DTC    B14A2    Driver Side Solar Sensor Short Circuit

for Preparation Click here


DESCRIPTION

E107008E01
The automatic light control sensor (solar sensor) is installed on the upper side of the instrument panel. It detects sunlight to control air conditioning AUTO mode. The output voltage from the automatic light control sensor (solar sensor) varies in accordance with the amount of sunlight. When the amount of sunlight increases, the output voltage increases. As the sunlight decreases, the output voltage decreases. The air conditioning amplifier assembly detects changes in the output voltage from the automatic light control sensor (solar sensor).

DTC No.
DTC Detection Condition
Trouble Area
B14A2
Short in driver side solar sensor circuit
  1. Automatic light control sensor (solar sensor)
  2. Harness or connector between automatic light control sensor (solar sensor) and air conditioning amplifier assembly
  3. Harness or connector between automatic light control sensor (solar sensor) and main body ECU (multiplex network body ECU)
  4. Main body ECU (multiplex network body ECU)
  5. Air conditioning amplifier assembly

WIRING DIAGRAM


E161724E49


INSPECTION PROCEDURE

HINT:
If DTC B1244 is output together with other DTCs, troubleshoot DTC B1244 first (Click here).

1.READ VALUE USING INTELLIGENT TESTER

  1. Connect the intelligent tester to the DLC3.

  1. Turn the power switch on (IG).

  1. Turn the intelligent tester on.

  1. Enter the following menus: Body / Air Conditioner / Data List.

  1. Check the value(s) by referring to the table below.

    Air Conditioner 
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Solar Sensor (D side)
    		Driver side solar sensor /
    Min.: 0
    Max.: 255
    		Driver side solar sensor value increases as brightness increases
    		-

    OK:
    The display is as specified in the Normal Condition column.


    Result:

    Result
    		Proceed to
    NG
    		A
    OK (When troubleshooting according to Problem Symptoms Table)
    		B
    OK (When troubleshooting according to the DTC)
    		C



B
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (Click here)

C
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (Click here)
A


2.CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)
E221132E05

  1. Disconnect the I1 automatic light control sensor (solar sensor) connector.

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    I1-6 (CLTB) - I1-3 (CLTE)
    		Power switch off
    		Below 1 V
    I1-6 (CLTB) - I1-3 (CLTE)
    		Power switch on (IG)
    		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 (AUTOMATIC LIGHT CONTROL SENSOR - AIR CONDITIONING AMPLIFIER)

  1. Disconnect the H85 air conditioning amplifier assembly connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    H85-33 (TSD) - I1-1 (TSL)*1
    		Always
    		Below 1 Ω
    H85-33 (TSD) - I1-2 (TSR)*2
    		Always
    		Below 1 Ω
    H85-33 (TSD) - Body ground
    		Always
    		10 kΩ or higher

    1. *1: for LHD
    2. *2: for RHD



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.INSPECT AUTOMATIC LIGHT CONTROL SENSOR


    E221134E09

  1. Remove the automatic light control sensor (solar sensor).

  1. Reconnect the I1 automatic light control sensor (solar sensor) connector.

  1. Turn the power switch on (IG).

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    I1-1 (TSL) - I1-3 (CLTE)*1
    		Sensor is exposed to electric light
    		0.8 to 4.3 V
    I1-1 (TSL) - I1-3 (CLTE)*1
    		Sensor is covered with a cloth
    		Below 0.8 V
    I1-2 (TSR) - I1-3 (CLTE)*2
    		Sensor is exposed to electric light
    		0.8 to 4.3 V
    I1-2 (TSR) - I1-3 (CLTE)*2
    		Sensor is covered with a cloth
    		Below 0.8 V

    NOTICE:
    1. 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, 2*2 and the positive (+) lead to terminal 3 of the automatic light control sensor (solar sensor).
    2. While using the battery during inspection, do not bring the positive (+) and negative (-) tester probes too close to each other as a short circuit may occur.

    HINT:
    1. Use an incandescent light for inspection. Bring it within about 30 cm (11.8 in.) of the automatic light control sensor (solar sensor).
    2. As the inspection light is moved away from the sensor, the voltage decreases.

    1. *1: for LHD
    2. *2: for RHD
    Text in Illustration 
    *A
    		for LHD
    *B
    		for RHD
    *a
    		Component with harness connected
    (Automatic Light Control Sensor (Solar Sensor))



NG
REPLACE AUTOMATIC LIGHT CONTROL SENSOR (Click here)
OK

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (Click here)  

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

  1. Disconnect the H16 main body ECU (multiplex network body ECU) connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    H16-20 (CLTB) - I1-6 (CLTB)
    		Always
    		Blow 1 Ω
    H16-22 (CLTE) - I1-3 (CLTE)
    		Always
    		Blow 1 Ω
    H16-20 (CLTB) - Body ground
    		Always
    		10 kΩ or higher
    H16-22 (CLTE) - Body ground
    		Always
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (Click here)