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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-6

Inspection Procedure B-6




INSPECTION PROCEDURE B-6: Tone Alarm: Turn-signal Light Buzzer Function does not Work Normally.

NOTE:
This troubleshooting procedure requires 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 controls the turn-signal light buzzer function, based on the switch signals below:

- Turn-signal light switch: ON
- Hazard switch: ON

TECHNICAL DESCRIPTION (COMMENT)

If the turn-signal light buzzer function does not work normally, connector(s), wiring harness, the column switch, the ETACS-ECU or the input signal circuit 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 adjustment function.

Q. Has the turn-signal light buzzer function been enabled by the adjustment function?

YES Go to Step 2.
NO Enable the turn-signal light buzzer function.
STEP 2. Check whether the turn-signal lights illuminate.

When the turn-signal light switch or the hazard warning light switch is operated, check that the turn-signal lights flash.

Q. Are the turn-signal lights in good condition?

YES Go to Step 3.
NO First, repair the turn-signal light(s). Refer to Inspection Procedure I-3 "One of the turn-signal lights does not illuminate Inspection Procedure I-3."
STEP 3. Use scan tool MB991958 to select "ECU COMM Check" on the SWS monitor display.

Check the following ECUs:

- ETACS-ECU
- Column-ECU









(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 special tool MB991910 before connecting special tool MB991812. Be sure to connect special tool MB991806 after turning on special tool MB991824.

Connect the special tool. 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."
1. Select "Interactive Diagnosis."

2. Select "System Select."

3. Select "SWS."

4. Select "SWS MONITOR."

5. Select "ECU COMM Check."

(4)Scan
tool MB991958 should show "OK" on the "ECU COMM Check" menus for both the
"ETACS ECU" and the "COLUMN ECU" menus.

Q. Is "OK" displayed for both the "ETACS ECU" and "COLUMN ECU" menus?

"OK" is displayed for all the items : Go to Step 4.

"NG" is displayed for the "COLUMN ECU" menu : Refer to Inspection Procedure A-2 "Communication with the column switch (column-ECU) is not possible Inspection Procedure A-2."

"NG" is displayed for the "ETACS ECU" menu : Refer to Inspection Procedure A-3 "Communication with the ETACS-ECU is not possible Inspection Procedure A-3."

"NG" is displayed for all the items : Refer to Inspection Procedure A-3 "Communication with the ETACS-ECU is not possible Inspection Procedure A-3."

STEP 4. Check the input signal by using "FUNCTION DIAG." menu of the SWS monitor.









Check the input signals from the following switches:

- Ignition switch: ON
- Driver's door: Open
- All door: Closed
(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:
The scan tool MB991958 display changes when the driver's or the front passenger's door is opened. If any of the doors is open, the system cannot be checked correctly.





Q. Does scan tool MB991958 display the items "IG SW (IG1)" and "BUZZER" as normal condition?

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.
Check that the turn-signal light buzzer 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.
Check that the turn-signal light buzzer function works normally.

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