There is no signal from the crankshaft position sensor of B 12 engine.

Wuling Glory b 12 engine reported a fault after hot car, but there was no signal from the crankshaft position sensor, the cold car was fine, the throttle valve backfired, the timing was checked, and there were problems with the spark plug and cylinder line.

Replace the crankshaft position sensor, and the fault still exists. It's no use swapping the computer boards of two cars. When the computer board was installed in another car, everything was fine. Check whether the wires from each sensor to the computer board are normal.

principle of operation

The crankshaft position sensor is usually installed at the front end of the crankshaft (at the pulley), near the rear end of the crankshaft of the big flywheel or in the middle of the crankshaft. It is also installed in the distributor of early models and is one of the most important sensors in the control system.

Its function is to detect the engine speed, so it is also called speed sensor; It detects the top dead center position of the piston, so it is also called top dead center sensor, which includes detecting the top dead center signal of each cylinder for controlling ignition and detecting the top dead center signal of the first cylinder for controlling sequential fuel injection.