Toyota Tundra. Manual — part 1152



EVAP system
hose (pipe from
air inlet port to
canister pump
module, canister
filter, fuel tank
vent hose)



ECM

P2419

Evaporative Emission
System Switching
Valve Control Circuit
Low



Canister pump
module
(Reference
orifice, leak
detection pump,
vent valve)



Connector/wire
harness (Canister
pump module -
ECM)



EVAP system
hose (pipe from
air inlet port to
canister pump
module, canister
filter, fuel tank
vent hose)



ECM

Comes on

DTC Stored

P2420

Evaporative Emission
System Switching
Valve Control Circuit
High



Canister pump
module
(Reference
orifice, leak
detection pump,
vent valve



Connector/wire
harness (Canister
pump module -
ECM)



ECM

Comes on

DTC Stored

P2431

Secondary Air
Injection System Air
Flow/Pressure Sensor
Circuit
Range/Performance
Bank 1



Pressure sensor



Open or short in
pressure sensor
circuit



ECM

Comes on

DTC Stored

P2432

Secondary Air
Injection System Air



Pressure sensor Comes on

DTC Stored

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra

Flow/Pressure Sensor
Circuit Low Bank 1



Open or short in
pressure sensor
circuit



ECM

P2433

Secondary Air
Injection System Air
Flow/Pressure Sensor
Circuit High Bank 1



Pressure sensor



Open or short in
pressure sensor
circuit



ECM

Comes on

DTC Stored

P2436

Secondary Air
Injection System Air
Flow/Pressure Sensor
Circuit
Range/Performance
Bank 2



Pressure sensor



Open or short in
pressure sensor
circuit



ECM

Comes on

DTC Stored

P2437

Secondary Air
Injection System Air
Flow/Pressure Sensor
Circuit Low Bank 2



Pressure sensor



Open or short in
pressure sensor
circuit



ECM

Comes on

DTC Stored

P2438

Secondary Air
Injection System Air
Flow/Pressure Sensor
Circuit High Bank 2



Pressure sensor



Open or short in
pressure sensor
circuit



ECM

Comes on

DTC Stored

P2440

Secondary Air
Injection System
Switching Valve Stuck
Open Bank 1



Air switching
valve (ASV)



Open or short in
ASV circuit



Pressure sensor



Pressure sensor
circuit



Air Injection
Control Driver
(AID)



ECM

Comes on

DTC Stored

P2441

Secondary Air
Injection System
Switching Valve Stuck
Close Bank 1



Air switching
valve (ASV)



Open or short in
ASV circuit



Vacuum hose

Comes on

DTC Stored

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra

(ASV - pressure
sensor)



Air injection
hose



Pressure sensor



Pressure sensor
circuit



Air Injection
Control Driver
(AID)



ECM

P2442

Secondary Air
Injection System
Switching Valve Stuck
Open Bank 2



Air switching
valve (ASV)



Open or short in
ASV circuit



Pressure sensor



Pressure sensor
circuit



Air Injection
Control Driver
(AID)



ECM

Comes on

DTC Stored

P2443

Secondary Air
Injection System
Switching Valve Stuck
Closed Bank 2



Air switching
valve (ASV)



Open or short in
ASV circuit



Vacuum hose
(ASV - pressure
sensor)



Air injection
hose



Pressure sensor



Pressure sensor
circuit



Air Injection
Control Driver
(AID)



ECM

Comes on

DTC Stored

P2444

Secondary Air
Injection System Pump
Stuck On Bank 1



Short in air pump
circuit



Open or short in

Comes on

DTC Stored

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra

pressure sensor
circuit



Pressure sensor



Air Injection
Control Driver
(AID)



ECM

P2445

Secondary Air
Injection System Pump
Stuck Off Bank 1



Air pump



Open in air pump
circuit



Air injection
system piping



Vacuum hose
(pressure sensor -
air switching
valve)



Pressure sensor



Open or short in
pressure sensor
circuit



Air Injection
Control Driver
(AID)



ECM

Comes on

DTC Stored

P2446

Secondary Air
Injection System Pump
Stuck On Bank 2



Short in air pump
circuit



Open or short in
pressure sensor
circuit



Pressure sensor



Air Injection
Control Driver
(AID)



ECM

Comes on

DTC Stored

P2447

Secondary Air
Injection System Pump
Stuck Off Bank 2



Air pump



Open in air pump
circuit



Air injection
system piping



Vacuum hose
(pressure sensor -
air switching

Comes on

DTC Stored

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra