Inspection Procedure 11: Keyless entry function does not work: Diagnosis

WARNING: This page is about a different car, the 2014 Mitsubishi Outlander. However, it is still accessible from the selected car via links, so may be relevant.

STEP 1. ETACS-ECU coding data check
1. Using scan tool (M.U.T.-III) to read out the option coding information in ETACS-ECU (Refer to CODING REFERENCE TABLE ).
2. Check if the "Keyless function" is "Enabled."
Q: Is the check result normal?
1. YES: Go to Step 2.
2. NO: Operate the using scan tool (M.U.T.-III) to set the option coding "keyless" to "enabled", and check the trouble symptom.
STEP 2. Using scan tool (M.U.T.-III), diagnose the CAN bus line.
CAUTION: To prevent damage to scan tool (M.U.T.-III), always turn the power supply mode of the engine switch to the OFF position before connecting or disconnecting scan tool (M.U.T.-III).
1. Connect scan tool (M.U.T.-III). Refer to "HOW TO CONNECT SCAN TOOL (M.U.T.-III) ."
2. Turn the power supply mode of the engine switch to ON.
3. Diagnose the CAN bus line.
4. Turn the power supply mode of the engine switch to OFF.
Q: Is the CAN bus line found to be normal?
1. YES: Go to Step 3.
2. NO: Repair the CAN bus line (Refer to DIAGNOSIS ).
STEP 3. Using scan tool (M.U.T.-III), read the diagnostic trouble code.
Check if any DTC is stored in the KOS-ECU.

CAUTION: To prevent damage to scan tool (M.U.T.-III), always turn the power supply mode of the engine switch to the OFF position before connecting or disconnecting scan tool (M.U.T.-III).
1. Connect scan tool (M.U.T.-III). Refer to "HOW TO CONNECT SCAN TOOL (M.U.T.-III) ."
2. Turn the power supply mode of the engine switch to ON.
3. Check if DTC is stored.
4. Turn the power supply mode of the engine switch to OFF.
Q: Is the DTC stored?
1. YES: Refer to DIAGNOSTIC TROUBLE CODE CHART .
2. NO: Go to Step 4.
STEP 4. Check the power supply system
With the engine switch in the LOCK (OFF) position, check if the following function operates normally:
- Hazard warning light
Q: Is the check result normal?
1. YES: Go to Step 5.
2. NO: Refer to MALFUNCTION OF ETACS-ECU POWER SUPPLY CIRCUIT .
STEP 5. Check the operation of the central door locking system.
Check that the central door locking system works normally.

Q: Is the check result normal?
1. YES: Go to Step 6.
2. NO: Refer to STANDARD FLOW OF DIAGNOSTIC TROUBLESHOOTING .

STEP 6. Using scan tool (M.U.T.-III), check data list.

Check the signals related to the keyless entry function operation.

CAUTION: To prevent damage to scan tool (M.U.T.-III), always turn the power supply mode of the engine switch to the OFF position before connecting or disconnecting scan tool (M.U.T.-III).

Connect scan tool (M.U.T.-III). Refer to "HOW TO CONNECT THE SCAN TOOL (M.U.T.-III) ."
Turn the power supply mode of the engine switch to OFF.

Check the ETACS data list.

Turn the power supply mode of engine switch to LOCK (OFF).
Close the driver's door.
Close the front passenger's doors.
Close the RH-side rear door.
Close the LH-side rear door.

Close the liftgate.

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	Gate ajar switch	Close

OK: Normal conditions are displayed for all the items.

Q: Are the check result normal?

Normal conditions are displayed for all the items.: Go to Step 7.

Normal condition is not displayed for item No. 256.: Refer to INSPECTION PROCEDURE 5: "FRONT DOOR SWITCH (DRIVER'S SIDE) SIGNAL IS NOT RECEIVED ."

Normal condition is not displayed for item No. 257.: Refer to INSPECTION PROCEDURE 6: "FRONT DOOR SWITCH (PASSENGER'S SIDE) SIGNAL IS NOT RECEIVED ."

Normal condition is not displayed for item No. 258.: Refer to INSPECTION PROCEDURE 7: "REAR DOOR SWITCH (RH) SIGNAL IS NOT RECEIVED ."

Normal condition is not displayed for item No. 259.: Refer to INSPECTION PROCEDURE 8: REAR DOOR SWITCH (LH) SIGNAL IS NOT RECEIVED .

Normal condition is not displayed for item No. 260.: Refer to INSPECTION PROCEDURE 9: "LIFTGATE LATCH SIGNAL IS NOT RECEIVED ."

STEP 7. 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?
1. YES: Replace the keyless operation key concerned and register the ID codes (Refer to ON-VEHICLE SERVICE < KOS-ECU > ).
2. NO: Go to Step 8.
STEP 8. Check of the troubles
Replace ETACS-ECU. After the replacement, perform the coding, and check that the keyless entry function operates normally.

Q: Is the check result normal?
1. YES: Intermittent malfunction is suspected (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION ).
2. NO: Replace KOS-ECU and register the ID codes (Refer to ON-VEHICLE SERVICE < KOS-ECU > ).