Test D: DTC B1259 Or DTC B1261 - Solar Radiation Sensor Circuit Open Or Short To Ground
PINPOINT TEST D: DTC B1259 OR DTC B1261 - SOLAR RADIATION SENSOR CIRCUIT OPEN OR SHORT TO GROUNDNormal 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 HVAC module through circuits 476 (BN/YE) (LH) and 468 (BN) (RH).
- DTC B1261 Solar Radiation Sensor Circuit Short To Ground - The module senses excessive voltage drop on the sensor reference voltage circuit, indicating a short directly to ground.
- DTC B1259 Solar Radiation Sensor Circuit Open - The module senses no voltage drop on the sensor reference voltage circuit, indicating an open circuit.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Solar radiation sensor
- HVAC module
D1-D2:
D2-D3:
D4-D5:
