I got my SLC Free 2 and LSU49B0 (from 14point7) a few weeks ago, finally got it hooked up for a basic bench test.
The sensor side of the 6-wire connector has no green going to the unit, with a little plastic tab covering that corner of the connector. I’m guessing the in-plug micro-controller makes use of it, but the sensor itself doesn’t. I just wanted to make sure the hardware is all good.
I saw in a previous thread I shouldn’t expect legit temp readings in well out of range conditions, like my workbench. Somewhat connected to that though: support material indicates the 4.9 should heat itself up to operating range upon startup. Sofar I’m only able to get a viable lambda fluctuation reading after heating up the sensor with a heat gun.
I expect my confusion about bench results is just because I’m using it well outside normal operating conditions, I just wanted to check if anything sounds weird.
I’ll split the heater ground before I install the unit.
Thanks Alan and everyone else, your dedication to this community is inspirational.
Do you mean the cable on the 4.9 sensor or the cable you made? I think all 6 connections are used. Also I think, not sure, but the heater is the center 2 connectors. I can try to take a look at mine tomorrow. I do have a Spartan 3 showing up today with 4.9 Sensors if they show I’ll see if they have all 6 wires from that connector.
Also one thing that got me was I didn’t realize the connector from the board to the sensor was the BACK of the sensor. I flipped the wires, after fixing it, it seems good. Tested with both sensors, and seemed to respond. The heater was working when the other pairs of wires were swapped. Wired the second sensor correctly and compared both sensors with and they were both good on both. When wired incorrectly the temp was erratic but the heater did work, and the only 2 wires that were correct were the center black and white which are the same.
Just got my package from 14point7 and you are right the Bosch 4.9 Sensor only has 5 wires. So it may be something else on your wiring that is causing an issue.
It should heatup on the bench. Heatup takes about ~2 minutes.
Does the sensor get warm/hot on the bench?
There are 6 contacts on the sensor connector and 5 wires leading to the head of the sensor. The 6th contact is connected to a calibration resistor inside the connector housing. All 6 contacts must be connected to SLC Free 2.