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Home >> Saab >> 1985 >> 900 S, 2D Hatchback, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Fuel Injection System - Turbo >> Testing >> Temperature Sensor

Temperature Sensor

  1. Unplug sensor wiring connector at sensor. Set ohmeter to 20K scale. Connect ohmeter across sensor terminals. When coolant temperature is at 32°F (0°C), resistance should be 5800 ohms. When coolant temperature is about 68°F (20°C), resistance should be about 2600 ohms. Set ohmeter to 2K scale. When coolant temperature is at 212°F (100°C), resistance should be 180 ohms.
    NOTE: Ignition must be off when connecting or disconnecting the ECU. Remove wiring harness connector from ECU prior to testing. Always probe from rear of connector to avoid elarging connector pin holes.
  2. Reconnect sensor wiring connector. Disconnect ECU harness connector from ECU. Set ohmeter to 20K scale. Connect ohmeter between ECU harness connector pins 2 and 11. When coolant temperature is 32°F (0°C), resistance should be 5800 ohms. When coolant temperature is 68°F (20°C), resistance should be about 2600 ohms. Set ohmeter to 2K scale. When coolant temperature is 212°F (100°C), resistance should be 180 ohms.
NOTE: If temperature sensor is replaced, proceed to FUEL INJECTION BASE LINE adjustment.
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