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OBD-II PIDs (On-board diagnostics Parameter IDs) are codes used to request data from a vehicle, used as a diagnostic tool.. SAE standard J1979 defines many OBD-II PIDs. All on-road vehicles and trucks sold in North America are required to support a subset of these codes, primarily for state mandated emissions inspections.
An ECU from a Geo Storm An electronic control unit ( ECU ), also known as an electronic control module ( ECM ), is an embedded system in automotive electronics that controls one or more of the electrical systems or subsystems in a car or other motor vehicle .
1937–1941 Nissan 80 Truck (based on the Graham Paige truck) 1937–1941 Nissan 90 Bus; 1939–1941 Nissan Type 50; 1941 Nissan Type 30; 1941 Nissan Type 53; 1941–1952 Nissan 180 Truck (based on the 1937–1941 Chevrolet 133/158 trucks) 1941–1949 Nissan 190 Bus; 1949-1951 Nissan 290 Bus; 1952–1953 Nissan 380 Truck 1952-1953 Nissan 390 Bus
An engine control unit (ECU), also called an engine control module (ECM), [1] is a device that controls various subsystems of an internal combustion engine. Systems commonly controlled by an ECU include the fuel injection and ignition systems.
[2] [3] NVTCS equipped Nissan engines do not have as high of engine speeds as VTEC equipped engines so NVTCS is simpler, quieter, and requires no special maintenance. [ citation needed ] Some Nissan engines only have N-VTC on the intake cam such as the GA16DE, QG16/18, SR20DE/DET (S14-15) or RB25DE/DET (R33-R34 GTS/GTS-T, GT/GTT) while others ...
It is generally a combined controller consisting of the engine control unit (ECU) and the transmission control unit (TCU). On some cars, such as many Chryslers, there are multiple computers: the PCM, the TCU, and the Body Control Module (BCM), for a total of three separate computers. These automotive computers are generally very reliable.
The typical modern TCU uses signals from engine sensors, automatic transmission sensors and from other electronic controllers to determine when and how to shift. [2] More modern designs share inputs or obtain information from an input to the ECU, whereas older designs often have their own dedicated inputs and sensors on the engine components.
Nissan does not have a letter designation for the SOHC configuration so the camshaft configuration type is assumed as SOHC if no letter is present. Another example is the MR16DDT engine, which has feature designations that describe an engine with dual overhead camshafts, direct cylinder fuel injection and a single turbocharger.