Work Flow

DETAILED FLOW 

1. INTERVIEW FROM THE CUSTOMER 
   1. Clarify customer complaints before inspection. First of all, perform an interview utilizing, refer to Diagnostic Work Sheet , and reproduce symptoms to understand them fully. Ask customer about his/her complaints carefully. Check symptoms by driving vehicle with customer, if necessary.
      CAUTION:

      Customers are not professional. Never make assumptions like "maybe the customer means that...," or "maybe the customer mentioned this symptom".

   >>

   GO TO 2.

2. CHECK SYMPTOM 
   1. Reproduce the symptom that is indicated by the customer, based on the information from the customer obtained by interview. Also check that the symptom is not caused by protection function. Refer to Fail-Safe .
      CAUTION:

      When the symptom is caused by normal operation, fully inspect each portion and obtain the understanding of customer that the symptom is not caused by a malfunction.

   >>

   GO TO 3.

3. CHECK VEHICLE CONDITION 
   1. CONSULT
      1. Ignition switch ON.
      2. Select "ECU temperature" in "Data Monitor" mode of "EPS/DAST 3".

         Monitor item	Values
         ECU temperature	194°F (90°C) or less

   Is the inspection result normal?

   YES>>

   GO TO 4.

   NO>>

   Wait with the ignition switch OFF until the "Data Monitor" indication becomes 194 °F (90 °C) or less. Go to 4 after the temperature drops to 194 °F (90 °C) or less.

4. PERFORM SELF DIAGNOSTIC RESULT 
   1. CONSULT Select "Self Diagnostic Result" mode of "EPS/DAST 3".

   Is any DTC detected?

   YES>>

   Record or print DTC and freeze frame data (FFD). GO TO 5.

   NO>>

   GO TO 7.

5. RECHECK SYMPTOM 
   1. CONSULT
      1. Erase "Self Diagnostic Result" mode of "EPS/DAST 3".
      2. Perform DTC confirmation procedures for the malfunctioning system.
      NOTE: If some DTCs are detected at the same time, determine the order for performing the diagnosis based on. Refer to DTC Inspection Priority Chart .

   Is any DTC detected?

   YES>>

   GO TO 6.

   NO>>

   Check harness and connectors based on the information obtained by interview.

6. REPAIR OR REPLACE THE MALFUNCTIONING COMPONENTS. 
   1. CONSULT
      • Repair or replace the malfunctioning components.
      • Reconnect part or connector after repairing or replacing.
      • When DTC is detected, erase "Self Diagnostic Result" mode of "EPS/DAST 3".

   >>

   GO TO 8.

7. IDENTIFY THE MALFUNCTIONING SYSTEM BY SYMPTOM DIAGNOSIS 
   1. Estimate the malfunctioning system based on symptom diagnosis and perform inspection.

   Can the malfunctioning system be identified?

   YES>>

   GO TO 8.

   NO>>

   Check harness and connectors based on the information obtained by interview.

8. FINAL CHECK 
   1. CONSULT
      1. Check the reference value for EPS control unit.
      2. Recheck the symptom and check that symptom is not reproduced on the same conditions.

   Is the symptom reproduced?

   YES>>

   GO TO 3.

   NO>>

   Inspection End.