Test D: DTC B1259 or DTC B1261 - Solar Radiation Sensor Open Circuit or Short to Ground

PINPOINT TEST D: DTC B1259 OR DTC B1261 - SOLAR RADIATION SENSOR OPEN CIRCUIT OR SHORT TO GROUND

D1:

D1-D3:

D3-D5:

D6:

Normal Operation
Under normal operation, the solar radiation sensor is grounded through circuit 676 (PK/OG). A 5-volt reference voltage is supplied to the solar radiation sensor from the electronic automatic temperature control (EATC) module through circuit 217

Possible Causes
- An open in circuit 676 (PK/OG) or 217 (DB/OG)
- A short together in circuit 676 (PK/OG) and 217 (DB/OG)
- A short to ground in circuit 217 (DB/OG)
- Solar radiation sensor
- Electronic automatic temperature control (EATC) module