Dtc B14B8 Refrigerant Shortage

Vehicle Interior. Yaris. Ncp93, 131
Heating Air Conditioning. Yaris. Ncp93, 131

SYSTEM DESCRIPTION

INSPECTION PROCEDURE

CHECK FOR AIR CONDITIONING SYSTEM LEAK

REPAIR AIR CONDITIONING SYSTEM LEAK

CHARGE REFRIGERANT

CHECK FOR DTC

REPLACE COOLER EXPANSION VALVE

CHARGE REFRIGERANT

CHECK FOR DTC

DTC B14B8 Refrigerant Shortage


SYSTEM DESCRIPTION

This DTC is stored if the refrigerant is insufficient in the cycle.
The air conditioning amplifier assembly receives the ambient temperature signal, refrigerant pressure signal etc. from the various sensors.
Based on these signals, the air conditioning amplifier assembly detects the amount of refrigerant.
The A/C switch indicator is turned off and air conditioning system is stopped if the amount of refrigerant is insufficient in the cycle.

DTC No.
DTC Detection Condition
Trouble Area
B14B8
When the following conditions is detected using the refrigerant shortage check in normal operation:
The amount of refrigerant is insufficient.
  1. Refrigerant pipe line
  2. Cooler expansion valve
  3. Air conditioning amplifier assembly

INSPECTION PROCEDURE

1.CHECK FOR AIR CONDITIONING SYSTEM LEAK

  1. Install a manifold gauge set.

  1. Recover the refrigerant from the air conditioning system using a refrigerant recovery unit.

  1. Evacuate the air conditioning system and check that vacuum can be maintained in it.

    OK:
    Vacuum can be maintained in the air conditioning system.
    HINT:
    If vacuum cannot be maintained in the air conditioning system, refrigerant may be leaking from it. In this case, it is necessary to repair or replace the leaking part of the air conditioning system.
    Result
    Result
    		Proceed to
    NG
    		A
    OK
    		B


B
Go to step 3
A


2.REPAIR AIR CONDITIONING SYSTEM LEAK

  1. Identify the area where refrigerant leaks (YARIS_NCP93 RM000000R58024X.html).

  1. Repair the identified area of the air conditioning system.

  1. Evacuate the air conditioning system.


NEXT


3.CHARGE REFRIGERANT

  1. Add an appropriate amount of refrigerant (YARIS_NCP93 RM000000R57024X.html).


NEXT


4.CHECK FOR DTC

  1. Check for DTCs when the following conditions are met (YARIS_NCP93 RM000001GUF06ZX.html).

    Measurement Condition
    Item
    		Condition
    A/C Switch
    		ON
    A/C Driving Time
    		15 minutes or more
    Ambient Temperature
    		0 to 49°C (32 to 120°F)
    Engine Coolant Temperature
    		45°C (113°F) or more
    Result
    Result
    		Proceed to
    NG
    		A
    OK
    		B



B
END
A


5.REPLACE COOLER EXPANSION VALVE

  1. Replace the cooler expansion valve with a new or normally functioning one (YARIS_NCP93 RM000004P6V004X.html).

    HINT:
    Replace the cooler expansion valve with a new or normally functioning one because the cooler expansion valve is either stuck or clogged.

NEXT


6.CHARGE REFRIGERANT

  1. Add an appropriate amount of refrigerant (YARIS_NCP93 RM000000R57024X.html).


NEXT


7.CHECK FOR DTC

  1. Check for DTCs when the following conditions are met (YARIS_NCP93 RM000001GUF06ZX.html).

    Measurement Condition
    Item
    		Condition
    A/C Switch
    		ON
    A/C Driving Time
    		15 minutes or more
    Ambient Temperature
    		0 to 49°C (32 to 120°F)
    Engine Coolant Temperature
    		45°C (113°F) or more
    Result
    Result
    		Proceed to
    NG
    		A
    OK
    		B



B
END
A

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (YARIS_NCP93 RM00000214000EX.html)