Mitsubishi Grandis. Manual — part 212
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-310
Step 7. Check the wiring harness from A-35
headlamp (HI: RH) connector terminal No.1 or
A-21 headlamp (HI: LH) connector terminal No.1,
A-38 headlamp (LO: RH) connector terminal No.2
or A-18 headlamp (LO: LH) connector terminal
No.2 to A-14X front-ECU connector terminal
Nos.2 and 6.
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-311
AC311521AB
Connector: A-14X
Relay box side
AC310404
AB
Connectors: A-18, A-21 <LHD>
A-18 (B)
A-18
Harness side
A-21 (GR)
A-21
Harness side
AC310399
AB
Connectors: A-18, A-21 <RHD>
A-18 (B)
A-18
Harness side
A-21 (GR)
A-21
Harness side
AC310402
AB
Connectors: A-35, A-38 <LHD>
A-38 (B)
A-35
Harness side
A-35 (GR)
A-38
Harness side
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-312
• Check the output lines for open circuit.
Q: Is the check result normal?
YES :
Go to Step 8.
NO :
Repair the wiring harness.
Step 8. Retest the system.
(1) Replace the socket of the defective headlamp.
(2) Check that the headlamps operate normally.
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 headlamp assembly.
Inspection Procedure M-8: The high-beam indicator lamp does not illuminate.
CAUTION
Whenever the ECU is replaced, ensure that the
input and output signal circuits are normal.
COMMENTS ON TROUBLE SYMPTOM
If the high beam indicator does not illuminate
normally, connector(s), wiring harness in the CAN
bus lines, the ETACS-ECU or the combination meter
may be defective.
POSSIBLE CAUSES
• The combination meter may be defective
• The ETACS-ECU may be defective
• Damaged harness wires and connectors
AC310397
AB
Connectors: A-35, A-38 <RHD>
A-38 (B)
A-35
Harness side
A-35 (GR)
A-38
Harness side
INPUT SIGNAL
ETACS-ECU
DIMMER SWITCH
COMBINATION
METER
CAN COMMUNICATION LINE
(CAN_L LINE)
CAN COMMUNICATION LINE
(CAN_H LINE)
High-Beam Indicator Lamp Circuit
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-313
DIAGNOSIS PROCEDURE
Step 1. Check the headlamps.
When the lighting switch is operated, check that the
headlamps illuminate/go off normally.
Q: Are the headlamps in good condition?
YES :
Go to Step 2.
NO :
First, repair the headlamps. Refer to
Inspection Procedure M-3 "The high-beam
headlamps do not illuminate normally
Step 2. MUT-III CAN bus diagnostics.
Use the MUT-III to diagnose the CAN bus lines.
Q: Is the check result normal?
YES :
Go to Step 3.
NO :
Repair the CAN bus line (Refer to GROUP
54D, Diagnosis
Step 3. Check for combination meter diagnosis
code.
Check whether the combination meter-related
diagnosis code is set.
Q: Is the diagnosis code set?
YES :
Diagnose the combination meter (Refer to
GROUP 54A
− Troubleshooting
NO :
Go to Step 4.
Step 4. ECU check by using the SWS monitor
Check that the power supply and earth lines to the
ETACS-ECU and the SWS communication lines are
normal.
• Ignition switch: OFF
ECU TO BE CHECKED
• ETACS ECU
OK: "OK" is displayed on the "ETACS ECU"
menu.
Q: Is the check result normal?
YES :
Go to Step 5.
NO :
Refer to Inspection Procedure A-3
"Communication with the ETACS-ECU is
not possible
Step 5. MUT-III actuator test
Perform the actuator test for the combination meter,
and check that the high-beam indicator illuminates
(Refer to GROUP 54A
− Combination Meter
Q: Is the check result normal?
YES :
Replace the ETACS-ECU.
NO :
Replace the combination meter.
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