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Home >> Alfa Romeo >> 1988 >> Spider Graduate >> Repair and Diagnosis >> Engine Performance >> System >> Fuel Injection System - BOSCH AFC >> Testing >> THERMO Time Switch
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THERMO Time Switch

  1. When coolant temperature is between 86-104°F (30-40°C), thermo time switch will remain closed for a maximum of 8 seconds.
  2. Disconnect electrical connector from thermo time switch. Using an ohmmeter, measure resistance between terminal "W" of switch and ground. Ohmmeter should indicate zero ohms with coolant temperature less than 86°F (30°C). With coolant temperature more than 104°F (40°C), ohmmeter should read 100-160 ohms.
NOTE: For all other models, refer to appropriate article in COMPUTERIZED ENGINE CONTROL section.
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