Reading Diagnostic Trouble Codes

NOTE: This is the only information provided by the manufacturer for reading diagnostic trouble codes for this system. LEXUS does not provide a procedure for reading diagnostic trouble codes without a scan tool.

PRE-CHECK




1. DTC CHECK USING LEXUS HAND-HELD TESTER
a. Hook up the LEXUS hand-held tester to the DLC3
b. Read the diagnostic trouble codes by following the prompts on the tester screen.
Please refer to the LEXUS hand-held tester operator's manual for further details.




2. CLEARING DTC
a. Pull out the ECU-B1 fuse in engine room J/B for 10 sec. or longer to clear diagnostic the DTC's memory.
b. After reinserting the fuse, check that the normal code is output.


3. ACTUATOR CHECK
a. Connect the LEXUS hand-held tester to the DLC3.
b. Turn the ignition switch to ON and LEXUS hand-held tester main switch ON.
c. Select the ACTIVE TEST mode on the LEXUS hand-held tester.




d. Check the temperature and air flow visual and by hand.