Nissan Repair: computer pin-out check procedure 1991 240sx, test light, 240sx

Question
checking the cas circuit for a bad wire to one or more of the injectors. dont have access to all-data, would you happen to know the parameters for checking the cas and/or injectors.
car is actually 1992 240sx but because it was the last year of production of the sr-13 its easier to say 1991

Answer
Harry,

Use a test light at the injector harness and back probe the wires, one at a time for pulses while the vehicle is running or the engine is being turned over.  Haynes or Chilton has the wirging diagram in the back of the book.  But, you can look at each injector plug, determine the color, and trace it back where the bundle plugs into the Electronic Control Module.  I bet the injectors are bad and not the harness.  I would do an ohms check on the injectors and compare the readings against each injector and the values given in the book.