VCTRAILER_a202 — Hsd Stuck On

Full alert identifier: VCTRAILER_a202_hsdStuckOn

Alert description

The trailer controller (VCTRAILER) detected a positive measured trailer brake current even when commanded duty cycle was 0%, possibly indicating the high side switch is stuck on

Potential impact

Trailer brakes may be inoperative

Set condition

Measured current over threshold while in drive power state

Clear condition

Toggle Trailer Mode OFF and ON

Signals to check

These diagnostic fields are associated with VCTRAILER_a202. Check the alert's Alert Log in Service Mode Plus for available values.

Signal	Unit
Brake Current `VCTRAILER_a202_brakeCurrent`	A
Brake Voltage `VCTRAILER_a202_brakeVoltage`	V
Stc Voltage `VCTRAILER_a202_stcVoltage`	V

Check other alerts

With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of VCTRAILER_a202.

VCTRAILER_a204 — Stc Stuck On VCTRAILER_a204_stcStuckOn The vehicle trailer controller (VCTRAILER) detected current flowing through the Switched-Tank Converter (STC), in either the forward or backward direction, when VCTRAILER expected the STC to be powered off
VCTRAILER_a484 — Undervoltage Self Test Stuck On VCTRAILER_a484_undervoltageSelfTestStuckOn One or more loads did not turn off during the VCTRAILER Undervoltage self-test.
VCTRAILER_a483 — Undervoltage Self Test Stuck On Debug VCTRAILER_a483_undervoltageSelfTestStuckOnDebug The Trailer Domain Undervoltage self-test did not pass, as a condition affecting a load on the Trailer Domain was detected during the self-test.
VCTRAILER_a201 — Hsd Test Failed VCTRAILER_a201_hsdTestFailed The vehicle trailer controller (VCTRAILER) ran a High Side Field-Effect Transistor (FET) functional test, but the voltage feedback was below the necessary threshold to confirm High Side FET functionality.
VCTRAILER_a415 — Undervoltage Self Test Stuck Off VCTRAILER_a415_undervoltageSelfTestStuckOff One or more loads failed to turn on during the VCTRAILER Undervoltage Self-Test. Those loads will be inhibited from use in drive.

Browse all VCTRAILER alert codes