2001 TOYOTA SEQUOIA Service Repair Manual

coolant ECO mode ESP inoperative low beam seat memory coolant capacity

Page 249 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual ± DIAGNOSTICSENGINE
DI±55
249 Author: Date:
2005 SEQUOIA (RM1146U)DIST DTC CLEAR
Distance after DTC cleared:
Min.: 0 km/h, Max.: 65535 km/hEquivalent to drive distance after
DTCs were erased
WU

± DIAGNOSTICSENGINE
DI±55
249 Author: Date:
2005 SEQUOIA (RM1146U)DIST DTC CLEAR
Distance after DTC cleared:
Min.: 0 km/h, Max.: 65535 km/hEquivalent to drive distance after
DTCs were erased'
WU CYC DTC CLEARWarm±up cycle after DTC cleared:
Min.: 0, Max.: 255'Number of warm±up cycles after
DTC cleared
MODEL CODEModel code:'Identifying the model code:
UCK30 (2WD), UCK40 (4WD)
ENGINE TYPEEngine type:'Identifying the engine type:
2UZFE
CYLINDER NUMBERCylinder number:
Min.: 0, Max.: 255'Identifying the cylinder number:
8
TRANSMISSIONTransmission type:'Identifying the transmission type:
ECT(5AT)
DESTINATIONDestination'Identifying the destination:
A (America)
MODEL YEARModel year:
Min.: 0, Max.: 255'Identifying the model year:
200#
SYSTEMSystem identification'Identifying the engine system:
GASLIN (gasoline engine)
AI STATUSAI operation prohibit:
OK or NGOK
*1: If no idling conditions are specified, the transmission gear selector lever should be in the N or P position,
and the A/C switch and all accessory switches should be OFF.
2. ACTIVE TEST
HINT:
Performing an ACTIVE TEST enables components including the relays, VSV (Vacuum Switching Valve),
and actuators, to be operated without removing any parts. The ACTIVE TEST can be performed with a
hand±held tester. Performing an ACTIVE TEST as the first step of troubleshooting is one method of shorten-
ing diagnostic time.
DATA LIST can be displayed during ACTIVE TESTs.
(a) Connect a hand±held tester to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the tester ON.
(d) Select the following menu items: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST.
(e) Perform the ACTIVE TEST by referring to the table below.
Hand±held Tester DisplaysTest DetailsControl RangesDiagnostic Notes
INJ VOLChange injection volumeBetween ±12 % and 25 %
All injectors tested at the same
time
Perform test at less than 3,000
rpm
Injection volume can be changed
in 1 % graduations within control
range
A/F CONTROLChange injection volumeLower by 12.5 % or increase by 25
%
Perform test at less than 3,000
rpm
A/F CONTROL enables checking
and graphing of A/F (Air Fuel Ra-
tio) sensor and Heated Oxygen
(HO2) sensor voltage outputs
To conduct test, select following
menu items: ACTIVE TEST / A/F
CONTROL / USER DATA / AFS
B1S1 and O2S B1S2, and press
YES and ENTER followed by F4
EVAP VSV (ALONE)Activate EVAP VSV controlON/OFF±

Page 250 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual DI±56
± DIAGNOSTICSENGINE
250 Author: Date:
2005 SEQUOIA (RM1146U) VVT CTRL B1
Turn on and off OCV
(Oil Control Valve)ON/OFF
Engine stalls or idles roughly
when OCV turned ON
Normal engine ru

Page 251 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual ± DIAGNOSTICSENGINE
DI±57
251 Author: Date:
2005 SEQUOIA (RM1146U)
3. SYSTEM CHECK
HINT:
Performing a SYSTEM CHECK enables the system, which consists of multiple actuators, to be operated
withou

Page 252 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual DI3HB±12
DI±58
± DIAGNOSTICSENGINE
252 Author: Date:
2005 SEQUOIA (RM1146U)
DIAGNOSTIC TROUBLE CODE CHART
HINT:
Parameters listed in the chart may not be exactly the same as your reading due to

DI3HB±12
DI±58
± DIAGNOSTICSENGINE
252 Author: Date:
2005 SEQUOIA (RM1146U)
DIAGNOSTIC TROUBLE CODE CHART
HINT:
Parameters listed in the chart may not be exactly the same as your reading due to the type of instrument
or other factors.
If a malfunction code is displayed during the DTC check in check mode, check the circuit for the codes listed
in the table below. For details of each code, refer to the ºSee pageº under the respective ''DTC No.'' in the
DTC chart.
DTC No.
(See page)Detection ItemTrouble AreaMIL*1Memory
P0010
(DI±73)Camshaft Position ºAº Actuator
Circuit (Bank 1)Open or short in OCV circuit
OCV
ECM

P0011
(DI±79)Camshaft Position ºAº ±Timing
Over± Advanced or System Per-
formance (Bank 1)Valve timing
OCV
VVT controller assembly
ECM

P0012
(DI±79)Camshaft Position ºAº ±Timing
Over± Retarded (Bank 1)
Valve timing
OCV
VVT controller assembly
ECM

P0016
(DI±85)Crankshaft Position ± Camshaft
Position Correlation (Bank 1
Sensor A)Open or short in VVT sensor circuit
VVT sensor
ECM

P0018
(DI±85)Crankshaft Position ± Camshaft
Position Correlation (Bank 2
Sensor A)Open or short in VVT sensor circuit
VVT sensor
ECM

P0020
(DI±73)Camshaft Position ºAº Actuator
Circuit (Bank 2)Open or short in OCV circuit
OCV
ECM

P0021
(DI±79)Camshaft Position ºAº ±Timing
Over± Advanced or System Per-
formance (Bank 2)Valve timing
OCV
VVT controller assembly
ECM

P0022
(DI±79)Camshaft Position ºAº ±Timing
Over± Retarded (Bank 2)
Valve timing
OCV
VVT controller assembly
ECM

P0031
(DI±88)Oxygen (A/F) Sensor Heater
Control Circuit Low (Bank 1 Sen-
sor 1)Open in heater circuit of A/F sensor
A/F sensor heater
A/F relay
ECM

P0032
(DI±88)Oxygen (A/F) Sensor Heater
Control Circuit High (Bank 1
Sensor 1)Short in heater circuit of A/F sensor
A/F sensor heater
A/F relay
ECM

P0037
(DI±93)Oxygen Sensor Heater Control
Circuit Low (Bank 1 Sensor 2)
Open in heater circuit of heated oxygen sensor
Heated oxygen sensor heater
EFI relay
ECM

P0038
(DI±93)Oxygen Sensor Heater Control
Circuit High (Bank 1 Sensor 2)
Short in heater circuit of heated oxygen sensor
Heated oxygen sensor heater
EFI relay
ECM

Page 253 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual ± DIAGNOSTICSENGINE
DI±59
253 Author: Date:
2005 SEQUOIA (RM1146U)P0051
(DI±88)
Oxygen (A/F) Sensor Heater
Control Circuit Low (Bank 2 Sen-
sor 1)Open in heater circuit of A/F sensor
A/F sens

± DIAGNOSTICSENGINE
DI±59
253 Author: Date:
2005 SEQUOIA (RM1146U)P0051
(DI±88)
Oxygen (A/F) Sensor Heater
Control Circuit Low (Bank 2 Sen-
sor 1)Open in heater circuit of A/F sensor
A/F sensor heater
A/F relay
ECM

P0052
(DI±88)Oxygen (A/F) Sensor Heater
Control Circuit High (Bank 2
Sensor 1)Short in heater circuit of A/F sensor
A/F sensor heater
A/F relay
ECM

P0057
(DI±93)Oxygen Sensor Heater Control
Circuit Low (Bank 2 Sensor 2)
Open in heater circuit of heated oxygen sensor
Heated oxygen sensor heater
EFI relay
ECM

P0058
(DI±93)Oxygen Sensor Heater Control
Circuit High (Bank 2 Sensor 2)
Short in heater circuit of heated oxygen sensor
Heated oxygen sensor heater
EFI relay
ECM

P0100
(DI±102)Mass or Volume Air Flow Circuit
Open or short in mass air flow meter circuit
Mass air flow meter
ECM

P0101
(DI±110)Mass or Volume Air Flow Circuit
Range/Performance ProblemMass air flow meter
P0102
(DI±102)Mass or Volume Air Flow Circuit
Low InputOpen or short in mass air flow meter circuit
Mass air flow meter
ECM

P0103
(DI±102)Mass or Volume Air Flow Circuit
High InputOpen or short in mass air flow meter circuit
Mass air flow meter
ECM

P0110
(DI±113)Intake Air Temperature Circuit
Open or short in intake air temperature sensor circuit
Intake air temperature sensor (built in mass air flow meter)
ECM

P0112
(DI±113)Intake Air Temperature Circuit
Low InputOpen or short in intake air temperature sensor circuit
Intake air temperature sensor (built in mass air flow meter)
ECM

P0113
(DI±113)Intake Air Temperature Circuit
High InputOpen or short in intake air temperature sensor circuit
Intake air temperature sensor (built in mass air flow meter)
ECM

P0115
(DI±119)Engine Coolant Temperature Cir-
cuitOpen or short in engine coolant temperature sensor circuit
Engine coolant temperature sensor
ECM

P0116
(DI±125)Engine Coolant Temperature Cir-
cuit Range/Performance Prob-
lem
Engine coolant temperature sensor
P0117
(DI±119)Engine Coolant Temperature Cir-
cuit Low InputOpen or short in engine coolant temperature sensor circuit
Engine coolant temperature sensor
ECM

P0118
(DI±119)Engine Coolant Temperature Cir-
cuit High InputOpen or short in engine coolant temperature sensor circuit
Engine coolant temperature sensor
ECM

P0120
(DI±127)Throttle/Pedal Position Sensor/
Switch ºAº CircuitOpen or short in throttle control motor and sensor circuit
Throttle control motor and sensor
ECM

P0121
(DI±137)Throttle/Pedal Position Sensor/
Switch ºAº Circuit Range/Perfor-
mance Problem
Throttle control motor and sensor

Page 254 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual DI±60
± DIAGNOSTICSENGINE
254 Author: Date:
2005 SEQUOIA (RM1146U)P0122
(DI±127)
Throttle/Pedal Position Sensor/
Switch ºAº Circuit Low Input
Short in throttle control motor and sensor circu

DI±60
± DIAGNOSTICSENGINE
254 Author: Date:
2005 SEQUOIA (RM1146U)P0122
(DI±127)
Throttle/Pedal Position Sensor/
Switch ºAº Circuit Low Input
Short in throttle control motor and sensor circuit
Throttle control motor and sensor
Short in VTA1 circuit
Open in VC circuit
ECM

P0123
(DI±127)Throttle/Pedal Position Sensor/
Switch ºAº Circuit High Input
Open in throttle control motor and sensor circuit
Throttle control motor and sensor
Open in VTA1 circuit
Open in E2 circuit
VC and VTA1 circuit are short±circuited
ECM

P0125
(DI±139)Insufficient Coolant Temperature
for Closed Loop Fuel ControlCooling system
Engine coolant temperature sensor
Thermostat

P0128
(DI±142)Coolant Thermostat (Coolant
Temperature Below Thermostat
Regulating Temperature)Thermostat
Cooling system
Engine coolant temperature sensor
ECM
P0136
(DI±146)Oxygen Sensor Circuit Malfunc-
tion (Bank 1 Sensor 2)
Open or short in HO2 sensor (sensor 2) circuit
HO2 sensor (sensor 2)
HO2 sensor heater (sensor 2)
Air±Fuel Ratio (A/F) sensor (sensor 1)
EFI relay
Gas leakage from exhaust system

P0137
(DI±146)Oxygen Sensor Circuit Low Volt-
age (Bank 1 Sensor 2)
Open in HO2 sensor (sensor 2) circuit
HO2 sensor (sensor 2)
HO2 sensor heater (sensor 2)
EFI relay
Gas leakage from exhaust system

P0138
(DI±146)Oxygen Sensor Circuit High Volt-
age (Bank 1 Sensor 2)Short in HO2 sensor (sensor 2) circuit
HO2 sensor (sensor 2)
ECM internal circuit malfunction

P0156
(DI±146)Oxygen Sensor Circuit Malfunc-
tion (Bank 2 Sensor 2)
Open or short in HO2 sensor (sensor 2) circuit
HO2 sensor (sensor 2)
HO2 sensor heater (sensor 2)
Air±Fuel Ratio (A/F) sensor (sensor 1)
EFI relay
Gas leakage from exhaust system

P0157
(DI±146)Oxygen Sensor Circuit Low Volt-
age (Bank 2 Sensor 2)
Open in HO2 sensor (sensor 2) circuit
HO2 sensor (sensor 2)
HO2 sensor heater (sensor 2)
EFI relay
Gas leakage from exhaust system

P0158
(DI±146)Oxygen Sensor Circuit High Volt-
age (Bank 2 Sensor 2)Short in HO2 sensor (sensor 2) circuit
HO2 sensor (sensor 2)
ECM internal circuit malfunction

Page 255 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual ± DIAGNOSTICSENGINE
DI±61
255 Author: Date:
2005 SEQUOIA (RM1146U)P0171
(DI±165)
System too Lean (Bank 1)
Air induction system
Injector blockage
Mass air flow meter
Engine coolant temperatu

Page 256 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual DI±62
± DIAGNOSTICSENGINE
256 Author: Date:
2005 SEQUOIA (RM1146U)P0230
(DI±179)
Fuel Pump Primary Circuit
Open or short in fuel pump relay circuit
Fuel pump relay
Circuit opening relay
Fue

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