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Home >> Nissan-Datsun >> 1998 >> Sentra Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System & Component Tests >> Idle Control Systems >> Fast Idle Control Device (FICD) System Test >> Sentra & 200SX
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Sentra & 200SX

  1. Start engine and warm to operating temperature. Check idle speed. See SPECIFICATIONS article. Adjust idle speed if necessary. See ADJUSTMENTS article. Turn A/C switch and blower fan switch on. Idle speed should increase. If idle speed does not increase, go to next step. If idle speed increases, system is functioning properly.
  2. Ensure A/C compressor functions normally. If compressor is not functioning, repair A/C system as necessary. If compressor is functioning, go to next step.
  3. Turn ignition off. Disconnect FICD solenoid harness connector. Start engine and let it idle. Using DVOM, measure voltage between ground and FICD harness connector terminal No. 1 (Blue/Red wire). Battery voltage should be present. If battery voltage is present, go to next step. If battery voltage is not present, check 7.5-amp fuse. If fuse is okay, repair open in Blue/Red wire. Also check A/C relay and Light Green wire between A/C relay and fuse block. Repair or replace as necessary.
  4. Turn ignition off. Check continuity between ground and FICD solenoid harness connector terminal No. 2 (Black wire). Continuity should exist. If continuity exists, go to next step. If continuity does not exist, repair open in Black wire.
  5. Check FICD solenoid. See FAST IDLE CONTROL DEVICE (FICD) SOLENOID . If FICD solenoid is okay, check PCM and harness connector terminals for pushed-out, damaged, or corroded terminals. Repair or replace as necessary.
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