Test D: DTC B2784 Or DTC B2783 - A/C Humidity Sensor Open Circuit Or Short To Ground
PINPOINT TEST D: DTC B2784 OR DTC B2783 - A/C HUMIDITY SENSOR OPEN CIRCUIT OR SHORT TO GROUNDNormal Operation
Under normal operation, the A/C humidity sensor is grounded through circuit RH111 (GY/BU). A 5-volt reference voltage is supplied to the A/C humidity sensor from the HVAC module - dual automatic temperature control (DATC) through circuit VH413 (WH/BU). The HVAC module - DATC receives the humidity value through circuit LH115 (WH).
- DTC B2784 Interior Humidity Sensor to DATC Open Circuit - The module senses no voltage drop on the sensor reference voltage circuit, indicating an open circuit.
- DTC B2783 Interior Humidity Sensor to DATC Short Circuit - 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
- A/C humidity sensor
- HVAC module - DATC
D1-D3:
D3-D5:
D5-D7:
D7-D9:
