![]() Beyond completing an OBD-II scan, a bad or failing evaporator temperature switch will produce a few symptoms that can alert the driver of a potential issue that should be serviced. The OBD-II code (P-0535) indicates that an Evaporator Temperature Sensor failure has occurred. The best way of determining that this component is malfunctioning will be to complete an error code download with a scanner. In many cases, when the AC stops blowing hot or cold air, it's due to a malfunction of the EVAP temperature sensor. Most air conditioning problems are related to a sensor or electrical issue especially in modern vehicles. Part 1 of 3: Determining the symptoms of a bad EVAP temperature sensor Note: Since dash removal is extremely complex and specific to each vehicle make and model, all mechanics should refer to the vehicle's service manual for specific instructions on removing the dashboard.However, the job itself of replacing the sensor is incredibly simple (once the dashboard has been removed).Common vehicles that experience failure of this component frequently include the Ford Focus from 2003 to 2008 however, it can fail on any vehicle over a period of time. Since it's very difficult to reach, this job is typically completed by ASE certified mechanics or larger repair shops with extensive resources at their disposal. When the switch fails or has issues, it hinders the performance of the AC system and even causes it to malfunction. It reduces flow when it detects that the evaporator is cold to conserve power and prevent it from freezing over. If the sensor detects that the temperature is approaching high temperatures, the AC system increases flow through the system to increase cooling. This location makes it very time consuming for a mechanic to reach as it will require the removal of most of the dashboard. The AC evaporator is typically located behind the firewall of the engine compartment, tucked in tightly behind the dashboard as well. Typically this component is installed directly on the AC evaporator, as it accomplishes its job by monitoring the temperature found in this component. This component has a very simple job: simply monitoring the temperature of the inside of the vehicle and relaying this information to the vehicle's ECM, which tells the AC to continue flowing cool or warm air in the heater to achieve a desired temperature setting. The operation of this luxury feature is controlled by a very small sensor called the evaporator temperature sensor or EVAP temperature switch. Often, this feature is available on both passenger and driver sides. Firmware versions 4.On many of today's cars, the driver has the luxury of setting a desired temperature inside the vehicle through the air conditioning control panel. ![]() ![]() The label for each option is specified in the order of rotations for that orientation. NOTE: For internal compasses, AHRS_ORIENT is used. For southern hemisphere, switch increase and decrease. Rolling the vehicle upside down should decrease the MagZ value. When set correctly in the northern hemisphere, pointing the nose and right side down should increase the MagX and MagY values respectively. This value will be ignored unless this compass is set as an external compass. The orientation of the first external compass relative to the vehicle frame. Later versions provide two general custom rotations which can be used, Custom 1 and Custom 2, with CUST_ROT1_ROLL/PIT/YAW or CUST_ROT2_ROLL/PIT/YAW angles.īTN_FUNC1: Button Pin 1 RC Channel function ¶Īuxiliary RC Options function executed on pin changeīTN_FUNC2: Button Pin 2 RC Channel function ¶īTN_FUNC3: Button Pin 3 RC Channel function ¶īTN_FUNC4: Button Pin 4 RC Channel function ¶ Firmware versions 4.2 and prior can use a CUSTOM (100) rotation to set the AHRS_CUSTOM_ROLL/PIT/YAW angles for AHRS orientation. After changing you will need to re-level your vehicle. This rotates the IMU and compass readings to allow the board to be oriented in your vehicle at any 90 or 45 degree angle. Overall board orientation relative to the standard orientation for the board type. Note: This parameter is for advanced users
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