0x07F0E1, Undervoltage
- recharge battery - check power supply (wire cross section, corrosion of connectors in harnesses and connection terminals) - for further information see workshop manual - clear error memory
What you'll see
No driver-visible symptom recorded.
System reaction
- this DTC is stored in the error memory - heating operation is stopped - failure afterrun is initiated Heater Actions: * This DTC is a warning
Diagnostic depth
Enable Condition: This error is monitored while heater is active. (LS.Internal.HeaterStateSimplified = HeaterBurnerStarting or LS.Internal.HeaterStateSimplified = HeaterBurnerActive or LS.Internal.HeaterStateSimplified = HeaterBurnerStopping or LS.Internal.HeaterStateSimplified = HeaterBurnerNotActive) Mature Threshold: Supply voltage at ECU is fallen below UB_MIN (typical value 20V) for more than UB_MIN_T_DELAY (typical value 10 seconds) seconds. This DTC is reported by the heater core software. De-mature Criteria: Stable combustion reached after restart of heater: Heating request is switched off (HeaterModeRequest = DeactivateHeater) and on (HeaterModeRequest = NormalMode) and state HEATER RUNNING is reached
- discharged battery - voltage dropped during cranking - high resistance of power supply lines - ECU hardware failure