SPL Tech Posted December 26, 2014 Report Share Posted December 26, 2014 (edited) Sensor of some sort on the ground terminal. At first I thought the voltage meter, but I thought the ECU reads the voltage right at the HUD, which is why the HUD displayed voltage is lower than the actual voltage at the battery. Whatever it is, there are two wires on ground, one on +12v and the white box on the ground terminal. Edited December 26, 2014 by SPL Tech Quote Link to comment Share on other sites More sharing options...
SPL Tech Posted December 26, 2014 Author Report Share Posted December 26, 2014 Also, the 12v battery is not sealed as some suggested. There is a vent that leads to a tube that goes outside, just like the 12v battery on the Prius. Quote Link to comment Share on other sites More sharing options...
plus 3 golfer Posted December 26, 2014 Report Share Posted December 26, 2014 Sensor of some sort on the ground terminal. At first I thought the voltage meter, but I thought the ECU reads the voltage right at the HUD, which is why the HUD displayed voltage is lower than the actual voltage at the battery. Whatever it is, there are two wires on ground, one on +12v and the white box on the ground terminal.It's the Battery Monitoring Sensor which monitors the state of charge of the battery and estimates losses in the battery capacity over time. Data is sent to BCM. BCM sends data to the PCM which determines the set point 12 V voltage for charging and sends to DC/DC converter. JAZ 1 Quote Link to comment Share on other sites More sharing options...
drdiesel1 Posted December 26, 2014 Report Share Posted December 26, 2014 Sensor of some sort on the ground terminal. At first I thought the voltage meter, but I thought the ECU reads the voltage right at the HUD, which is why the HUD displayed voltage is lower than the actual voltage at the battery. Whatever it is, there are two wires on ground, one on +12v and the white box on the ground terminal. I find this very odd. In another post you told us you were a service tech, yet you don't even know whatthe BMS is on your own vehicle ?? Quote Link to comment Share on other sites More sharing options...
SPL Tech Posted December 26, 2014 Author Report Share Posted December 26, 2014 (edited) I find this very odd. In another post you told us you were a service tech, yet you don't even know whatthe BMS is on your own vehicle ??I got out of the business over eight years ago. So no, none of the 2005 and older model vehicles I worked on had a BMS on the battery terminal. Edited December 26, 2014 by SPL Tech Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.