Toyota Tundra. Manual — part 1615
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
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
P2432, P2433, P2437 and P2438
TYPICAL ENABLING CONDITIONS - P2432, P2433, P2437 AND P2438
P2431 and P2436:
TYPICAL ENABLING CONDITIONS - P2431 AND P2436
TYPICAL MALFUNCTION THRESHOLDS
P2432 and P2437:
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)
-
Frequency of Operation
Continuous
Duration
P2432, P2433, P2437, P2438: 0.5 seconds P2431, P2436: 5 seconds
MIL Operation
P2432, P2433, P2437, P2438: Immediate P2431, P2436: 2 driving
cycles
Sequence of Operation
None
Monitor runs whenever following DTCs not present
None
All of following conditions met:
-
Starter
OFF
Battery voltage
8 V or more
Ignition switch
ON
Monitor runs whenever following DTCs
not present
P2432, P2433, P2437, P2438 (Secondary Air Injection System
Pressure Sensor)
Starter
OFF
Battery voltage
8 V or more
Ignition switch
ON
2009 Toyota Tundra
2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra
Saturday, June 19, 2010 7:34:45 PM
Page 553
© 2006 Mitchell Repair Information Company, LLC.
TYPICAL MALFUNCTION THRESHOLDS CONDITIONS - P2432 AND P2437
P2433 and P2438:
TYPICAL MALFUNCTION THRESHOLDS CONDITIONS - P2433 AND P2438
P2431 and P2436:
TYPICAL MALFUNCTION THRESHOLDS CONDITIONS - P2431 AND P2436
COMPONENT OPERATING RANGE
COMPONENT OPERATING RANGE
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 data
from the time the malfunction occurred.
1. CHECK HARNESS AND CONNECTOR (PRESSURE SENSOR - ECM)
a. Disconnect the D58 or D59 pressure sensor connector.
b. Disconnect the A24 and D74 ECM connectors.
Air pressure sensor voltage
Less than 0.5 V
Air pressure sensor voltage
More than 4.5 V
Air pressure
Less than 45.6 kPa (342 mmHg), or more than 135 kPa (1013 mmHg)
Air pressure sensor voltage
Between 0.5 V and 4.5 V
2009 Toyota Tundra
2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra
Saturday, June 19, 2010 7:34:45 PM
Page 554
© 2006 Mitchell Repair Information Company, LLC.
Fig. 245: Identifying D58 Or D59 Pressure Sensor With A24 And D74 ECM Connector
Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
c. Measure the resistance according to the value (s) in the table below.
2009 Toyota Tundra
2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra
Saturday, June 19, 2010 7:34:45 PM
Page 555
© 2006 Mitchell Repair Information Company, LLC.
Standard resistance
RESISTANCE SPECIFIED CONDITIONS
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: Go to Next Step
2. INSPECT AIR SWITCHING VALVE (PRESSURE SENSOR)
a. Connect a pressure gauge to the air pressure sensor as shown in the illustration.
Tester Connection
Condition Specified Condition
D58-3 (AIP) - A24-54 (AIP)
Always
Below 1 ohms
D58-2 (VC) - D74-67 (VCV1)
Always
Below 1 ohms
D58-4 (E2) - D74-98 (ETHA)
Always
Below 1 ohms
D59-3 (AIP2) - A24-53 (AIP2)
Always
Below 1 ohms
D59-2 (VC2) - D74-67 (VCV1)
Always
Below 1 ohms
D59-4 (E22) - D74-97 (ETHW)
Always
Below 1 ohms
D58-3 (AIP) or A24-S4 (AIP) - Body ground
Always
10 kohms or higher
D58-2 (VC) or D74-67 (VCV1) - Body ground
Always
10 kohms or higher
D59-3 (AIP2) or A24-53 (AIP2) - Body ground
Always
10 kohms or higher
D59-2 (VC2) or D74-67 (VCV1) - Body ground Always
10 kohms or higher
2009 Toyota Tundra
2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra
Saturday, June 19, 2010 7:34:45 PM
Page 556
© 2006 Mitchell Repair Information Company, LLC.
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