Scheme 209
![Scheme 209: ACTUATOR CHECK [12/2013 - ]](https://i.diagnostdata.com/repair/dd/dd67e8fb7119e8a573daf109121b587fa212dc947ab34cd6727aed16134a9e5d.webp)
Scheme 210
Scheme 211
- ACTUATOR CHECK Start the engine and warm it up. Perform the indicator check. Refer to «DIAGNOSIS SYSTEM [12/2013 - ]»(ref-612244-S03624641682014042900000) . HINT: After the indicator check is completed the system enter the DTC check mode automatically. Press the "A/C" switch to cancel the check mode. Push the "DEF" switch to perform the actuator check. HINT: Be sure to perform the actuator check after starting the engine. As the actuator check is repeated from steps 1 to 8 at 1 second intervals, check the temperature and air flow visually and by hand. TEXT IN ILLUSTRATION *1 Display Code HINT: The display blinks at 1 second intervals in the step operation. Push the "OFF" switch to finish panel diagnosis. Push the "AUTO" switch to enter the sensor check mode. Step No. Display Code Conditions Blower Level Air Mix Damper Airflow Vent Air Inlet Damper Compressor 1 81 L0 0% open FACE FRESH OFF 2 82 L0 0% open FACE RECIRCULATION / FRESH ON 3 83 M1 0% open FACE RECIRCULATION / FRESH ON 4 84 M1 50% open B/L FRESH ON 5 85 M1 50% open FOOT FRESH ON 6 86 M3 100% open FOOT FRESH ON 7 87 M3 100% open F/D FRESH ON 8 88 Hi 100% open DEF FRESH ON If the steps are difficult to read because they change automatically, push the "A/C" switch to display the steps one at a time so that they can be read easily. The items are displayed step by step each time the "A/C" switch is pushed. HINT: Push the "OFF" switch to finish panel diagnosis. Push the "AUTO" switch to enter the sensor check mode.
DESCRIPTION
The cooler (room temp. sensor) thermistor is installed in the instrument panel to detect the cabin temperature which is used to control the heater and air conditioning system AUTO mode. The resistance of the cooler (room temp. sensor) thermistor changes in accordance with the cabin temperature. As the temperature decreases, the resistance increases. As the temperature increases, the resistance decreases.
The air conditioning control assembly applies a voltage (5 V) to the cooler (room temp. sensor) thermistor and reads voltage changes due to changes in the resistance of the cooler (room temp. sensor) thermistor.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B1430/21 | Open in room temperature sensor circuit | Cooler (room temp. sensor) thermistor Harness or connector between cooler (room temp. sensor) thermistor and air conditioning control assembly Air conditioning control assembly |
| B1431/-21 | Short in room temperature sensor circuit | Cooler (room temp. sensor) thermistor Harness or connector between cooler (room temp. sensor) thermistor and air conditioning control assembly Air conditioning control assembly |
Scheme 212
The thermistor assembly is installed in the front part of the condenser to detect the ambient temperature and control the air conditioner. The thermistor assembly is connected to the combination meter assembly and detects fluctuations in the ambient temperature. This data is used for controlling the room temperature. The thermistor assembly sends a signal to the air conditioning control assembly via the combination meter assembly. The resistance of the thermistor assembly changes in accordance with the ambient temperature. As the temperature decreases, the resistance increases. As the temperature increases, the resistance decreases.
The combination meter assembly applies a voltage (5 V) to the thermistor assembly and reads voltage changes as changes in the resistance of the thermistor assembly. The combination meter assembly sends the read signal to the air conditioning control assembly via CAN communication.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B1432/22 | Open in ambient temperature sensor circuit | Ambient temperature sensor (thermistor assembly) Harness or connector between ambient temperature sensor (thermistor assembly) and air conditioning control assembly Air conditioning control assembly |
| B1433/-22 | Short in ambient temperature Sensor circuit | Ambient temperature sensor (thermistor assembly) Harness or connector between ambient temperature sensor (thermistor assembly) and air conditioning control assembly Air conditioning control assembly |
Scheme 213
The evaporator temperature sensor (No. 1 cooler thermistor) is installed on the No. 1 cooler evaporator sub-assembly in the air conditioner unit to detect the temperature of the air that has passed through the No. 1 cooler evaporator sub-assembly and is used to control the air conditioning. It sends signals to the air conditioning control assembly. The resistance of the evaporator temperature sensor (No. 1 cooler thermistor) changes in accordance with the cooled air temperature that has passed through the No. 1 cooler evaporator sub-assembly. As the temperature decreases, the resistance increases. As the temperature increases, the resistance decreases.
The air conditioning control assembly applies voltage (5 V) to the evaporator temperature sensor (No. 1 cooler thermistor) and reads voltage changes as the resistance of the evaporator temperature sensor (No. 1 cooler thermistor) changes. This sensor is used for frost prevention.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B1434/23 | Open in evaporator sensor circuit | Evaporator temperature sensor (No. 1 cooler thermistor) Harness or connector between evaporator temperature sensor (No. 1 cooler thermistor) and air conditioning control assembly Air conditioning control assembly |
| B1435/-23 | Short in evaporator sensor circuit | Evaporator temperature sensor (No. 1 cooler thermistor) Harness or connector between evaporator temperature sensor (No. 1 cooler thermistor) and air conditioning control assembly Air conditioning control assembly |
Scheme 214
This sensor detects the position of the air mix damper and sends appropriate signals to the A/C amplifier assembly. The position sensor is built into the air mix control servo motor. This adjusts the amount of air passing through the heater core after passing the No. 1 cooler evaporator sub-assembly and controls the temperature of the output air.
HINT
Confirm that no mechanical problem is present because this diagnostic code can be output when either a damper link or the damper is mechanically locked.
Scheme 215
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B1436/45 | Open in passenger side air mix damper position sensor circuit | No. 4 air conditioning radiator damper servo sub-assembly (air mix (for front passenger side)) Harness or connector between No. 4 air conditioning radiator damper servo sub-assembly (air mix (for front passenger side)) and air conditioning control assembly. Air conditioning control assembly |
| B1437/-45 | Short in passenger side air mix damper position sensor circuit | No. 4 air conditioning radiator damper servo sub-assembly (air mix (for front passenger side)) Harness or connector between No. 4 air conditioning radiator damper servo sub-assembly (air mix (for front passenger side)) and air conditioning control assembly. Air conditioning control assembly |
| B1441/E45 | Passenger side air mix damper control servomotor circuit | No. 4 air conditioning radiator damper servo sub-assembly (air mix (for front passenger side)) Harness or connector between No. 4 air conditioning radiator damper servo sub-assembly (air mix (for front passenger side)) and air conditioning control assembly. Air conditioning control assembly |
Scheme 216
This sensor detects the position of the air outlet damper and sends appropriate signals to the A/C amplifier assembly.
The position sensor is built into the air outlet control servo motor.
HINT
Confirm that no mechanical problem is present because this diagnostic code can be output when either a damper link or the damper is mechanically locked.
Scheme 217
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B1438/49 | Open in Air Outlet Damper Position Sensor Circuit | No. 3 air conditioning radiator damper servo sub-assembly (air outlet) Harness or connector between No. 3 air conditioning radiator damper servo sub-assembly (air outlet) and air conditioning control assembly Air conditioning control assembly |
| B1439/-49 | Short in Air Outlet Damper Position Sensor Circuit | No. 3 air conditioning radiator damper servo sub-assembly (air outlet) Harness or connector between No. 3 air conditioning radiator damper servo sub-assembly (air outlet) and air conditioning control assembly Air conditioning control assembly |
| B1443/43 | Air outlet damper Control servo motor circuit | No. 3 air conditioning radiator damper servo sub-assembly (air outlet) Harness or connector between No. 3 air conditioning radiator damper servo sub-assembly (air outlet) and air conditioning control assembly Air conditioning control assembly |
Scheme 218
This sensor detects the position of the air mix damper and sends appropriate signals to the A/C amplifier assembly.
The position sensor is built into the air mix control servo motor.
HINT
Confirm that no mechanical problem is present because this diagnostic code can be output when either a damper link or the damper is mechanically locked.
Scheme 219
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B1440/41 | Open in driver side air mix damper position sensor circuit | No. 5 air conditioning radiator damper servo sub-assembly (air mix (for driver side)) Harness or connector between No. 5 air conditioning radiator damper servo sub-assembly (air mix (for driver side)) and air conditioning control assembly. Air conditioning control assembly |
| B1442/-41 | Short in driver side air mix damper position sensor circuit | No. 5 air conditioning radiator damper servo sub-assembly (air mix (for driver side)) Harness or connector between No. 5 air conditioning radiator damper servo sub-assembly (air mix (for driver side)) and air conditioning control assembly. Air conditioning control assembly |
| B1446/E41 | Driver side air mix damper position sensor circuit | Air conditioning radiator damper servo sub-assembly (air mix (for driver side)) Harness or connector between air conditioning radiator damper servo sub-assembly (air mix (for driver side)) and air conditioning control assembly. Air conditioning control assembly |
Scheme 220
In this circuit, the air conditioning control assembly receivers engine coolant temperature signals from the ECM using the CAN communication system.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| E24 | Ignition switch : ON Engine coolant temperature data is interrupted for 0.5 seconds. | Engine coolant temperature sensor Harness or connector between Engine coolant temperature sensor and ECM ECM air conditioning control assembly CAN communication system |
Scheme 221
| DTC No. | DTC Detecting Condition | Trouble Area |
|---|---|---|
| U0073 | Control Module Communication Bus Off | CAN communication system |
| U0100 | Lost Communication With ECM/PCM "A" | CAN communication system ECM |
| U0101 | Lost Communication With TCM | CAN communication system TCM |
| U0122 | Lost Communication with Vehicle Dynamics Control Module | CAN communication system Skid control ECU (brake actuator assembly) |
| U0140 | Lost Communication with Body Control Module | CAN communication system Main body ECU (network gateway ECU) |
| U0155 | Lost Communication With Instrument Panel Cluster Control Module | CAN communication system Combination meter assembly |
| U0401 | Invalid Data Received from ECM/PCM "A" | CAN communication system ECM |
| U0402 | Invalid Data Received from TCM | CAN communication system TCM |
| U0416 | Invalid Data Received from Vehicle Dynamics Control Module | CAN communication system Skid control ECU (brake actuator assembly) |
| U0422 | Invalid Data Received from Body Control Module | CAN communication system Main body ECU (network gateway ECU) |
| U0423 | Invalid Data Received from Instrument Panel Cluster Control Module | CAN communication system Combination meter assembly |
The blower motor with fan sub-assembly is operated by signals from the air conditioning control assembly. Blower motor speed signals are transmitted in accordance with changes in the duty ratio.
Scheme 222
When the air conditioning control assembly is turned on, a magnetic clutch on signal is sent from the heater relay terminal of the air conditioning control assembly. Then, the engine room relay block assembly turns on to operate the magnetic clutch assembly.
Scheme 223
The main power source is supplied to the air conditioning control assembly when the ignition switch is ON.
The power is used for operating the air conditioning control assembly, servo motors, etc.
Scheme 224
The back-up power source circuit for the air conditioning control assembly is shown below. Power is supplied even when the ignition switch is off. The power is used for diagnostic trouble code memory, etc.
