Mitsubishi Grandis. Manual - part 70
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-277
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), the front-ECU or the ETACS-ECU
may be defective. Note that this function can be
disabled/enabled by the adjustment function (default
setting; enabled).
POSSIBLE CAUSES
• Malfunction of the driver's door switch
• Malfunction of the front-ECU
• Malfunction of the column switch
• Malfunction of the ETACS-ECU
• Damaged harness wires and connectors
DIAGNOSTIC PROCEDURE
Step 1. Check that the headlamps operate.
Check that the low-beam and high-beam headlamps
work normally.
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Repair the headlamps. Refer to trouble
symptom chart
Step 2. Pulse check
Check the input signals below, which are related to
the headlamp automatic-shutdown function.
OK: The MUT-III sounds or the voltmeter
needle fluctuates.
Q: Is the check result normal?
All the signals are received normally. :
Go to Step
The ignition switch (IG1) signal is not received. :
Refer to inspection procedure Q-2 "The
ignition switch (IG1) signal is not received
The driver's door switch signal is not received. :
Refer to inspection procedure Q-5 "The
driver's door switch signal is not received
<LH drive vehicles>
or <RH
drive vehicles>
The tail lamp switch signal is not received. :
Refer
to inspection procedure Q-6 "The column
switch (lighting and turn-signal lamp switch)
signal is not received
Step 3. Customize function by using the SWS
monitor.
Check that the headlamp automatic-shutdown
function has been enabled by using the customized
function.
CAUTION
The SWS monitor must be used in order to
confirm and change that setting. Use the SWS
monitor to confirm and/or change the
customized function.
Q: Is the check result normal?
YES :
Go to Step 4.
NO :
Enable the headlamp automatic-shutdown
function by using the customized function
(Refer to GROUP 54C, Customize function
).
Step 4. Retest the system.
Replace the ETACS-ECU, and then check that the
headlamp automatic-shutdown function works
normally.
(1) Replace the ETACS-ECU.
(2) Check that the headlamp automatic-shutdown
function works 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 front-ECU.
System switch
Check condition
Ignition switch (IG1)
When turned from ACC to
ON
Driver's door switch
When the driver's door is
opened
Tail lamp switch
When the lighting switch is
turned to the TAIL position