TwinTurbo.NET: Nissan 300ZX forum - Problem with ECM
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Subject Problem with ECM
     
Posted by Darkfelloww on January 01, 2024 at 10:30 AM
  This message has been viewed 220 times.
     
     
Message 96TT 5-spd.
Happy new year all. CEL came on and local Nissan shop diagnosed to bad ECM after we had replaced the crank sensor and fixed sub-harness during previous CEL visits. Need advise. I don't believe it is affecting drivability but would like to know my options. Here's the diagnosis script from the shop:

CHECKED CRANK SENSOR IS AT 200.5 OHM
CHECKED ECM 47 TO CRANK SENSOR 1 - 0.6 OHM
PIN 2 ON CRANK SENSOR IS 1.2 OHM TO BATTERY NEGATIVE
HAVE NO SIGNAL VOLTAGE COMING OPUT OF ECM ON PIN 47

CONFIRMED WITH TECHLINE SHOULD HAVE SIGNAL VOLTAGE COMING FROM ECM ON PIN 47. TECHLINE ADVISED AS LONG AS ECM POWERS AND GROUNDS ARE GOOD TO REPLACE ECM

CONFIRMED ECM POWER AND GROUND ARE GOOD. WILL NEED TO REPLACE ECM.

Thanks.

     
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