Test D: DTC B1259 Or B1261 - Solar Radiation Sensor Circuit Open Or Short To Ground
PINPOINT TEST D: DTC B1259 OR 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 electronic automatic temperature control (EATC) module through circuit 476 (BN/YE).
- DTC B1259 Solar Radiation Sensor Circuit Open - The module senses no voltage drop on the sensor reference voltage circuit, indicating an open circuit.
- 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.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Solar radiation sensor
- EATC module
D1:
D1-D3:
D3-D5:
