Toyota Tundra. Manual — part 1618
DTC OUTPUTS
HINT:
If the vacuum hose between the ASV and the pressure sensor is not connected correctly, case 4 may
occur.
By using the Techstream to perform the Air Injection Check operation in the System Check, the air-fuel
ratio and the pressure in the secondary air injection system passage can be checked while the secondary
air injection system is operating. This helps technicians to troubleshoot the system when it malfunctions.
Furthermore, Pending Codes also can be checked by performing Utility/Air Injection Check/Automatic
Mode after the repair.
Read freeze frame data using the Techstream. Freeze frame data records the engine condition when
malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was
moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other
data from the time the malfunction occurred.
System Check:
The pressure in the secondary air passage can be checked using the Techstream.
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.
Detected Conditions while
AIR operating: Air pump
ON, ASV Open
Detected Conditions while
AIR not operating: Air pump
OFF, ASV Closed
ECM Determination
DTCs Output
Case 1
Case 8
Normal
-
Case 1
Case 6
ASV stuck open
P2440 or P2442
Case 1
Case 7
Air pump stuck ON
P2444 or P2446
Case 2
Case 8
Air pump stuck OFF
P2445 or P2447
Case 3
Case 8
ASV stuck closed
P2441 or P2443
Case 1
Case 5
ASV stuck open and air
pump stuck ON
P2440 and
P2444 or P2442
and P2446
Case 2
Case 6
ASV stuck open and air
pump stuck OFF
P2440 and
P2445 or P2442
and P2447
Case 3
Case 7
ASV stuck closed and
air pump stuck ON
P2441 and
P2444 or P2443
and P2446
Case 4
Case 8
ASV stuck closed and
air pump stuck OFF
P2441 and
P2445 or P2443
and P2447
2009 Toyota Tundra
2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra
Saturday, June 19, 2010 7:34:45 PM
Page 565
© 2006 Mitchell Repair Information Company, LLC.
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)
displayed on the Techstream indicate the conditions shown in the table below.
Standard
DISPLAY CONDITIONS
i. Turn the ignition switch to OFF.
Operation
AIR PUMP
ASV
PRESSURES
(1)
PULSATION
(2)
AIR PUMP: ON, ASV: OPEN
ON
OPEN
2.4 kPa or more
20 kPa or more
AIR PUMP: OFF, ASV:
CLOSE
OFF
CLOSE
Less than 2.4 kPa
Less than 30 kPa
(1)
Average pumping pressure (gauge pressure). The pressure should be 2.4 kPa or more when the AIR
system operates.
(2)
The cumulative exhaust pulsation calculated by the ECM. If the calculated value exceeds a certain
level, the ECM determines that the exhaust pulsation is in the AIR system.
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 several minutes
2009 Toyota Tundra
2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra
Saturday, June 19, 2010 7:34:45 PM
Page 566
© 2006 Mitchell Repair Information Company, LLC.
1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO SECONDARY AIR INJECTION
SYSTEM DTCS)
a. Connect the Techstream to the DLC3.
b. Turn the ignition switch to ON and turn the Techstream ON.
c. Enter the following menus: Powertrain/Engine and ECT/Trouble Codes.
d. Read DTCs.
Result
DTC OUTPUT RESULT
If any DTCs other than P0412, P0415, P2440, P2441, P2442 and/or P2443 are output, troubleshoot
those DTCs first.
B: GO TO AIR SWITCHING VALVE INSPECTION PROCEDURE (P0412 AND P0415)
(See INSPECTION PROCEDURE )
C: GO TO DTC CHART
A: Go to Next Step
2. PERFORM ACTIVE TEST USING TECHSTREAM
a. Visual check
1. Start the engine and warm it up.
2. Turn the ignition switch off.
3. Disconnect the No. 1 air hose.
4. Connect the Techstream to the DLC3.
5. Turn the ignition switch to ON and turn the Techstream ON.
6. Enter the following menus: Powertrain/Engine and ECT/Utility/Air Injection Check/Manual
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.
Result
Proceed
to
P2440, P2441, P2442 and/or P2443 are output
A
P2440, P2441, P2442 and/or P2443 and P0412 and/or P0415 are output
B
P2440, P2441, P2442 and/or P2443 and other DTCs (except P0412 and P0415) are
output
C
2009 Toyota Tundra
2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra
Saturday, June 19, 2010 7:34:45 PM
Page 567
© 2006 Mitchell Repair Information Company, LLC.
Mode/AIR PUMP 1: ON, ASV1: OPEN, AIR PUMP 2: ON, ASV2: OPEN.
HINT:
When Manual Mode is selected, the Techstream initialization (atmospheric pressure
measurement) is performed automatically. The initialization takes 10 seconds. After the
initialization, AP and ASV operation can be selected.
Fig. 247: Checking Exhaust Gas Pressure Pulsates
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
7. Start the engine.
8. Perform the AIR system intrusive operation while the engine is idling.
9. Place your hand near the air switching valve port and check that the exhaust gas pressure
pulsates when the ASV is turned ON.
10. Enter the following menus: Powertrain/Engine and ECT/Utility/Air Injection Check/Manual
CAUTION: To avoid the danger of being burned by the exhaust gas,
bring your hand close to the valve port slowly.
2009 Toyota Tundra
2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra
Saturday, June 19, 2010 7:34:45 PM
Page 568
© 2006 Mitchell Repair Information Company, LLC.
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