Toyota Tundra (2015 year). Manual — part 1663
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
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
MONITOR RESULT
Refer to Checking Monitor Status
.
CONFIRMATION DRIVING PATTERN
NOTICE:
This Secondary 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,
the prohibition (WAIT or ERROR).
If ERROR is displayed on the Techstream during the test, stop the engine for 10 minutes, and then
try again.
1.
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2444-P244...
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 output)
.
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.
8.
Enter the following menus: Powertrain / Engine and ECT / Utility / Secondary 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.
Perform the following to confirm the AIR system pending codes: Press the ENTER (Exit).
12.
Check for pending DTCs.
OK:
No pending DTC is output.
13.
After the "Secondary 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: P2444, P2445, P2446 or P2447.
15.
Check the DTC judgment result.
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.
16.
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:
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2444-P244...
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 stores 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
Pressure
Less than 2.4 kPa
Pulsation Detection
Exhaust gas pulsation detected
Pressure Condition in Secondary Air Injection System Case 3:
Air Pump
ON
Air Switching Valve
Closed
Pressure
2.4 kPa or more
Pulsation Detection
Exhaust gas pulsation not detected
Pressure Condition in Secondary Air Injection System Case 4:
Air Pump
OFF
Air Switching Valve
Close
Pressure
Less than 2.4 kPa
Pulsation Detection
Exhaust gas pulsation not detected
Pressure Condition in Secondary Air Injection System Case 5:
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 6:
Air Pump
OFF
Air Switching Valve
Open
Pressure
Less than 2.4 kPa
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2444-P244...
Pulsation Detection
Exhaust gas pulsation detected
Pressure Condition in Secondary Air Injection System Case 7:
Air Pump
ON
Air Switching Valve
Closed
Pressure
2.4 kPa or more
Pulsation Detection
Exhaust gas pulsation not detected
Pressure Condition in Secondary Air Injection System Case 8:
Air Pump
OFF
Air Switching Valve
Close
Pressure
Less than 2.4 kPa
Pulsation Detection
Exhaust gas pulsation not detected
If the detected pressure is high, the air pump is assumed to be ON and if it alternates sharply, the ASV is
HINT:
The exhaust pulsation value is calculated in the ECM. If the calculated value exceeds a certain level, the
ECM determines that the exhaust pulsation is in the AIR system.
HINT:
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
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2444-P244...
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