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 GROUNDNormal Operation
Under normal operation, the solar radiation sensor receives a ground through circuit GD145 (BK/BU). A 5-volt reference voltage is supplied to the solar radiation sensor from the HVAC module - electronic automatic temperature control (EATC) through circuit (RH) VH416 (VT/GY) and (LH) VH417 (YE/OG).
- 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
- HVAC module - EATC
D1-D2:
D3-D4:
D5-D6:
