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Inspection Procedure 15: Keyless entry system does not work Mitsubishi Lancer Evolution X

Keyless Operation System (kos) - Except Lancer Evolution 1 illustration ~1076 words

Inspection Procedure 15: Keyless entry system does not work

CAUTIONBefore replacing the ECU, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.

Scheme 56

Scheme 56
Scheme 56

The receiver antenna module receives lock and unlock signals from the keyless operation key, and sends them to KOS-ECU, and further to ETACS-ECU. Also, when ETACS receives signals from the key reminder switch and all the door switches, ETACS-ECU judges them to activate the keyless entry system.

  1. Malfunction of CAN bus line
  2. Malfunction of the door switches
  3. Malfunction of the liftgate switch < LANCER SPORTBACK >
  4. Malfunction of the key reminder switch
  5. Malfunction of the receiver antenna module
  6. Malfunction of the keyless operation key
  7. Damaged wiring harness and connectors
  8. Malfunction of the KOS-ECU
  9. Malfunction of ETACS-ECU

Required Special Tools

  1. MB992006: Extra fine probe
  2. MB991223: Harness set
  3. MB991958 Scan Tool (M.U.T.-III Sub Assembly) MB991824: Vehicles Communication Interface (V.C.I.) MB991827 M.U.T.-III USB Cable MB991910 M.U.T.-III Main Harness A
  1. STEP 1. Using scan tool MB991958, read CAN bus 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. Connect scan tool MB991958. Refer to " «HOW TO CONNECT SCAN TOOL (M.U.T.-III)»(/mitsubishi/lancer-evolution/x-2007-2016/remont/door-locks-anti-theft-systems/#keyless-operation-system-kos-except-lancer-evolution__how-to-connect-the-scan-tool) ." Turn the ignition switch to the "ON" position. Check whether the CAN bus lines related DTC is set. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the DTC set? YES: Repair the CAN bus line (Refer to «CAN BUS DIAGNOSTICS TABLE»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__can-bus-diagnostics-table) ). NO: Go to Step 2.
  2. 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. Connect scan tool MB991958. Refer to " «HOW TO CONNECT SCAN TOOL (M.U.T.-III)»(/mitsubishi/lancer-evolution/x-2007-2016/remont/door-locks-anti-theft-systems/#keyless-operation-system-kos-except-lancer-evolution__how-to-connect-the-scan-tool) ." Turn the ignition switch to the "ON" position. Check whether the KOS-ECU related DTC is set. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the DTC set? YES: Diagnose the KOS-ECU. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(/mitsubishi/lancer-evolution/x-2007-2016/remont/door-locks-anti-theft-systems/#keyless-operation-system-kos-except-lancer-evolution__diagnostic-trouble-code-chart) . NO: Go to Step 3.
  3. STEP 3. Check the power supply system With the ignition switch in the LOCK (OFF) position, check if the following function operates normally: Headlights Hazard warning light Q: Is the check result normal? YES: Go to Step 4. NO: Refer to «MALFUNCTION OF ETACS-ECU POWER SUPPLY CIRCUIT»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#electronic-time-and-alarm-control-system-etacs-except-lancer-evolution) .
  4. STEP 4. Verify the central door locking system. Check that the central door locking system works normally. Q: Is the check result normal? YES: Go to Step 5. NO: Refer to «TROUBLESHOOTING»(/mitsubishi/lancer-evolution/x-2007-2016/remont/door-locks-anti-theft-systems/#door-system-except-lancer-evolution__trouble-symptom-chart) .
  5. STEP 5. Using scan tool MB991958, check data list. Check the signals related to the keyless entry system operation. 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. Connect scan tool MB991958. Refer to " «HOW TO CONNECT THE SCAN TOOL (M.U.T.-III)»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#wireless-control-module-wcm-except-lancer-evolution__how-to-connect-the-scan-tool) ." Turn the ignition switch to the "LOCK" (OFF) position. Check the ETACS data list. Close the driver's door. Close the passenger's door. Close the RH-side rear door. Close the LH-side rear door. Close the liftgate < LANCER SPORTBACK >. Remove the ignition key from the ignition key cylinder. ITEM NORMAL CONDITION CHART Item No. Item name Normal condition Item 256 Dr door ajar switch Close Item 257 As door ajar switch Close Item 258 RR door ajar switch Close Item 259 RL door ajar switch Close Item 260 Trunk/gate trunk ajar switch Close Item 264 Handle lock switch Key in --> Key out OK: Normal condition are displayed. Q: Are the check result normal? YES < Normal conditions are displayed for all the items. >: Go to Step 6. NO < Normal condition is not displayed for item No. 256. >: Refer to «INSPECTION PROCEDURE 5: ETACS-ECU DOES NOT RECEIVE ANY SIGNAL FROM THE FRONT DOOR SWITCH (LH)»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#electronic-time-and-alarm-control-system-etacs-except-lancer-evolution) . NO < Normal condition is not displayed for item No. 257. >: Refer to «INSPECTION PROCEDURE 6: ETACS-ECU DOES NOT RECEIVE ANY SIGNAL FROM THE FRONT DOOR SWITCH (RH)»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#electronic-time-and-alarm-control-system-etacs-except-lancer-evolution) . NO < Normal condition is not displayed for item No. 258. >: Refer to «INSPECTION PROCEDURE 8: ETACS-ECU DOES NOT RECEIVE ANY SIGNAL FROM THE REAR DOOR SWITCH (RH)»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#electronic-time-and-alarm-control-system-etacs-except-lancer-evolution) . NO < Normal condition is not displayed for item No. 259. >: Refer to «INSPECTION PROCEDURE 7: ETACS-ECU DOES NOT RECEIVE ANY SIGNAL FROM THE REAR DOOR SWITCH (LH)»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#electronic-time-and-alarm-control-system-etacs-except-lancer-evolution) . NO < Normal condition is not displayed for item No. 260 (LANCER SPORTBACK). >: Refer to «INSPECTION PROCEDURE 10: ETACS-ECU DOES NOT RECEIVE ANY SIGNAL FROM THE LIFTGATE SWITCH»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#electronic-time-and-alarm-control-system-etacs-except-lancer-evolution) . NO < Normal condition is not displayed for item No. 264. >: Refer to «INSPECTION PROCEDURE 3: ETACS-ECU DOES NOT RECEIVE ANY SIGNAL FROM THE KEY REMINDER SWITCH»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#electronic-time-and-alarm-control-system-etacs-except-lancer-evolution) .
  6. STEP 6. Check KOS-ECU connector C-31 and receiver antenna module connector C-10 for loose, corroded or damaged terminals, or terminals pushed back in the connector. Q: Are KOS-ECU connector C-31 and receiver antenna module connector C-10 in good condition? YES: Go to Step 7. NO: Repair or replace the damaged component(s). Refer to «HARNESS CONNECTOR INSPECTION»(/mitsubishi/lancer-evolution/x-2007-2016/remont/body-electrical/#general-electrical-except-lancer-evolution) . Check that the keyless entry system works normally.
  7. STEP 7. Check the wiring harness between KOS-ECU connector C-31 (terminal Nos. 9, 10 and 13) and receiver antenna module connector C-10 (terminal Nos. 3, 4 and 5). Check the communication and ground lines for open circuit or short circuit. Q: Are the wiring harness between KOS-ECU connector C-31 (terminal Nos. 9, 10 and 13) and receiver antenna module connector C-10 (terminal Nos. 3, 4 and 5) in good condition? YES: Go to Step 8. 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 keyless entry system works normally.
  8. STEP 8. Check with another registered keyless operation key. Check that the keyless entry function can be used with another keyless operation key. Q: Can the keyless entry function be used? YES: Replace the keyless operation key concerned and register the ID codes (Refer to «ID CODES REGISTRATION JUDGMENT TABLE»(/mitsubishi/lancer-evolution/x-2007-2016/remont/door-locks-anti-theft-systems/#keyless-operation-system-kos-except-lancer-evolution__id-codes-registration-judgment-table) ). NO: Go to Step 9.
  9. STEP 9. Check of the troubles Replace ETACS-ECU. After the replacement, perform the coding, and check that the keyless entry system operates normally. Q: Is the check result normal? YES: The diagnosis is complete. NO: Replace KOS-ECU and register the ID codes (Refer to «ID CODES REGISTRATION JUDGMENT TABLE»(/mitsubishi/lancer-evolution/x-2007-2016/remont/door-locks-anti-theft-systems/#keyless-operation-system-kos-except-lancer-evolution__id-codes-registration-judgment-table) ).