Inspection Procedure 18: Outer tone alarm does not sound: Diagnosis

WARNING: This page is about a different variant/trim than selected.

STEP 1. Check the customize function.
Check that either of the followings other than "Not sound tone alarm" is set for "Tone alarm answer back" with the customization function.
- At keyless
- At F.A.S.T.
- At Both
  Q: Is the check result normal?
  1. YES: Go to Step 2.
  2. NO: Set either of the followings other than "Tone alarm answer back" with the customization function (Refer to CUSTOMIZATION FUNCTION ).
STEP 2. Using scan tool MB991958, read the diagnostic trouble code.
CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
1. Connect scan tool MB991958. Refer to "HOW TO CONNECT SCAN TOOL (M.U.T.-III) ."
2. Turn the ignition switch to the "ON" position.
3. Check whether the KOS-ECU related DTC is set.
4. Turn the ignition switch to the "LOCK" (OFF) position.
  Q: Is the DTC set?
  1. YES: Diagnose the KOS-ECU. Refer to DIAGNOSTIC TROUBLE CODE CHART .
  2. NO: Go to Step 3.
    
    Fig 1: Connecting Special Tool To Data Link Connector
    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
STEP 3. Using scan tool MB991958, read the actuator test.
CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
1. Connect scan tool MB991958. Refer to "HOW TO CONNECT SCAN TOOL (M.U.T.-III) ."
2. Turn the ignition switch to the "ON" position.
3. Check that the outer tone alarm sounds (Refer to ACTUATOR TEST TABLE ).
4. Turn the ignition switch to the "LOCK" (OFF) position.
  Q: Is the DTC set?
  1. YES: Go to Step 6.
  2. NO: Go to Step 4.
    
    Fig 2: Connecting Special Tool To Data Link Connector
    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
STEP 4. Check KOS-ECU connector C-05 and outer tone alarm connector F-21 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Are KOS-ECU connector C-05 and outer tone alarm connector F-21 in good condition?
1. YES: Go to Step 5.
2. NO: Repair or replace the damaged component(s). Refer to HARNESS CONNECTOR INSPECTION . Check that the outer tone alarm works normally.
STEP 5. Check the wiring harness between KOS-ECU connector C-05 (terminal Nos. 35 and 37) and outer tone alarm connector F-21 (terminal Nos. 1 and 2).
- Check the power supply and ground lines for open circuit.
  NOTE: Also check intermediate connectors C-42, D-17 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connectors C-42, D-17 is damaged, repair or replace the damaged component(s) as described in HARNESS CONNECTOR INSPECTION .
  
  Q: Are the wiring harness between KOS-ECU connector C-05 (terminal Nos. 35 and 37) and outer tone alarm connector F-21 (terminal Nos. 1 and 2) in good condition?
  1. YES: Go to Step 6.
  2. NO: The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary. Check that the outer tone alarm works normally.
STEP 6. Check of the troubles
Check that the outer tone alarm sounds when the outer tone alarm sounding conditions are met.

Q: Is the check result normal?
1. YES: The diagnosis is complete.
2. NO: Replace KOS-ECU and register the ID codes (Refer to ID CODES REGISTRATION JUDGMENT TABLE ).