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Inspection Procedure 8: Customization settings cannot be changed.
 
 
cautionBefore replacing the ECU, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.
 
 
COMMENTS ON TROUBLE SYMPTOM
When customization settings cannot be changed, the CAN bus lines, the ETACS-ECU or the EV remote-ECU may be defective.
 
 
TECHNICAL DESCRIPTION (COMMENT)
  • The CAN bus line may be defective
  • The ETACS-ECU may be defective
  • The EV remote-ECU may be defective
 
 
DIAGNOSIS
STEP 1. Using scan tool (M.U.T.-IIISE), diagnose the CAN bus line.
(1)
cautionTo prevent damage to scan tool (M.U.T.-IIISE), always turn off the power supply mode of the electric motor switch before connecting or disconnecting scan tool (M.U.T.-IIISE).
Connect scan tool (M.U.T.-IIISE). Refer to "How to connect the Scan Tool (M.U.T.-IIISE) ."
(2) Press the electric motor switch to turn on the power supply mode.
(3) Diagnose the CAN bus line.
(4) Press the electric motor switch to turn off the power supply mode.
Is the CAN bus line found to be normal?
Go to Step 2.
Repair the CAN bus lines (Refer to GROUP 54C - Troubleshooting ).
 
STEP 2. Using scan tool (M.U.T.-IIISE), check the DTC.
Check if DTC is set in the EV remote-ECU.
Is the DTC set?
Troubleshoot the EV remote-ECU (Refer to ).
Go to Step 3.
 
STEP 3. Customize the ETACS.
Use the scan tool (M.U.T.-IIISE) to check whether customized items are displayed correctly.
Are the customized items displayed correctly?
Go to Step 4.
Replace the ETACS-ECU (Refer to ).
 
STEP 4. Retest the system.
Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).
: Replace the EV remote-ECU (Refer to ).