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-D2:

D3-D4:

D5-D6:

D6 Continued:

Normal Operation
Under normal operation, the solar radiation sensor receives a ground through circuit 1203 (BK/LB). A 5 volt reference voltage is supplied to the solar radiation sensor from the DATC module through circuit 468 (BN).

Possible Causes
- An open in circuit 1203 (BK/LB) or 468 (BN).
- A short to ground in circuit 468 (BN).
- Solar radiation sensor.
- DATC module.