2001 TOYOTA SEQUOIA Service Repair Manual

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Page 513 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual A23564
Engine Room J/B
EFI Relay
2
1EFI No.2
EFI No.1
3
5 2A2
J5
J/C A
EDW±B1
2F
Battery BF10
FL Block
4
5B
2D1
2H6E4 B±W
IA4
B±W8
MREL
14P±L L±B
E8 E8
2726
AIV2 AIV1 V14
VSV for Air Injection Co

Page 514 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual B17440
V14
V15
Wire Harness Side:
VSV for Air Injection
Control Connector
B17412
E8
AIV1
AIV2
B17440
V14
V15
Wire Harness Side:
VSV for Air Injection
Control Connector
DI±312
± DIAGNOSTICSENGINE
506

Page 515 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual B17515
± DIAGNOSTICSENGINE
DI±313
507 Author: Date:
2005 SEQUOIA (RM1146U)
3 Check resistance of VSV for air injection control.
PREPARATION:
(a) Disconnect the connector from the VSV.
(b) Disco

Page 516 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual DI±314
± DIAGNOSTICSENGINE
508 Author: Date:
2005 SEQUOIA (RM1146U)
DTC P1441 Secondary Air Injection System Switching
Valve No.2 Stuck Open Bank 1
DTC P1444 Secondary Air Injection System Switc

Page 517 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual B17424
Monitor Operation Outline
Running
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF Engine
Air pump
ASV
(Electromagnetic Type)
ASV No.2 (Bank 1)
(Vacuum Type)*
System Air Pressure ASV No.2 (Bank 2)
(Vacuum Typ

Page 518 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual MonitorJudgement
CDTCs where set FA B D E
Pattern 1 Pattern 1
No pressure changedPressure changed
No pressure changed
P2444, P1441 and P1444 Pressure changed
No pulsation detected
No pressure changedP

MonitorJudgement
CDTCs where set FA B D E
Pattern 1 Pattern 1
No pressure changedPressure changed
No pressure changed
P2444, P1441 and P1444 Pressure changed
No pulsation detected
No pressure changedPressure changed Pattern 1Pattern 1
No pulsation detectedP2444 and ºP1441 or P1444º
Pattern 1Pattern 1
Pressure changed No pressure changedPulsation detected
No pulsation detectedP2444, P1441 and P1444
Pattern 1Pattern 1
No pressure changed No pressure changed Pulsation detected
No pulsation detectedP2444, P1441 and P1444
Pattern 1
Pattern 2
Pressure changed Pressure changed
No pulsation detectedP1441 and P1444
Pattern 1Pattern 2
Pressure changed
No pulsation detected
Pattern 1 Pattern 2
No pressure changed Pressure changed
Pulsation detected
No pulsation detected
Pattern 1 Pattern 2
No pressure changed Pulsation detected
No pulsation detected
Pattern 1 Pattern 3
Pressure changedPressure changed
No pulsation detected
P2444
Pattern 1
Pattern 3
No pressure changed Pressure changed
No pulsation detectedP2444 and ºP1442 or P1445º
Pattern 1
Pattern 3 No pressure changed
Pressure changed No pulsation detectedNo pulsation detected
Pattern 1
Pattern 3No pressure changed No pressure changed
No pulsation detected
No pulsation detectedP2444, P1442 and P1444
Pattern 1
Pattern 4Pressure changed
Pressure changed No pulsation detectedNormal
Pattern 1
Pattern 4Pressure changedNo pressure changed Pulsation detected
No pulsation detectedNormal
Pattern 1
Pattern 4Pressure changedNo pressure changed
No pulsation detected
No pulsation detected
Pattern 1
Pattern 4Pressure changed No pressure changed
No pulsation detected
Pattern 1
Pattern 4 No pressure changed No pressure changed
Pulsation detected
No pulsation detected
Pattern 1
Pattern 4
No pressure changedNo pressure changed No pulsation detected
No pulsation detectedP1442 and P1445
Pattern 2 No pressure changed No pressure changed P2445
Pattern 3Pattern 3
No pressure changed No pressure changed No pulsation detected No pulsation detectedP2441, P2444, P1442 and
P1445
Pattern 3 Pattern 4
No pressure changed No pressure changedNo pulsation detected
No pulsation detectedP2441, P1442 and P1445
Pattern 4
No pressure changedNo pressure changed
P2445
Pulsation detectedP2440 and ºP1441 or P1444º
±±
±±± ±
± ± ± ± ± ± ± ± ± ±
±
±P1441 or P1444
±P1441 and P1444
P1441 and P1444
P2444 and ºP1442 or P1445º
P1442 or P1445
P1442 or P1445
P1442 or P1445
DI±316
± DIAGNOSTICSENGINE
510 Author: Date:
2005 SEQUOIA (RM1146U)
Pattern 2:
Air PumpOFF
Air Switching Valve and Air Switching Valve No.2Open
PressureLess than 5 kPa
Pulsation detectionExhaust gas pulsation detected
Pattern 3:
Air PumpON
Air Switching Valve and Air Switching Valve No.2Close
Pressure1 kPa or more
Pulsation detectionSlight pulsation detected
Pattern 4:
Air PumpOFF
Air Switching Valve and Air Switching Valve No.2Close
PressureLess than 5 kPa
Pulsation detectionNot detected
Judgement and decision of failure mode:

Page 519 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual ± DIAGNOSTICSENGINE
DI±317
511 Author: Date:
2005 SEQUOIA (RM1146U)
MONITOR STRATEGY
P1441Air switching valve No. 2 (Bank 1) is stuck open
Related DTCsP1444Air switching valve No. 2 (Bank 2) is

Page 520 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual DI±318
± DIAGNOSTICSENGINE
512 Author: Date:
2005 SEQUOIA (RM1146U) Air switching valve
ON
Engine RPM±3,750 rpm
P2440: Electromagnetic air switching valve and air switching valve No. 2 are stuc

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