spoiler
*2: w/ Rear Spoiler AM2
To Towing
Converter Relay
W±BST1±
E4 15
4C 4A1
1
3
L±B Sub J/B No.4
2
IGN1 B±O2
4D2
4A
1E 17
2 1C
1 A
J44J11
J/C J10
J
J33
J34 C
3
IJ
52C
2D 11
AM2
B W±RB±R
6
Instrument
Panel J/B
BP1
4 G±W B±O
G±W
G±W G±WSub J/B No.4
J10
J45
4
BJ J57
J/CA
W±BW±B G±W
High
Mounted
Stop LightG±WJ20
J/C G±W H
Engine Room
J/B DI±284
± DIAGNOSTICSENGINE
478 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM

± DIAGNOSTICSENGINE
DI±285
479 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
HINT:
Read freeze frame data using the hand-held tester. Freeze frame data records the engine conditions when
a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was
running or stopped, if the engine was warmed up or not, if the air±fuel ratio was lean or rich, as well as other
data from the time when a malfunction occurred.
1 Check operation of stop light.
CHECK:
Check if the stop lights come on and go off normally when the brake pedal is operated and released.
NG Check and repair stop light circuit.
OK
2 Check stop light switch (See page BE±47).
NG Replace stop light switch.
OK

B17446
Brake Pedal
DepressedBrake Pedal
Released ON
() ()
ST1±(+)E4
E6
E1(±)
DI±286
± DIAGNOSTICSENGINE
480 Author: Date:
2005 SEQUOIA (RM1146U)
3 Check STP signal and ST1± voltage.
PREPARATION:
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch ON.
(c) Select the item ºDIAGNOSIS / ENHANCED OBD II /
DATA LIST / ALL / STOP LIGHT SWº.
CHECK:
Read the signal displayed on the hand±held tester.
OK:
Standard:
Brake PedalSpecified Condition
DepressedSTP Signal ON
ReleasedSTP Signal OFF
CHECK:
Measure the voltage between the specified terminals of the E4
and E6 ECM connectors.
OK:
Standard:
Tester ConnectionBrake PedalSpecified Condition
ST1± (E4±12) ±
E1 (E6±1)DepressedBelow 1.5 V
ST1± (E4±12) ±
E1 (E6±1)Released7.5 to 14 V
OK Check for intermittent problems (See page
DI±11).
NG