Toyota Sequoia (2005). Manual — part 136
A23451
B17516
Air
A
B17517
Air
A
–
DIAGNOSTICS
ENGINE
DI–339
533
10
Check air injection pipe between air switching valve No.2 and exhaust manifold.
CHECK:
(a)
Check that the air injection pipe between the air switching
valve(s) No.2 and exhaust manifold is securely con-
nected.
OK:
The air injection pipe is securely connected.
CHECK:
(a)
Check the air injection pipe for blockages and damage.
OK:
The air injection pipe have no blockages and damage.
NG
Repair or replace air injection pipe.
OK
Check for intermittent problems
(See page
11
Check VSV for air injection control.
PREPARATION:
Disconnect the 2 vacuum hoses.
CHECK:
Check that air does not flow from the port A as shown in the il-
lustration.
OK:
Not flow from port A
CHECK:
Apply battery positive across the terminals, check that air flows
from the port A.
OK:
Flow from port A
NG
Replace VSV for air injection control.
OK
B17412
E8
AIV1
AIV2
B17437
V14
VSV Connector
V15
Wire Harness Side:
DI–340
–
DIAGNOSTICS
ENGINE
534
12
Check for open and short circuit in harness and connector between ECM and
VSV for air injection system control
PREPARATION:
(a)
Remove the intake manifold (see page
).
(b)
Disconnect the E8 ECM connector.
(c)
Disconnect the VSV for air injection system control con-
nector.
CHECK:
Measure the resistance between the VSV connector and ECM.
OK:
Standard:
Tester connection
Specified condition
E8–27 (AIV1) – V14–2
Below 1
Ω
E8–26 (AIV1) – V15–2
Below 1
Ω
CHECK:
Measure the resistance between the VSV connector and body
ground.
OK:
Standard:
Tester connection
Specified condition
E8–27 (AIV1) or V14–2 and Body
ground
10 K
Ω
or higher
E8–26 (AIV1) or V15–2 and Body
ground
10 K
Ω
or higher
NG
Repair or replace harness or connector.
OK
B17444
Wire Harness Side:
Air Injection Driver Connector
A41
VV
B17440
A46
Air Switching Valve Connector
Wire Harness Side:
B17440
A46
Air Switching Valve Connector
Wire Harness Side:
–
DIAGNOSTICS
ENGINE
DI–341
535
13
Check for open and short in harness and connector between air injection driver
and air switching valve.
PREPARATION:
(a)
Remove the intake manifold (see page
).
(b)
Disconnect the A41 air injection driver connector.
(c)
Disconnect the A46 air switching valve connector.
CHECK:
Measure the resistance between the wire harness side connec-
tors.
OK:
Standard:
Tester Connection
Specified Condition
VV (A41–6) – A46–1
Below 1
Ω
VV (A41–6) or A46–1 –
Body ground
10 k
Ω
or higher
NG
Repair or replace harness or connector and go
to step 6.
OK
14
Check for open in harness and connector between air switching valve and body
ground.
PREPARATION:
(a)
Remove the intake manifold (see page
).
(b)
Disconnect the A46 air switching valve connector.
CHECK:
Measure the resistance between the wire harness side connec-
tors and body ground.
OK:
Standard:
Tester Connection
Specified Condition
A46–2 – Body ground
Below 1
Ω
NG
Repair or replace harness or connector and go
to step 6.
OK
B17444
Wire Harness Side:
Air Injection Driver Connector
A41
SIV
B17417
E4
AIRV
DI–342
–
DIAGNOSTICS
ENGINE
536
15
Check for open and short in harness and connector between air injection driver
and ECM.
PREPARATION:
(a)
Disconnect the air injection driver connector.
(b)
Disconnect the E4 ECM connector.
CHECK:
Measure the resistance between the wire harness side connec-
tors.
OK:
Standard:
Tester Connection
Specified Condition
SIV (A41–3) – AIRV (E4–4)
Below 1
Ω
SIV (A41–3) or AIRV (E4–4) –
Body ground
10 k
Ω
or higher
NG
Repair or replace harness or connector and go
to step 6.
OK
Replace ECM (See page
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