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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> Body & Frame >> Seats >> Seat Heater System - Diagnostic Codes & Symptom Tests >> Seat Heater System >> DTC B14C3-11: Rear Left Seat Heat Sensor Circuit Short to Ground; DTC B14C3-15: Rear Left Seat Heat Sensor Circuit Short to Battery or Open [11/2023 - ] >> Description

DTC B14C3-11: Rear Left Seat Heat Sensor Circuit Short to Ground; DTC B14C3-15: Rear Left Seat Heat Sensor Circuit Short to Battery or Open [11/2023 - ]: Description

Power supply to the temperature sensor built into the rear seat cushion heater stops if one of the following occurs: 1) an open or short occurs in the temperature sensor circuit; or 2) the temperature sensor is damaged and its output value does not change.

DTC No. Detection Item DTC Detection Condition Trouble Area DTC Output from Priority
B14C3-11 Rear Left Seat Heat Sensor Circuit Short to Ground A short to ground in the temperature sensor circuit of the rear left seat heater occurs for 4 seconds or more.
  • Rear seat cushion heater LH (seat heater assembly)
  • Air conditioning amplifier assembly
  • Harness or connector
Air Conditioner A
B14C3-15 Rear Left Seat Heat Sensor Circuit Short to Battery or Open A short to +B or open in the temperature sensor circuit of the rear left seat heater occurs for 4 seconds or more.
  • Rear seat cushion heater LH (seat heater assembly)
  • Air conditioning amplifier assembly
  • Harness or connector
Air Conditioner A