Dtc B14A3 Front Passenger Side Solar Sensor Short Circuit


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE USING INTELLIGENT TESTER (SOLAR SENSOR)

CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

CHECK HARNESS AND CONNECTOR (SOLAR SENSOR - AIR CONDITIONING AMPLIFIER)

CHECK AUTOMATIC LIGHT CONTROL SENSOR (SOLAR SENSOR)

CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - SOLAR SENSOR)

DTC B14A3 Front Passenger Side Solar Sensor Short Circuit


DESCRIPTION

Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System). Dtc B14A3 Front Passenger Side Solar Sensor Short Circuit
The automatic light control sensor (solar sensor), which is installed on the upper side of the instrument panel, detects sunlight and controls the air conditioning in auto mode. The output current from the solar sensor varies according to the amount of sunlight. When the amount of sunlight increases, the output current increases. As the amount of sunlight decreases, the output current decreases. The air conditioning amplifier assembly detects the output current from the solar sensor.

DTC Code
DTC Detection Condition
Trouble Area
B14A3
An open or short in the passenger side solar sensor circuit.
  1. Automatic light control sensor (solar sensor)
  2. Harness or connector
  3. Main body ECU (multiplex network body ECU)
  4. Air conditioning amplifier assembly

WIRING DIAGRAM


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System). Dtc B14A3 Front Passenger Side Solar Sensor Short Circuit


INSPECTION PROCEDURE

HINT:
  1. If DTC B1244 is output together with other DTCs, troubleshoot DTC B1244 first (LandCruiser RM0000011M108NX.html).
  2. If the check is performed in a dark place, DTC B14A2 or B14A3 (solar sensor circuit abnormal) may be stored even though the system is normal.
1.READ VALUE USING INTELLIGENT TESTER (SOLAR SENSOR)

  1. Use the Data List to check if the automatic light control sensor (solar sensor) is functioning properly (LandCruiser RM000002LIV040X.html).

    Air Conditioner
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Solar Sensor (P side)
    		Automatic light control sensor (solar sensor) / Min.: 0, Max.: 255
    		Passenger side solar sensor voltage increases as brightness increases
    		Open in the circuit: 0.
    Short in the circuit: 255.
    OK:
    The display is as specified in the normal condition column.
    Result
    Result
    		Proceed to
    OK (When troubleshooting according to problem symptoms table)
    		A
    OK (When troubleshooting according to the DTC)
    		B
    NG
    		C


B
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (LandCruiser RM0000039R5028X.html)

C
Go to step 2
A

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (LandCruiser RM0000045E302NX.html)

2.CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System). Dtc B14A3 Front Passenger Side Solar Sensor Short Circuit

  1. Disconnect the H19 sensor connector.

  1. Measure the voltage according to the value(s) in the table below.

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    H19-6 (CLTB) - H19-3 (CLTE)
    		Ignition switch off
    		Below 1 V
    H19-6 (CLTB) - H19-3 (CLTE)
    		Ignition switch ON
    		11 to 14 V
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Automatic Light Control Sensor [Solar Sensor])


NG
Go to step 5
OK


3.CHECK HARNESS AND CONNECTOR (SOLAR SENSOR - AIR CONDITIONING AMPLIFIER)

  1. Disconnect the H19 sensor connector.

  1. Disconnect the G25 amplifier connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    for LHD
    Tester Connection
    		Condition
    		Specified Condition
    H19-2 (TSR) - G25-32 (TSP)
    		Always
    		Below 1 Ω
    H19-2 (TSR) - Body ground
    		Always
    		10 kΩ or higher
    for RHD
    Tester Connection
    		Condition
    		Specified Condition
    H19-1 (TSL) - G25-32 (TSP)
    		Always
    		Below 1 Ω
    H19-1 (TSL) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.CHECK AUTOMATIC LIGHT CONTROL SENSOR (SOLAR SENSOR)
  1. *1: for RHD
  2. *2: for LHD


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System). Dtc B14A3 Front Passenger Side Solar Sensor Short Circuit

  1. Remove the automatic light control sensor (solar sensor) with its connector still connected (LandCruiser RM0000024C204EX.html).

  1. Measure the voltage according to the value(s) in the table below.

    Standard Voltage:
    for LHD
    Tester Connection
    		 Switch Condition
    		Specified Condition
    H19-2 (TSR) - H19-3 (CLTE)
    		Ignition switch ON
    Sensor subjected to electric light
    		0.8 to 4.3 V
    H19-2 (TSR) - H19-3 (CLTE)
    		Ignition switch ON
    Sensor covered with cloth
    		Below 0.8 V
    for RHD
    Tester Connection
    		Switch Condition
    		Specified Condition
    H19-1 (TSL) - H19-3 (CLTE)
    		Ignition switch ON
    Sensor subjected to electric light
    		0.8 to 4.3 V
    H19-1 (TSL) - H19-3 (CLTE)
    		Ignition switch ON
    Sensor covered with cloth
    		Below 0.8 V
    Text in Illustration
    *A
    		for RHD
    *B
    		for LHD
    *a
    		Component with harness connected
    (Automatic Light Control Sensor [Solar Sensor])
    NOTICE:
    The connection procedure for using a digital tester such as a TOYOTA electrical tester is shown above. When using an analog tester, connect the negative (-) lead to terminal 1*1 or 2*2 and the positive (+) lead to terminal 3 of the solar sensor.
    HINT:
    1. Use an incandescent light for inspection. Bring it within about 30 cm (11.8 in.) of the solar sensor.
    2. As the inspection light is moved away from the sensor, the voltage decreases.


NG
REPLACE AUTOMATIC LIGHT CONTROL SENSOR (SOLAR SENSOR) (LandCruiser RM0000024C204EX.html)
OK

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (LandCruiser RM0000039R5028X.html)

5.CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - SOLAR SENSOR)

  1. Disconnect the G64 ECU connector.

  1. Disconnect the H19 sensor connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    G64-22 (CLTE) - H19-3 (CLTE)
    		Always
    		Below 1 Ω
    G64-20 (CLTB) - H19-6 (CLTB)
    		Always
    		Below 1 Ω
    G64-22 (CLTE) - Body ground
    		Always
    		10 kΩ or higher
    G64-20 (CLTB) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (LandCruiser RM000003WBO05FX.html)