Rivian EV
Rivian battery CAN and platform CAN dropping out, traced to the dash harness
By Sebastian Rivera
The short answer
Battery CAN and platform CAN on this Rivian were both dropping out because of a fault in the dash harness. Gently moving the harnesses at E008 with the scope on both networks reproduced the dropout every time, with CAN high and CAN low pulled to ground.
- Networks dropping out
- 2
- Harness at fault
- 1
- Vehicle
- Rivian EV
- Symptom
- Battery CAN and platform CAN dropping out
How it was found
- Put the oscilloscope on both networks at the same time.
- Gently moved the harnesses at E008 while watching both captures.
- Every time, both networks dropped out, with CAN high and CAN low pulled down to ground.
- That pointed to a shared harness, the dash harness.
Root cause
A fault in the dash harness pulling both networks to ground.
The fix
Replace the dash harness, clear the codes and retest.
What this means for your team
When 2 networks drop out together, look for what they share. Reproducing the fault on the scope while moving the harness turns an intermittent problem into proof.