Inspection Procedure 6: When the Cruise Control ON/OFF Switch is Turned ON, the Cruise Control Display Screen is not Displayed (However, the Cruise Control System is Normal).




OPERATION


When the ON/OFF switch is operated, the ON signal is sent to the PHEV-ECU.
When the PHEV-ECU receives the ON signal from the ON/OFF switch, the ECU sends the illumination signal to the cruise control screen in the combination meter via the CAN bus lines.

COMMENTS ON TROUBLE SYMPTOM




PROBABLE CAUSES




DIAGNOSIS PROCEDURE


caution
  • If there is any problem in the CAN bus lines, an incorrect diagnosis code may be stored. Prior to this diagnosis, diagnose the CAN bus lines.
  • Before replacing the ECU, ensure that the CAN bus lines is normal.

STEP 1. Check the CAN bus system diagnosis.


Using M.U.T.-III, perform CAN bus diagnosis (Refer to GROUP 54C - Explanation About The M.U.T.-III Can Bus Diagnostics ).

Q. Is the check result normal?

Go to Step 2
Repair the CAN bus lines (Refer to GROUP 54C - Troubleshooting, Can Bus Diagnostic Table ). Then go to Step 6.

STEP 2. Check the PHEV-ECU diagnosis code.


Using M.U.T.-III, perform PHEV-ECU diagnosis code (Refer to GROUP 54D - Troubleshooting, Diagnosis Function ).

Q. Is diagnosis code No.U0141 stored?

Repair the PHEV-ECU (Refer to GROUP 54D - Troubleshooting, Diagnosis Code Procedures, Code No.U0141: ETACS-ECU Time-out ). Then go to Step 6.
Go to Step 3

STEP 3. Check the ETACS system diagnosis code.


Using M.U.T.-III, perform ETACS system diagnosis code (Refer to GROUP 54A - ETACS, Troubleshooting, Diagnosis Function ).

Q. Is diagnosis code No.U0155 stored?

Repair the ETACS system (Refer to GROUP 54A - Troubleshooting, Diagnosis Code Procedures, Code No.U0155: Combination Meter-ECU CAN Communication Timeout ). Then go to Step 6.
Go to Step 4

STEP 4. Check the combination meter system special function.


Using M.U.T.-III, check the combination meter system special function (Refer to GROUP 54A - Combination Meter, Special Function Table ).

  • Item No.2: LCD (AUTO)

Q. Is the check result normal?

Go to Step 5
Repair the combination meter system (Refer to GROUP 54A - Combination Meter, Trouble Symptom Chart ). Then go to Step 6.

STEP 5. Check the symptom.


Q. When the cruise control ON/OFF switch is turned ON, is the cruise control display screen displayed?

It can be assumed that this malfunction is intermittent (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points, How to Cope with Intermittent Malfunction ).
Replace the PHEV-ECU (Refer to GROUP 54D - PHEV-ECU ). Then go to Step 6.

STEP 6. Check the symptom.


Q. When the cruise control ON/OFF switch is turned ON, is the cruise control display screen displayed?

The procedure is complete.
Return to Step 1.