DESCRIPTION
The 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 detects output current from the solar
sensor.
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DTC Code
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DTC Detection Condition
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Trouble Area
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B1424/24
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Open or short in driver side solar sensor circuit
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- Automatic light control sensor (solar sensor)
- Harness or connector between solar sensor and air conditioning amplifier
- Harness and connector between solar sensor and main body ECU
- Main body ECU
- Air conditioning amplifier
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WIRING DIAGRAM
CAUTION / NOTICE / HINT
HINT:
If DTC B1244 is output at the same time, troubleshoot DTC B1244 first (see page
 ).
PROCEDURE
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1.
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READ VALUE USING TECHSTREAM (SOLAR SENSOR (for Driver Side))
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(a) Use the Data List to check if the driver side solar sensor is functioning
properly.
Air Conditioner
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Tester Display
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Measurement Item / Range
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Normal Condition
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Diagnostic Note
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Solar Sensor (D Side)
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Driver side solar sensor /
Min.: 0
Max.: 255
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Driver side solar sensor voltage increases as brightness increases
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Open in circuit: 0
Short in circuit: 255
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OK:
The display is as specified in the normal condition.
Result
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Result
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Proceed to
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NG
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A
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OK (Checking from the PROBLEM SYMPTOMS TABLE)
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B
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OK (Checking from the DTC)
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C
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| B |
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PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
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| C |
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REPLACE AIR CONDITIONING AMPLIFIER
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| A |
|
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2.
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CHECK HARNESS AND CONNECTOR (SOLAR SENSOR)
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(a) Disconnect the J128 solar sensor connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
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Tester Connection
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Condition
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Specified Condition
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J128-3 (CLTE) - Body ground
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Always
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Below 1 Ω
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(c) Measure the voltage according to the value(s) in the table below.
Standard voltage:
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Tester Connection
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Switch Condition
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Specified Condition
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J128-6 (CLTB) - J128-3 (CLTE)
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Ignition switch ON
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11 to 14 V
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Ignition switch OFF
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Below 1 V
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| NG |
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GO TO STEP 5
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| OK |
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|
|
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3.
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CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - SOLAR SENSOR)
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(a) Disconnect the J19 air conditioning amplifier connector.
(b) Disconnect the J128 solar sensor connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:
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Tester Connection
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Condition
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Specified Condition
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J19-33 (TSD) - J128-1 (TSL)
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Always
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Below 1 Ω
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J19-33 (TSD) or J128-1 (TSL) - Body ground
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Always
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10 kΩ or higher
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| NG |
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REPAIR OR REPLACE HARNESS OR CONNECTOR
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| OK |
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|
|
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4.
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CHECK AUTOMATIC LIGHT CONTROL SENSOR (SOLAR SENSOR (TSL - CLTE VOLTAGE))
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(a) Remove the solar sensor with its connector still connected (see page
).
(b) Apply battery voltage between terminals 6 (CLTB) and 3 (CLTE) of the solar
sensor.
(c) Measure the voltage according to the value(s) in the table below.
Standard voltage:
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Tester Connection
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Condition
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Specified Condition
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1 (TSL) - 3 (CLTE)
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Sensor is subjected to electric light
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0.8 to 4.3 V
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Sensor is covered with a cloth
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Below 0.8 V
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HINT:
- As the inspection light is moved away from the sensor, the voltage decreases.
- Use an incandescent light for inspection. Bring it approximately 30 cm (11.8
in.) from the solar sensor.
| OK |
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REPLACE AIR CONDITIONING AMPLIFIER
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| NG |
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REPLACE AUTOMATIC LIGHT CONTROL SENSOR (SOLAR SENSOR)
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5.
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CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - SOLAR SENSOR AND BODY GROUND)
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(a) Disconnect the J3 ECU connector.
(b) Disconnect the J128 solar sensor connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:
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Tester Connection
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Condition
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Specified Condition
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J3-18 (CLTE) - J128-3 (CLTE)
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Always
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Below 1 Ω
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J3-20 (CLTB) - J128-6 (CLTB)
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J3-18 (CLTE) or J128-3 (CLTE) - Body ground
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Always
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10 kΩ or higher
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J3-20 (CLTB) or J128-6 (CLTB) - Body ground
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| OK |
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REPLACE MAIN BODY ECU
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| NG |
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REPAIR OR REPLACE HARNESS OR CONNECTOR
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