Toyota Tundra (2015 year). Manual — part 1277
DTC
NO.
DTC DETECTION CONDITION
TROUBLE AREA
P2431
P2436
Pressure sensor indicates less than 45.6 kPa (342 mmHg), or
more than 135 kPa (1013 mmHg) (2 trip detection logic)
Pressure sensor (Air
switching valve assembly)
Open or short in pressure
sensor circuit
ECM
P2432
P2437
Pressure sensor (Air
switching valve assembly)
Open or short in pressure
sensor circuit
ECM
P2433
P2438
Pressure sensor (Air
switching valve assembly)
Open or short in pressure
sensor circuit
ECM
MONITOR DESCRIPTION
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2431-P2433,...
The ECM monitors the pressure in the secondary air passage using the pressure sensor located on the air
switching valve in the secondary air injection system.
If there is a defect in the sensor or the sensor circuit, the voltage level deviates from the normal operating range,
the ECM interprets this deviation as a malfunction in the pressure sensor or circuit and stores a DTC.
MONITOR STRATEGY
Related DTCs
P2431: Air flow/Pressure sensor circuit rationality
P2432: Air flow/Pressure sensor circuit range check (Low voltage)
P2433: Air flow/Pressure sensor circuit range check (High voltage)
P2436: Air flow/Pressure sensor circuit rationality
P2437: Air flow/Pressure sensor circuit range check (Low voltage)
P2438: Air flow/Pressure sensor circuit range check (High voltage)
Required Sensors/Components (Main)
Pressure sensor
Required Sensors/Components (Related)
-
Duration
P2432, P2433, P2437, P2438: 0.5 seconds
P2431, P2436: 5 seconds
MIL Operation
P2432, P2433, P2437, P2438: Immediate
P2431, P2436: 2 driving cycles
TYPICAL ENABLING CONDITIONS
P2431 and P2436
Monitor runs whenever following DTCs not
present
P2432, P2433, P2437, P2438 (AIR pressure sensor -
Low/High)
Starter
OFF
Battery voltage
8 V or more
Ignition switch
ON
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2431-P2433,...
P2432, P2433, P2437 and P2438
Monitor runs whenever following DTCs not present
None
Starter
OFF
Battery voltage
8 V or more
Ignition switch
ON
TYPICAL MALFUNCTION THRESHOLDS
P2431 and P2436
Air pressure
Less than 45.63 kPa (342 mmHg), or more than 135 kPa (1013 mmHg)
P2432 and P2437
Air pressure sensor voltage
Less than 0.5 V
P2433 and P2438
Air pressure sensor voltage
More than 4.5 V
COMPONENT OPERATING RANGE
Air pressure sensor voltage
Between 0.5 V and 4.5 V
CONFIRMATION DRIVING PATTERN
NOTICE:
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.
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.
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2431-P2433,...
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 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: P2431, P2432, P2433, P2436, P2437 or P2438.
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:
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
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2431-P2433,...
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