Air Conditioning Amplifier
DTC
CODE DETECTION ITEM TROUBLE AREA MEMORY* DIAGNOSTIC NOTE
- Front room temperature
sensor
If the front side room
- Harness or connector
Stored temperature is approx. -
Room Temperature between room temperature
B1411/11 (8.5 min. 18.6°C (-1.48°F) or less, DTC
Sensor Circuit sensor and air conditioning
or more) B1411/11 may be stored even
amplifier assembly
though the system is normal.
- Air conditioning amplifier
assembly
- Ambient temperature sensor
- Harness or connector If ambient temperature is
between ambient temperature Stored approx. -52.9°C (-63.22°F) or
Ambient Temperature
B1412/12 sensor and air conditioning (8.5 min. less, a trouble code may be
Sensor Circuit
amplifier assembly or more) stored even though the system
- Air conditioning amplifier is normal.
assembly
- No. 1 cooler thermistor
Evaporator - Air conditioning harness Stored
B1413/13 Temperature Sensor assembly (8.5 min. -
Circuit - Air conditioning amplifier or more)
assembly
- Harness or connector
between No. 2 air conditioning
harness assembly and air
conditioning amplifier
Rear Evaporator assembly Stored
B1417/17 Temperature Sensor - No. 2 air conditioning (8.5 min. -
Circuit harness assembly (rear or more)
evaporator temperature
sensor)
- Air conditioning amplifier
assembly
- Exhaust gas sensor (smog
ventilation sensor)
- Harness or connector
between exhaust gas sensor
Exhaust Gas Sensor
B1418/18 (smog ventilation sensor) and - -
Circuit
air conditioning amplifier
assembly
- Air conditioning amplifier
assembly
- Rear room temperature
sensor LH
- Harness or connector If the rear driver side room
Rear Room between rear room Stored temperature is approx. -
B1419/19 Temperature Sensor temperature sensor LH and air (8.5 min. 18.6°C (-1.48°F) or less, DTC
Circuit conditioning amplifier or more) B1419/19 may be stored even
assembly though the system is normal.
- Air conditioning amplifier
assembly
DTC
CODE DETECTION ITEM TROUBLE AREA MEMORY* DIAGNOSTIC NOTE
- Automatic light control
sensor (solar sensor)
- Harness or connector
between solar sensor and air
conditioning amplifier
assembly If the check is performed in a
Stored
Solar Sensor Circuit - Harness or connector dark place, DTC B1424/24
B1421/21 (8.5 min.
(Passenger Side) between solar sensor and main (solar sensor circuit (driver
or more)
body ECU (cowl side junction side)) may also be stored.
block LH)
- Main body ECU (cowl side
junction block LH)
- Air conditioning amplifier
assembly
- Cooler compressor assembly
(A/C lock sensor)
- Compressor drive belt
- Harness or connector
Compressor Lock between cooler compressor
B1422/22 - -
Sensor Circuit assembly and air conditioning
amplifier assembly
- Air conditioning amplifier
assembly
- CAN communication line
- Pressure sensor
- Harness or connector
- Cooler expansion valve
(blocked, stuck)
- Cooler condenser assembly
(blocked, deterioration of
cooling capacity due to dirt)
- Cooler dryer (moisture in the
B1423/23 Pressure Sensor Circuit refrigerant cycle cannot be - -
absorbed)
- Condenser fan (condenser
cannot be cooled down)
- Air conditioning system
(leaks, blocked)
- Refrigerant pipe line
- Air conditioning amplifier
assembly
- Automatic light control
sensor (solar sensor)
- Harness or connector
If the check is performed in a
between solar sensor and air
Stored dark place, DTC B1421/21
Solar Sensor Circuit conditioning amplifier
B1424/24 (8.5 min. (solar sensor circuit
(Driver Side) assembly
or more) (passenger side)) may also be
- Harness or connector
stored.
between solar sensor and main
body ECU (cowl side junction
block LH)
DTC
CODE DETECTION ITEM TROUBLE AREA MEMORY* DIAGNOSTIC NOTE
- Main body ECU (cowl side
junction block LH)
- Air conditioning amplifier
assembly
- Duct sensor RH
Rear Air Foot Duct - Harness or connector (duct Stored
B1429/29 Sensor Circuit on Front sensor RH) (8.5 min. -
Passenger Side - Air conditioning amplifier or more)
assembly
- Air mix servo motor (for front
passenger side)
Air Mix Damper Control
- Air conditioning harness Stored
B1441/41 Servo Motor Circuit -
assembly (30 sec.)
(Passenger Side)
- Air conditioning amplifier
assembly
- REC/FRS damper servo
motor
Air Inlet Damper
- Air conditioning harness Stored
B1442/42 Control Servo Motor -
assembly (30 sec.)
Circuit
- Air conditioning amplifier
assembly
- Air outlet damper servo
motor (for driver side mode)
Air Outlet Damper
- Air conditioning harness Stored
B1443/43 Control Servo Motor -
assembly (30 sec.)
Circuit
- Air conditioning amplifier
assembly
- Cool air bypass damper servo
motor
Passenger Side Cool
- Air conditioning harness Stored
B1445/45 Air Bypass Damper -
assembly (30 sec.)
Control
- Air conditioning amplifier
assembly
- Air mix damper servo motor
(for driver side)
Air Mix Damper Control
- Air conditioning harness Stored
B1446/46 Servo Motor Circuit -
assembly (30 sec.)
(Driver Side)
- Air conditioning amplifier
assembly
- Rear air mix damper servo
motor LH
- No. 2 air conditioning
Rear Air Mix Damper harness assembly
Stored
B1447/47 Control Servo Motor - Harness or connector -
(30 sec.)
Circuit on Driver Side between No. 2 air conditioning
harness assembly and air
conditioning amplifier
assembly
DTC
CODE DETECTION ITEM TROUBLE AREA MEMORY* DIAGNOSTIC NOTE
- Air conditioning amplifier
assembly
- Air outlet damper servo
motor (for front passenger
side mode)
Passenger Side FACE Stored
B1448/48 - Air conditioning harness -
Servo Motor Circuit (30 sec.)
assembly
- Air conditioning amplifier
assembly
- Rear air outlet damper servo
motor
- No. 2 air conditioning
harness assembly
Rear Air Outlet Damper - Harness or connector
Stored
B1449/49 Control Servo Motor between No. 2 air conditioning -
(30 sec.)
Circuit harness assembly and air
conditioning amplifier
assembly
- Air conditioning amplifier
assembly
- Front air mix damper servo
motor (for driver side rear air
Driver Side Air Outlet flow)
Stored
B1457/57 Damper Control Servo - Air conditioning harness -
(30 sec.)
Motor Circuit assembly
- Air conditioning amplifier
assembly
- Front air mix damper servo
motor (for front passenger
Passenger Side Air side rear air flow)
Stored
B1458/58 Outlet Damper Control - Air conditioning harness -
(30 sec.)
Servo Motor Circuit assembly
- Air conditioning amplifier
assembly
- Exhaust gas sensor (smog
ventilation sensor)
- Harness or connector
between exhaust gas sensor
Emission Gas NOx
B1461/61 (smog ventilation sensor) and - -
Sensor Circuit
air conditioning amplifier
assembly
- Air conditioning amplifier
assembly
- Duct sensor LH
Rear Air Foot Duct - Harness or connector (duct Stored
B1467/67 Sensor Circuit on sensor LH) (8.5 min. -
Driver Side - Air conditioning amplifier or more)
assembly
DTC
CODE DETECTION ITEM TROUBLE AREA MEMORY* DIAGNOSTIC NOTE
- Rear room temperature
sensor RH
- Harness or connector If the rear passenger side
Rear Passenger Side between rear room Stored room temperature is approx. -
B1468/68 Room Temperature temperature sensor RH and air (8.5 min. 18.6°C (-1.48°F) or less, DTC
Sensor Circuit conditioning amplifier or more) B1468/68 may be stored even
assembly though the system is normal.
- Air conditioning amplifier
assembly
- Air outlet damper servo
motor (for rear seat mode)
Driver Side Air Outlet
- Air conditioning harness Stored
B1486/86 Damper Control Servo -
assembly (30 sec.)
Motor Circuit
- Air conditioning amplifier
assembly
- Rear air mix damper servo
motor RH
- No. 2 air conditioning
harness assembly
Rear Air Mix Damper
- Harness or connector
Control Servo Motor Stored
B1488/88 between No. 2 air conditioning -
Circuit on Front (30 sec.)
harness assembly and air
Passenger Side
conditioning amplifier
assembly
- Air conditioning amplifier
assembly
- Air conditioning harness
BUS IC Communication assembly
B1497/97 - -
Malfunction - Air conditioning amplifier
assembly
- Air conditioning amplifier
assembly
Multiplex
B1499/99 - ECM - -
Communication Circuit
- Meter ECU
- CAN communication line
