2001 TOYOTA SEQUOIA diagnostic menu

DI±300
± DIAGNOSTICSENGINE
494 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
HINT:
Read freeze frame data using the hand±held tester. Freeze frame data records the engine conditions when
a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was
running or stopped, if the engine was warmed up or not, if the air±fuel ratio was lean or rich, as well as other
data from the time when a malfunction occurred.
1 Connect hand±held tester, and check STA signal.
PREPARATION:
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch ON, and push the hand±held tester main switch ON.
(c) When using hand±held tester, enter the following menu: DIAGNOSIS / ENHANCED OBD II / DATA
LIST / ALL / STARTER SIG.
CHECK:
Read the STA signal on the hand±held tester while the starter operates.
OK:
Standard:
Ignition Switch PositionONSTART
STARTER SIGOFFON
OK Go to step 5.
NG
2 Check park/neutral position switch (See page DI±576).
NG Replace park/neutral position switch.
Go to next step 5 after the replacement.
OK
3 Check ignition switch (See page BE±24).
NG Replace ignition switch.
Go the next step 5 after the replacement.
OK

± DIAGNOSTICSENGINE
DI±301
495 Author: Date:
2005 SEQUOIA (RM1146U)
4 Connect hand±held tester, and check STA signal.
PREPARATION:
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch ON, and push the hand±held tester main switch ON.
(c) On the hand±held tester, enter the following menu: DIAGNOSIS / ENHANCED OBD II / DATA LIST
/ ALL / STARTER SIG.
CHECK:
Read the STA signal on the hand±held tester while the starter operates.
OK:
Standard:
Ignition Switch PositionONSTART
STARTER SIGOFFON
NG Repair or replace harness or connector.
OK
5 Check DTC reoccur
PREPARATION:
(a) Connect the hand±held tester.
(b) Turn the ignition switch ON and hand±held tester main switch ON.
(c) Clear DTC (See page DI±43).
(d) Drive the vehicle more than 40 km/h (25 mph) for 20 seconds or more.
CHECK:
Check DTC reoccur.
RESULT:
Display (DTC Output)Proceed to
P0617A
No DTC outputB
A Replace ECM (See page SF±80).
B
Check for intermittent problems
(See page DI±11).

A23671
Port APort B
Air
A23672
Port APort B
Battery Air
± DIAGNOSTICSENGINE
DI±321
515 Author: Date:
2005 SEQUOIA (RM1146U)
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
ºP1441 and/or P1444º and P2440A
P1441 and/or P1444B
ºP1441 and/or P1444 and/or P2440º and other DTCsC
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

A16555
AIR INJ CHECK
AIR PUMP............................ON
EASV ............................OPEN
ASV1. .............................OPEN
ASV2...............................OPEN
A/F BANK1......................19.05
A/F BANK2........................14.5
PRESSURE....................17 kPa
PULSATION..............25.39 kPa
AI STATUS...........................OK
Remaining Time 05 sec.
Press [EXIT] to quit
± DIAGNOSTICSENGINE
DI±325
519 Author: Date:
2005 SEQUOIA (RM1146U)
7 Check air switching valve No.2 operation.
PREPARATION:
(a) Start the engine and warm it up.
(b) Turn the ignition switch to OFF.
(c) Connect the hand±held tester to the DLC3.
(d) Start the engine and push the hand±held tester main
switch ON.
CHECK:
(a) Select the following menu items: DIAGNOSIS/EN-
HANCED OBD II/SYSTEM CHECK/ AIR INJ CHECK/
MANUAL OPERATION/OPERATION 5 and 6
HINT:
OPERATION 5: AP:ON, EASV:OPEN, ASV1:OPEN,
ASV2:CLOSE
OPERATION 6: AP:ON, EASV:OPEN, ASV1:CLOSE,
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..
(b) Read value of the A/F BANK1 and BANK2 on the hand±
held tester.
RESULT:
Air switching valve No.2 operationAir±fuel ratio
Open18 or more
CloseApproximately 14.5
HINT:

When the ASV No.2 operates normally, the A/F value is 18 or more when the valve is open, and approx-
imately 14.5 when the valve is closed.

Perform the following procedures only on the bank of which the valve is not close.
NEXT

A23646
Port A
DI±326
± DIAGNOSTICSENGINE
520 Author: Date:
2005 SEQUOIA (RM1146U)
8 Check VSV for air injection control operation.
PREPARATION:
(a) Turn the ignition switch OFF.
(b) Disconnect the vacuum hose from the VSV for air injec-
tion control.
(c) Connect the hand±held tester to the DLC3.
(d) Start the engine and turn the tester ON.
CHECK:
(a) Select the following menu items: DIAGNOSIS/EN-
HANCED OBD II/SYSTEM CHECK/ AIR INJ CHECK/
MANUAL OPERATION/OPERATION 1
(b) At this time, check that no negative pressure generates
at port A of the VSV.
HINT:
OPERATION 1: AP: OFF, EASV:CLOSE, ASV1:CLOSE,
ASV2:CLOSE
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:
No negative pressure is generated.
NG Go to step 10.
OK

B17426
± DIAGNOSTICSENGINE
DI±333
527 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM
Refer to DTC P1441, P1444 and P2440 on page DI±314.
INSPECTION PROCEDURE
1 Check any other DTCs output (In addition to secondary air injection system
DTCs).
PREPARATION:
(a) Connect a 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
ºP1442 and/or P1445º and P2441A
P1442 and/or P1445B
ºP1442 and/or P1445 and/or P2441º and other DTCsC
HINT:
If any DTCs other than P1441 and/or P1444 and P2440 are output, troubleshoot those DTCs first.
B Go to step 6.
C Go to DTC chart (See page DI±58).
A
2 Check vacuum hose between throttle body and VSV for air injection control.
CHECK:
(a) Check that the vacuum hoses between the throttle body
and VSV for air injection control are securely connected.
OK:
The vacuum hoses are securely connected.
CHECK:
(a) Check the vacuum hoses for blockage or damage.
OK:
The vacuum hoses are no blockages and damage.
NG Repair or replace vacuum hoses.
OK

B17440
A46
Air Switching Valve Connector Wire Harness Side:
DI±334
± DIAGNOSTICSENGINE
528 Author: Date:
2005 SEQUOIA (RM1146U)
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) Connect the hand±held tester to the DLC3.
(d) Turn the ignition switch ON and turn the tester ON.
CHECK:
(a) When the air switching valve is operated using the hand±
held tester, measure voltage between terminal A46±1 of
the air switching valve 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 4
HINT:
OPERATION 1: AP:OFF, EASV:CLOSE, ASV1:CLOSE,
ASV2:CLOSE
OPERATION 4: AP:OFF, EASV:OPEN, ASV1:CLOSE,
ASV2:CLOSE
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:
Tester operationTester ConnectionSpecified Condition
Operation 4A46±1 ± Body ground10 V or more
Operation 1A46±1 ± Body groundBelow 1.0 V
NG Go to step 12.
OK

A16555
AIR INJ CHECK
AIR PUMP............................ON
EASV ............................OPEN
ASV1. .............................OPEN
ASV2...............................OPEN
A/F BANK1.......................19.05
A/F BANK2.........................14.5
PRESSURE....................17 kPa
PULSATION..............25.39 kPa
AI STATUS...........................OK
Remaining Time 05 sec.
Press [EXIT] to quit
DI±336
± DIAGNOSTICSENGINE
530 Author: Date:
2005 SEQUOIA (RM1146U)
6 Check air switching valve No.2 operation.
PREPARATION:
(a) Start the engine and warm it up.
(b) Turn the ignition switch to OFF.
(c) Connect the hand±held tester to the DLC3.
(d) Turn the ignition switch to ON and push the hand±held
tester main switch ON.
CHECK:
(a) Select the following menu items: DIAGNOSIS/EN-
HANCED OBD II/SYSTEM CHECK/ AIR INJ CHECK/
MANUAL OPERATION/OPERATION 5 and 6
HINT:
OPERATION 5: AP:ON, EASV:OPEN, ASV1:OPEN,
ASV2:CLOSE
OPERATION 6: AP:ON, EASV:OPEN, ASV1:CLOSE,
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..
(b) Read value of the A/F BANK1 and BANK2 on the hand±
held tester.
RESULT:
Air switching valve No.2 operationAir±fuel ratio
Open18 or more
CloseApproximately 14.5
HINT:

When the ASV No.2 operates normally, the A/F value is 18 or more when the valve is open, and approx-
imately 14.5 when the valve is closed.

Perform the following procedures only on the bank of which the valve is not open.
NEXT