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Tech Talk Technical Discussion About The Nissan 240SX and Nissan Z Cars |
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03-31-2020, 05:57 PM | #1 |
Leaky Injector
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S14/2JZ Speedometer Questions
So I'm at that point in the speedometer project that I'm at a brick wall.
I'm getting no output to the 240sx's speedometer. Parts I have: * Speed sensor in transmission: Trail Gear 301447-1-KIT * gkgoodcheapparts's "UNIVERSAL SPEEDOMETER CORRECTOR CALIBRATOR, 2.5% to 1000%, 2-BUTTON SETUP" speedometer converter. Some Info on the Parts: * Trail Gear 301447-1-KIT Not much information is given on this besides the pinout, I am assuming it is standard with the rest of the Toyota speed sensors. This sensor should be the exact same as the Marlin Crawler one. Pinout: (1) 12v VDC IN (2) Ground (-VDC) (3) Signal Output (+VDC) * gkgoodcheapparts's speedometer corrector/converter 4 pins (1) Output (12v) (2) Input (3) 12v Power (4) Ground * Two buttons, one to up the signal by 0.05, other to down the signal by 0.05. This should be a ratio. Some Information I have found so far: * 240sx is 16,000 PPM AC sinewave signal. * The Toyota VSS (should be) 4,000 PPM Squarewave signal going off of wilbo666's documents. (so I have the converter set to 4.00 to increase it 4 times.) My Wiring * 12v Switched to Sensor 12v Power pin 1 * 12v Switched to Converter 12v Input. * Engine ground going to Sensor Ground pin 2. * Engine ground going to the converter ground. * Sensor Signal pin 3 going to converter input signal. * Converter output going to the Y/B pin #24 on the F3 connector. I get no kind of output to the 240sx's speedometer. The company even said when using a 3-wire sensor, to use a pullup resistor between signal and voltage. I tried that one too, made no difference. The 240sx's wiring diagram shows the original AC speed sensor going to the speeedometer via the E202 connector R/Y and R. Then it has that Y/G wire going to the VSP pin on the ECU. Under that pretense I would imagine Y/G was output only. But seeing other people withe Dakota is using that wire I guess it don't matter. * What I have tried: - Using a volt meter to the speed sensor output I see 12v during idle, and then sometimes it bounces around 5v - 8v while the car is moving. - Tried directly connecting the speed sensor output to the VSP wire. Does anyone have any advice or direction with this? I should of just bought the dakota one. But at this point I don't know if there is something wrong with that Trail Gear sensor either. Thanks. |
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