FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
Courtesy of Operation CHARM: Car repair manuals for everyone.
Home >> Mitsubishi >> 2012 >> Galant L4-2.4L (4G69) >> Repair and Diagnosis >> Body and Frame >> Body Control Systems >> Testing and Inspection >> Symptom Related Diagnostic Procedures >> Tone Alarm >> Inspection Procedure B-5

Inspection Procedure B-5




INSPECTION PROCEDURE B-5: Tone Alarm: The multi-center display (Mitsubishi Multi Communication system) does not sound normally when it is operated.

NOTE:
This troubleshooting procedure requires the use of scan tool MB991958 and SWS monitor kit MB991813. For details on how to use the SWS monitor, refer to "How to use SWS monitor How to Use SWS Monitor."






CIRCUIT OPERATION

The ETACS-ECU sounds the buzzer when it receives buzzer signal from the multi-center display (Mitsubishi multi communication system).

TECHNICAL DESCRIPTION (COMMENT)

If this function does not work normally, connector(s), wiring harness in the CAN bus lines, the multi-center display unit or the ETACS-ECU may be defective.

TROUBLESHOOTING HINTS

- Trouble in input signal system
- The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector
- The ETACS-ECU may be defective

DIAGNOSIS

Required Special Tools:

- MB991223: Harness Set
- MB992006: Extra Fine Probe
- MB991958: Scan Tool (M.U.T.-III Sub Assembly)
- MB991824: V.C.I.
- MB991827: M.U.T.-III USB Cable
- MB991910: M.U.T.-III Main Harness A
- MB991813: SWS Monitor Kit
- MB991806: SWS Monitor Cartridge
- MB991812: SWS Monitor Harness (For Column-ECU)
- MB991822: Probe Harness

STEP 1. Check the operation of the multi-center display.

Q. Does the multi-center display work normally?

YES Go to Step 2.
NO First, replace the multi-center display unit.
STEP 2. Using scan tool MB991958, diagnose the CAN bus line.





(1)
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 SWS monitor How to Connect SWS Monitor."

(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 3.

NO Repair the CAN bus line CAN Bus Diagnostics Chart).

STEP 3. Using scan tool MB991958, read the multi-center display diagnostic trouble code.

Check that a multi-center display DTC is set.

(1)Turn the ignition switch to the "ON" position.

(2)Check if the multi-center display DTC is set.

(3)Turn the ignition switch to the "LOCK" (OFF) position.

Q. Is the DTC set?

YES Diagnose the multi-center display unit Mitsubishi Multi Communication System (MMCS)).
NO Go to Step 4.
STEP 4. Use scan tool MB991958 to select "ECU COMM Check" on the SWS monitor display.

Check the ETACS-ECU.









(1)
CAUTION:
Connect special tool MB991910 before connecting special tool MB991812.
Be sure to connect special tool MB991806 after turning on special tool MB991824.

Connect the SWS monitor. Refer to "How to connect SWS monitor How to Connect SWS Monitor."

(2)Turn the ignition switch to the "ON" position.
(3)Operate scan tool MB991958 according to the procedure below to display "ECU COMM Check."

.....Select "Interactive Diagnosis."

.....Select "System Select."

.....Select "SWS."

.....Select "SWS MONITOR."

.....Select "ECU COMM Check."

(4)Scan tool MB991958 should show "OK" on the "ECU COMM Check" menu for the "ETACS ECU" menu.

Q. Is "OK" displayed for the "ETACS ECU" menu?

YES Go to Step 5.

NO Refer to Inspection Procedure A-3 "Communication with the ETACS-ECU is not possible Inspection Procedure A-3."

STEP 5. Check the input signal by using "FUNCTION DIAG." menu of the SWS monitor.

Turn the ignition switch to the "ON" position to check the input signals from the following switches.









(1)Operate scan tool MB991958 according to the procedure below to display "OTHER ALARM."

.....Select "Interactive Diagnosis."

.....Select "System Select."

.....Select "SWS."

.....Select "SWS MONITOR."

.....Select "Function Diag."

.....Select "BUZZER."

.....Select "OTHER ALARM."

(2)Check that normal conditions are displayed for the items described in the table below.
NOTE:
If the function switch of the multi-center display is operated, check that No.43 "BUZZER"
is displayed as normal condition.





Q. Are normal conditions displayed for the "IG SW (IG1)" and "BUZZER"?

Normal conditions are displayed for all the items : Replace the ETACS-ECU. When the ETACS-ECU is replaced, register the encrypted code. Encrypted Code Registration Criteria Table.
Verify that the multi-center display operating sound function works normally.

Normal condition is not displayed for "IG SW (IG1)" : Refer to Inspection Procedure M-2 "ETACS-ECU does not receive any signal from the ignition switch (IG1) Inspection Procedure M-2."

Normal condition is not displayed for "BUZZER" : Replace the ETACS-ECU. When the ETACS-ECU is replaced, register the encrypted code. Encrypted Code Registration Criteria Table.
Verify that the multi-center display operating sound function works normally.

pro multis Credits:Operation CHARM About Operation CHARM