Toyota Sequoia (2005). Manual — part 64

–

DIAGNOSTICS

ENGINE

DI–59

253

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 Problem

Mass air flow meter

P0102

(

DI–102

)

Mass or Volume Air Flow Circuit

Low Input

Open or short in mass air flow meter circuit

Mass air flow meter

ECM

P0103

(

DI–102

)

Mass or Volume Air Flow Circuit

High Input

Open 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 Input

Open 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 Input

Open 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-

cuit

Open 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 Input

Open or short in engine coolant temperature sensor circuit

Engine coolant temperature sensor

ECM

P0118

(

DI–119

)

Engine Coolant Temperature Cir-

cuit High Input

Open or short in engine coolant temperature sensor circuit

Engine coolant temperature sensor

ECM

P0120

(

DI–127

)

Throttle/Pedal Position Sensor/

Switch ”A” Circuit

Open or short in throttle control motor and sensor circuit

Throttle control motor and sensor

ECM

P0121

(

DI–137

)

Throttle/Pedal Position Sensor/

Switch ”A” Circuit Range/Perfor-

mance Problem

Throttle control motor and sensor

DI–60

–

DIAGNOSTICS

ENGINE

254

P0122

(

DI–127

)

Throttle/Pedal Position Sensor/

Switch ”A” 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 ”A” 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 Control

Cooling 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

–

DIAGNOSTICS

ENGINE

DI–61

255

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 ”B” Circuit

Throttle control motor and sensor

ECM

P0222

(

DI–127

)

Throttle/Pedal Position Sensor/

Switch ”B” 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 ”B” Circuit High Input

Throttle control motor and sensor

Open in VTA2 circuit

Open in E2 circuit

VC and VTA2 circuit are short–circuited

ECM

DI–62

–

DIAGNOSTICS

ENGINE

256

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