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-D2:

D2-D3:

D4-D5:

D6-D7:

Normal Operation
Under normal operation, the solar radiation sensor receives a ground through circuit 676 (PK/OG). A 5-volt reference voltage is supplied to the solar radiation sensor from the EATC module through circuit 476 (BN/YE) (LH) and circuit 468 (BN) (RH).

Possible Causes
- An open in circuit 476 (BN/YE), 468 (BN) or 676 (PK/OG)
- A short to ground in circuit 468 (BN) or 476 (BN/YE)
- Solar radiation sensor
- Electronic automatic temperature control (EATC) module