ac pump TOYOTA SEQUOIA 2001 Service Owner's Guide
[x] Cancel search | Manufacturer: TOYOTA, Model Year: 2001, Model line: SEQUOIA, Model: TOYOTA SEQUOIA 2001Pages: 4323, PDF Size: 48.49 MB
Page 227 of 4323
DI3HJ±10
± DIAGNOSTICSENGINE
DI±33
227 Author: Date:
2005 SEQUOIA (RM1146U)
PROBLEM SYMPTOMS TABLE
SymptomSuspect AreaSee page
Engine does not crank (Does not start)
22.Starter
23.Starter relay
24.Park/neutral position switchST±15
ST±17
DI±576
No initial combustion (Does not start)
1. ECM power source circuit
2. Fuel pump control circuit
3. Engine control module (ECM)DI±493
DI±509
IN±35
No complete combustion (Does not start)1. Fuel pump control circuitDI±509
Engine cranks normally but difficult to start
1. Starter signal circuit
2. Fuel pump control circuit
3. CompressionDI±298
DI±509
EM±3
Difficult to start with cold engine1. Starter signal circuit
2. Fuel pump control circuitDI±298
DI±509
Difficult to start with hot engine1. Starter signal circuit
2. Fuel pump control circuitDI±298
DI±509
High engine idle speed (Poor idling)1. A/C switch circuit
2. ECM power source circuit±
DI±493
Low engine idle speed (Poor idling)1. A/C switch circuit
2. Fuel pump control circuit±
DI±509
Rough idling (Poor idling)1. Compression
2. Fuel pump control circuitEM±3
DI±509
Hunting (Poor idling)1. ECM power source circuit
2. Fuel pump control circuitDI±493
DI±509
Hesitation/Poor acceleration (Poor driveability)1. Fuel pump control circuit
2. A/T faultyDI±509
±
Surging (Poor driveability)1. Fuel pump control circuitDI±509
Engine stalls soon after starting1. Fuel pump control circuitDI±509
Engine stalls during A/C operation1. A/C switch circuit
2. Engine control module (ECM)±
IN±35
Unable to refuel/Difficult to refuel1. ORVR system±
Page 230 of 4323
A2364720 msec./DIV 20 V/DIV
Ground
DI±36
± DIAGNOSTICSENGINE
230 Author: Date:
2005 SEQUOIA (RM1146U) OX2B (E7±33) ± E2 (E8±28)
R ± G±WIdlingPulse generation
(See waveform 10)
STP (E4 15) E1 (E6 1)GY BRBrake pedal is depressed7.5 to 14 VSTP (E4±15) ± E1 (E6±1)G±Y ± BRBrake pedal is releasedBelow 1.5 V
ST1 (E4 16) E1 (E6 1)LB BRBrake pedal is depressedBelow 1.5 VST1± (E4±16) ± E1 (E6±1)L±B ± BRBrake pedal is released7.5 to 14 V
STA (E6±11) ± E1 (E6±1)B±R ± BRShift lever position P or N, Ignition switch START6.0 V or more
STSW (E6±12) ± E1 (E6±1)B ± BRShift lever position P or N, ignition switch START6.0 V or more
STAR/NSW (E7 8) E1 (E6 1)BBRIG switch ON, Other shift position in P, N9 to 14 VSTAR/NSW (E7±8) ± E1 (E6±1)B ± BRIG switch ON, Shift position in P, N0 to 3.0 V
W (E5 30) E1 (E6 1)VW BRIdling9 to 14 VW (E5±30) ± E1 (E6±1)V±W ± BRIG switch ONBelow 3.0 V
TACH (E5±1) ± E1 (E6±1)Y±G ± BRIdlingPulse generation
(See waveform 11)
ACIS (E8±33) ± E1 (E6±1)B±L ± BRIG switch ON9 to 14 V
VPMP (E4±5) ± E1 (E6±1)P±L ± BRIgnition switch ON9 V to 14 V
MPMP (E4±6) ± E1 (E6±1)V±G ± BRVacuum pump OFF
Vacuum pump ON0 V to 3 V
9 V to 14 V
PPMP (E4±22) ± E1 (E6±1)R±G ± BRIgnition switch ON3 V to 3.6 V
AIV1 (E8±27) ± E1 (E6±1)L±B ± BRIgnition switch ON9 to 14 V
AIV2 (E8±26) ± E1 (E6±1)P±L ± BRIgnition switch ON9 to 14 V
AIRV (E4±4) ± E1 (E6±1)R±W ± BRIgnition switch ON9 to 14 V
AIRP (E4±25) ± E1 (E6±1)G±W ± BRIgnition switch ON9 to 14 V
AIP (E8±32) ± E1 (E6±1)B±Y ± BRIgnition switch ON3 V to 3.6 V
*1: The ECM terminal voltage is constant regardless of the output voltage from the sensor.
WAVEFORM 1
Fuel injector
ECM Terminal NamesBetween #10 (to 40) and E01
Tester Ranges20 V/DIV, 20 msec./DIV
ConditionsIdling
HINT:
The wavelength becomes shorter as the engine rpm increases.
Page 247 of 4323
± 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
Page 250 of 4323
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 running or idling
when OCV off
VVT CTRL B2Turn on and off OCV
(Oil Control Valve)ON/OFF
Engine stalls or idles roughly
when OCV turned ON
Normal engine running or idling
when OCV off
A/C CUT SIGControl A/C cut signalON/OFF±
FUEL PUMP/SPDActivate fuel pump (C/OPN Relay)ON/OFF±
TC/TE1Turn on and off TC and TE1 con-
nectionON/OFFON: TC and TE1 connected
OFF: TC and TE1 disconnected
FC IDL PROHBTProhibit idling fuel cut controlON/OFF±
ETCS OPEN SLOWThrottle actuatorON: throttle valve opens slowly
This test is possible when the fol-
lowing conditions are met:
Ignition switch ON
Engine does not start
Fully depressing accelerator ped-
al (APP: 58 degrees or more)
ETCS CLOSE SLOWThrottle actuatorON: throttle valve closes slowlySame as above
ETCS OPEN FASTThrottle actuatorON: throttle valve opens fastSame as above
ETCS CLOSE FASTThrottle actuatorON: throttle valve closes fastSame as above
FUEL CUT #1Cylinder #1 injector fuel cutON/OFFThis test is possible during vehicle
stopping and engine idling.
FUEL CUT #2Cylinder #2 injector fuel cutON/OFFSame as above
FUEL CUT #3Cylinder #3 injector fuel cutON/OFFSame as above
FUEL CUT #4Cylinder #4 injector fuel cutON/OFFSame as above
FUEL CUT #5Cylinder #5 injector fuel cutON/OFFSame as above
FUEL CUT #6Cylinder #6 injector fuel cutON/OFFSame as above
FUEL CUT #7Cylinder #7 injector fuel cutON/OFFSame as above
FUEL CUT #8Cylinder #8 injector fuel cutON/OFFSame as above
VENT VALVE (ALONE)Activate vent valve
(built into pump module)ON/OFF±
VCUUM PUMPActivate vacuum pump
(built into pump module)ON/OFF±
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 259 of 4323
± DIAGNOSTICSENGINE
DI±65
259 Author: Date:
2005 SEQUOIA (RM1146U)P0351
(DI±221)
Ignition Coil ºAº Primary/Second-
ary Circuit
Open or short in IGF 1 and IGT 1 circuit from No. 1 ignition coil
with igniter to ECM
No. 1 ignition coil with igniter
Ignition system
ECM
P0352
(DI±221)Ignition Coil ºBº Primary/Second-
ary Circuit
Open or short in IGF 2 and IGT 2 circuit from No. 2 ignition coil
with igniter to ECM
No. 2 ignition coil with igniter
Ignition system
ECM
P0353
(DI±221)Ignition Coil ºCº Primary/Second-
ary Circuit
Open or short in IGF 2 and IGT 3 circuit from No. 3 ignition
coil with igniter to ECM
No. 3 ignition coil with igniter
Ignition system
ECM
P0354
(DI±221)Ignition Coil ºDº Primary/Second-
ary Circuit
Open or short in IGF 1 and IGT 4 circuit from No. 4 ignition coil
with igniter to ECM
No. 4 ignition coil with igniter
Ignition system
ECM
P0355
(DI±221)Ignition Coil ºEº Primary/Second-
ary Circuit
Open or short in IGF 2 and IGT 5 circuit from No. 5 ignition coil
with igniter to ECM
No. 5 ignition coil with igniter
Ignition system
ECM
P0356
(DI±221)Ignition Coil ºFº Primary/Second-
ary Circuit
Open or short in IGF 1 and IGT 6 circuit from No. 6 ignition coil
with igniter to ECM
No. 6 ignition coil with igniter
Ignition system
ECM
P0357
(DI±221)Ignition Coil ºGº Primary/Second-
ary Circuit
Open or short in IGF 1 and IGT 7 circuit from No. 7 ignition coil
with igniter to ECM
No. 7 ignition coil with igniter
Ignition system
ECM
P0358
(DI±221)Ignition Coil ºHº Primary/Second-
ary Circuit
Open or short in IGF 2 and IGT 8 circuit from No. 8 ignition coil
with igniter to ECM
No. 8 ignition coil with igniter
Ignition system
ECM
P0412
(DI±234)Air Injection System Air Switch-
ing Valve Malfunction
Open in air switching valve drive circuit
Short between air switching valve circuit and +B circuit
Air injection driver
ECM
P0418
(DI±242)Air Injection System Air Pump
Malfunction
Open in air pump drive circuit
Short between air pump circuit and +B circuit
Air injection driver
ECM
P0420
(DI±249)Catalyst System Efficiency Be-
low Threshold (Bank 1)Gas leakage on exhaust system
Heated oxygen sensor (bank 1 sensor 1, 2)
Three±way catalytic converter
P0430
(DI±249)Catalyst System Efficiency Be-
low Threshold (Bank 2)Gas leakage on exhaust system
Heated oxygen sensor (bank 2 sensor 1, 2)
Three±way catalytic converter
Page 260 of 4323
DI±66
± DIAGNOSTICSENGINE
260 Author: Date:
2005 SEQUOIA (RM1146U)P043E
(DI±445)
Evaporate Emission System
Reference Orifice Clog UpPump module
P043F
(DI±445)Evaporate Emission System
Reference Orifice High FlowPump 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 InputPump module (including pressure sensor)
Connector/Wire harness (between pump module and ECM)
ECM
P0453
(DI±264)Evaporative Emission Control
System Pressure Sensor/Switch
High InputPump 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) ErrorECM
P0606
(DI±296)ECM/PCM ProcessorECM
P0607
(DI±296)Control Module PerformanceECM
Page 262 of 4323
DI±68
± DIAGNOSTICSENGINE
262 Author: Date:
2005 SEQUOIA (RM1146U)P0986
(DI±651)
Shift Solenoid ºEº Control Circuit
High (Shift Solenoid Valve SR)Electronic control automatic transmission (ECT)
P1340
(DI±304)Camshaft Position Sensor ºAº
Circuit (Bank 1 Sensor 2)
Open or short in camshaft position sensor circuit
Camshaft position sensor
LH camshaft timing pulley
ECM
P1341
(DI±304)Camshaft Position Sensor ºAº
Circuit Range/Performance
(Bank 1 Sensor 2)Open or short in camshaft position sensor circuit
Camshaft position sensor
LH camshaft timing pulley
ECM
P1440
(DI±309)Scondary Air Injection System
Control Valve Circuit Bank 1Open or short in VSV for air injection control circuit
ECM
P1441
(DI±314)Scondary Air Injection System
Switching Valve No.2 Bank 1
Stuck OpenVSV for air injection control circuit (Bank 1)
Air switching valve No.2 (Bank 1)
VSV for air injection system (Bank 1)
ECM
P1442
(DI±330)Scondary Air Injection System
Switching Valve No.2 Bank 1
Stuck Close
VSV for air injection control circuit (Bank 1)
Vacuum hose (VSV for air injection control ± air switching
valve No.2)
Air injector pipe (Air switching valve No.2 ± exhaust manifold)
Air switching valve No.2 (Bank 1)
VSV for air injection control (Bank 1)
ECM
P1443
(DI±309)Scondary Air Injection System
Control Valve Circuit Bank 2Open or short in VSV for air injection control circuit
ECM
P1444
(DI±314)Scondary Air Injection System
Switching Valve No.2 Bank 2
Stuck OpenVSV for air injection control circuit (Bank 2)
Air switching valve No.2 (Bank 2)
VSV for air injection system (Bank 2)
ECM
P1445
(DI±330)Scondary Air Injection System
Switching Valve No.2 Bank 2
Stuck Cloes
VSV for air injection control circuit (Bank 2)
Vacuum hose (VSV for air injection control ± air switching
valve No.2)
Air injector pipe (Air switching valve No.2 ± exhaust manifold)
Air switching valve No.2 (Bank 2)
VSV for air injection control (Bank 2)
ECM
P1613
(DI±343)Air Injection System Air Injection
Driver
Short between air pump circuit and body ground
Open in air pump drive circuit
Short between air pump circuit and +B circuit
Air injection driver
ECM
P2102
(DI±354)Throttle Actuator Control Motor
Circuit LowOpen in throttle control motor and sensor circuit
Throttle control motor and sensor
ECM
P2103
(DI±354)Throttle Actuator Control Motor
Circuit High
Short in throttle control motor and sensor circuit
Throttle control motor and sensor
Throttle valve
Throttle body
ECM
P2111
(DI±358)Throttle Actuator Control System
± Stuck Open
Throttle control motor and sensor circuit
Throttle control motor and sensor
Throttle valve
Throttle body
Page 264 of 4323
DI±70
± DIAGNOSTICSENGINE
264 Author: Date:
2005 SEQUOIA (RM1146U)P2197
(DI±383)
Oxygen (A/F) Sensor Signal
Stuck Lean (Bank 2 Sensor 1)
Open or short in A/F sensor (sensor 1) circuit
A/F sensor (sensor 1)
A/F sensor heater (sensor 1)
A/F relay
A/F sensor heater and EFI relay circuits
Air induction system
Fuel pressure
Injector
ECM
P2198
(DI±383)Oxygen (A/F) Sensor Signal
Stuck Rich (Bank 2 Sensor 1)
Open or short in A/F sensor (sensor 1) circuit
A/F sensor (sensor 1)
A/F sensor heater (sensor 1)
A/F relay
A/F sensor heater and EFI relay circuits
Air induction system
Fuel pressure
Injector
ECM
P2238
(DI±402)Oxygen Sensor Pumping Cur-
rent Circuit Low (For A/F Sensor)
(Bank 1 Sensor 1)
Open or short in A/F sensor (sensor 1) circuit
A/F sensor (sensor 1)
A/F sensor heater (sensor 1)
A/F relay
A/F sensor heater and EFI relay circuits
P2239
(DI±402)Oxygen Sensor Pumping Cur-
rent Circuit High (For A/F Sen-
sor) (Bank 1 Sensor 1)
Open or short in A/F sensor (sensor 1) circuit
A/F sensor (sensor 1)
A/F sensor heater (sensor 1)
A/F relay
A/F sensor heater and EFI relay circuits
P2241
(DI±402)Oxygen Sensor Pumping Cur-
rent Circuit Low (For A/F Sensor)
(Bank 2 Sensor 1)
Open or short in A/F sensor (sensor 1) circuit
A/F sensor (sensor 1)
A/F sensor heater (sensor 1)
A/F relay
A/F sensor heater and EFI relay circuits
P2242
(DI±402)Oxygen Sensor Pumping Cur-
rent Circuit High (For A/F Sen-
sor) (Bank 2 Sensor 1)
Open or short in A/F sensor (sensor 1) circuit
A/F sensor (sensor 1)
A/F sensor heater (sensor 1)
A/F relay
A/F sensor heater and EFI relay circuits
P2252
(DI±402)Oxygen Sensor Reference
Ground Current Circuit Low (For
A/F Sensor) (Bank 1 Sensor 1)
Open or short in A/F sensor (sensor 1) circuit
A/F sensor (sensor 1)
A/F sensor heater (sensor 1)
A/F relay
A/F sensor heater and EFI relay circuits
P2253
(DI±402)Oxygen Sensor Reference Cur-
rent Circuit High (For A/F Sen-
sor) (Bank 1 Sensor 1)
Open or short in A/F sensor (sensor 1) circuit
A/F sensor (sensor 1)
A/F sensor heater (sensor 1)
A/F relay
A/F sensor heater and EFI relay circuits
P2255
(DI±402)Oxygen Sensor Reference
Ground Current Circuit Low (For
A/F Sensor) (Bank 2 Sensor 1)
Open or short in A/F sensor (sensor 1) circuit
A/F sensor (sensor 1)
A/F sensor heater (sensor 1)
A/F relay
A/F sensor heater and EFI relay circuits
P2256
(DI±402)Oxygen Sensor Reference Cur-
rent Circuit High (For A/F Sen-
sor) (Bank 2 Sensor 1)
Open or short in A/F sensor (sensor 1) circuit
A/F sensor (sensor 1)
A/F sensor heater (sensor 1)
A/F relay
A/F sensor heater and EFI relay circuits
Page 265 of 4323
± DIAGNOSTICSENGINE
DI±71
265 Author: Date:
2005 SEQUOIA (RM1146U)P2401
(DI±410)
Evaporative Emission System
Leak Detection Pump Control
Circuit LowPump module
Connector/Wire harness (between pump module and ECM)
ECM
P2402
(DI±410)Evaporative Emission System
Leak Detection Pump Control
Circuit HighPump module
Connector/Wire harness (between pump module and ECM)
ECM
P2419
(DI±416)Evaporate Emission System
Switching Valve Control Circuit
LowPump module
Connector/Wire harness (between pump module and ECM)
ECM
P2420
(DI±416)Evaporate Emission System
Switching Valve Control Circuit
HighPump module
Connector/Wire harness (between pump module and ECM)
ECM
P2430
(DI±422)Secondary Air Injection System
Air Flow/Pressure Sensor Circuit
Bank 1
Pressure sensor
Open or short in pressure sensor circuit
Vacuum hose
Check valve
ECM
P2431
(DI±422)Secondary Air Injection System
Air Flow/Pressure Sensor Circuit
Range/Performance Bank 1
Pressure sensor
Open or short in pressure sensor circuit
Vacuum hose
Check valve
ECM
P2432
(DI±422)Secondary Air Injection System
Air Flow/Pressure Sensor Circuit
Low Bank 1
Pressure sensor
Open or short in pressure sensor circuit
Vacuum hose
Check valve
ECM
P2433
(DI±422)Secondary Air Injection System
Air Flow/Pressure Sensor Circuit
High Bank 1
Pressure sensor
Open or short in pressure sensor circuit
Vacuum hose
Check valve
ECM
P2440
(DI±314)Secondary Air Injection System
Switching Valve Stuck Open
Bank 1
Electromagnetic air switching valve
Air switching valve No.2 (Bank 1 and/or 2)
VSV for air injection system (Bank 1 and/or 2)
Air injection driver
Air injection driver circuit
ECM
P2441
(DI±330)Secondary Air Injection System
Switching Valve Stuck Close
Bank 1
Vacuum hoses (Throttle body ± VSVs for air injection control)
Electromagnetic air switching valve
Air injector pipe (Air switching valve No.2 ± exhaust manifold)
Air injection hose
Air switching valve No.2 (Bank 1 and/or 2)
VSV for air injection control (Bank 1 and/or 2)
Air injection driver
Air injection driver circuit
ECM
P2444
(DI±426)Secondary Air Injection System
Pump Stuck On Bank 1
Short in air pump circuit
Pressure sensor
Air pump assembly
Open or short in pressure sensor circuit
ECM