Toyota Sequoia (2005). Manual - part 131

–

DIAGNOSTICS

ENGINE

DI–319

513

MONITOR RESULT

Refer to page 

DI–26

 for detailed information.

The test value and test limit information are described as shown in the following table. Check the monitor
result and test values after performing the monitor drive pattern (refer to ”Confirmation Monitor”).

MID (Monitor Identification Data) is assigned to each emissions–related component.

TID (Test Identification Data) is assigned to each test value.

Scaling is used to calculate the test value indicated on generic tools.

Secondary air injection (AIR) system

MID

TID

Scaling

Description of Test Value

Minimum Test Limit

Maximum Test Limit

$71

$E1

Multiply by 0.01

(g/s)

Test value of AIR amount insufficient

Minimum test limit

Maximum test limit

$71

$E2

Multiply by 0.01

(kPa)

Test value of AIR pump stuck ON

Minimum test limit

Maximum test limit

$71

$E3

Multiply by 0.01

(kPa)

Test value of AIR pump stuck OFF

Minimum test limit

Maximum test limit

$71

$E4

Multiply by 0.01

(kPa)

Test value of AIR control valve ON

Minimum test limit

Maximum test limit

$71

$E5

Multiply by 0.01

(kPa)

Test value of AIR control valve OFF

Minimum test limit

Maximum test limit

$71

$E6

Multiply by 0.01

(kPa)

Test value of AIR pressure change for

AIR valve

Minimum test limit

Maximum test limit

$71

$E7

Multiply by 0.01

(kPa)

Test value of AIR pressure change for

AIR VSV bank 1

Minimum test limit

Maximum test limit

$71

$E8

Multiply by 0.01

(kPa)

Test value of AIR pressure change for

AIR VSV bank 2

Minimum test limit

Maximum test limit

$71

$E9

Multiply by 0.01

(kPa)

Test value of AIR pressure pulsation for

AIR VSV when AIR pressure is low

Minimum test limit

Maximum test limit

A23551

Engine Room J/B

ECM

E4

E4

E4

E4

B–W

IA4

IA4

IA4

IA4

IA4

EB4

ED2

ED2

B–W

2H

2A

6

8

EFI Relay

2

1

2F

1

W–B

J5
J/C

A

ED

Battery

Air Pump

Air Switching Valve

Air Injection Driver

A43

A46

A41

5

G–R

G–R

J2
J/C

A

A

EFI No.2

EFI No.1

3

5

2

2D

1

B

4

F10
FL Block

5

B

L

A40

1

EN

B

B

B

1

1

2

2

W

W–L

W–L

W

3

4

2

6

A40

A41

A41

A41

A41

A41

1

2

4

3

1

8

EB

W–B

W–B

W–B

BATT

VP

VV

E

SIP

DI

SIV

+B

R–W

R–W

8

3

9

G–W

G–W

GR–L

GR–L

4

25

13

AID

AIRP

AIRV

A/PUMP

2

MREL

14

DI–320

–

DIAGNOSTICS

ENGINE

514

WIRING DIAGRAM

A23671

Port A

Port B

Air

A23672

Port A

Port B

Battery

Air

–

DIAGNOSTICS

ENGINE

DI–321

515

INSPECTION PROCEDURE

1

Check any other DTCs output (In addition to secondary air injection system
DTCs).

PREPARATION:
(a)

Connect hand–held tester to the DLC3.

(b)

Turn the ignition switch to ON and turn the tester ON.

(c)

Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.

CHECK:
(a)

Read DTCs.

RESULT:

Display (DTC Output)

Proceed To

”P1441 and/or P1444” and P2440

A

P1441 and/or P1444

B

”P1441 and/or P1444 and/or P2440” and other DTCs

C

HINT:
If any DTCs other than P1441, P1444 or P2440 are output, troubleshoot those DTCs first.

B

Go to step 7.

C

Go to DTC chart (See page 

DI–58

).

A

2

Check air switching valve operation.

PREPARATION:
(a)

Remove the intake manifold (see page 

EM–36

).

(b)

Remove the air switching valve.

CHECK:
Blow air into port A and check that air is not discharged from port
B.
OK:

Not discharged

CHECK:
(a)

Apply battery positive across the terminals.

(b)

Blow air into port A and check that air is discharged from
port B.

OK:

Discharged

B17440

A46

Air Switching Valve Connector

Wire Harness Side:

DI–322

–

DIAGNOSTICS

ENGINE

516

NG

 Replace air switching valve and go to step 7.

OK

3

Check voltage between terminal 1 of air switching valve and body ground.

PREPARATION:
(a)

Remove the intake manifold (see page 

EM–36

).

(b)

Disconnect the A46 air switching valve connector.

(c)

Turn the ignition switch ON.

CHECK:
Measure the voltage between terminal 1 of the air switching
valve connector and body ground.
OK:

Standard:

Tester Connection

Specified Condition

A46–1 – Body ground

Below 1.0 V

NG

Go to step 4.

OK

Check for intermittent problems 
(See page 

DI–11

) and go to step 7.