I'd recommend replacing it. As was previously stated, don't power the head unit up without it. I'm not 100% sure that it's a problem but, from the values in the head unit. the voltage should be greater than 4v. The current voltage 'may' be enough. I don't know because the MCU doesn't give threshold voltages. Unless someone has experience with these, getting the voltage up to about 5v is the next thing to do.
Are there any markings or distinctions I should look for to see if I have the same one? Or just one that fits
No. It must be a 5.1v Zener diode. A 1N4148 wouldn't limit the voltage and that could damage the MCU.
As in power connectors? I have blue wire to ground and accessory turn on is 12.3v
D716 5.77v
R715 is 3.16v
D716 5.77v
R715 is 3.16v
Power 13.3v
D712 3.4v
D716 5.8v
R715 4.07v
R715 -98.3k ohms one way, open circuit the other with the yellow multimeter
Auto-ranging multimeter says open circuit
D712 3.4v
D716 5.8v
R715 4.07v
R715 -98.3k ohms one way, open circuit the other with the yellow multimeter
Auto-ranging multimeter says open circuit
Is that with R715 out of the circuit?
How did you read 46.6k previously?
If you ever get a chance to buy a reasonably priced Fluke multimeter in good working order, buy it.
How did you read 46.6k previously?
If you ever get a chance to buy a reasonably priced Fluke multimeter in good working order, buy it.
R715 still in circuit
My mistake, it reads 46.6k when there is no power
I read the other number with the power on thinking I read 46.6k with it on
I’ll check them out
My mistake, it reads 46.6k when there is no power
I read the other number with the power on thinking I read 46.6k with it on
I’ll check them out
You can't use your multimeter on ohms or diode-check with power applied and even having the part in the circuit can skew readings.
When on ohms or diode-check, the meter drives a small voltage to the probes and the difference in the loaded/unloaded probe voltages tells the meter what to display. Having voltage on the circuit changes the voltage across the probes and therefore the reading.
When on ohms or diode-check, the meter drives a small voltage to the probes and the difference in the loaded/unloaded probe voltages tells the meter what to display. Having voltage on the circuit changes the voltage across the probes and therefore the reading.