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. CHECK MODE PROCEDURE
(a) Make sure that the following conditions are met:
(1) Battery positive voltage 11 V or more.
(2) Throttle valve fully closed.
(3) Shift lever P or N position.
(4) A/C off.
(b) Turn the engine switch off.
(c) Connect the intelligent tester or Techstream to the DLC3.
(d) Turn the engine switch on (IG).
(e) Turn the tester ON.
(f) Enter the following menus:

Intelligent tester
Select: DIAGNOSIS / OBD/MOBD / ECT / CHECK MODE.

Techstream
Select: Powertrain / ECT / Check Mode.





(g) Change the TCM to check mode. Make sure the MIL flashes as shown in the illustration.

NOTICE:
All DTCs and freeze frame data will be erased if: 1) the intelligent tester or Techstream is used to change the TCM from normal mode to check mode or vice versa; or 2) during check mode, the engine switch on (IG) to ACC or off.
Before check mode, make notes of the DTCs and freeze frame data.

(h) Start the engine. The MIL should turn off after the engine starts.
(i) Perform "MONITOR DRIVE PATTERN" for the ECT test. Monitors, Trips, Drive Cycles and Readiness Codes
(Or, simulate the conditions of the malfunction described by the customer.)
(j) After simulating the malfunction conditions, use the tester to check the DTC and freeze frame data.