Mitsubishi Montero (2002-2004). Manual — part 477
DOME LIGHT
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CHASSIS ELECTRICAL
54A-79
DOME LIGHT
DOME LIGHT DIAGNOSIS
M1542010500263
The dome light is controlled by the Simplified Wiring
System (SWS). For troubleshooting, refer to GROUP
54B, SWS Diagnosis
− Symptom Chart
HIGH-MOUNTED STOPLIGHT
REMOVAL AND INSTALLATION
M1542005100151
ACX00801AB
3
2
1
4
REMOVAL STEPS
1.
HIGH-MOUNTED STOPLIGHT
COVER
2.
HIGH-MOUNTED STOPLIGHT
BODY
3.
SOCKET ASSEMBLY
4.
BULB
REMOVAL STEPS (Continued)
SIDE STEP LIGHT
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CHASSIS ELECTRICAL
54A-80
SIDE STEP LIGHT
GENERAL DESCRIPTION CONCERNING THE SIDE STEP LIGHT
M1542013000018
.
SIDE STEP LIGHT TIMER FUNCTION
The side step light-ECU controls the side step lights
as follows when the ignition switch is at "LOCK"
(OFF) position and all the doors are closed:
• If the side step light-ECU receives door unlock
signal from the unlock relay, the side step lights
fade in over a 0.6 second period, and then illumi-
nate for 13.2 seconds at maximum brightness.
Then the lights will fade out over a 1.2 second
period.
• If the side step light-ECU receives lock signal
from the lock relay, the side step lights fade out
over a 1.2 second period.
• If a door is opened, the side step lights fade in
over a 0.6 second period, and then illuminate for
148.2 seconds at maximum brightness. Then the
lights will fade out over a 1.2 second period.
The side step light-ECU controls the side step lights
as follows when the ignition switch is at "LOCK"
(OFF) position and any door is open:
• The side step lights do not go out until a predeter-
mined period elapses even if the doors are
locked.
• The side step lights do not illuminate even if the
doors are unlocked.
• When the doors are closed while the side step
lights are on, the lights illuminate for 28.8 sec-
onds at maximum brightness immediately after
that and then fade out.
• If all the doors are closed with the side step lights
on and then any door is opened before the lights
go out, the lights illuminate for 148.2 seconds at
maximum brightness immediately after that, and
then fade out.
If the ignition switch is turned from "LOCK" (OFF) to
"ON" with the side step lights on, the side step light-
ECU makes the side step lights fade out.
SIDE STEP LIGHT DIAGNOSIS
INTRODUCTION
M1542010500564
The side step light system consists of the side step
light assembly, side step light-ECU, ETACS-ECU
and all door switches. If the side step light does not
illuminate, one of these components may be defec-
tive.
AC203828
ON
OFF
ON (Door opened)
OFF (Door closed)
ON
OFF
Ignition switch (IG1)
<SAMPLE TIMING CHART>
Door switch
Side step light output
t1
t2 t3
t1: 0.6 second
t2: 13.2 seconds
t3: 1.2 seconds
t4: 148.2 seconds
t5: 28.8 seconds
Lock relay output
OFF
ON
Unlock relay output
OFF
ON
t4
t1
not
more
than t2
t3
t1
t3
t3
t1
t3
t1
not
more
than t4
t5
not
more
than t4
AB
SIDE STEP LIGHT
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CHASSIS ELECTRICAL
54A-81
TROUBLESHOOTING STRATEGY
M1542010600141
Use these steps to plan your diagnostic strategy. If
you follow them carefully, you will be sure that you
have exhausted most of the possible ways to find a
side step light fault.
1. Gather information from the customer.
2. Verify that the condition described by the
customer exists.
3. Find the malfunction by following the symptom
chart.
4. Verify the malfunction is eliminated.
SYMPTOM CHART
M1542009100227
SYMPTOM
INSPECTION
PROCEDURE
REFERENCE PAGE
The side step light do not illuminate.
1
The left or right side step light do not illuminate.
2
The side step light do not illuminate normally when the door is
unlocked or locked.
3
The side step light do not illuminate normally when any door is
opened or closed.
4
SIDE STEP LIGHT
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CHASSIS ELECTRICAL
54A-82
SYMPTOM PROCEDURES
INSPECTION PROCEDURE 1: The Side Step Lights do not Illuminate.
Side Step Light-ECU Circuit
ACX02274
FUSIBLE LINK (1)
AE
BATTERY
AC204170
CONNECTORS : D-28, D-137
D-28
AV
D-137(GR)
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