Page 414 of 1500

INPUT SIGNAL PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-414
CIRCUIT OPERATION
The ETACS-ECU operates the following functions or
systems according to signal from the front door
switches:
Light reminder tone alarm function
switch (RH)>
Door ajar warning buzzer
Forgotten key reminder
Power window timer function
Sunroof timer function
Keyless entry system
Timed locking mechanism
Headlamp automatic shutdown function
door switch (RH)>
Dome lamp
Interior lamp automatic-shutdown function
Ignition key hole illumination lamp
switch (RH)>
Door-ajar indicator lamp
.
TECHNICAL DESCRIPTION (COMMENT)
If the signal is not normal, the functions or systems
described in "CIRCUIT OPERATION" do not work
normally. If the signal is not normal, the front door
switches or the ETACS-ECU may be defective.
.
TROUBLESHOOTING HINTS
Refer to circuit diagrams GROUP-90
Refer to configuration diagrams GROUP-80
The front door switches may be defective
The wiring harness or connectors may have
loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector
The ETACS-ECU may be defective
Page 440 of 1500

INPUT SIGNAL PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-440
INSPECTION PROCEDURE N-3: ETACS-ECU does not receive any signal from any of the door
switches.
.
CIRCUIT OPERATION
The ETACS-ECU operates the following functions or
systems according to signal from the front or rear
door switches:
Light reminder tone alarm function
switch (RH)>
Door ajar warning buzzer
Ignition key reminder tone alarm
switches>
Power window timer function
switches>
Sunroof timer function
Headlamp automatic shutdown function
door switch (RH)>
Keyless entry system
Timer lock
Dome lamp
Interior lamp automatic-shutdown function
door switches>
Ignition key hole illumination lamp
switch (RH)>
Door-ajar indicator lamp
.
TECHNICAL DESCRIPTION (COMMENT)
If the signal is not normal, the functions or systems
described in "CIRCUIT OPERATION" do not work
normally. If the signal is not normal, the front or rear
door switches or the ETACS-ECU may be defective.
.
TROUBLESHOOTING HINTS
Refer to circuit diagrams GROUP-90
Refer to configuration diagrams GROUP-80
The front or rear door switches may be defective
The wiring harness or connectors may have
loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector
The ETACS-ECU may be defective
DIAGNOSIS
Required Special Tools:
MB991223: Harness Set
MB991958: Diagnostic Tool (MUT-III Sub Assembly)
MB991824: Vehicle Communication Interface (V.C.I.)
MB991827: MUT-III USB Cable
MB991910: MUT-III Main Harness A
Page 492 of 1500
GENERAL DESCRIPTION
INTERIOR52A-3
GENERAL DESCRIPTIONM1521000100184
OPERATION
.
Seat belt warning system
If the driver turn the ignition switch to the "ON" posi-
tion without fastening the seat belt, the seat belt
warning light illuminates.
SEAT BELT DIAGNOSISM1523000700182
The seat belt warning system is controlled by the
Simplified Wiring System (SWS). For troubleshoot-
ing, refer to GROUP 54B, SWS diagnosis
P.54B-101.
SPECIAL TOOLSM1521000600327
TOOL TOOL NUMBER AND
NAMESUPERSESSION APPLICATION
MB990784
Ornament removerGeneral service
toolRemoval of switch, trim,
etc.
Page 508 of 1500
HEADLINING
INTERIOR52A-19
HEADLINING
REMOVAL AND INSTALLATIONM1521001400360
Pre-removal and Post-installation Operation
Front Seat Assembly (Refer to P.52A-21.)
Removal and Installation of Rear Seat Cushion Assembly
and Rear Seatback Assembly (Refer to P.52A-55.)
Removal and Installation of Front Pillar Trim, Center Pillar
Trim Upper and Rear Pillar Trim (Refer to P.52A-11.)
REMOVAL STEPS
1. SUN VISOR
2. SUN VISOR HOLDER
3. OVERHEAD CONSOLE
ASSEMBLY
4. DOME LIGHT ASSEMBLY (REFER
TO GROUP 54A, DOME LIGHT
P.54A-163.)
5. ASSIST GRIP PLUG
6. ROOF INSIDE ASSIST GRIP
ASSIST GRIP>
7. SUNROOF OPENING TRIM
8. ROOF HARNESS CLAMP
INSTRUMENT PANEL SIDE
COVER (REFER TO P.52A-4.)
9. ROOF HARNESS CONNECTOR
FLOOR CONSOLE ASSEMBLY
(REFER TO P.52A-10.)
PARKING BRAKE LEVER
ASSEMBLY MOUNTING BOLT
(REFER TO GROUP 36, PARKING
BRAKE LEVER P.36-6.)
<>10. HEADLINING ASSEMBLY
11. OVERHEAD CONSOLE BRACKET
12. FRONT HEADLINING PAD REMOVAL STEPS (Continued)
Page 531 of 1500

FRONT SEAT ASSEMBLY
INTERIOR52A-42
REMOVAL SERVICE POINT
.
<> HEADREST REMOVAL
1. Raise the head restraint fully.
2. Insert a probe that is suited to fit into the hole (1) in the right
hand head restraint sleeve (2) as illustrated in the figure
below.
3. Whilst the probe is inserted slightly, apply slight pressure on
the head restraint. Apply and hold pressure upwards.
4. To remove the head restraint, you must depress the sleeve
height adjuster lock (3) on the left-hand head restraint
sleeve as illustrated below.
<> HEADREST SLEEVE REMOVAL
1. To reveal upper portion of the seat back frame or
active head restraint frame (1) as shown in figure
below, push down on the surrounding seat cover.
2. By using a small flat blade screwdriver, depress
the sleeve locking tab (2), and remove the head
restaint sleeve (3) in upwards movement from the
frame as illustrated below.
3. If required, repeat process for the remaining
sleeve.
<> SEAT BACK PANEL REMOVAL
AND FITMENT
1. Move front seat to the most forward position.
2. Pull the lower edge of seat panel towards you, as
shown below (1).
3. Slide the panel downwards (2) as the top section
is held in by 2 locating hooks (lugs).
4. Upon fitment, be sure to firstly locate the top 2
lugs into position (2), as shown above.
5. Approximately square up panel to the seat, so by
doing this you will be able to locate the bottom 2
clips to press in the panel (1), as shown above.
Page 834 of 1500

AUTO A/C DIAGNOSIS
HEATER, AIR CONDITIONING AND VENTILATION55-133
DATA LIST REFERENCE TABLEM1554005100136
MUT-III
DIAGNOSTIC
TOOL DISPLAYITEM
NO.INSPECTION ITEM INSPECTION REQUIREMENT NORMAL VALUE
Inside
temperature
sensor59 Interior temperature
sensorIgnition switch: ON Inside air
temperature and
temperature
displayed on the
diagnostic tool are
identical.
Outside
temperature
sensor58 Outside temperature
sensorIgnition switch: ON Outside air
temperature and
temperature
displayed on the
diagnostic tool are
identical.
Air thermo sensor 20 Air thermo sensor Ignition switch: ON The temperature
measured behind
the evaporator
matches the
displayed value on
the diagnostic tool
while the engine is
cold.
Pressure sensor 61 A/C pressure sensor Ignition switch: ON Measured refrigerant
pressure is nearly
equal to the value
shown on the
diagnostic tool
(MPa).
Water
temperature
sensor62 Engine coolant
temperature sensor
(Data received by
CAN
Communication)Ignition switch: ON Engine coolant
temperature and
temperature
displayed on the
diagnostic tool are
identical.
Photo sensor 67 Photo sensor Ignition switch: ON Amount of light is
proportional to
voltage displayed on
the diagnostic tool.
Air mix
potentiometer63 Air mixing damper
control motor
potentiometerIgnition switch: ON Damper
positionOpening degree (V)
MAX. HOT Approx. 5
MAX. COOL Approx. 0
Air mix
potentiometer
(Target)64 Target value for air
mixing damper
control motor
potentiometerIgnition switch: ON Damper
positionOpening degree (V)
MAX. HOT Approx. 5
MAX. COOL Approx. 0
Page 839 of 1500

AUTO A/C DIAGNOSIS
HEATER, AIR CONDITIONING AND VENTILATION55-138
16 Potentiometer power supply Ignition switch: ON 5 V
17 Power transistor (BASE) When the blower speed
selection dial shows Maximum
air volume.1 V
18 Power transistor
(COLLECTOR)When the blower speed
selection dial shows Maximum
air volume.12.1 V
19 Photo sensor Ignition switch: ON 5 V
20 Sensors and potentiometers
groundAlways 0 V
21 Mode selection damper control
motor potentiometer inputWhen the damper is moved to
the FACE position. 4 V
22 Interior temperature sensor Ignition switch: ON 5 V
23 Ambient temperature sensor
inputWhen sensor temperature is
25
C (77F) [4 k]1.9 V
24 Air thermo sensor input When sensor temperature is
25
C (77F) [1.5 k]2.2 V
25 Photo sensor ground Ignition switch: ON 0 V
26 A/C pressure sensor at 2.6 MPa 3.9 V
27 Ground Always 0 V
28 Power supply to the ignition
switch (IG2)Ignition switch: ON Battery positive voltage
29 Air mixing damper control motor
potentiometer inputWhen the damper door is
moved to the MAX. HOT
position.1.4 V
30 Illumination ground Always 0 V
31 ILL power supply Lighting switch: ON Battery positive voltage
34 A/C pressure sensor ground Always 0 V
36 Power supply to the ignition
switch (ACC)Ignition switch: ON Battery positive voltage TERMINAL
NO.CHECK ITEM CHECKING REQUIREMENTS NORMAL CONDITION