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Home >> Mitsubishi >> 2010 >> Lancer Evolution L4-2.0L Turbo (4B11T/C) >> Repair and Diagnosis >> Instrument Panel, Gauges and Warning Indicators >> Instrument Cluster / Carrier >> Testing and Inspection >> Symptom Related Diagnostic Procedures >> Symptom Diagnostic Procedures >> Inspection Procedure 4

Inspection Procedure 4

Inspection Procedure 4: Tone Alarm Does Not Sound Normally.

CAUTION: Before replacing the combination meter, be sure to check that the power supply circuit, ground circuit, and communication circuit are normal.

TECHNICAL DESCRIPTION (COMMENT)
When the following signals are received via the CAN communication, the combination meter sounds the incorporated tone alarm according to the each pattern.

Seat belt reminder function
- Ignition switch ON signal
- Vehicle speed signal
- Driver's seat belt switch signal
- Front passenger's seat belt switch signal

Keyless operation key reminder tone alarm function (vehicles with KOS)
- Ignition switch OFF signal
- IG knob push switch ON signal
- Driver's door switch ON signal

Ignition key reminder tone alarm function (vehicles without KOS)
- Ignition switch OFF signal
- Key reminder switch OFF signal
- Driver's door switch ON signal

Light reminder tone alarm function
- Ignition switch OFF signal
- Lighting switch ON signal
- Driver's door switch ON signal

Door-ajar warning tone alarm function
- Ignition switch ON signal
- Any door switch or trunk lid latch ON signal
- Vehicle speed signal

Freeze warning tone alarm
- Ignition switch ON signal
- Ambient temperature signal

Parking brake reminder tone alarm function
- Ignition switch ON signal
- Parking brake switch ON signal
- Vehicle speed signal

Multi information display interrupt display tone alarm
- Display condition signal of information display from each warning (When there is a fixed tone alarm sounding pattern for each warning, that pattern has the priority.)

Meter information meter switch operation tone alarm
- ON signal for combination meter information meter switch

Turn-signal light tone alarm function
- Turn-signal light switch ON signal

Paddle shift cancel tone alarm, Theft-alarm function, ETACS-ECU function customize tone alarm, A/C operation tone alarm, audio operation tone alarm
- Sounding request signal from the ETACS-ECU If the tone alarm does not sound normally, the connector(s) and wiring harness in the CAN bus lines, or each ECU or the combination meter may have a problem.

TROUBLESHOOTING HINTS
- The combination meter may be defective
- The each ECU may be defective

DIAGNOSIS

Required Special Tools:
- MB991958: Scan Tool (M.U.T.-III Sub Assembly)
- MB991824: Vehicle Communication Interface (V.C.I.)
- MB991827: M.U.T.-III USB Cable
- MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)

STEP 1. Using scan tool MB991958, diagnose the CAN bus line.







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 the Scan Tool (M.U.T.-III)." How to Connect the Scan Tool (M.U.T.-III)
2. Turn the ignition switch to the "ON" position.
3. Diagnose the CAN bus line.
4. Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is the CAN bus line found to be normal?

YES : Go to Step 2.

NO : Repair the CAN bus line.

STEP 2. Using scan tool MB991958, read the combination meter diagnostic trouble code.

Check if DTC is set to the combination meter.

Q: Is the DTC set?

YES : Troubleshoot the combination meter. Diagnostic Trouble Code Descriptions

NO : Go to Step 3.

STEP 3. Using scan tool MB991958, read for any diagnostic trouble code.

Check if diagnostic trouble code is set to the engine control module, TC-SST-ECU, ASC-ECU, ETACS-ECU, WCM, KOS-ECU, audio and A/C-ECU.

Q: Is the DTC set to the any of the above?

YES [Set to the engine control module.] : Troubleshoot the engine control module (Refer to Diagnosis). Diagnostic Trouble Code Descriptions

YES [Set to the TC-SST-ECU.] : Troubleshoot the TC-SST (Refer to Diagnosis). Diagnostic Trouble Code Descriptions

YES [Set to the ASC-ECU.] : Troubleshoot the ASC (Refer to Diagnosis). Diagnostic Trouble Code Descriptions

YES [Set to the ETACS.] : Troubleshoot the ETACS. Diagnostic Trouble Code Descriptions

YES [Set to the WCM.] : Troubleshoot the WCM (Refer to wireless control module, diagnosis). Diagnostic Trouble Code Descriptions

YES [Set to the KOS.] Troubleshoot the KOS (Refer to keyless operation system (KOS), Diagnosis). Diagnostic Trouble Code Descriptions

YES [Set to the audio.] : Troubleshoot the audio. Diagnostic Trouble Code Descriptions

YES [Set to the A/C.] : Troubleshoot the A/C (Refer to Auto A/C Diagnosis). Diagnostic Trouble Code Descriptions

NO [The diagnostic trouble code is not set.] : Go to Step 4.

STEP 4. Check by scan tool MB991958 "Special Function"

Using scan tool MB991958, select "Test" from the special function of the combination meter. Execute the following item to check the tone alarm.
- Item 3: Buzzer(AUTO)

Q: Is the check result normal?

YES : Go to Step 5.

NO : Replace the combination meter.

STEP 5. Retest the system

Check that the tone alarm normally.

Q: Is the check result normal?

YES : The trouble can be an intermittent malfunction.

NO : Replace the combination meter.
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