Detailed Flow

Check the malfunction symptoms by performing the following items.

• Obtain the malfunction information (conditions and environment when the malfunction occurred) from the customer.
• Perform the ICC system action test to check the ICC system operation status. Refer to "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT: SPECIAL REPAIR REQUIREMENT ".

  GO TO 2

1. Perform self-diagnosis of ICC unit.
2. Check if DTC is detected.

   Is any DTC detected? 

   YES: GO TO 3

   No: GO TO  4

1. Check the DTC detected in the self-diagnosis results.
2. Perform the relevant diagnosis by referring to the DTC index. Refer to "DIAGNOSTIC TROUBLE CODE (DTC) CHART ".
   NOTE: If "CAN COMM CIRCUIT [U1000]" (DTC 20) is displayed, start with the diagnosis for the CAN communication system. Refer to "DIAGNOSIS PROCEDURE ".

   GO TO  5

Referring to the diagnosis chart by symptom, perform the relevant diagnosis. Refer to "SYMPTOM CHART ".

GO TO 5

Repair or replace applicable item.

GO TO 6

1. Erase DTC.
2. Perform the self-diagnosis for the ICC unit again after repairing or replacing the applicable item.
3. Check if DTC is detected.

   Is any DTC detected? 

   YES: GO TO  3

   No: GO TO 7

Test the ICC system for normal operation to see if the malfunction symptom is solved and no other symptoms are present.

No symptoms? 

YES: INSPECTION END.

No: GO TO  4