Toyota Tundra (2015 year). Manual — part 2028
(a) Cumulative intake air amount
100 gm/sec or more
(b) Difference between starting temperature and current temperature
10°C (18°F) or higher
(c) Starting coolant temperature
60°C (140°F) or higher
AIR pump
OFF
AIR valve
Close
Engine speed
Less than 4800 rpm
Time after engine started
1 second or more
Time after AIR in operation
10 seconds or more
AIR valve open stuck
Not detected
AIR pressure sensor open stuck (DTC P2445, P2447)
Not in operation
Engine load
20% or more
TYPICAL MALFUNCTION THRESHOLDS
Secondary Air Injection ON (Condition 1)
Following conditions are met during AIR ON
-
Cumulative pressure pulsation
10 kPa or higher
AIR pressure
2.4 kPa or higher
Secondary Air Injection ON (Condition 2)
Following conditions are met during AIR ON
-
Cumulative pressure pulsation
10 kPa or higher
AIR pressure
Below 2.4 kPa
Secondary Air Injection ON (Condition 3)
Following conditions are met during AIR ON
-
Cumulative pressure pulsation
Below 10 kPa
AIR pressure
2.4 kPa or higher
Secondary Air Injection ON (Condition 4)
Following conditions are met during AIR ON
-
Cumulative pressure pulsation
Below 10 kPa
AIR pressure
Below 2.4 kPa
Secondary Air Injection OFF (Condition 1)
Following conditions are met during AIR OFF
-
Cumulative pressure pulsation
30 kPa or higher
AIR pressure
2.4 kPa or higher
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2440-P2443;...
Secondary Air Injection OFF (Condition 2)
Following conditions are met during AIR OFF
-
Cumulative pressure pulsation
30 kPa or higher
AIR pressure
Below 2.4 kPa
Secondary Air Injection OFF (Condition 3)
Following conditions are met during AIR OFF
-
Cumulative pressure pulsation
Below 30 kPa
AIR pressure
2.4 kPa or higher
Secondary Air Injection OFF (Condition 4)
Following conditions are met during AIR OFF
-
Cumulative pressure pulsation
Below 30 kPa
AIR pressure
Below 2.4 kPa
P2440, P2442 AIR valve is stuck open (Case 1)
Either condition is met:
(a) or (b)
(a) AIR OFF Condition 1
Met
(b) AIR OFF Condition 2
Met
P2441, P2443 AIR valve is stuck closed
Either condition is met:
(a) or (b)
(a) AIR ON Condition 3
Met
(b) AIR ON Condition 4
Met
P2440, P2442 AIR valve is stuck open (Case 2)
Cumulative pressure pulsation
100 kPa or higher
MONITOR RESULT
Refer to Checking Monitor Status
.
CONFIRMATION DRIVING PATTERN
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2440-P2443;...
NOTICE:
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.
1.
Turn the ignition switch off.
2.
Connect the Techstream to the DLC3.
3.
Turn the ignition switch to ON.
4.
Turn the Techstream on.
5.
Clear DTCs (if set)
.
6.
Turn the ignition switch off and wait for at least 30 seconds.
7.
Turn the ignition switch to ON and turn the Techstream on [A].
8.
Enter the following menus: Powertrain / Engine and ECT / Utility / Air injection check / Automatic
Mode.
9.
Start the engine after the Techstream initialization is finished.
10.
Perform the System Check operation by pressing ENTER (Next).
11.
After operating the AIR system, perform the following to confirm the AIR system pending codes:
Press the ENTER (Exit).
12.
Check pending DTCs [B].
OK:
No pending DTC is output.
13.
After the "Air injection check" is completed, check for All Readiness by entering the following
menus: Powertrain / Engine and ECT / Utility / All Readiness.
14.
Input the DTC: P2440, P2441, P2442 or P2443.
15.
Check the DTC judgment result.
16.
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2440-P2443;...
TESTER
DISPLAY
DESCRIPTION
NORMAL
DTC judgment completed
System normal
ABNORMAL
DTC judgment completed
System abnormal
INCOMPLETE
DTC judgment not completed
Perform driving pattern after confirming DTC enabling conditions
N/A
Unable to perform DTC judgment
HINT:
If the judgment result shows NORMAL, the system is normal.
If the judgment result shows ABNORMAL, the system has a malfunction.
If the test result is INCOMPLETE or N/A and no pending DTC is output, perform a universal trip and
check for permanent DTCs
.
HINT:
If no permanent DTC is output, the system is normal.
If a permanent DTC is output, the system is malfunctioning.
17.
Turn the ignition switch off.
18.
WIRING DIAGRAM
Refer to DTC P0412
.
INSPECTION PROCEDURE
HINT:
Determination by ECM monitoring:
The ECM locates malfunctions in the Secondary Air Injection (AIR) system by detecting the pressure in
the AIR passage between the air pump and Air Switching Valve (ASV) and sets a DTC. Soon after cold
engine starts, the monitor runs for a short time while the AIR system is both ON and OFF. The ECM
detects both the pressure and the exhaust pulsation and compares them.
The following 8 patterns are AIR system pressure conditions in the AIR system passage.
Pressure Condition in Secondary Air Injection System Case 1:
Air Pump
ON
Air Switching Valve
Open
Pressure
2.4 kPa or more
Pulsation Detection
Exhaust gas pulsation detected
Pressure Condition in Secondary Air Injection System Case 2:
Air Pump
OFF
Air Switching Valve
Open
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2440-P2443;...
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