Test B: DTC B2784 Or DTC B2783 - Interior Humidity Sensor To DATC Open Or Short Circuit
PINPOINT TEST B: DTC B2784 OR DTC B2783 - INTERIOR HUMIDITY SENSOR TO DATC OPEN OR SHORT CIRCUITNormal 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 electronic automatic temperature control (EATC) module through circuit LH115 (WH). The EATC module receives the humidity value through circuit VH413 (WH/BU).
- 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
- EATC module
B1-B3:
B3-B5:
B5-B7:
B7-B9:
