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Re: Failed High Voltage Battery

Posted: Mon Nov 22, 2021 9:07 pm
by Anti_Climax
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.

Re: Failed High Voltage Battery

Posted: Wed Nov 24, 2021 8:32 am
by BamaEV
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.

Re: Failed High Voltage Battery

Posted: Wed Nov 24, 2021 7:08 pm
by Heima
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

Re: Failed High Voltage Battery

Posted: Fri Nov 26, 2021 11:34 am
by BamaEV
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

Re: Failed High Voltage Battery

Posted: Sat Nov 27, 2021 12:24 am
by Heima
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.

Re: Failed High Voltage Battery

Posted: Sat Nov 27, 2021 6:50 pm
by Anti_Climax
@bamaev, pm me and I can try to help you run your diagnostics.

Re: Failed High Voltage Battery

Posted: Sun Nov 28, 2021 2:25 pm
by BamaEV
@anti_climax, I tried to PM, but the messages seem stuck in my outbox.

Re: Failed High Voltage Battery

Posted: Sun Nov 28, 2021 4:26 pm
by BamaEV
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===