HybridBatterix
TYF Newbie
- Joined
- Apr 19, 2022
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Hi everyone,
sorry for my english, i'm french.
I have a 2007 Tahoe hybrid with some problems.
I have a good experience on HV Battery, usually, i do diagnostics on Toyota, Lexus, Honda.
In 2019, a dealer of american vehicles near Paris (France) called me for making safe the vehicle because they had to change the gear box.
They changed the gear box, but the problem is always there.
So, i did a diagnostic with Torque (i put the good pids).
And i saw the High Voltage battery is bad.
The dealer decided to stop calling me.
One month ago, the new owner of this Tahoe called me, and he wants to fix the problem.
I dismantled the High Voltage Battery. It's really bad, the ECU near the HV Battery is in short-circuit, there is oxidation, severals pins are blue.
We ordered a new ECU. I checked the harness with voltage taps. I learned to dismantle the pods on an used Toyota harness, in case i need to change the harness too.
I changed the ECU, the 40 modules, the copper plates. I cleaned the fan, i dried it.
I put it all back together.
I tried to start, the ICE doesn't sart.
I looked for the origin of the problem. I found this forum. We check two plugs below the fuse box.
The ICE starts few seconds and stops.
The two DTC code i have are P0C2B and P0AC4.
P0AC4 is juste the engine light on on the dashboard ?
P0AC2B is a bad Feedback Signal of the Auxilliary Transmission Fluid Pump Control Module ?
Someone can confirm ?
I saw there is a Service Bulletin. I found in another thread in this forum.
Thank you very much.
Max
PS : the dealer of american vehicles gave me the GM process to make safe the Tahoe.
On Toyota, to make safe, we have to disconnect the 12V battery before to disconnect the fuse on the orange plug of the HV battery.
But, on the GM vehicles, the process says to remove the orange plug of the HV Battery several minutes to disconnect the 12V.
It's true or it's a bad translation english to french on the process ?
sorry for my english, i'm french.
I have a 2007 Tahoe hybrid with some problems.
I have a good experience on HV Battery, usually, i do diagnostics on Toyota, Lexus, Honda.
In 2019, a dealer of american vehicles near Paris (France) called me for making safe the vehicle because they had to change the gear box.
They changed the gear box, but the problem is always there.
So, i did a diagnostic with Torque (i put the good pids).
And i saw the High Voltage battery is bad.
The dealer decided to stop calling me.
One month ago, the new owner of this Tahoe called me, and he wants to fix the problem.
I dismantled the High Voltage Battery. It's really bad, the ECU near the HV Battery is in short-circuit, there is oxidation, severals pins are blue.
We ordered a new ECU. I checked the harness with voltage taps. I learned to dismantle the pods on an used Toyota harness, in case i need to change the harness too.
I changed the ECU, the 40 modules, the copper plates. I cleaned the fan, i dried it.
I put it all back together.
I tried to start, the ICE doesn't sart.
I looked for the origin of the problem. I found this forum. We check two plugs below the fuse box.
The ICE starts few seconds and stops.
The two DTC code i have are P0C2B and P0AC4.
P0AC4 is juste the engine light on on the dashboard ?
P0AC2B is a bad Feedback Signal of the Auxilliary Transmission Fluid Pump Control Module ?
Someone can confirm ?
I saw there is a Service Bulletin. I found in another thread in this forum.
Thank you very much.
Max
PS : the dealer of american vehicles gave me the GM process to make safe the Tahoe.
On Toyota, to make safe, we have to disconnect the 12V battery before to disconnect the fuse on the orange plug of the HV battery.
But, on the GM vehicles, the process says to remove the orange plug of the HV Battery several minutes to disconnect the 12V.
It's true or it's a bad translation english to french on the process ?