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VM1000 troubleshooting

mratzburg

Member
I have one of the early Vision Microsystems units and just replaced the battery. That's working.

However, my oil pressure reading has been acting up.

When I turn the system on my oil pressure will often read 70psi, with the engine shut off. I performed the checks in the JPI troubleshooting guide - wiring is good, the voltages at the sensor check out. It reads 70psi even with the wiring disconnected from the DPU.

When I start the engine I generally get psi readings, but they seem low.

For those of you whose VM1000 is working properly, does the pressure read 0psi, even with the sensor disconnected? I am wondering if I need to replace the analog to digital chips as mentioned by johnp19 in another thread or if there is a problem with the sensor.
 
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