Mitsubishi Grandis. Manual — part 259
INPUT SIGNAL PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-498
COMMENTS ON TROUBLE SYMPTOM
Input signal from the hazard warning lamp switch is
used to operate the functions below. If the signal is
abnormal, these functions will not work normally.
• Turn-signal lamp operation sound
• Keyless entry system (encrypted code
registration)
• Keyless entry hazard answerback
• Hazard warning lamp
POSSIBLE CAUSES
• Malfunction of the hazard warning lamp switch
• Malfunction of the ETACS-ECU
• Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
Step 1. Connector check: C-123 hazard warning
lamp switch connector
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Repair the defective connector.
ETACS-
ECU
HAZARD
WARNING
LAMP SWITCH
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
Hazard Warning Lamp Switch Input Circuit <RHD>
AC312031
AD
Connector: C-123 <LHD>
Harness side
AC312043AD
Connector: C-123 <RHD>
Harness side
INPUT SIGNAL PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-499
Step 2. Check the hazard warning lamp switch.
Refer to GROUP 54A
− Hazard warning lamp switch
.
Q: Is the check result normal?
YES :
Go to Step 3.
NO :
Replace the hazard warning lamp switch.
Step 3. Resistance measurement at the C-123
hazard warning lamp switch connector.
(1) Disconnect the connector, and measure at the
wiring harness side.
(2) Resistance between C-123 hazard warning lamp
switch connector terminal No.2 and body earth
OK: 2
Ω or less
Q: Is the check result normal?
YES :
Go to Step 5.
NO :
Go to Step 4.
Step 4. Check the wiring harness between C-123
hazard warning lamp switch connector terminal
No.2 and the body earth.
NOTE:
Prior to the wiring harness inspection, check joint
connector C-31 <RH drive vehicles>, and repair if
necessary.
• 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.
AC312031
AD
Connector: C-123 <LHD>
Harness side
AC312043AD
Connector: C-123 <RHD>
Harness side
AC312730AD
Connector C-123
(Harness side)
AC312031
AD
Connector: C-123 <LHD>
Harness side
AC312043AD
Connector: C-123 <RHD>
Harness side
AC312043AE
Connector: C-31 <RHD>
INPUT SIGNAL PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-500
Step 5. Connector check: C-221 ETACS-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 6.
NO :
Repair the defective connector.
Step 6. Check the wiring harness between C-221
ETACS-ECU connector terminal No.55 and C-123
hazard warning lamp switch connector terminal
No.1.
• Check the input line for open circuit.
Q: Is the check result normal?
YES :
Go to Step 7.
NO :
Repair the wiring harness.
AC312037
Connector: C-221 <LHD>
Junction block (Rear view)
AD
Harness side
AC312047
Connector: C-221 <RHD>
Junction block (Rear view)
AD
Harness side
AC312031
AD
Connector: C-123 <LHD>
Harness side
AC312043AD
Connector: C-123 <RHD>
Harness side
AC312037
Connector: C-221 <LHD>
Junction block (Rear view)
AD
Harness side
AC312047
Connector: C-221 <RHD>
Junction block (Rear view)
AD
Harness side
INPUT SIGNAL PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-501
Step 7. ETACS switch data by using the SWS
monitor
Check the input signal from the hazard warning lamp
switch.
• hazard warning lamp switch: from OFF to ON
OK: Normal condition is displayed.
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 :
Replace the ETACS-ECU.
Inspection Procedure Q-13: The rear fog lamp switch signal is not received.
CAUTION
Whenever the ECU is replaced, ensure that the
input signal circuit is normal.
Item No.
Item name
Normal condition
Item 04
HAZARD LMP
SW
OFF to ON (only
when switch is
operated)
Rear Fog Lamp Switch Input Circuit
ETACS-
ECU
FOG LAMP
SWITCH
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
<RHD>
<LHD>
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