Anti_Climax
Posts: 312
Joined: Fri May 20, 2016 12:22 pm
Location: The Valley of the Sun

Re: Failed High Voltage Battery

Mon Nov 22, 2021 9:07 pm

What's the actual fault code it posts? SOBDM is the module name for the charger.

There's not much between the port and the charger, depending on the actual fault you might be able to fix the existing part.
2012 Candy Blue FFE
33.5kWh battery pack
CHAdeMO DC Fast Charging

BamaEV
Posts: 17
Joined: Mon Nov 22, 2021 4:41 pm

Re: Failed High Voltage Battery

Wed Nov 24, 2021 8:32 am

They didn't give me any other fault code. If that is the part number, it seems to confirm to me that the local dealer here in Atlanta doesn't really know what they are doing. I've ordered a FORscan device so I can, hopefully, read the fault codes myself. It should arrive on Friday. I will let you know the code once I get the Forscan.

Heima
Posts: 229
Joined: Thu Feb 21, 2019 11:46 pm

Re: Failed High Voltage Battery

Wed Nov 24, 2021 7:08 pm

Until you get the interface and Forscan, you can use Engineering test mode to read some fault codes.
See viewtopic.php?f=7&t=4991

BamaEV
Posts: 17
Joined: Mon Nov 22, 2021 4:41 pm

Re: Failed High Voltage Battery

Fri Nov 26, 2021 11:34 am

So I was finally able to read the fault codes. I didn't get any of this info from the local dealer, which again suggests that they don't know how to deal with these cars. Here is the info from Forscan. I already tried resetting the SOBDM. That didn't work. Any other suggestions?



Code: U3000 - Control Module

Additional Fault Symptom:
- System Internal Failures

Status:
- DTC Present at Time of Request
- Malfunction Indicator Lamp is On for this DTC

Module: Secondary OBD Control Module A

Freeze Frame :
-REAL_TIME: 264771509 s - Global real time
-TOTAL_DIST: 110053.0 km - Total Distance
-MAIN_BCCM_VOLT: 12.00 V - Main ECU voltage supply
-EXTERIOR_TEMP: 20 °C - Outside temperature
-SOBDM_BECM_PSR: PSR On - SOBDM to BECM Wakeup Status
-PCM_SOBDM_PSR: PSR On - PCM to SOBDM Wakeup Status
-PWR_MODE_QF: Power Mode Undefined - Power Mode Quality Factor
-PWR_MODE_KEY: Key Out - Power Mode Key State
-INT_FAULT_CODE: 32 - Internal Fault Code

Heima
Posts: 229
Joined: Thu Feb 21, 2019 11:46 pm

Re: Failed High Voltage Battery

Sat Nov 27, 2021 12:24 am

In the service manual, it says this for that code:

"U3000:04 Control Module: System Internal Failure INSTALL a new SOBDM .
REFER to: Secondary On-Board Diagnostic Control Module A (SOBDM) (414-03B High Voltage Battery Charging System, Removal and Installation)."

But it also says this:

"U3000:41 Control Module: General Checksum Failure CLEAR the DTC . REPEAT the self-test. If the DTC is still present, INSTALL a new GFM .
REFER to: Generic Function Module (GFM) (414-03B High Voltage Battery Charging System, Removal and Installation)."

So the SOBDM is the charger, the GFM is the module that deals with the lights and logic on the charge port.

You could use Forscan to reset and selftest the modules. I would think the GFM to be a much cheaper replacement part than the SOBDM. It could be a bad connection, or it might be a blown fuse inside of the SOBDM.

Anti_Climax
Posts: 312
Joined: Fri May 20, 2016 12:22 pm
Location: The Valley of the Sun

Re: Failed High Voltage Battery

Sat Nov 27, 2021 6:50 pm

@bamaev, pm me and I can try to help you run your diagnostics.
2012 Candy Blue FFE
33.5kWh battery pack
CHAdeMO DC Fast Charging

BamaEV
Posts: 17
Joined: Mon Nov 22, 2021 4:41 pm

Re: Failed High Voltage Battery

Sun Nov 28, 2021 2:25 pm

@anti_climax, I tried to PM, but the messages seem stuck in my outbox.

BamaEV
Posts: 17
Joined: Mon Nov 22, 2021 4:41 pm

Re: Failed High Voltage Battery

Sun Nov 28, 2021 4:26 pm

So I got the full diagnostic code. It seems like I might need a new SOBDM. If I understand correctly, replacing the SOBDM requires discharging and recharging the liquid cooling system, so probably not something I can DIY.


Here is the Forscan info:

===SOBDM DTC U3000:04-28===
Code: U3000 - Control Module

Additional Fault Symptom:
- System Internal Failures

Status:
- Previously Set DTC - Not Present at Time of Request
- Malfunction Indicator Lamp is Off for this DTC

Module: Secondary OBD Control Module A

Freeze Frame :
-REAL_TIME: 265113883 s - Global real time
-TOTAL_DIST: 110060.0 km - Total Distance
-MAIN_BCCM_VOLT: 14.50 V - Main ECU voltage supply
-EXTERIOR_TEMP: 11 °C - Outside temperature
-MAIN_DCDC_STAT: DCDC On - Main DCDC Status
-SOBDM_BECM_PSR: PSR On - SOBDM to BECM Wakeup Status
-PCM_SOBDM_PSR: PSR On - PCM to SOBDM Wakeup Status
-PWR_MODE_QF: Power Mode Undefined - Power Mode Quality Factor
-PWR_MODE_KEY: Key Out - Power Mode Key State
-INT_FAULT_CODE: 32 - Internal Fault Code
===END SOBDM DTC U3000:04-28===

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