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Home >> Daihatsu >> 1988 >> Charade CSX, G100 >> Repair and Diagnosis >> Engine Performance >> System >> EFI Control System >> Testing >> Component Testing >> Idle-Up VSV
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Idle-Up VSV

  1. Disconnect negative battery cable. Remove glove compartment subassembly. Connect ECU Check Sub Harness (09842-87704 000 ) between ECU and engine wire.
  2. Reconnect negative battery cable. Disconnect rubber hose connected to idle-up VSV. Connect a vacuum pump to idle-up VSV and apply 3.94 in. Hg. If no vacuum is present, replace idle-up VSV.
  3. Turn all accessories off. Turn ignition on. Ensure that vacuum applied in step 2) becomes zero. If vacuum fails to become zero, check that voltage is present between ECU Check Sub Harness terminals "VSV" (37) and "E01" (21).
  4. If no voltage is present, check that resistance between VSV terminals is within 30-50 ohms range. If resistance is not to specification, replace idle-up VSV. If resistance between VSV terminals is within specification, check wiring between ECU and main relay and repair wiring (as necessary).
  5. Start engine. After one minute, connect a vacuum pump to idle-up VSV and apply 3.94 in. Hg. If no vacuum is present, check and/or repair wiring between VSV and ECU.
  6. If wiring is good, check that there is voltage between ECU Check Sub Harness terminals "DSW" (17) and "E01" (21). If voltage is present, check wiring between headlight switch and/or defogger switch and ECU.
  7. Turn headlight and/or defogger switch on. Ensure that vacuum applied in step 5) becomes zero. If vacuum fails to become zero, check that there is voltage between ECU Check Sub Harness terminals "DSW" (17) and "E01" (21).
  8. If no voltage is present, check wiring between headlight and/or defogger switch and ECU. Repair wiring (as necessary). Turn headlight and/or defogger switch off. Apply 3.94 in. Hg to idle-up VSV.
  9. Turn blower fan switch on. Check that vacuum applied in step 8) becomes zero. If vacuum fails to become zero, check wiring between idle-up VSV and blower fan switch. Repair wiring (as necessary).
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