Inspection Procedure

HINT:

• If different DTCs that are related to a different system are output simultaneously while terminal E2 is used as a ground terminal, terminal E2 may be open.
• Read freeze frame data using hand held tester or the OBD II scan tool. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air-fuel ratio was lean or rich, etc. at the time of the malfunction.

Hand-held tester: 

1. PERFORM ACTIVE TEST BY HAND HELD TESTER 
   1. Connect the hand held tester to the DLC3.
   2. Turn the ignition switch ON and push the hand held tester main switch ON.
   3. Enter ALL from DIAGNOSIS/ENHANCED OBD II/ACTIVE TEST/IACV MOTOR (IMRV motor).
   4. Scroll the data list by the up or down button to display IACV POSITION (IMRV position sensor).
   5. Check the voltage output of IACV POSITION while the IMRV motor is driven from full closed to full open (or from full open to full closed) using the hand held tester.

      Standard: The voltage output of IACV POSITION remains between 0.2 to 4.8 V while the IMRV motor is driven from -100 to 100 % (or from 100 to -100 %). 

   HINT:

   Fig 1: IACV Position Chart

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. OK: Go to step   5 
   2. NG: Go to next step. 
2. CHECK WIRE HARNESS (ECM - IMRV) 
   1. Disconnect the I18 IMRV connector.
   2. Disconnect the E10 ECM connector.
   3. Check the resistance of the wire harness side connectors.

      Standard: 

      Fig 2: IMRV Resistance Specification

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002