Mitsubishi Grandis. Manual — part 23
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-89
DIAGNOSTIC PROCEDURE
Step 1. Connector check: C-219 ETACS-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Repair the defective connector.
Step 2. Voltage measurement at the C-219
ETACS-ECU connector.
(1) Remove the ETACS-ECU, and measure at the
junction block side.
(2) Voltage between C-219 ETACS-ECU connector
terminal No.20 and body earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 4.
NO :
Go to Step 3.
AC310626
Connector: C-219
Junction block (Rear view)
<LHD>
AB
Junction block side
AC310620
Connector: C-219
Junction block
(Rear view)
<RHD>
AB
Junction block side
AC310626
Connector: C-219
Junction block (Rear view)
<LHD>
AB
Junction block side
AC310620
Connector: C-219
Junction block
(Rear view)
<RHD>
AB
Junction block side
AC301541IE
Connector C-219
(Junction block side)
2019
7
13
17
18
1615 14
10
11
12
9 8
2
6 5
3
4
1
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-90
Step 3. Check the wiring harness between C-219
ETACS-ECU connector terminal No.20 and
fusible link (26).
NOTE:
AC310626
Connector: C-219
Junction block (Rear view)
<LHD>
AB
Junction block side
AC310620
Connector: C-219
Junction block
(Rear view)
<RHD>
AB
Junction block side
AC310614
AZ
Connectors: C-31, C-125 <LHD>
C-125
C-125
C-31
C-31
AC310628
Connector: C-125 <RHD>
AR
AC310623
Connectors: C-203 <LHD>
AL
Harness side
10
1
6
14
5
12
13
4
11
7
2
3
8
9
Junction block (Front view)
AC310618
Connectors: C-203 <RHD>
AK
Harness side
10
1
6
14
5
12
13
4
11
7
2
3
8
9
Junction block (Front view)
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-91
Prior to the wiring harness inspection, check
intermediate connector C-125 and joint connector
C-31 <LH drive vehicles>, junction block connector
C-203, and repair if necessary.
• Check the power supply line 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.
Step 4. Resistance measurement at the C-219
ETACS-ECU connector.
(1) Remove the ETACS-ECU, and measure at the
junction block side.
(2) Continuity between C-219 ETACS-ECU
connector terminal No.3 and body earth.
OK: 2
Ω or less
Q: Is the check result normal?
YES :
Go to Step 6.
NO :
Go to Step 5.
Step 5. Check the wiring harness between C-219
ETACS-ECU connector terminal No.3 and body
earth.
NOTE:
Prior to the wiring harness inspection, check junction
block connector C-205, and repair if necessary.
• Check the earth wires for open circuit.
Q: Is the check result normal?
AC310626
Connector: C-219
Junction block (Rear view)
<LHD>
AB
Junction block side
AC310620
Connector: C-219
Junction block
(Rear view)
<RHD>
AB
Junction block side
AC310506
Connector C-219
(Junction block side)
AV
AC310626
Connector: C-219
Junction block (Rear view)
<LHD>
AB
Junction block side
AC310620
Connector: C-219
Junction block
(Rear view)
<RHD>
AB
Junction block side
AC310623
Connector: C-205 <LHD>
AM
Harness side
Junction block (Front view)
AC310618
Connectors: C-205 <RHD>
AL
Harness side
Junction block (Front view)
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-92
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00
− How to
Cope with Intermittent Malfunction
NO :
Repair the wiring harness.
Step 6. Retest the system.
Check that the battery power supply circuit to the
ETACS-ECU is normal.
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.
TONE ALARM
Inspection Procedure B-1: Lamp reminder buzzer function does not work normally.
CAUTION
Whenever the ECU is replaced, ensure that the
input and output signal circuits are normal.
COMMENTS ON TROUBLE SYMPTOM
The ETACS-ECU operates this function in
accordance with the input signals below.
• Ignition switch (IG1)
• Driver's door switch
• Tail lamp switch
• Headlamp switch
If this function does not work normally, these input
signal circuit(s) or the ETACS-ECU may be
defective.
POSSIBLE CAUSES
• Malfunction of the driver's door switch
• Malfunction of the column switch
• Malfunction of the ETACS-ECU
• Damaged harness wires and connectors
DIAGNOSTIC PROCEDURE
Step 1. Check the power supply circuit.
When the ignition switch is turned to the LOCK
(OFF) position, check if the hazard warning lamps
illuminate.
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Refer to inspection procedure A-2 "Check
the ETACS-ECU battery power supply
circuit
ETACS-ECU
INPUT SIGNAL
· DRIVER'S DOOR SWITCH
· TAIL LAMP SWITCH
· IGNITION SWITCH (IG1)
· HEADLAMP SWITCH
Lamp Reminder Buzzer Function
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