INSPECTION PROCEDURE 21: Modes cannot be switched by using the ECO mode switch




COMMENTS ON TROUBLE SYMPTOM


If the ECO mode cannot be switched by operating the ECO mode switch, the ECO mode switch or the PHEV-ECU is suspected.

PROBABLE CAUSES



  • Malfunction of ECO mode switch
  • Damaged harness or connector
  • Malfunction of PHEV-ECU

DIAGNOSIS PROCEDURE


STEP 1. M.U.T.-III service data (PHEV-ECU).


Check that the following service data display contents are normal (Refer to ).
Service data
  • Item 91: ECO mode switch
Check condition
Normal condition
The ECO mode switch is pressed
ON
Other than above
OFF

Q. Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).
Go to Step 2.

STEP 2. Check of short to earth, and open circuit in the signal line. (PHEV-ECU and the hazard indicator assembly).



  • Check the wiring harness between PHEV-ECU (ECO terminal) connector and the hazard indicator assembly connector terminal No.2.

Q. Is the check result normal?

Go to Step 3.
Repair the connector or wiring harness.

STEP 3. Check of open circuit in the earth line. (Hazard indicator assembly and body earth).



  • Check the wiring harness between hazard indicator assembly connector terminal No.11 and the earth connector terminal No.2.

Q. Is the check result normal?

Go to Step 4.
Repair the connector or wiring harness.

STEP 4. Retest the system.


Q. Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).
Replace the hazard indicator assembly (Refer to GROUP 54A - Hazard Warning Lamp Switch ). Then go to Step 5.

STEP 5. Retest the system.


Q. Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).
Replace the PHEV-ECU (Refer to ).