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NS8 ,Code 43 - Ignition Control Circuit Check

  1. Connect DRB II to engine harness connector. Put system in Diagnostic Test Mode. Turn ignition off. Disconnect coil wire from distributor cap and hold wire 1/4" away from good ground. Disconnect 60-pin connector from SMEC. Connect one end of a jumper wire to cavity No. 34 of 60-pin connector. Turn ignition on.
    Fig 1: Ignition Control Circuit Check (All Engines) "A"
    G55906
  2. Press and hold ATM key on DRB II. Touch other end of jumper wire to good ground. Make and break this connection several times. If there is spark as you make and break this connection, replace SMEC for a defective logic board. Before replacing SMEC, ensure terminal in cavity No. 34 is not damaged causing a poor connection.
  3. If there is no spark as you make and break the connection, turn ignition off. Remove jumper wire from 60-pin connector. Disconnect 14-pin connector from SMEC. Connect ohmmeter leads to 60 pin connector cavity No. 34 and 14-pin connector cavity No. 13.
    Fig 2: Ignition Control Circuit Check (All Engines) "B"
    G55907
  4. If there is continuity, replace SMEC for a defective power board. Before replacing SMEC, ensure terminal in cavity No. 13 is not damaged causing a poor connection. If there is no continuity, repair Yellow wire to cavity No. 13 for an open circuit.
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