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92 Posts
Hi all.
Well my trusty 2001 MT that I love to brag about because I never have to fix anything...has been giving me headaches.
I put in a ticket with Hybrid Automotive because recently when connecting their automatic discharger, the voltage read zero and it would not start the discharge sequence, obviously. A couple days later, the car set a P1444 code. I did some reading and decided to probe for the voltage leak to the chassis. Indeed, I found current between the HV battery and the chassis. Quickly the multimeter would ramp up to 50v then taper slowly down to about 1v over the course of 10 seconds or so when reading across the positive terminal and chassis. The voltage seemed to build back up with the leads removed, as the voltage would be higher with increased time between re-reading the voltage. The result was similar between both positive and negative HV terminals.
What I did NOT expect was ZERO voltage across both HV terminals. I had the breaker off, so I flipped it on real quick to check again and indeed zero voltage. This explains why the discharger is reading zero, I think. However, with the HA grid charger connected, it reads 181v. Strange. Also, it reads zero mA, assuming because it cannot charge due to whatever the problems is/are.
I inspected the grid charger wiring as a couple threads suggested and saw no evidence of abrasion but also didn’t put the meter to it.
Neither the charger or discharger were connected when driving and the code was set.
I read a lot of P1444 threads and most seemed to go down different rabbit holes and none had these symptoms. I don’t have a shady shop or garage to leave the car in for days so I’m looking for some guidance or even elimination procedure before ripping the battery out to get at the sticks. As usual, any help is appreciated!
Well my trusty 2001 MT that I love to brag about because I never have to fix anything...has been giving me headaches.
I put in a ticket with Hybrid Automotive because recently when connecting their automatic discharger, the voltage read zero and it would not start the discharge sequence, obviously. A couple days later, the car set a P1444 code. I did some reading and decided to probe for the voltage leak to the chassis. Indeed, I found current between the HV battery and the chassis. Quickly the multimeter would ramp up to 50v then taper slowly down to about 1v over the course of 10 seconds or so when reading across the positive terminal and chassis. The voltage seemed to build back up with the leads removed, as the voltage would be higher with increased time between re-reading the voltage. The result was similar between both positive and negative HV terminals.
What I did NOT expect was ZERO voltage across both HV terminals. I had the breaker off, so I flipped it on real quick to check again and indeed zero voltage. This explains why the discharger is reading zero, I think. However, with the HA grid charger connected, it reads 181v. Strange. Also, it reads zero mA, assuming because it cannot charge due to whatever the problems is/are.
I inspected the grid charger wiring as a couple threads suggested and saw no evidence of abrasion but also didn’t put the meter to it.
Neither the charger or discharger were connected when driving and the code was set.
I read a lot of P1444 threads and most seemed to go down different rabbit holes and none had these symptoms. I don’t have a shady shop or garage to leave the car in for days so I’m looking for some guidance or even elimination procedure before ripping the battery out to get at the sticks. As usual, any help is appreciated!