cardiagn.com (b) Turn the ignition switch ON. (c) Measure the voltage between terminals FRS5 (A48-9) and TS (A48-8) of the A/C amplifier connector when the solar sensor is subjected to an electric light, and when the sensor is covered with a cloth. Standard voltage: CONDITION SPECIFIED CONDITION Sensor subjected to electric light 0.8 to 4.3 V Sensor covered with a cloth Below 0.8 V HINT: As the inspection light is moved away from the sensor, the voltage increases. However, if DTC 21 is displayed, check and replace the A/C amplifier. OK REPLACE AIR CONDITIONING AMPLIFIER NG 2. CHECK SOLAR SENSOR (a) Remove the solar sensor.
(b) Connect the positive (+) lead of ohmmeter to terminal 2 and negative (-) lead to terminal 1 of the solar sensor. (c) Measure the resistance between terminals 1 and 2 of the solar sensor connector. Standard resistance: TESTER CONNECTION CONDITION SPECIFIED CONDITION 1 - 2 Sensor subjected to electric light Excep ∞ Ω 1 - 2 Sensor is covered with a cloth ∞ Ω NOTICE: The connection procedure for a digital tester, such as a TOYOTA electrical tester, is shown above. When using an analog tester, connect the negative (-) lead to terminal 1 and positive (+) lead to terminal 2. HINT: As the inspect light is moved away from the sensor, the resistance increases.
Use an in incandescent light for inspection. Bring it within 30 cm (11.8 in.) of the A/C solar sensor. NG REPLACE SOLAR SENSOR OK 3. CHECK WIRE HARNESS (AIR CONDITIONING AMPLIFIER - SOLAR SENSOR) REPAIR OR REPLACE HARNESS AND NG CONNECTOR OK REPLACE AIR CONDITIONING AMPLIFIER OK REPLACE AIR CONDITIONING AMPLIFIER NG REPLACE SOLAR SENSOR NG REPAIR OR REPLACE HARNESS AND CONNECTOR OK REPLACE AIR CONDITIONING AMPLIFIER