Check Mode

LEXUS hand-held tester only
Compared to the normal mode, the check mode has high sensing ability to detect malfunctions.
Furthermore, the same diagnostic items which are detected in the normal mode can also be detected in the check mode.

DTC CHECK

1. Initial conditions.
(a) Battery positive voltage 11 V or more.
(b) Throttle valve fully closed.
(c) Transmission in the P position.
(d) Air conditioning switched off.
2. Turn the ignition switch OFF.
3. Prepare a LEXUS hand-held tester.





4. Connect the LEXUS hand-held tester to DLC3 in the fuse box at the lower left of the instrument panel.
5. Turn the ignition switch ON and the LEXUS hand-held tester switch ON.





6. Change the LEXUS hand-held tester from Normal mode to Check mode. (Check that the MIL flashes.)
7. Start the engine. (The MIL goes.)
8. Simulate the conditions of the malfunction described by the customer.

NOTICE: Leave the ignition switch ON until you have checked the DTCs etc.

9. After simulating the malfunction conditions, use the LEXUS hand-held tester diagnosis selector to check the DTCs and freeze frame data, etc.

HINT: Take care not to turn the ignition switch OFF. Turning the ignition switch off switches the diagnosis system from Check mode to Normal mode, so all DTCs etc. are erased.

10. After checking the DTC, inspect the applicable circuit.
Diagnostic Trouble Code Descriptions