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Inspection Procedure 10: Keyless entry hazard answer back function does not work normally.
 
 
cautionBefore replacing the ECU, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.
 
 
 
 
OPERATION
When the keyless entry function is used, the keyless entry hazard answer back function operate as set by ETACS customization function (If the flashing count is set to 0 with a customization function, no answer back function is performed).
 
 
PROBABLE CAUSES
  • Function setting error or no setting with a customization
  • Malfunction of the turn signal light
  • Malfunction of ETACS-ECU
 
 
DIAGNOSIS
STEP 1. Check the hazard warning light
Check that the hazard warning light illuminate normally.
Is the check result normal?
Go to Step 2.
Refer to GROUP 54A - Hazard Warning Light Switch .
 
STEP 2. Check the keyless entry function operation
Check that the keyless entry function operation normally.
Is the check result normal?
Go to Step 3.
Refer to Inspection Procedure 8: Keyless entry function does not work .
 
STEP 3. Check the customization
Check that any one of the followings other than "Lock: 0, Unlock: 0" is set for Hazard answer back with a customization function.
  • Lock: 1, Unlock: 2
  • Lock: 1, Unlock: 0
  • Lock: 0, Unlock: 2
  • Lock: 2, Unlock: 1
  • Lock: 2, Unlock: 0
  • Lock: 0, Unlock: 1
  • Lock: 0, Unlock: 0
noteIf "Lock: 0" or "Unlock: 0" is selected, no answer back function is performed on locking or unlocking.
Is it set to other than "Lock: 0, Unlock: 0"?
Go to Step 4.
Set Hazard answer back to any one other than "Lock: 0, Unlock: 0" with a customization function (Refer to ).
 
STEP 4. Using scan tool (M.U.T.-IIISE), check the DTC.
Check if any DTC is set in the KOS&OSS-ECU.
Is the DTC set?
Refer to diagnostic trouble code chart .
Go to Step 5.
 
STEP 5. Using scan tool (M.U.T.-IIISE), check the other system DTC.
Check if any DTC is set in the ETACS-ECU.
Is the DTC set?
Perform troubleshooting for the ETACS (Refer to GROUP 54A - ETACS - Diagnosis ).
Go to Step 6.
 
STEP 6. Check of the troubles
Check that the hazard answer back function of the keyless entry operate.
Is the check result normal?
Intermittent malfunction is suspected (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).
Replace ETACS-ECU (Refer to GROUP 54A - ETACS - ETACS-ECU ).