Remote start not working

[ITLists]

I have not been able to isolate the specific voltage threshold. If possible, pop the hood when you park it so you don't have to "wake it up" opening the door before you test.

I would check the voltage while it's on and right after shutting off, so you can know how much it's down if/when it fails.

With a battery tender attached, the battery voltage when off was 13.1. Dropped to 12.8 when I attempted remote start; this time the remote start failed immediately and didn't start at all. The battery tender is charging the battery right now. Will see how that goes.

Battery tender shows FULL (presumably somewhere in the high 13s or 14V). Tried remote start again, same thing - immediate fail with a horn beep. Doesn't even start for a few seconds like before. After a few attempts, hooked up the tender again and it read 12.5v. Charging back up once again.

Seems strange to me...

[moquiti]

Is there the capability to reset the BMS, and perhaps resolve issues with the remote not functioning as expected?

[ITLists]

Is there the capability to reset the BMS, and perhaps resolve issues with the remote not functioning as expected?

How is the reset performed? Master Reset in Sync?

[Anti_Climax]

Master reset in sync is only for the infotainment. If it was only a problem trying to remote start through the app, that might be a thing to try, but it has nothing to do with BMS or the fob remote start.

Looks like there is a process for resetting it without OBD, but I can't vouch for it. I will note that after getting my battery replaced to try and stop this problem during the summer heat, the reset didn't have and noticeable effect.

https://youtu.be/BiBBDnTUcIY

[ITLists]

Master reset in sync is only for the infotainment. If it was only a problem trying to remote start through the app, that might be a thing to try, but it has nothing to do with BMS or the fob remote start.

Looks like there is a process for resetting it without OBD, but I can't vouch for it. I will note that after getting my battery replaced to try and stop this problem during the summer heat, the reset didn't have and noticeable effect.

Thanks.
The non-OBD2 methods didn't work so I reset it using FORscan. Got success message but unfortunately the remote start still fails after few seconds.
Looks like it'll be a trip to the dealer.

Appreciate everyone's help on this!

[mdfocus]

If a different batter is used with a different cc amp capacity the car will need to be reprogrammed for it.

[ITLists]

If a different batter is used with a different cc amp capacity the car will need to be reprogrammed for it.

I see. Can that be done easily via FORscan?

[Anti_Climax]

Keep in mind that these won't necessarily fix it, so don't get your hopes up.

Mine happens with the manufacturer specified battery even after a BMS reset.

[ITLists]

Keep in mind that these won't necessarily fix it, so don't get your hopes up.

Mine happens with the manufacturer specified battery even after a BMS reset.

Fair enough... worth a try though. Do you know how to set battery parameters through FORscan? I'll search online too...

[ITLists]

Below are two DTCs pulled from FORscan.

This one pops up when attempting remote start:

Code: Select all

===BdyCM DTC P1594:04-28===
Code: P1594 - Forced Engine Shutdown - Remote Start System Fault, No Unattended Vehicle Timeout

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: Body Control Module

 Freeze Frame  #1:
-EVENT_TIME: 171327099 s (Sun Jan 22 14:46:28 2023) - Event time
-TOTAL_DISTANCE: 85056 km - Total Distance
-MODULE_VOLTAGE: 13.0 V - Control Module Voltage
-INCAR_TEMPERATURE: 18 °C - In car temperature
-PWR_MODE_QF: Power Mode OK  - Power Mode Quality Factor
-PWR_MODE_KEY: Key Recently Out  - Power Mode Key State
-DTC U3003:16 set - Battery Voltage Low: FALSE  - DTC U3003:16 set - Battery Voltage Low
-DTC U0515:00 set - Invalid data from RFA: FALSE  - DTC U0515:00 set - Invalid data from RFA
-DTC U0293:00 set - Lost com w/ PCM/SOBDMC: FALSE  - DTC U0293:00 set - Lost com w/ PCM/SOBDMC
-DTC U0155:00 set - Lost com w/ IPC: FALSE  - DTC U0155:00 set - Lost com w/ IPC
-DTC U0101:00 set - Lost com w/ TCM: FALSE  - DTC U0101:00 set - Lost com w/ TCM
-DTC U0100:00 set - Lost com w/ PCM: FALSE  - DTC U0100:00 set - Lost com w/ PCM
-CRASH_FLAG: FALSE  - CRASH_FLAG
-ALRM_MODE_ACT: FALSE  - ALRM_MODE_ACT
-DTC U3003:17 set - Battery Voltage High: FALSE  - DTC U3003:17 set - Battery Voltage High
-DTC U0101:00 set - Lost com w/ BEV TCM: FALSE  - DTC U0101:00 set - Lost com w/ BEV TCM
-EngAout_N_Actl reach Rstart max speed: FALSE  - EngAout_N_Actl reach Rstart max speed
-Engine Speed QF not ok: FALSE  - Engine Speed QF not ok
-HOOD_OPEN: FALSE  - HOOD_OPEN
-PATS System error: FALSE  - PATS System error
-PATS malfunction - PCM/BCM Com error: FALSE  - PATS malfunction - PCM/BCM Com error
-PWR_SYS_STAT: TRUE  - PWR_SYS_STAT
-Rem Start disabled - BCM/IPC com error: FALSE  - Rem Start disabled - BCM/IPC com error
-PATS target ID not stored: FALSE  - PATS target ID not stored
-Vehicle Speed not zero or bad ABS data: FALSE  - Vehicle Speed not zero or bad ABS data
-Bad speed signal from ABS - ABS failure: FALSE  - Bad speed signal from ABS - ABS failure
===END BdyCM DTC P1594:04-28===

This one is most likely the root cause?

Code: Select all

===BdyCM DTC U1007:00-2F===
Code: U1007 - Lost Communication With Battery Monitoring Sensor 'A'

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

Module: Body Control Module

 Freeze Frame  #1:
-EVENT_TIME: 171326993 s (Sun Jan 22 14:44:42 2023) - Event time
-TOTAL_DISTANCE: 85056 km - Total Distance
-MODULE_VOLTAGE: 13.3 V - Control Module Voltage
-INCAR_TEMPERATURE: 19 °C - In car temperature
-PWR_MODE_QF: Power Mode OK  - Power Mode Quality Factor
-PWR_MODE_KEY: Ignition On  - Power Mode Key State
===END BdyCM DTC U1007:00-2F===