Mitsubishi Grandis. Manual — part 223
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-354
POSSIBLE CAUSES
• Malfunction of the column switch
• Malfunction of the rear fog lamp switch
• 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
illuminate normally.
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Check the tail/stop lamps and the
headlamps (Refer to trouble symptom chart
).
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
and the SWS communication lines are normal.
• Ignition switch: OFF
ECUS TO BE CHECKED
• COLUMN ECU
• ETACS ECU
OK: "OK" are displayed for all the items
Q: Are the check result normal?
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
FUSIBLE
LINK
REAR FOG
LAMP
REAR
FOG
LAMP
RELAY
30
Rear Fog Lamp Circuit <RHD>
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-355
"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 - REAR FOG LAMP
• Ignition switch: ON
• Lighting switch: "TAIL" or "HEAD"
• Rear fog lamp switch: ON
OK: Normal conditions are displayed for all
the items.
Q: Are 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 Q-6 "The
column switch (Lighting and turn-signal
lamp and headlamp washer switch) signal is
not received
."
Step 4. ETACS switch data by using the SWS
monitor
Check the input signals below, which are related to
the rear fog lamp.
• Rear fog lamp switch: from OFF to ON
OK: Normal condition is displayed.
Q: Is the check result normal?
YES :
Go to Step 5.
NO :
Refer to inspection procedure Q-13 "The
rear fog lamp switch signal is not received
."
Step 5. Connector check: G-23 rear fog lamp
connector <LH drive vehicles> or G-11 rear fog
lamp connector <RH drive vehicles>
Q: Is the check result normal?
YES :
Go to Step 6.
NO :
Repair the defective connector.
Step 6. Check the bulbs of the rear fog lamps.
Check the bulb(s) of the defective lamp.
Q: Is the check result normal?
YES :
Go to Step 7.
NO :
Replace the bulb(s) of the defective lamp.
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 No. Item name
Normal conditions
Item 11
R.FOG LAMP SW OFF to ON (only
when switch is
operated)
AC310220
Connector: G-23
AE
G-23 (GR)
Harness side
AC310222
Connector: G-11
AE
G-11 (GR)
Harness side
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-356
Step 7. Resistance measurement at the G-23 rear
fog lamp connector <LH drive vehicles> or G-11
rear fog lamp connector <RH drive vehicles>.
(1) Disconnect the connector, and measure at the
wiring harness side.
(2) Check the resistance between the lamp
connector and body earth.
•
Resistance between G-23 rear fog lamp relay
connector <LH drive vehicles> or G-11 rear
fog lamp relay connector <RH drive vehicles>
connector terminal No.1 and body earth
OK: 2
Ω or less
Q: Is the check result normal?
YES :
Go to Step 9.
NO :
Go to Step 8.
Step 8. Check the wiring harness from G-23 rear
fog lamp connector <LH drive vehicles> or G-11
rear fog lamp connector <RH drive vehicles>
terminal No.1 to body earth.
• Check the earth wires for open circuit.
Q: Is the check result normal?
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00
− How to
Cope with Intermittent Malfunction
NO :
Repair the wiring harness.
AC310220
Connector: G-23
AE
G-23 (GR)
Harness side
AC310222
Connector: G-11
AE
G-11 (GR)
Harness side
AC310506BK
Connector
G-23 <L.H. drive vehicles> or
G-11 <R.H. drive vehicles>
(Harness side)
AC310220
Connector: G-23
AE
G-23 (GR)
Harness side
AC310222
Connector: G-11
AE
G-11 (GR)
Harness side
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-357
Step 9. Connector check: C-213 rear fog lamp
relay connector
Q: Is the check result normal?
YES :
Go to Step 10.
NO :
Repair the defective connector.
Step 10. Check the rear fog lamp relay.
Refer to GROUP 54A
− Rear fog lamp
Q: Is the check result normal?
YES :
Go to Step 11.
NO :
Replace the rear fog lamp relay.
Step 11. Voltage measurement at the C-213 rear
fog lamp relay connector.
(1) Remove the rear fog lamp relay, and measure at
the relay box side.
(2) Check the voltage between the rear fog lamp
relay connector and body earth.
• Voltage between C-213 rear fog lamp relay
connector terminal No.3 and body earth
• Voltage between C-213 rear fog lamp relay
connector terminal No.4 and body earth
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 13.
NO :
Go to Step 12.
AC310623
Connector: C-213 <LHD>
AP
Junction block side
Junction block (Front view)
AC310618
Connector: C-213 <RHD>
AN
Junction block side
Junction block (Front view)
AC310623
Connector: C-213 <LHD>
AP
Junction block side
Junction block (Front view)
AC310618
Connector: C-213 <RHD>
AN
Junction block side
Junction block (Front view)
AC310507BU
Connector C-213
(Relay box side)
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