[Previous][Next]
Inspection Procedure 14: Outer tone alarm does not sound.
 
 
cautionBefore replacing the ECU, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.
 
 
TECHNICAL DESCRIPTION (COMMENT)
The outer tone alarm sounds under the following conditions.
  • When the door is locked or unlocked with the keyless or keyless operation function
  • Door lock does not operate.
  • The keyless operation key is brought out of the vehicle.
  • Also, with a customization function, "Tone alarm answerback" may be set to "Not Sound Tone alarm."
 
 
TROUBLESHOOTING HINTS
  • Malfunction of the outer tone alarm
  • Malfunction of the KOS-ECU
  • Malfunction of the connector
  • Function setting error or no setting with a customization
 
 
DIAGNOSIS
STEP 1. 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 2.
 
STEP 2. Check the customization
Check that either of the followings other than "Not sound tone alarm" is set for "Tone alarm answer back" with the customization function.
  • At F.A.S.T.
  • At keyless
  • At Both
Is the check result normal?
Go to Step 3.
Set either of the followings other than "Tone alarm answer back" with the customization function (Refer to ).
 
STEP 3. Using scan tool (M.U.T.-IIISE), read the actuator test.
(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 that the outer tone alarm sounds (Refer to ).
(4) Turn the power supply mode of the electric motor switch to OFF.
Is the DTC set?
Go to Step 5.
Replace the outer tone alarm (Refer to ). Go to Step 4.
 
STEP 4. Check of short to power supply, short to ground, and open circuit in DRVB, PWRB line between the KOS-ECU connector and the outer tone alarm connector.
noteBefore the wiring harness check, check the intermediate connector, and repair if necessary.
Is the check result normal?
Go to Step 5.
Repair the wiring harness.
 
STEP 5. Check of the troubles
Check that the outer tone alarm sounds when the outer tone alarm sounding conditions are met.
Is the check result normal?
Intermittent malfunction is suspected (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Deal with Intermittent Malfunction ).
Replace KOS-ECU and register the ID codes (Refer to ).