Last Modified: 07-31-2024 6.11:8.1.0 Doc ID: RM100000002B368
Model Year Start: 2023 Model: Corolla Hatchback Prod Date Range: [03/2023 -           ]
Title: K120 / K121 (CVT): K121 CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: CHECK MODE PROCEDURE; 2023 - 2025 MY Corolla Corolla Hatchback [03/2023 -        ]

CHECK MODE PROCEDURE

DESCRIPTION

(a) Check mode has a higher sensitivity to malfunctions and can detect malfunctions that cannot be detected in normal mode. Check mode can also detect all of the malfunctions that can be detected in normal mode. In check mode, DTCs are stored with 1-trip detection logic.

NOTICE:

  • All DTCs and freeze frame data will be cleared if: 1) the GTS 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.
  • Before changing to check mode, make a note of the DTCs and freeze frame data.

CHECK MODE PROCEDURE

(a) Make sure that the following conditions are met:

  • Battery voltage is 11 V or higher.
  • The throttle valve is fully closed.
  • The shift lever is in P or N.
  • The A/C switch is off.

(b) Check that the MIL flashes as shown in the illustration.

Powertrain > Engine > Utility

Tester Display

Check Mode

(c) Start the engine. The MIL should turn off after the engine starts.

(d) Simulate the conditions of the malfunction described by the customer.

(e) Using the GTS, check for DTCs and freeze frame data.