B2950

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PINPOINT TEST 17: DTC B2950 - AIR CONDITIONING SYSTEM FAULT, DTC P0535 - A/C EVAPORATOR TEMPERATURE SENSOR CIRCUIT FAILURE - HYBRID

Normal Operation

When the high voltage traction battery (HVTB) compartment approaches its upper temperature limit, the traction battery control module (TBCM) requests battery cooling from the PCM. The PCM returns a signal to the TBCM allowing battery cooling under the correct conditions. The TBCM then monitors the auxiliary evaporator for a temperature drop.The TBCM sends a voltage signal through circuit (G/W) to the auxiliary evaporator thermistor. The signal is returned from the auxiliary evaporator thermistor through circuit (GY/Y) to the TBCM.

- DTC B2950 (Air Conditioning System Fault) - The refrigerant distribution valve temperature has not been reduced by more than 2°C (4°F) since the valve is opened.
- DTC P0535 (A/C Evaporator Temperature Sensor Circuit Failure) - The thermal expansion valve (TXV) temperature is less than -40°C (-40°F) or greater than 119°C (246°F).

Possible Causes
- Wiring, terminals or connectors
- Base A/C system
- Auxiliary evaporator thermistor
- TBCM

Diagnostic Procedure

Step 1-Step 4:

Step 5-Step 9: