BMW Coupes and Sedans 1970-1988 Repair Guide

Time Switch

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TESTING



  1. Remove the time switch from the firewall.
  2.  
  3. Connect a test lamp between ground and the SV terminal of the time switch.
  4.  
  5. Remove the No. 4 wire from the ignition coil and actuate the starter. The test lamp should go out after a short time.
  6.  
  7. The injection time period of start valve is as follows:
    1. At 4°F (-15°C)-9-15 seconds
    2.  
    3. At 32°F (0°C)-4-10 seconds
    4.  
    5. At 95°F (35°C)-1 second
    6.  

  8.  
  9. Remove the terminal plug from the thermo-time switch. Actuate the starter; the light should go on for one second and then go out.
  10.  
  11. Connect a test lamp between the TH terminal and ground. The test lamp must light up as long as the starter is actuated.
  12.  

 
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