Insert thin T-pins into the back of the harness connector where the wire enters the plastic housing. Shoving multimeter leads directly into the female front pins will stretch the metal terminals, resulting in permanent loose connections and intermittent misfires.
Because variant documentation can be sparse for Japanese Domestic Market (JDM) imports, you can reverse-engineer or verify your pinout using a digital multimeter (DMM): nissan zexel ecu pinout
Here is the most common pinout for a used on TD27T / RD28 engines. Insert thin T-pins into the back of the
Wakes up the internal microprocessor when the key turns to "ON". Wakes up the internal microprocessor when the key
Would you like the diagnostic flash code list for the Zexel diesel ECU as well?
Low compared to aftermarket options; enthusiasts often find it difficult to remap compared to modern Bosch units. Usage Tips for Mechanics Check by Part Number
This is the most common failure point. When the ECU sees a crank signal, it sends +12V to the spill control valve on the injection pump.