2001 TOYOTA SEQUOIA coolant
[x] Cancel search: coolantPage 246 of 4323
DI±52
± DIAGNOSTICSENGINE
246 Author: Date:
2005 SEQUOIA (RM1146U)FUEL SYS #2
Fuel system status (Bank1):
OL or CL or OL DRIVE or
OL FAULT or CL FAULT
CL: Idling after warming up
OL (Open Loop): Has not yet sa-
tisfied conditions to go closed
loop
CL (Closed Loop): Using heated
oxygen sensor as feedback for
fuel control.
OL DRIVE: Open loop due to
driving conditions (fuel enrich-
ment)
OL FAULT: Open loop due to de-
tected system fault
CL FAULT: Closed loop but
heated oxygen sensor, which
used for fuel control malfunction-
ing
O2FT B1 S2
Short±term fuel trim associated
with the bank 1 sensor 2:
Min.: ±100 %, Max.: 99.2 %
0 ± 20 %Same as SHORT FT #1
O2FT B2 S2
Short±term fuel trim associated
with the bank 1 sensor 2:
Min.: ±100 %, Max.: 99.2 %
0 ± 20 %Same as SHORT FT #1
AF FT B1 S1
Short±term fuel trim associated
with the bank 1 sensor 1:
Min.: 0, Max.: 1.999
Value less than 1 (0.000 to
0.999) = Lean
Stoichiometric air±fuel ratio=1
Value greater than 1 (1.001 to
1.999) = RICH
'
AF FT B2 S1
Short±term fuel trim associated
with the bank 1 sensor 1:
Min.: 0, Max.: 1.999
Value less than 1 (0.000 to
0.999) = Lean
Stoichiometric air±fuel ratio=1
Value greater than 1 (1.001 to
1.999) = RICH
'
CAT TEMP B1S1
Catalyst temperature (Bank 1,
Sensor 1):
Min.: ±40, Max.: 6,513.5 C
''
CAT TEMP B2S1
Catalyst temperature (Bank 1,
Sensor 1):
Min.: ±40, Max.: 6,513.5 C
''
CAT TEMP B1S2
Catalyst temperature (Bank 1,
Sensor 2):
Min.: ±40, Max.: 6,513.5 C
''
CAT TEMP B2S2
Catalyst temperature (Bank 1,
Sensor 2):
Min.: ±40, Max.: 6,513.5 C
''
INI COOL TEMPInitial engine coolant temperature:
Min.: ±40C, Max.: 140CClose to ambient air temperatureService data
INI INTAKE TEMPInitial intake air temperature:
Min.: ±40C, Max.: 140CClose to ambient air temperatureService data
INJ VOLInjection volume (cylinder 1):
Min.: 0 ml, Max.: 2.048 ml0 to 0.5 mlQuantity of fuel injection volume
for 10 times
STARTER SIGStarter signal: ON or OFFON: Cranking'
PS SWPower steering signal:
ON or OFFON: Power steering operation'
PS SIGNALPower steering signal:
ON or OFFON: When steering wheel first
turned after ignition switch turned
to ONThis signal status usually ON until
ignition switch turned to OFF
CTP SWClosed throttle position switch:
ON or OFFON: Throttle fully closed
OFF: Throttle open'
Page 253 of 4323
± 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
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
± 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 temperature sensor
Fuel pressure
Gas leakage on exhaust system
Open or short in heated oxygen sensor (bank 1 sensor 1)
circuit
Heated oxygen sensor (bank 1 sensor 1)
Heated oxygen sensor heater
EFI relay
PCV piping
ECM
P0172
(DI±165)System too Rich (Bank 1)
Injector leak, blockage
Mass air flow meter
Engine coolant temperature sensor
Ignition system
Fuel pressure
Gas leakage in exhaust system
Open or short in heated oxygen sensor (bank 1 sensor 1)
circuit
Heated oxygen sensor (bank 1 sensor 1)
ECM
P0174
(DI±165)System too Lean (Bank 2)
Air induction system
Injector blockage
Mass air flow meter
Engine coolant temperature sensor
Fuel pressure
Gas leakage on exhaust system
Open or short in heated oxygen sensor (bank 2 sensor 1)
circuit
Heated oxygen sensor (bank 2 sensor 1)
Heated oxygen sensor heater
EFI relay
PCV piping
ECM
P0175
(DI±165)System too Rich (Bank 2)
Injector leak, blockage
Mass air flow meter
Engine coolant temperature sensor
Ignition system
Fuel pressure
Gas leakage in exhaust system
Open or short in heated oxygen sensor (bank 2 sensor 1)
circuit
Heated oxygen sensor (bank 2 sensor 1)
ECM
P0220
(DI±127)Throttle/Pedal Position Sensor/
Switch ºBº CircuitThrottle control motor and sensor
ECM
P0222
(DI±127)Throttle/Pedal Position Sensor/
Switch ºBº Circuit Low Input
Throttle control motor and sensor
Short in VTA2 circuit
Open in VC circuit
ECM
P0223
(DI±127)Throttle/Pedal Position Sensor/
Switch ºBº Circuit High Input
Throttle control motor and sensor
Open in VTA2 circuit
Open in E2 circuit
VC and VTA2 circuit are short±circuited
ECM
Page 256 of 4323
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
Fuel pump
ECM
±
P0300
(DI±184)Random/Multiple Cylinder Misfire
Detected
Open or short in engine wire
Connector connection
Vacuum hose connection
Ignition system
Injector
Fuel pressure
Mass air flow meter
Engine coolant temperature sensor
Compression pressure
Valve clearance
Valve timing
PCV piping
ECM
*2
P0301
(DI±184)Cylinder 1 Misfire Detected
Open or short in engine wire
Connector connection
Vacuum hose connection
Ignition system
Injector
Fuel pressure
Mass air flow meter
Engine coolant temperature sensor
Compression pressure
Valve clearance
Valve timing
PCV piping
ECM
*2
P0302
(DI±184)Cylinder 2 Misfire Detected
Open or short in engine wire
Connector connection
Vacuum hose connection
Ignition system
Injector
Fuel pressure
Mass air flow meter
Engine coolant temperature sensor
Compression pressure
Valve clearance
Valve timing
PCV piping
ECM
*2
P0303
(DI±184)Cylinder 3 Misfire Detected
Open or short in engine wire
Connector connection
Vacuum hose connection
Ignition system
Injector
Fuel pressure
Mass air flow meter
Engine coolant temperature sensor
Compression pressure
Valve clearance
Valve timing
PCV piping
ECM
*2
Page 257 of 4323
± DIAGNOSTICSENGINE
DI±63
257 Author: Date:
2005 SEQUOIA (RM1146U)P0304
(DI±184)
Cylinder 4 Misfire Detected
Open or short in engine wire
Connector connection
Vacuum hose connection
Ignition system
Injector
Fuel pressure
Mass air flow meter
Engine coolant temperature sensor
Compression pressure
Valve clearance
Valve timing
PCV piping
ECM
*2
P0305
(DI±184)Cylinder 5 Misfire Detected
Open or short in engine wire
Connector connection
Vacuum hose connection
Ignition system
Injector
Fuel pressure
Mass air flow meter
Engine coolant temperature sensor
Compression pressure
Valve clearance
Valve timing
PCV piping
ECM
*2
P0306
(DI±184)Cylinder 6 Misfire Detected
Open or short in engine wire
Connector connection
Vacuum hose connection
Ignition system
Injector
Fuel pressure
Mass air flow meter
Engine coolant temperature sensor
Compression pressure
Valve clearance
Valve timing
PCV piping
ECM
*2
P0307
(DI±184)Cylinder 7 Misfire Detected
Open or short in engine wire
Connector connection
Vacuum hose connection
Ignition system
Injector
Fuel pressure
Mass air flow meter
Engine coolant temperature sensor
Compression pressure
Valve clearance
Valve timing
PCV piping
ECM
*2
Page 258 of 4323
DI±64
± DIAGNOSTICSENGINE
258 Author: Date:
2005 SEQUOIA (RM1146U)P0308
(DI±184)
Cylinder 8 Misfire Detected
Open or short in engine wire
Connector connection
Vacuum hose connection
Ignition system
Injector
Fuel pressure
Mass air flow meter
Engine coolant temperature sensor
Compression pressure
Valve clearance
Valve timing
PCV piping
ECM
*2
P0325
(DI±204)Knock Sensor 1 Circuit (Bank 1
or Single Sensor)Open or short in knock sensor 1 circuit
Knock sensor 1 (looseness)
ECM
P0327
(DI±204)Knock Sensor 1 Circuit Low In-
put (Bank 1 or Single Sensor)Short in knock sensor circuit
Knock sensor
ECM
P0328
(DI±204)Knock Sensor 1 Circuit High In-
put (Bank 1 or Single Sensor)Open in knock sensor circuit
Knock sensor
ECM
P0330
(DI±204)Knock Sensor 2 Circuit (Bank 2)
Open or short in knock sensor 2 circuit
Knock sensor 2 (looseness)
ECM
P0332
(DI±204)Knock Sensor 2 Circuit High In-
put (Bank 2)Open in knock sensor circuit
Knock sensor
ECM
P0333
(DI±204)Knock Sensor 2 Circuit High In-
put (Bank 2)Open in knock sensor circuit
Knock sensor
ECM
P0335
(DI±210)Crankshaft Position Sensor ºAº
Circuit
Open or short in crankshaft position sensor circuit
Crankshaft position sensor
Signal plate
ECM
P0339
(DI±210)Crankshaft Position Sensor ºAº
Circuit Intermittent
Open or short in crankshaft position sensor circuit
Crankshaft position sensor
Signal plate
ECM
±
P0340
(DI±216)Camshaft Position Sensor ºAº
Circuit (Bank 1 or Single Sensor)
Open or short in camshaft position sensor circuit
Camshaft position sensor
LH camshaft timing pulley
Jumping teeth of timing belt
ECM
P0341
(DI±216)Camshaft Position Sensor ºAº
Circuit Range/Performance
(Bank 1 or Single Sensor)
Open or short in camshaft position sensor circuit
Camshaft position sensor
LH camshaft timing pulley
Jumping teeth of timing belt
ECM
P0345
(DI±221)Camshaft Position Sensor ºAº
Circuit (Bank 2)Open or short in camshaft position sensor circuit
VVT sensor
ECM
P0346
(DI±221)Camshaft Position Sensor ºAº
Circuit Range/Performance
(Bank 2)Open or short in camshaft position sensor circuit
VVT sensor
ECM
Page 267 of 4323
DID82±01
A20891
Mass Air Flow Sensor Crankshaft Position Sensor
Actual Valve TimingCorrection Target Valve Timing
Feedback
Duty Control ECM
Camshaft Timing
Oil Control
Valve (OCV)
Vehicle Speed Signal Engine Coolant Temp. Sensor Throttle Position Sensor
Camshaft Position Sensor
± DIAGNOSTICSENGINE
DI±73
267 Author: Date:
2005 SEQUOIA (RM1146U)
CIRCUIT INSPECTION
DTC P0010 Camshaft Position ºAº Actuator circuit
(Bank 1)
DTC P0020 Camshaft Position ºAº Actuator circuit
(Bank 2)
CIRCUIT DESCRIPTION
The Variable Valve Timing (VVT) system includes the ECM, the Oil Control Valve (OCV) and the VVT control-
ler. The ECM sends a target ºduty±cycleº control signal to the OCV. This control signal, applied to the OCV,
regulates the oil pressure supplied to the VVT controller. Camshaft timing control is performed based on en-
gine operation conditions such as intake air volume, throttle position and engine coolant temperature.
The ECM controls the OCV, based on the signals output from the sensors. The VVT controller regulates the
intake camshaft angle using oil pressure through the OCV. As a result, the relative position between the cam-
shaft and the crankshaft is optimized, and the engine torque improves, fuel economy improves, and exhaust
emissions decrease under overall driving conditions. Also, the ECM detects the actual valve timing using
signals from the camshaft position sensor and the crankshaft position sensor, and performs feedback con-
trol. This is how target valve timing is verified by the ECM.
DTC No.DTC Detecting ConditionTrouble Area
P0010
P0020Open or short in OCV circuit
Open or short in OCV circuit
OCV
ECM