Mitsubishi Evolution X. Manual - part 976

HAZARD WARNING LIGHT SWITCH

TSB Revision

CHASSIS ELECTRICAL

54A-265

DIAGNOSTIC TROUBLE CODE CHART

M1541500200025

CAUTION

On troubleshooting, if the ignition switch is 
turned ON while disconnecting connector(s), 
diagnostic trouble code(s) associated with other 
system may be set. On completion, confirm all 
systems for diagnostic trouble code(s). If diag-
nostic trouble code(s) are set, erase them all.

DIAGNOSTIC TROUBLE CODE PROCEDURES

DTC B16A6: Turn-signal fuse blown

.

TROUBLE JUDGEMENT

When the hazard warning light fuse is blown, the 
ETACS-ECU sets the DTC B16A6.

.

TECHNICAL DESCRIPTION (COMMENT)

With the DTC not set, when the blown fuse of hazard 
warning light is detected three times consecutively, 
the ETACS-ECU sets the DTC B16A3.

.

TROUBLESHOOTING HINTS

• The wiring harness or connectors may have 

loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector

• Malfunction of the ETACS-ECU

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. Fuse check
Check if the turn-signal light fuse is normal.
Q: Is the check result normal?

YES : Go to Step 2.
NO :  Replace the turn-signal light fuse.

Diagnostic trouble code No.

Diagnostic item

Reference page

B16A6

Turn-signal fuse blown

P.54A-265

HAZARD WARNING LIGHT SWITCH

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CHASSIS ELECTRICAL

54A-266

STEP 2. Using scan tool MB991958, Check whether the 
diagnostic trouble code is reset.

CAUTION

To prevent damage to scan tool MB991958, always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958. Refer to "How to connect 

scan tool 

P.54A-263

."

(2) Turn the ignition switch to the "ON" position.
(3) Erase the DTC.
(4) Turn the ignition switch from "LOCK" (OFF) position to "ON" 

position.

(5) Check if DTC is set.
Q: Is the DTC set?

YES : Replace the ETACS-ECU.
NO :  The procedure is complete.

TROUBLE SYMPTOM CHART

M1541500700075

SYMPTOM PROCEDURES

Inspection Procedure 1: The hazard warning lights do not illuminate.

CAUTION

Before replacing the ECU, ensure that the power 
supply circuit, the ground circuit and the com-
munication circuit are normal.

.

TECHNICAL DESCRIPTION (COMMENT)

If the hazard warning light does not illuminate, the 
hazard warning light switch input circuit in center 
panel unit or the ETACS-ECU may have a problem.

.

TROUBLESHOOTING HINTS

• Malfunction of center panel unit

• Malfunction of the ETACS-ECU

• The wiring harness or connectors may have 

loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector

AC608435

Data link connector

MB991827

MB991824

MB991910

AB

Inspection 
Procedure No.

Trouble symptom

Reference page

1

The hazard warning lights do not illuminate.

P.54A-266

HAZARD WARNING LIGHT SWITCH

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CHASSIS ELECTRICAL

54A-267

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. Check that the turn-signal light operate.
Check that the turn-signal lights illuminate normally.
Q: Does turn-signal light work normally?

YES : Go to Step 2.
NO :  Diagnose the headlights. Refer to Inspection 

Procedure 11 "All the turn-signal lights do not 
illuminate" 

P.54A-168

.

STEP 2. Using scan tool MB991958, check data list. 
Using the ETACS-ECU service data, check the hazard warning 
light signal.

CAUTION

To prevent damage to scan tool MB991958, always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
1.Connect scan tool MB991958. Refer to "How to connect scan 
tool (M.U.T.-III) 

P.54A-263

."

2.Turn the ignition switch to the "ACC" position.
3.Turn "ON" the hazard light switch.

Q: Does scan tool MB991958 display the items "Hazard 

switch" as normal condition?
YES : (Normal condition is displayed for item) Go to Step 3.
NO :  (Normal condition is not displayed for item No. 265.) 

Troubleshoot the ETACS-ECU. Refer to ETACS, 
Diagnosis - Inspection Procedure 10 "ETACS-ECU 
does not receive any signal from the hazard warning 
light switch" 

P.54A-667

.

Item No.

Item name

Normal conditions

Item 265

Hazard switch

ON

AC608435

Data link connector

MB991827

MB991824

MB991910

AB

HORN

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CHASSIS ELECTRICAL

54A-268

STEP 3. Retest the system
Check that the hazard warning light illuminate normally.
Q: Does the taillight work normally?

YES : The trouble can be an intermittent malfunction (Refer 

to GROUP 00, How to use 
Troubleshooting/inspection Service Points, How to 
Cope with Intermittent Malfunction 

P.00-15

).

NO :  Replace the ETACS-ECU.

REMOVAL AND INSTALLATION

M1541501000154

Refer to GROUP 52A 

− Instrument Center Panel 

P.52A-7

.

INSPECTION

HAZARD WARNING LIGHT SWITCH CHECK

M1541501100236

Check the ETACS service data list using the scan tool 
MB991958. With the item No. 265 (Hazard switch), it is judged 
normal if the display shows ON when the hazard warning light 
switch is pressed, and OFF when not pressed.

HORN

REMOVAL AND INSTALLATION

M1542100200365

AC708873AC

6

2

1

5

4

3

18 ± 7 N·m
13 ± 4 ft-lb

18 ± 7 N·m
13 ± 4 ft-lb

18 ± 7 N·m
13 ± 4 ft-lb

18 ± 7 N·m
13 ± 4 ft-lb