Check Mode Procedure

CHECK MODE PROCEDURE
1. DESCRIPTION
(a) Check mode has a higher sensitivity to malfunctions and can detect malfunctions that normal mode cannot detect. Check mode can also detect all the malfunctions that normal mode can detect. In check mode, DTCs are detected with 1-trip detection logic.
2. DTC CHECK (CHECK MODE)

HINT:
Intelligent tester only: Compared to normal mode, check mode is more sensitive for detecting malfunctions.
Furthermore, the same diagnostic items which are detected in normal mode can also be detected in check mode.





(a) Procedure for check mode using the intelligent tester.
(1) Check the initial conditions.
^ Battery positive voltage 11 V or more
^ Throttle valve fully closed
^ Transaxle in the P or N position
^ A/C switched OFF
(2) Turn the ignition switch off.
(3) Connect the intelligent tester to the DLC3.
(4) Turn the ignition switch to the ON position and turn the intelligent tester main switch on.





(5) Select the following items: DIAGNOSIS / ENHANCED OBD II / CHECK MODE (Check that the MIL flashes as shown in the illustration).

NOTICE: All DTCs and freeze frame data recorded are erased if: 1) the intelligent 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 the ON position to the ACC or LOCK position.

(6) Start the engine (the MIL goes off after the engine starts).
(7) Perform MONITOR DRIVE PATTERN for the ECT test, or simulate the conditions of the malfunction described by the customer. Monitors, Trips, Drive Cycles and Readiness Codes

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

(8) After simulating malfunction conditions, use the intelligent tester to check the DTCs and freeze frame data.