When looking at the battery, module number 1 is opposite the end with the computer components. When using the dr Prius app or torque pro, which is identified as module 1? At the computer compartment or opposite side?
Yes, but in greater hybrid world that sometimes can be more confusing than saying module #1 is the first place the batteries negative cable connects to.
AFAIK all scanners and apps - on Gen2 Prius - number the HV battery blocks as 1 (module 1 & 2) being opposite from the ecu and 14 (module 27 & 28) is closest to the ecu. Posted via the PriusChat mobile app.
yes, but each iteration puts components in packs in slightly different locations. For example a rebuilder I know used a method that got negative part of pack at first module backwards in a Prius C, even though it wasn't. So to keep from it getting confusing, it's best to explain #1 module as where negative cable of pack connects.
Luckily, we are discussing Gen 2s in these Gen 2 forums. So it is quite accurate to state it as @mr_guy_mann did.
There's a post over here that shows how you can double-check using the color codes of the voltage-sensing wires (the skinny ones that connect at every second module down the length of the pack). There's been a rule often given that "#1 is where the cable goes on the ⊖ end of the module", but the gen 1 Prius was an exception to that rule. Maybe the rule is right for all the generations after gen 1, but usually as soon as I see one exception to a "rule" I become cautious about it, and just say "eh, I'll double-check for my car". The post I linked doesn't include the diagram with color codes for Prius c, so somebody might have to look that up. Toyota Service Information and Where To Find It | PriusChat One case where the color coding might not be enough would be if there's been previous work on the battery and that voltage-sensing wire harness (or "no. 2 frame wire") was replaced with an aftermarket one; those might not match the factory color codes. In a car where the "connected at ⊖ end is #1" rule holds—remember it doesn't hold for all generations, but in a car where it does—the location that matters is where the cable connects to that module, not wherever the other end of the cable might attach to the relay.
