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Inspection Procedure 13: Keyless entry hazard answerback function or the dome light answerback function does not work normally.
 
 
cautionBefore replacing the ECU, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.
 
 
TECHNICAL DESCRIPTION (COMMENT)
When the keyless entry function is used, the keyless entry hazard answerback function or dome light answerback function operate as set by ETACS customization function (If the flashing count is set to 0 with a customization function, no answerback function is performed).
 
 
TROUBLESHOOTING HINTS
  • Function setting error or no setting with a customization
  • Malfunction of the turn signal light
  • Malfunction of the dome 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 - The hazard warning lights do not illuminate .
 
STEP 2. Check the dome lights operation
Check that the dome lights illuminate normally.
Is the check result normal?
Go to Step 3.
Refer to GROUP 54A, Dome Light - Inspection Procedure 1: "The front dome light does not illuminate normally ."
 
STEP 3. Check the keyless entry function operation
Check that the keyless entry function operation normally.
Is the check result normal?
Go to Step 4.
Refer to Inspection Procedure 11: "Keyless entry function does not work ."
 
STEP 4. Check the customization
Check that any one of the followings other than "Lock: 0, Unlock: 0" is set for "Hazard answerback" with a customization function.
  • Lock: 1, Unlock: 2
  • Lock: 1, Unlock: 0
  • Lock: 0, Unlock: 2
  • Lock: 2, Unlock: 1
  • Lock: 0, Unlock: 1
  • Lock: 2, Unlock: 0
noteIf "Lock: 0" or "Unlock: 0" is selected, no answerback function is performed on locking or unlocking.
Is it set to other than "Lock: 0, Unlock: 0"?
Go to Step 5.
Set "Hazard answerback" to any one other than "Lock: 0, Unlock: 0" with a customization function (Refer to ).
 
STEP 5. Using scan tool (M.U.T.-IIISE), read the diagnostic trouble code.
Check if any DTC is set in the KOS-ECU.
(1)
cautionTo prevent damage to scan tool (M.U.T.-IIISE), always turn the power supply mode of the electric motor switch to the OFF before connecting or disconnecting scan tool (M.U.T.-IIISE).
Connect scan tool (M.U.T.-IIISE). Refer to "How to connect scan tool (M.U.T.-IIISE) ."
(2) Turn the power supply mode of the electric motor switch to ON.
(3) Check if DTC is set.
(4) Turn the power supply mode of the electric motor switch to OFF.
Is the DTC set?
Refer to diagnostic trouble code chart .
Go to Step 6.
 
STEP 6. Check of the troubles
Check that the hazard answerback and dome light answerback functions 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 GROUP54A, ETACS - ETACS-ECU ). After the replacement, perform the coding.