Toyota Sequoia (2005). Manual — part 160
B17411
E4
AIRV
AIRP
–
DIAGNOSTICS
ENGINE
DI–435
629
8
Check voltage between AIRP and AIRV terminal of ECM and body ground.
PREPARATION:
(a)
Connect the hand–held tester to the DLC3.
(b)
Turn the ignition switch ON and turn the tester ON.
CHECK:
(a)
When the air pump and air switching valve are operated
using the hand–held tester, measure the voltage between
terminals E4–25 (AIRP) and E4–4 (AIRV) of the air injec-
tion driver connector and body ground.
(b)
Select the following menu items: DIAGNOSIS/EN-
HANCED OBD II/SYSTEM CHECK/AIR INJ CHECK/
MANUAL OPERATION/OPERATION 1 and 2
HINT:
OPERATION 1: AP:OFF, EASV:CLOSE, ASV1:CLOSE,
ASV2:CLOSE
OPERATION 2: AP: ON, EASV:OPEN, ASV1:OPEN,
ASV2:OPEN
NOTICE:
This test only allows technicians to operate the AI system
for 5 seconds. Furthermore, the test can be performed 4
times a trip. If the test is repeated, intervals of at least 30
seconds are required between tests.
While the AI system operation using the hand–held tester
is prohibited, the tester displays the prohibition (WAIT or
ERROR). If the ERROR (AI STATUS NG) is displayed on the
tester, stop the engine for 10 minutes and then try again..
OK:
Standard:
Air pump operation
Tester Connection
Specified Condition
ON
E4–25 (AIRP) –
Body ground
10 V or more
OFF
E4–25 (AIRP) –
Body ground
3.5 to 7.7 V*
ASV operation (EASV)
Tester Connection
Specified Condition
OPEN
E4–4 (AIRV) –
Body ground
10 V or more
CLOSE
E4–4 (AIRV) –
Body ground
3.5 to 7.7 V*
*: 35 to 55 % of the +B voltage.
NG
Replace ECM (See page
OK
B17444
Wire Harness Side:
Air Injection Driver Connector
A41
SIP
SIV
DI–436
–
DIAGNOSTICS
ENGINE
630
9
Check voltage between SIV and SIP terminals of air injection driver and body
ground.
PREPARATION:
(a)
Disconnect the A41 air injection driver connector.
(b)
Connect the hand–held tester to the DLC3.
(c)
Turn the ignition switch ON and turn the tester ON.
CHECK:
(a)
When the air pump and air switching valve are operated
using the hand–held tester, measure the voltage between
terminals A41–3 (SIV) and A41–4 (SIP) of the air injection
driver connector and body ground.
(b)
Select the following menu items: DIAGNOSIS/EN-
HANCED OBD II/SYSTEM CHECK/AIR INJ CHECK/
MANUAL OPERATION/OPERATION 1 and 2
HINT:
OPERATION 1: AP:OFF, EASV:CLOSE, ASV1:CLOSE,
ASV2:CLOSE
OPERATION 2: AP:ON, EASV:OPEN, ASV1:OPEN,
ASV2:OPEN
NOTICE:
This test only allows technicians to operate the AI system
for 5 seconds. Furthermore, the test can be performed 4
times a trip. If the test is repeated, intervals of at least 30
seconds are required between tests.
While the AI system operation using the hand–held tester
is prohibited, the tester displays the prohibition (WAIT or
ERROR). If the ERROR (AI STATUS NG) is displayed on the
tester, stop the engine for 10 minutes and then try again..
OK:
Standard:
Air pump operation
Tester Connection
Specified Condition
ON
A41–3 (SIP) – Body
ground
10 V or more
OFF
A41–3 (SIP) – Body
ground
3.5 to 7.7 V*
ASV operation (EASV)
Tester Connection
Specified Condition
OPEN
A41–4 (SIV) – Body
ground
10 V or more
CLOSE
A41–4 (SIV) – Body
ground
3.5 to 7.7 V*
*: 35 to 55 % of the +B voltage.
NG
Repair or replace harness or connector be-
tween air injection driver and ECM.
OK
B17438
Wire Harness Side:
Air Pump Connector
A43
–
DIAGNOSTICS
ENGINE
DI–437
631
10
Check voltage between terminal 2 of air pump and body ground.
PREPARATION:
(a)
Remove the intake manifold (see page
).
(b)
Disconnect the A43 air pump connector.
(c)
Connect the hand–held tester to the DLC3.
(d)
Turn the ignition switch ON and turn the tester ON.
CHECK:
(a)
When the air pump is operated using the hand–held tes-
ter, measure the voltage between terminal A43–2 of the
air injection driver connector and body ground.
(b)
Select the following menu items: DIAGNOSIS/EN-
HANCED OBD II/SYSTEM CHECK/ AIR INJ CHECK/
MANUAL OPERATION/OPERATION 1 and 2
HINT:
OPERATION 1: AP:OFF, EASV:CLOSE, ASV1:CLOSE,
ASV2:CLOSE
OPERATION 2: AP:ON, EASV:OPEN, ASV1:OPEN,
ASV2:OPEN
NOTICE:
This test only allows technicians to operate the AI system
for 5 seconds. Furthermore, the test can be performed 4
times a trip. If the test is repeated, intervals of at least 30
seconds are required between tests.
While the AI system operation using the hand–held tester
is prohibited, the tester displays the prohibition (WAIT or
ERROR). If the ERROR (AI STATUS NG) is displayed on the
tester, stop the engine for 10 minutes and then try again..
OK:
Standard:
Air pump operation
Tester Connection
Specified Condition
ON
A43–2 – Body ground
10 V or more
OFF
A43–2 – Body ground
Below 1.0 V
NG
Go to step 14.
OK
B17438
Wire Harness Side:
Air Pump Connector
A43
DI–438
–
DIAGNOSTICS
ENGINE
632
11
Check for open in harness and connector between air pump and body ground.
PREPARATION:
(a)
Remove the intake manifold (see page
).
(b)
Disconnect the A43 air pump connector.
CHECK:
Check the resistance between the wire harness side connec-
tors and body ground.
OK:
Standard:
Tester Connection
Specified Condition
A43–1 – Body ground
Below 1
Ω
NG
Repair or replace harness or connector.
OK
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