Lexus IS250 IS220d GSE20 ALE20 2AD-FHV ENGINE CONTROL SYSTEM

ECD SYSTEM - CHECK MODE PROCEDURE

• HINT:

• Check mode has a higher sensitivity to malfunctions and can detect malfunctions that normal mode cannot detect. Check mode can also detect the same malfunctions that normal mode can detect.

• In check mode, the ECM will detect faults and set DTCs more effectively than in normal mode.

• NOTICE:

• All the stored DTCs and freeze frame data are erased if: 1) the ECM is changed from normal mode to check mode or vice versa; or 2) the engine switch is turned from ON (IG) to ACC or OFF during check mode.

• Before changing modes, always check and note any stored DTCs and freeze frame data.

Turn the engine switch OFF.

Make sure that the vehicle is in the following condition:

Battery voltage is 11 V or more.

Accelerator pedal is not depressed.

Parking brake is off.

Shift lever is in the N position.

A/C switch is OFF.

Connect the intelligent tester to the DLC3.

Turn the engine switch ON (IG) and turn the intelligent tester ON.

Enter the following menus: Powertrain / Engine / Check Mode.

Make sure that the MIL flashes as shown in the illustration.

Start the engine (the MIL should turn OFF).

Simulate the conditions of the malfunction described by the customer.

Check the DTC(s) and freeze frame data using the intelligent tester.

After checking for DTCs, inspect the appropriate circuits .