Normal Operation

Under normal operation, the in-vehicle air temperature sensor receives a ground from the HVAC module through circuit RH111 (GY/BU). A 5-volt reference voltage is supplied to the in-vehicle air temperature sensor from the HVAC module through circuit EVH414 (GN/BU).

• DTC B1A61:11 (Cabin Temperature Sensor: Circuit Short to Ground) - The module senses excessive voltage drop on the sensor reference voltage circuit, indicating a short directly to ground.
• DTC B1A61:15 (Cabin Temperature Sensor: Circuit Short to Battery or Open) - The module senses no voltage drop on the sensor reference voltage circuit, indicating a short directly to voltage or an open circuit.

  This pinpoint test is intended to diagnose the following: 

• Wiring, terminals or connectors
• In-vehicle air temperature sensor
• HVAC module