On-Vehicle Inspection

INSPECT MASS AIR FLOW METER
1. When using the hand-held tester: Inspect operation.
  1. Connect the hand-held tester to the DLC3.
  2. Turn the ignition switch ON.
  3. Blow air into the MAF meter, and check that the air flow value of the CURRENT DATA changes.
    
    Fig 1: Blowing Air Into MAF Meter
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  If operation is not as specified, check the MAF meter (See INSPECTION ), wiring and ECM.
2. When not using the hand-held tester: Inspect operation.
  1. Turn the ignition switch ON.
  2. Connect the positive tester probe of the voltmeter to terminal VG of the ECM, and the negative tester probe of the voltmeter to terminal E2G of the ECM.
    
    Fig 2: Connecting Positive Tester Probe To Terminal VG And Negative Tester Probe To Terminal E2G
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. Blow air into the air flow meter, and check if the voltage fluctuates.
  If operation is not as specified, check the MAF meter (See INSPECTION ), wiring and ECM.
INSPECT THROTTLE BODY
1. Check for an operating sound.
  1. Turn the ignition switch ON.
  2. When turning the accelerator pedal position sensor lever, listen to a running sound of the motor. Also, check that there is no friction sound.
  If operation is not as specified, check the throttle control motor (See INSPECTION ), wiring and ECM.
  
  Fig 3: Checking Operating Sound
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Inspect the throttle position sensor.
  1. Connect the hand-held tester to the DLC3.
  2. Turn the ignition switch ON.
  3. When turning the accelerator pedal position sensor lever to the full-open position, check the throttle valve opening percentage (THROTTLE POS) of the CURRENT DATA.
  Standard throttle valve opening percentage: 60% or more
  
  If the result is not as specified, check the accelerator pedal position sensor (See DTC P2120, P2122, P2123, P2125, P2127, P2128, P2138: THROTTLE/PEDAL POSITION SENSOR/SWITCH "D & E" CIRCUIT LOW/HIGH INPUT & THROTTLE/PEDAL POSITION SENSOR/SWITCH "D & E" VOLTAGE CORRELATION ), wiring and ECM. If the hand-held tester is not available, measure the voltage between the terminals (VTA1 - E2, VTA2 - E2) of the ECM connector (See TERMINALS OF ECM ).
3. Inspect the air assist system.
  1. Start the engine and check that the MIL does not light up.
  2. Warm up the engine to the normal operating temperature.
  3. Switch the A/C compressor from ON to OFF, and check the idle speed.
  Idle speed (Transmission in neutral): 700 +/- 50 rpm
  
  NOTE: Perform this inspection while no electrical load is applied.
4. Perform the driving test.
INSPECT ACCELERATOR PEDAL POSITION SENSOR
1. Connect the hand-held tester to the DLC3.
2. Turn the ignition switch ON.
3. Check if the voltage (ACCEL POS) of the CURRENT DATA indicates the standard value.
  - Accelerator pedal released: 0.5 to 1.1 V
  - Accelerator pedal depressed: 2.6 to 4.5 V
4. Check if the voltage (ACCEL POS #2) of the CURRENT DATA indicates the standard value.
  - Accelerator pedal released: 1.2 to 2.0 V
  - Accelerator pedal depressed: 3.4 to 5.3 V
If the hand-held tester is not available, measure the voltage between the terminals (VPA - EPA, VPA2-EPA2) of the ECM connector (See TERMINALS OF ECM ).

INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSY

Connect the hand-held tester (with CAN VIM) to the DLC3.

Fig 4: Connecting Hand-Held Tester (With CAN VIM) To DLC3
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Turn the ignition switch ON.
Start and warm up the engine.
Connect the hand-held tester and select VVT from the ACTIVE TEST menu.

Check the engine speed when the OCV is operated by the hand-held tester.

Idle speed: 650 to 750 rpm

OK:

CAMSHAFT TIMING OIL CONTROL VALVE

Condition	Specified Condition
VVT system is OFF (OCV is OFF)	Normal engine speed
VVT system is ON (OCV is ON)	Rough idle or engine stalled