2UZ-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2430-P2433; Secondary Air Injection System Air Flow / Pressure Sensor Circuit Bank1; 2006 MY LX470 [05/2005

Last Modified: 4-30-2014	6.6 C	Doc ID: RM000001BIT002X
Model Year: 2006	Model: LX470	Prod Date Range: [05/2005 - ]
Title: 2UZ-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2430-P2433; Secondary Air Injection System Air Flow / Pressure Sensor Circuit Bank1; 2006 MY LX470 [05/2005 - ]

DTC

P2430

Secondary Air Injection System Air Flow / Pressure Sensor Circuit Bank1

DTC

P2431

Secondary Air Injection System Air Flow / Pressure Sensor Circuit Range / Performance Bank1

DTC

P2432

Secondary Air Injection System Air Flow / Pressure Sensor Circuit Low Bank1

DTC

P2433

Secondary Air Injection System Air Flow / Pressure Sensor Circuit High Bank1

DESCRIPTION

DTC No.	DTC Detection Condition	Trouble Area
P2430	While the engine is running, if voltage output of the pressure sensor indicates 0.1V or less, or indicates 4.8 V or more. (1 trip detection logic)	Pressure sensor Open or short in pressure sensor circuit ECM
P2431	The pressure sensor indicates less than 45 kPa (338 mHg), or more than 135 kPa (1013 mHg). (1 trip detection logic)	Pressure sensor Open or short in pressure sensor circuit ECM
P2432	While the engine is running, if voltage output of pressure sensor remains below 0.1 V. (1 trip detection logic)	Pressure sensor Open or short in pressure sensor circuit ECM
P2433	While the engine is running, if voltage output of the pressure sensor remains above 4.8 V. (1 trip detection logic)	Pressure sensor Open or short in pressure sensor circuit ECM

MONITOR DESCRIPTION

The ECM observes 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 will deviate from the normal operating range, the ECM interprets this deviation as a defect in the pressure sensor circuit and sets a DTC.

MONITOR STRATEGY

Related DTCs	P2430: Air flow/pressure sensor circuit range check (Fluctuating) 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)
Required sensors/Components	Pressure sensor
Frequency of operation	Continuous
Duration	P2430, P2432, P2433: 0.5 second P2431: 5 second
MIL operation	P2430, P2432, P2433: Immediate P2431: 2 driving cycles
Sequence operation	None

TYPICAL ENABLING CONDITIONS

The monitor will run whenever this DTC is not present	-
Starter	OFF
Time after starter turned from ON to OFF	2 seconds or more
Battery voltage	8 V or more
Ignition switch	ON

TYPICAL MALFUNCTION THRESHOLDS

P2430:

Air pressure sensor voltage

Less than 0.1 V, or more than 4.8 V

P2431:

Air pressure

Less than 338 mmHg (45 kPa), or more than 1013 mmHg (135 kPa)

P2432:

Air pressure sensor voltage

Less than 0.1 V

P2433:

Air pressure sensor voltage

More than 4.8 V

WIRING DIAGRAM

INSPECTION PROCEDURE

HINT:

Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, 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.

PROCEDURE

1.	CHECK HARNESS AND CONNECTOR (PRESSURE SENSOR - ECM)

(a) Check harness and connector .

REPAIR OR REPLACE HARNESS AND CONNECTOR

2.	INSPECT PRESSURE SENSOR

(a) Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3.

(b) Turn the ignition switch ON and push the intelligent tester main switch ON (Do not start engine).

(d) Check the pressure displayed on the intelligent tester.

Standard pressure:

45 kPa to 135 kPa

REPLACE PRESSURE SENSOR

REPLACE ECM