Diagnosis (Check Mode)

DTC CHECK (CHECK MODE)

HINT:
Hand-held tester only:
Check mode has a higher sensitivity to detect malfunctions and can detect malfunctions that normal mode cannot detect. Check mode can also detect all the malfunctions that normal mode can detect.

a. Procedure for check mode using the hand-held tester.




1. Make sure that the conditions below are met:
- Battery positive voltage 11 V or more.
- Throttle valve fully closed.
- Shift lever in the P or N position.
- A/C switched OFF.

2. Turn the ignition switch OFF.
3. Connect the hand-held tester to the DLC3.
4. Turn the ignition switch ON.




5. Change the ECM to check mode with the hand-held tester. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / CHECK MODE. Make sure the MIL flashes as shown in the illustration.

NOTE: All DTCs and freeze frame data recorded will be erased if: 1) the hand-held tester is used to change the ECM from normal mode to check mode or vice-versa; or 2) during check mode, the ignition switch is turned from ON to ACC or OFF.

6. Start the engine. The MIL should turn off after the engine starts.
7. Simulate the conditions of the malfunction described by the customer.
8. After simulating the malfunction conditions, use the hand-held tester diagnosis selector to check the DTC, freeze frame data and other data.
- After checking the DTC, inspect the applicable circuit.