DTC B1424/24: Solar Sensor Circuit (Driver Side): Procedure

1. Connect Techstream to the DLC3.
2. Turn the ignition switch on (IG) and turn Techstream on.
3. Select the item below in the Data List, and read the display on Techstream.
   DATA LIST / AIR CONDITIONER:
   
   

   Item	Measurement Item / Display (Range)	Normal Condition	Diagnostic Note
   Solar Sensor (D side)	Solar sensor (Driver side) / min.: 0 max.: 255	Increases as brightness increases	-

   OK

   The display is as specified in the normal condition.

   Result

   Result	Proceed to
   NG	A
   OK (Checking from the PROBLEM SYMPTOMS TABLE)	B
   OK (Checking from the DTC)	C

B → PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE 

C → REPLACE AIR CONDITIONING AMPLIFIER 

A: Go to next step 

1. Remove the multiplex network body ECU with connectors sill connected.
   Fig 1: Identifying Multiplex Network Body ECU (CLTB - CLTE) Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Turn the ignition switch on (IG).
3. Measure the voltage according to the value(s) table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   D7-6 (CLTB) - D7-4 (CLTE)	Ignition switch on (IG)	10 to 14 V

OK → See step   4 

NG: Go to next step 

1. Disconnect the connector from the A/C solar sensor.
2. Disconnect the connector from the multiplex network body ECU.
3. Measure the resistance according to the value(s) table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   F1-6 (CLTB) - D7-6 (CLTB)	Always	Below 1 Ω
   F1-3 (CLTE) - D7-4 (CLTE)	Always	Below 1 Ω
   F1-6 (CLTB) - Body ground	Always	10 kΩ or higher
   F1-3 (CLTE) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → REPLACE MULTIPLEX NETWORK BODY ECU 

1. Disconnect the connector from the A/C solar sensor.
2. Disconnect the connector from the A/C amplifier.
3. Measure the resistance according to the value(s) table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   D37-35 (TSD) - F1-1 (TSL)	Always	Below 1 Ω
   D37-35 (TSD) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Remove the A/C solar sensor.
   Fig 2: Identifying F1 A/C Solar Sensor Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Apply battery voltage between terminals F1-3 (CLTE) and F1-6 (CLTB) of the A/C solar sensor.
3. Measure the voltage according to the value(s) table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   F1-1 (TSL) - F1-3 (CLTE)	Sensor is subject to electric light	0.8 to 4.3 V
   F1-1 (TSL) - F1-3 (CLTE)	Sensor is covered with a cloth	Below 0.8 V

   NOTE:

   • The connection procedure for using a digital tester such as a TOYOTA electrical tester is shown above. when using an analog tester, connect the positive (+) lead to terminal 2 and negative (-) lead to terminal 1 of the solar sensor.
   • 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: 

   • As the inspection light is moved away from the sensor, the voltage decreases.
   • Use an incandescent light for inspection. Bring it within 30 cm (11.8 in.) of the solar sensor.

NG → REPLACE A/C SOLAR SENSOR 

OK → REPLACE AIR CONDITIONING AMPLIFIER