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Engine Controls - System & Component Testing: Overhaul Lexus ES XV30 facelift

Testing & Diagnostics 5 illustrations ~369 words

Intake Air Control Valve Assembly (ES300)

Note. Do not adjust adjusting screw.

  1. With 7.9 in. Hg (27 kPa) of vacuum applied to actuator, check that actuator rod moves. (Scheme 200)
  2. One minute after applying vacuum, check that actuator rod does not return.
  3. If operation is not as specified, replace intake air control valve assembly.

Scheme 200

Scheme 200
Scheme 200

Intake Air Control Valve Assembly No. 2 (ES300)

Note. Do not adjust adjusting screw.

  1. With 7.9 in. Hg (27 kPa) of vacuum applied to actuator, check that actuator rod moves. (Scheme 201)
  2. One minute after applying vacuum, check that actuator rod does not return.
  3. If operation is not as specified, replace intake air control valve assembly. No. 2.

Scheme 201

Scheme 201
Scheme 201

Intake Air Control Valve Assembly No. 3 (ES300)

Note. Do not adjust adjusting screw.

  1. With 7.9 in. Hg (27 kPa) of vacuum applied to actuator, check that actuator rod moves.
  2. One minute after applying vacuum, check that actuator rod does not return.
  3. If operation is not as specified, replace intake air control valve assembly. No. 3.
  4. Using an ohmmeter, check that there is continuity between each terminal. Resistance should be 37-44 ohms at 68°F (20°C). (Scheme 202)
  5. Check that air flows from port "E" to filter.
  6. Apply battery voltage across terminals.
  7. Check that air flows from port "E" to port "F".
  8. Repair or replace as necessary.

Scheme 202

Scheme 202
Scheme 202

Air Cleaner Cap Sub-Assembly (ES300)

  1. Cover port "C" with finger and check that air flows from port "B" to port "A". (Scheme 203)
  2. Cover port "C" with finger and check that air does not flow from port "A" to port "B".
  3. Cover ports "A" and "C" with fingers, apply 18 in. Hg (60 kPa) of vacuum to port "B" and check that there is not change of vacuum after one minute.
  4. Repair or replace as necessary.

Scheme 203

Scheme 203
Scheme 203

Vacuum Switching Valve Assembly No. 1 (ES300)

  1. Using an ohmmeter, check that there is continuity between each terminal. Resistance should be 33-39 ohms at 68°F (20°C). (Scheme 204)
  2. Check that air flows from port "B" to filter.
  3. Apply battery voltage across terminals. Check that air flows from port "B" to port "A".
  4. Repair or replace as necessary.

Scheme 204

Scheme 204
Scheme 204

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