Check Mode

Diagnostic Trouble Code Check (TOYOTA Hand-held Tester only)

Compared to the normal mode, the check mode has an increased sensitivity to detect malfunctions. Furthermore, the same diagnostic items which are detected in the normal mode can also be detected in the check mode.

1. Initial conditions.
- Battery positive voltage 11 V or more.
- Throttle valve fully closed.
- Transmission in park or neutral position.
- Air conditioning switched OFF.
2. Turn ignition switch OFF.
3. Prepare the TOYOTA hand-held tester.





4. Connect the TOYOTA hand-held tester to data link connector 3 in the fuse box at the center upper of the instrument panel.
5. Turn the ignition switch ON and switch the TOYOTA hand-held tester ON.





6. Switch the TOYOTA hand-held tester normal mode to check mode. (Check that the malfunction indicator lamp flashes.)
7. Start the engine. (The malfunction indicator lamp goes out after the engine starts.)
8. Simulate the conditions of the malfunction described by the customer.

NOTE: Leave the ignition switch ON until you have checked the diagnostic trouble codes, etc.

9. After simulating the malfunction conditions, use the TOYOTA hand-held tester diagnosis selector to check the diagnostic trouble codes 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 diagnostic codes, etc. are erased.

10. After checking the diagnostic trouble code, inspect the applicable circuit.