Toyota Tundra. Manual — part 1623

c. Connect the Techstream to the DLC3.

d. Turn the ignition switch to ON and turn the Techstream ON.

e. Enter the following menus: Powertrain/Engine and ECT/Utility/Air Injection Check/Manual

Mode/AIR PUMP 1: ON, ASV1: OPEN, AIR PUMP 2: ON, ASV2: OPEN and AIR PUMP 1:
OFF, ASV1: CLOSE, AIR PUMP 2: OFF, ASV2: CLOSE.

HINT:

When Manual Mode is selected, the Techstream initialization (atmospheric pressure measurement)
is performed automatically. The initialization takes 10 seconds. After the initialization, AIR PUMP
and ASV operation can be selected.

f. Start the engine.

g. Perform the AIR system intrusive operation while the engine is idling.

h. Check that the air pump (AIR PUMP), ASV and pressure in the AIR system passage (PRESSURE)

status displayed on the Techstream indicate the conditions shown in the table below.

Standard

DISPLAY CONDITIONS

i. Turn the ignition switch off.

Operation

AIR PUMP

ASV

PRESSURE

(1)

AIR PUMP: ON, ASV: OPEN

ON

ON

2.4 kPa or more

AIR PUMP: OFF, ASV: CLOSE

OFF

OFF

Less than 2.4 kPa

(1)

Average pumping pressure. The pressure should be 2.4 kPa or more when the AIR system
operates.

NOTE:



This Air Injection Check only allows technicians to operate the
AIR system for a maximum of 5 seconds.

Furthermore, the check can only be performed up to 4 times per
trip. If the test is repeated, intervals of at least 30 seconds are
required between checks.

While AIR system operation using the Techstream is prohibited,
the Techstream display indicates the prohibition (WAIT or
ERROR).

If an ERROR is displayed on the Techstream during the test,
stop the engine for 10 minutes, and then try again.



Performing the Air Injection Check repeatedly may cause
damage to the AIR system. If necessary, leave an interval of

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

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© 2006 Mitchell Repair Information Company, LLC.

NG: Go to step 4

OK: Go to Next Step

3. CHECK WHETHER DTC OUTPUT RECURS (DTC P2444, P2445, P2446 AND/OR P2247)

a. Start the engine and warm it up.

b. Turn the ignition switch off.

c. Connect the Techstream to the DLC3.

d. Turn the ignition switch to ON and turn the Techstream ON.

e. Clear DTCs (if output) (see DTC CHECK/CLEAR ).

f. Enter the following menus: Powertrain/Engine and ECT/Utility/Air Injection Check/Automatic

Mode.

g. Start the engine after the Techstream initialization is finished.

h. Perform the System Check operation by pressing Next.

i. After operating the AIR system, perform the following to confirm the AIR system pending codes:

Press the Exit button.

j. Check pending DTCs.

k. Turn the ignition switch off.

Result

DTC OUTPUT RESULT

B: CHECK FOR INTERMITTENT PROBLEMS (See CHECK FOR INTERMITTENT
PROBLEMS )

several minutes between System Check operations to prevent
the system from overheating.



When performing the Air Injection Check operation after the
battery cable has been reconnected, wait for 7 minutes with the
ignition switch turned to ON or the engine running.



Turn the ignition switch off when the Air Injection Check
operation finishes.

NOTE:



When performing the Air Injection Check operation after the
battery cable has been reconnected, wait for 7 minutes with the
ignition switch turned to ON or the engine running.



Turn the ignition switch off when the Air Injection Check
operation finishes.

Result

Proceed to

P2444, P2445, P2446 and/or P2447 are output

A

No pending DTC is output

B

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

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© 2006 Mitchell Repair Information Company, LLC.

A: Go to Next Step

4. CHECK VACUUM HOSES (PRESSURE SENSOR - AIR SWITCHING VALVE)

a. Check the vacuum hose connections with the pressure sensor and ASV.

b. Inspect the vacuum hose for blockages and damage.

OK:

Vacuum hose has no blockages or damage.

NG: REPAIR OR REPLACE VACUUM HOSE

OK: Go to Next Step

5. INSPECT AIR SWITCHING VALVE (PRESSURE SENSOR) (See INSPECTION PROCEDURE )

NG: REPLACE AIR SWITCHING VALVE (See REMOVAL )

OK: Go to Next Step

6. CHECK AIR INJECTION SYSTEM PIPE CONNECTIONS

Fig. 251: Identifying Air Injection System Pipe Connections
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

a. Check that all the pipes and hoses between the air pump and ASV are securely connected.

b. Inspect the pipes and hoses for blockages and damage.

OK:

AIR system piping has no blockages or damage.

NG: REPAIR OR REPLACE AIR INJECTION SYSTEM PIPING

OK: Go to Next Step

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

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7. INSPECT AIR PUMP

a. Disconnect the D56 or D57 air pump connector.

Fig. 252: Identifying D56 Or D57 Air Pump Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

b. Measure the resistance according to the value (s) in the table below.

Standard resistance

RESISTANCE SPECIFIED CONDITIONS

If the result is not as specified, replace the air pump.

HINT:

To check the air pump operation, use the Air Injection Check function described in the System
Check.

NG: REPLACE AIR PUMP (See REMOVAL )

OK: Go to Next Step

8. INSPECT AIR INJECTION CONTROL DRIVER (AIR INJECTION CONTROL DRIVER

POWER SOURCE CIRCUIT)

a. Disconnect the D48 and D50 or D52 and D54 AID connectors.

Tester Connection Condition Specified Condition

2 - 1

20°C (68°F)

0.44 to 1 ohms

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

Saturday, June 19, 2010 7:34:46 PM

Page 588

© 2006 Mitchell Repair Information Company, LLC.