Heating Air Conditioning. Dtc B14A3 Front Passenger Side Solar Sensor Short Circuit

Vehicle Interior. Land Cruiser. Urj200, 202 Grj200 Vdj200

Heating Air Conditioning. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE USING INTELLIGENT TESTER (PASSENGER SIDE SOLAR SENSOR)

CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - AUTOMATIC LIGHT CONTROL SENSOR)

INSPECT AUTOMATIC LIGHT CONTROL SENSOR (TSR, TSL - CLTE VOLTAGE)

CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - AUTOMATIC LIGHT CONTROL SENSOR)

DTC B14A3 Front Passenger Side Solar Sensor Short Circuit

DESCRIPTION

Land Cruiser. Urj200, 202 Grj200 Vdj200.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 sunlight increases, the output current increases. As the sunlight decreases, the output current decreases. The air conditioning amplifier assembly detects 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.	Automatic light control sensor (solar sensor) Harness or connector between solar sensor and air conditioning amplifier assembly Harness or connector between solar sensor and main body ECU (cowl side junction block LH) Main body ECU (cowl side junction block LH) Air conditioning amplifier assembly

HINT:

If DTC B1244 is output at the same time, troubleshoot DTC B1244 first.

WIRING DIAGRAM

INSPECTION PROCEDURE

1.READ VALUE USING INTELLIGENT TESTER (PASSENGER SIDE SOLAR SENSOR)

Use the Data List to check if the front passenger side solar sensor is functioning properly.

Air Conditioner
Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
Solar Sensor (P Side)	Passenger side 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.

Go to step 2

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (Click here)

2.CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - AUTOMATIC LIGHT CONTROL SENSOR)

w/ Rear Heater
1. Disconnect the F9 sensor connector.
2. Disconnect the E35 amplifier connector.
3. Measure the resistance according to the value(s) in the table below.
  Standard Resistance:
  Tester Connection
  Condition
  Specified Condition
  E35-8 (TSP) - F9-2 (TSR)*1
  Always
  Below 1 Ω
  E35-8 (TSP) - F9-1 (TSL)*2
  Always
  Below 1 Ω
  E35-8 (TSP) - Body ground
  Always
  10 kΩ or higher
  HINT:
  *1: for LHD
  *2: for RHD

w/o Rear Heater
1. Disconnect the F9 sensor connector.
2. Disconnect the E81 amplifier connector.
3. Measure the resistance according to the value(s) in the table below.
  Standard Resistance:
  Tester Connection
  Condition
  Specified Condition
  E81-32 (TSP) - F9-2 (TSR)*1
  Always
  Below 1 Ω
  E81-32 (TSP) - F9-1 (TSL)*2
  Always
  Below 1 Ω
  E81-32 (TSP) - Body ground
  Always
  10 kΩ or higher
  HINT:
  *1: for LHD
  *2: for RHD

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3.INSPECT AUTOMATIC LIGHT CONTROL SENSOR (TSR, TSL - CLTE VOLTAGE)

Remove the automatic light control sensor (Click here).

Apply battery voltage between terminals 6 (CLTB) and 3 (CLTE) of the solar sensor.

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
2 (TSR) - 3 (CLTE)*1	Sensor exposed to electric light	0.8 to 4.3 V
2 (TSR) - 3 (CLTE)*1	Sensor covered with a cloth	Below 0.8 V
1 (TSL) - 3 (CLTE)*2	Sensor exposed to electric light	0.8 to 4.3 V
1 (TSL) - 3 (CLTE)*2	Sensor covered with a cloth	Below 0.8 V

HINT:

As the inspection light is moved away from the sensor, the voltage decreases.
Use an incandescent light for inspection. Bring it about 300 mm (11.8 in.) from the solar sensor.
*1: for LHD
*2: for RHD

REPLACE AUTOMATIC LIGHT CONTROL SENSOR (Click here)

OK

4.CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - AUTOMATIC LIGHT CONTROL SENSOR)

Disconnect the E2 ECU connector.

Disconnect the F9 sensor connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
E2-20 (CLTB) - F9-6 (CLTB)	Always	Below 1 Ω
E2-19 (CLTS) - F9-5 (CLTS)
E2-18 (CLTE) - F9-3 (CLTE)
E2-20 (CLTB) - Body ground	Always	10 kΩ or higher
E2-19 (CLTS) - Body ground
E2-18 (CLTE) - Body ground

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH)