Test D: DTC B2826 or DTC B2827 - Evaporator Temperature Sensor Circuit Failure or Short to Ground
PINPOINT TEST D: DTC B2826 OR DTC B2827 - EVAPORATOR TEMPERATURE SENSOR CIRCUIT FAILURE OR SHORT TO GROUNDD1-D3:
D4-D5:
D6-D7:
Normal Operation
Under normal operation, the evaporator discharge air temperature sensor receives a ground from the electronic automatic temperature control (DATC) module through circuit RH104 (BU/BN). A 5-volt reference voltage is supplied to the evaporator discharge air temperature sensor from the DATC module through circuit VH406 (VT/BN).
Possible Causes
- An open in circuit RH104 (BU/BN) or VH406 (VT/BN)
- A short to ground in circuit VH406 (VT/BN)
- An short together in circuit RH104 (BU/BN) and VH406 (VT/BN)
- Evaporator discharge air temperature sensor
- DATC module