Mitsubishi Lancer (4A9 engine). Manual — part 139
HAZARD WARNING LAMP SWITCH
CHASSIS ELECTRICAL
54A-218
TROUBLESHOOTING
STANDARD FLOW OF DIAGNOSTIC
TROUBLESHOOTING
M1541501400141
Refer to GROUP 00
− Contents of troubleshooting .
DIAGNOSIS FUNCTION
M1541500600090
HOW TO READ DIAGNOSIS CODE
Refer to GROUP 00
− Diagnosis function .
HOW TO ERASE DIAGNOSIS CODE
Refer to GROUP 00
− Diagnosis function .
DIAGNOSIS CODE CHART
M1541500200081
CAUTION
On troubleshooting, if the ignition switch is turned ON while disconnecting connector(s), diagnosis
code(s) associated with other system may be set. On completion, confirm all systems for diagnosis
code(s). If diagnosis code(s) are set, erase them all.
DIAGNOSIS CODE PROCEDURES
Code No.B16A6 Hazard warning lamp blown fuse
DIAGNOSTIC FUNCTION
When the hazard warning lamp fuse is blown, the
ETACS-ECU sets the diagnosis code No. B16A6.
JUDGEMENT CRITERIA
With the diagnosis code not set, when the blown fuse
of hazard warning lamp is detected three times con-
secutively, the ETACS-ECU sets the diagnosis code
No. B16A3.
PROBABLE CAUSES
• Damaged harness wires and connectors
• Malfunction of the ETACS-ECU
DIAGNOSIS PROCEDURE
STEP 1. Fuse check
Check if the turn-signal lamp fuse is normal.
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Replace the turn-signal lamp fuse.
STEP 2. Check whether the diagnosis code is
reset.
(1) Erase the diagnosis code.
(2) Turn the ignition switch from "LOCK" (OFF)
position to "ON" position.
(3) Check if diagnosis code is set.
Q: Is the diagnosis code set?
YES :
Replace the ETACS-ECU.
NO :
The diagnosis is complete.
MB992006
Extra fine probe
Continuity check and voltage
measurement at harness wire or
connector
Tool
Number
Name
Use
MB992006
Diagnosis code No.
Diagnostic item
Reference page
B16A6
Hazard warning lamp blown fuse
HAZARD WARNING LAMP SWITCH
CHASSIS ELECTRICAL
54A-219
TROUBLE SYMPTOM CHART
M1541500700268
SYMPTOM PROCEDURES
Inspection Procedure 1: The hazard warning lamps do not illuminate.
CAUTION
Before replacing the ECU, ensure that the power
supply circuit, the earth circuit and the communi-
cation circuit are normal.
COMMENTS ON TROUBLE SYMPTOM
If the hazard warning lamps do not illuminate, the
hazard warning lamp switch input circuit in centre
panel unit or the ETACS-ECU may have a problem.
PROBABLE CAUSES
• Malfunction of centre panel unit
• Malfunction of the ETACS-ECU
• Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
STEP 1. Check that the turn-signal lamps
operate.
Check that the turn-signal lamps illuminate normally.
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Diagnose the headlamps. Refer to
Inspection Procedure 10 "The turn-signal
lamps do not illuminate" .
STEP 2. M.U.T.-III data list
Using the ETACS-ECU service data, check the haz-
ard warning lamp signal.
• Turn ON the hazard lamp switch.
OK: Normal condition is displayed.
Q: Is the check result normal?
YES :
Go to Step 3.
NO :
Troubleshoot the ETACS-ECU. Refer to
Inspection Procedure 10 "The hazard
warning lamp switch signal is not received" .
STEP 3. Retest the system
Check that the hazard warning lamps illuminate nor-
mally.
Q: Is the check result normal?
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 ).
NO :
Replace the ETACS-ECU.
Inspection Procedure 2: The ESS (Emergency Stop signal System) function does not work normally.
CAUTION
Whenever the ECU is replaced, ensure that the
power supply circuit, the earth circuit and the
communication circuit are normal.
COMMENTS ON TROUBLE SYMPTOM
If the ESS (Emergency Stop signal System) function
does not work normally, ETACS-ECU, ABS-ECU or
ASC-ECU may be defective. Also, the ESS does not
work when the hazard warning lamps illuminate.
PROBABLE CAUSES
• Malfunction of the ETACS-ECU
• Malfunction of the ABS-ECU
• Malfunction of the ASC-ECU
Trouble symptom
Inspection
Procedure No.
Reference page
The hazard warning lamps do not illuminate.
1
The ESS (Emergency Stop signal System) function does not work
normally.
2
Item No.
Item name
Normal
condition
Item 265
Hazard switch
ON
HORN
CHASSIS ELECTRICAL
54A-220
DIAGNOSIS PROCEDURE
STEP 1. Check the hazard warning lamps.
Check that the hazard warning lamps illuminate
when the hazard warning lamp switch is turned ON.
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Refer to Inspection Procedure 1 "The
hazard warning lamps do not illuminate" .
STEP 2. M.U.T.-III other system diagnosis code
Check if diagnosis code is set to the ABS-ECU or
ASC-ECU.
Q: Is the diagnosis code set to the any of the above?
Set to the ABS-ECU. :
Troubleshoot the ABS.
Refer to GROUP 35B
− Troubleshooting .
Set to the ASC-ECU. :
Troubleshoot the ASC.
Refer to GROUP 35C
− Troubleshooting .
The diagnosis code is not set. :
Go to Step 3.
STEP 3. M.U.T.-III other system actuator test
ABS-ECU or ASC-ECU
• Item 10: ESS test mode (Refer to <ABS> or
<ASC>).
OK: The ESS function operates.
Q: Is the check result normal?
YES :
Go to Step 4.
NO :
Replace the ABS-ECU or ASC-ECU.
STEP 4. Retest the system
Check that the ESS function works normally.
Q: Is the check result normal?
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 ).
NO :
Go to Step 1.
REMOVAL AND INSTALLATION
M1541501000198
Refer to GROUP 52A
− Instrument Centre Panel .
INSPECTION
HAZARD WARNING LAMP SWITCH
CHECK
M1541501100247
Using the M.U.T.-III, check the data list of ETACS. It
is judged normal if the display turns ON when the
hazard warning lamp switch is pressed, or OFF when
not pressed for the item No. 265: Hazard switch.
HORN
REMOVAL AND INSTALLATION
M1542100201119
AC801676
1
2
18 ± 7 N·m
18 ± 7 N·m
AB
HORN
CHASSIS ELECTRICAL
54A-221
INSTALLATION SERVICE POINT
>>A<< HORN (LOW)/HORN (HIGH) INSTALLA-
TION
Use the earth bolts as the mounting bolts for horn
(LOW) and horn (HIGH). The earth bolts have "E"
mark on the bolt heads.
INSPECTION
HORN RELAY CHECK
M1542100400693
Removal Steps
•
Front bumper and radiator grille
assembly (Refer to GROUP 51
−
Front Bumper Assembly and
Radiator Grille ).
>>
A
<<
1.
Horn (HIGH)
>>
A
<<
2.
Horn (LOW)
AC805322
Battery voltage
Terminal
number
Normal
condition
At no energisation
3
− 4
No
continuity
With current supply
[terminal 1 (+), terminal 2
(
−)]
Continuity
exists (2
ohms or
less)
ACB01899AB
Horn relay
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