B1421 Detection Item CIRCUIT DESCRIPTION

2000 Lexus ES 300 V6-3.0L (1MZ-FE) Copyright ? 2013, ALLDATA 10.52SS Page 1
A L L Diagnostic Trouble Codes ( DTC ): B Code Charts
B1421
Detection Item
CIRCUIT DESCRIPTION
A photo diode in the solar sensor detects solar radiation and sends signals to the A/C control assembly.
Wiring Diagram
2000 Lexus ES 300 V6-3.0L (1MZ-FE) Copyright ? 2013, ALLDATA 10.52SS Page 2
Steps 1 - 2
2000 Lexus ES 300 V6-3.0L (1MZ-FE) Copyright ? 2013, ALLDATA 10.52SS Page 3
Steps 3 - 4
INSPECTION PROCEDURE
HINT: In case of using the hand-held tester, start the inspection step 1 and in case of not using the hand-held tester start from step 2.