On-Vehicle Inspection

WARNING: This page is about a different car, the 2007 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.

CHECK PRESSURE SENSOR
1. Turn the ignition switch to the ON position.
2. Measure the voltage between terminals AIP and E2 of the ECM connector.
  Standard voltage: 1.0 to 2.2 V
  
  If the voltage is not as specified, inspect the ECM or harness (see DTC P2430 SECONDARY AIR INJECTION SYSTEM AIR FLOW / PRESSURE SENSOR CIRCUIT BANK 1: DTC P2431 SECONDARY AIR INJECTION SYSTEM AIR FLOW / PRESSURE SENSOR CIRCUIT RANGE / PERFORMANCE BANK 1: DTC P2432 SECONDARY AIR INJECTION SYSTEM AIR FLOW / PRESSURE SENSOR ).
  
  Fig 1: Identifying E8 ECM Connector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

CHECK VACUUM SWITCHING VALVE (for Air Injection System)

Disconnect the VSV connector.
Disconnect the 2 vacuum hoses from the VSV.

Fig 2: Disconnecting Vacuum Hoses From VSV
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance between the terminals.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
1 - 2	33 to 39 Ω at 20°C (68°F)
1 - Body ground	1 MΩ or higher
2 - Body ground	1 MΩ or higher

If the resistance is not as specified, replace the VSV.

Fig 3: Measuring Resistance Between Terminals

Apply air to the port as shown.
Check that air does not flow from port A.
If the result is not as specified, replace the VSV.

Fig 4: Applying Air To Port
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Apply positive battery voltage to the terminals, apply air to the port, and check that air flows from the port shown in the illustration.
If the result is not as specified, replace the VSV.
Connect the 2 vacuum hoses to the VSV.
NOTE: Be sure to connect the vacuum hoses correctly.
Connect the VSV connector.
Perform the "Check Vacuum Switching Valve" procedures above on the other VSV.

Fig 5: Applying Battery Voltage To Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

CHECK NO. 2 AIR SWITCHING VALVE
1. Disconnect the vacuum hose from the VSV for the air injection system.
2. Apply vacuum of 30 kPa (306 gf/cm² , 4.35 psi) to vacuum hose, and check that the vacuum does not decrease.
  If operation is not as specified, replace the No. 2 air switching valve.
  
  Fig 6: Disconnecting Vacuum Hose From VSV For Air Injection System
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Release the vacuum, and check that the operation sound is emitted from the No. 2 air switching valve.
  If operation is not as specified, replace the No. 2 air switching valve.
4. Perform the "Check No. 2 Air Switching Valve" procedures above on the other No. 2 air switching valve.
  
  Fig 7: Checking Air Switching Valve
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002