Mitsubishi Colt Ralliart. Manual — part 413
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-160
INSPECTION PROCEDURE J-8: The headlamps do not illuminate when the lamping switch is at
"TAIL" or "PASSING" position, but illuminate only at low beam when the switch is at "HEAD" position.
However, the headlamps do not illuminate at high beam.
CAUTION
Whenever the ECU is replaced, ensure that the
input and output signal circuits are normal.
COMMENTS ON TROUBLE SYMPTOM
If the headlamps illuminate only at low beam regard-
less of the lighting switch position, the headlamp
fail-safe function may be activated.
POSSIBLE CAUSES
• Malfunction of the column switch
• Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
Step 1. ECU check by using the SWS monitor.
Check that the power supply and earth lines to the
column switch (column-ECU) and the SWS commu-
nication lines are normal.
• Ignition switch: OFF
ECU TO BE CHECKED
• COLUMN ECU
OK:"OK" is displayed on the "COLUMN
ECU" menu.
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Refer to Inspection Procedure A-2
"Communication with column switch
(column-ECU) is not possible
."
Step 2. Retest the system.
Check that the headlamps illuminate 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
).
NO :
Replace the column switch.
Main
Index
Group
TOC
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-161
FOG LAMP
INSPECTION PROCEDURE K-1: The fog lamps do not illuminate normally.
CAUTION
Whenever the ECU is replaced, ensure that the
input and output signal circuits are normal.
COMMENTS ON TROUBLE SYMPTOM
If the fog lamps do not illuminate normally, the input
signal circuit(s) below or the ETACS-ECU may be
defective.
• Tail lamp switch
• Headlamp switch
• Fog lamp switch
POSSIBLE CAUSES
• Malfunction of the column switch
• Malfunction of the fog lamp switch
• Malfunction of the front-ECU
• Malfunction of the ETACS-ECU
• Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
Step 1. Check that the tail/stop lamps and
headlamps operate.
Check that the tail/stop lamps and headlamps illumi-
nate normally.
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Repair the tail/stop lamp(s) and
headlamp(s). Refer to trouble symptom
chart
.
Fog Lamp Relay Circuit
Wire colour code
B : Black LG : Light green G : Green L : Blue W : White Y : Yellow SB : Sky blue
BR : Brown O : Orange GR : Gray R : Red P : Pink V : Violet
ETACS-ECU
FOG LAMP
RELAY
FOG LAMP
FUSIBLE
LINK
6
Main
Index
Group
TOC
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-162
Step 2. ECU check by using the SWS monitor
Check that the power supply and earth lines to the
column switch (column-ECU) and the ETACS-ECU
the SWS communication lines are normal.
• Ignition switch: OFF
ECU TO BE CHECKED
• COLUMN ECU
• ETACS ECU
OK: "OK" are displayed for all the items
Q: Is the check result normal?
"OK" are displayed for all the items :
Go to Step 3.
"NG" is displayed on the "COLUMN ECU" menu. :
Refer to Inspection Procedure A-2
"Communication with the column switch
(column-ECU) is not possible
."
"NG" is displayed on the "ETACS ECU" menu. :
Refer to Inspection Procedure A-3
"Communication with the ETACS-ECU is
not possible
Step 3. Function diagnosis by using the SWS
monitor
Check the SWS communication signal, which are
related to the fog lamps.
<Selected item> LIGHTING - F.FOG LAMP
• Ignition switch: ON
• Lighting switch: "TAIL" or "HEAD"
OK: Normal conditions are displayed for all
the items.
Q: Is the check result normal?
Normal conditions are displayed for all the items. :
Go to Step 4.
Normal condition is not displayed for item 00 or 01.
:
Refer to inspection procedure N-4 "Column
switch (lighting and turn-signal lamp switch)
signal is not received
Normal condition is not displayed for item No.30. :
Refer to inspection procedure N-2 "The
ignition switch (IG1) signal is not received
."
Step 4. ETACS switch data by using the SWS
monitor
Check the ETACS-ECU signals which are related to
the fog lamps.
• Fog lamp switch: ON
OK: Normal condition is displayed.
Q: Is the check result normal?
YES :
Go to Step 5.
NO :
Refer to inspection procedure N-13 "The fog
lamp switch signal is not received
."
Step 5. Connector check: B-115 fog lamp relay
connector
Q: Is the check result normal?
YES :
Go to Step 6.
NO :
Repair the defective connector.
Step 6. Check the fog lamp relay.
Refer to GROUP 54A
− Fog lamp
Q: Is the check result normal?
YES :
Go to Step 7.
NO :
Replace the fog lamp relay.
Item No.
Item name
Normal
condition
Item 00
HEADLAMP SW
ON when the
lighting switch is
at HEAD
Item 01
TAIL LAMP SW
ON when the
lighting switch is
at TAIL
Item 30
IG SW(IG1)
ON
Item No.
Item name
Normal
condition
Item 10
F.FOG LAMP SW
ON
AC313824 AH
Connector: B-115
Junction block side
Junction block (Front view)
Main
Index
Group
TOC
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-163
Step 7. Voltage measurement at the B-115 fog
lamp relay connector.
(1) Remove the fog lamp relay, and measure at the
junction block side.
(2) Check the voltage between the fog lamp relay
connector and body earth.
• Voltage between B-115 fog lamp relay con-
nector terminal No.1 and body earth
• Voltage between B-115 fog lamp relay con-
nector terminal No.3 and body earth
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 9.
NO :
Go to Step 8.
Step 8. Check the wiring harness between B-115
fog lamp relay connector terminals Nos.1 and 3
to the fusible link (6).
NOTE: Prior to the wiring harness inspection, check
junction block connector B-108, and repair if neces-
sary.
• Check the power supply line for open circuit.
Q: Is the check result normal?
YES :
Go to Step 11.
NO :
Repair the wiring harness.
Step 9. Connector check: B-133 ETACS-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 10.
NO :
Repair the defective connector.
AC313824 AH
Connector: B-115
Junction block side
Junction block (Front view)
AC310507 FF
Connector B-115
(Junction block side)
AC313825
Connectors: B-108, B-115
AG
B-115
B-115
B-108 (B)
B-108
Junction block (Front view)
Harness side
Junction block side
AC313826AC
B-133 (GR)
Connector: B-133
Harness side
Junction block (Rear view)
Main
Index
Group
TOC
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