BMS_w150 — SW precharge too long

Full alert identifier: BMS_w150_SW_precharge_too_long

Message shown in the car

Vehicle may not restart Service is required

Alert description

The battery management system (BMS) detects that it is taking too long to reach the target precharge voltage and prevents packs contactors from closing. This indicates that the voltage on the DC link bus rose more slowly than expected.

Potential impact

Inability to charge, drive, or support the low voltage (LV) system

Set condition

The BMS detects that the voltage on the DC link bus is rising slower than it should be. Alert log signal data provides information on the specific condition(s) detected.

Clear condition

The BMS detects that the condition clears.

Signals to check

Open this alert in Service Mode Plus and review the Payload tab. Use the field names below to identify the values shown by your vehicle.

Signal	Unit
Coil Current `BMS_a150_coilCurrent` 255 SNA	A
Dc Link V `BMS_a150_dcLinkV` 65535 SNA	V
Hvil V `BMS_a150_hvilV`	V
Precharge Current `BMS_a150_prechargeCurrent`	A

Signal	Unit
Ctr Set Failed `BMS_a150_ctrSetFailed` 0 CTR DR 1 CTR ANC 2 CTR FC 3 SNA	—
Err Type `BMS_a150_errType` 0 DC LINK TOO HIGH 1 TOO FAST 2 TOO SLOW 3 TIMEOUT 4 RESISTOR TOO HOT 5 LOAD TURNED ON EARLY 6 PRECHG RELAY FAIL 7 NOT OK TO PRECHARGE	—

Check other alerts

With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of BMS_w150.