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 

SF–80

).

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 

EM–36

).

(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 

EM–36

).

(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