koliosb wrote: ↑
Wed Feb 03, 2021 12:34 pm
I have read on the page https://1jzmerc.com/hks-faq/hardware/
( Cam/Crank sensor require external pull-up resistors as the sensor is optically driven.)on these two commands I have to bridge something else but I can not understand what is what I have to give
A pullup resistor is simply a resistor connected between power and a signal line. Nissan 3-wire CKP and CMP sensors are "open collector" types like most, meaning they can pull a wire to ground but cannot source a positive voltage. The original ECM had an internal pullup resistor to supply the positive voltage, but with the sensor standing alone you must supply voltage with an external pullup. Usually 2.2 Kohm 1/4 watt will work fine for 12V applications, or 1 Kohm 1/4 watt for 5V. If you're using an HKS-supplied harness then the sensor supply level should already be correct, but if you're doing your own wiring, it's very important
to determine which voltage level the sensor employed before wiring it or installing a pullup. Powering or pulling-up a 5V sensor up at 12V will usually kill it, and a 12V sensor powered at 5V will usually not operate. In either case, the pullup should connect between the sensor +supply wire and the signal output wire. It can be located anyplace in the circuit, but right at the sensor is usually most convenient place.
https://drive.google.com/file/d/1QLjjXI ... sp=sharing
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