INSPECTION PROCEDURE 19: Modes cannot be switched by using the battery save switch




COMMENTS ON TROUBLE SYMPTOM


If the battery energy level cannot be maintained by operating the battery save switch, the battery charge switch or the PHEV-ECU is suspected.

PROBABLE CAUSES



  • Malfunction of battery save 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 100: Battery save switch
Check condition
Normal condition
The battery save 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 battery save switch.


Refer to .

Q. Is the check result normal?

Go to Step 3.
Replace the battery save switch (Refer to ).

STEP 3. Check of short to earth and open circuit in the signal line. (PHEV-ECU and the battery save switch).



  • Check the wiring harness between PHEV-ECU (SAVE terminal) connector and the battery save switch connector terminal No.2.

Q. Is the check result normal?

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

STEP 4. Check of open circuit in the earth line. (Battery save switch and body earth).



  • Check the wiring harness between battery save switch connector terminal No.5 and the body earth.

Q. Is the check result normal?

Go to Step 5.
Repair the connector or wiring harness.

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 ).