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.
- Battery positive voltage 11 V or more.
- Throttle valve fully closed.
- Transmission in the P position.
- Air conditioning switched off.
2. Turn the ignition switch OFF.
3. Prepare the 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 switch the LEXUS hand-held tester ON.





6. Switch the LEXUS hand-held tester from normal mode to the check mode. (Check that the MIL flashes.)
7. Start the engine. (The MIL goes out after the engine starts.)
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 freezed frame data. etc.

HINT: Take care not to turn the ignition switch OFF. as turning it off switches the diagnosis system from check mode to normal mode, so all DTCs, etc. are erased.

10. After checking the DTCs, inspect the applicable circuit.