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Home >> Saab >> 1994 >> 900 Base, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Idle Control System >> Engine Controls - System/Component Tests >> Transmission Range Switch (Except 9000 Series Turbo)
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Transmission Range Switch (Except 9000 Series Turbo)

  1. IAC valve receives a signal from transmission range switch. "D" (Drive) light on trip computer will glow if system is working properly.
  2. If system is not working properly, inspect fuse No. 13 on 900 Series, or fuse No. 9 on 9000 Series.
  3. With ignition on, check for battery voltage at White wire at switch, located at base of transmission selector lever. If battery voltage does not exist, repair White wire back to fuse panel.
  4. Set transmission selector lever to Park and Neutral positions in turn. With ignition on, no voltage should exist at Orange wire on switch with lever in either position. With lever in all other positions, battery voltage should exist at Orange wire. If voltage is as specified, go to next step. Replace switch if it does not meet specification.
  5. Connect DVOM to pin No. 30 (Orange wire) at fuel injection ECM. Battery voltage should exist with switch in all positions but Park or Neutral. Repair Orange wire between switch and ECM if battery voltage does not exist.
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