Page 408 of 1500

INPUT SIGNAL PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-408
INSPECTION PROCEDURE M-2: ETACS-ECU does not receive any signal from the ignition switch
(IG1).
.
CIRCUIT OPERATION
The ETACS-ECU operates the following equipment
or functions according to signal from the ignition
switch (IG1):
Light reminder tone alarm function
Seat belt tone alarm function
Door ajar warning buzzer
Turn-signal lamp buzzer
Multi center display operation tone
multi center display (middle grade type)>
Power window timer function
Sunroof timer function
Headlamp automatic shutdown function
Turn-signal lamp
Dome lamp dimming function
Ignition key hole illumination lamp
If the power supply circuit from the battery to the
ETACS-ECU is open, this circuit is used as
backup circuit.
If the signal is not normal, the equipment or functions
described in "CIRCUIT OPERATION" do not work
normally.
The ETACS-ECU receives information on the ignition
switch condition (IG1) from the combination meter
via CAN communication. If the ignition switch (IG1)
input signal is incorrect, refer to the Diagnostic Trou-
ble Code Chart P.54B-25.
.
TROUBLESHOOTING HINTS
Refer to circuit diagrams GROUP-90
Refer to configuration diagrams GROUP-80
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 Tool:
MB991223: Harness Set
STEP 1. Check ETACS-ECU connector C-219 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is ETACS-ECU connector C-219 in good condition?
YES : Go to Step 2.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
P.00E-2. If the functions described in "CIRCUIT
OPERATION" work normally, the input signal from the
ignition switch (IG1) should be normal.
Page 490 of 1500
52A-1
GROUP 52A
INTERIOR
CONTENTS
GENERAL DESCRIPTION. . . . . . . . .52A-3
SEAT BELT DIAGNOSIS. . . . . . . . . .52A-3
SPECIAL TOOLS . . . . . . . . . . . . . . . .52A-3
INSTRUMENT PANEL ASSEMBLY*.52A-4
REMOVAL AND INSTALLATION . . . . . . . . 52A-4
DISASSEMBLY AND ASSEMBLY . . . . . . . 52A-9
FLOOR CONSOLE ASSEMBLY . . . .52A-10
REMOVAL AND INSTALLATION . . . . . . . . 52A-10
TRIMS . . . . . . . . . . . . . . . . . . . . . . . . .52A-11
REMOVAL AND INSTALLATION . . . . . . . . 52A-11
DOOR TRIM . . . . . . . . . . . . . . . . . . . .52A-14
REMOVAL AND INSTALLATION . . . . . . . . 52A-14
DISASSEMBLY AND ASSEMBLY . . . . . . . 52A-17
HEADLINING . . . . . . . . . . . . . . . . . . .52A-19
REMOVAL AND INSTALLATION . . . . . . . . 52A-19
INSIDE REAR VIEW MIRROR . . . . . .52A-20
Continued on next page
WARNINGS REGARDING SERVICING OF SUPPLEMENTAL RESTRAINT SYSTEM (SRS) EQUIPPED VEHICLES
Page 491 of 1500

INTERIOR52A-2
FRONT SEAT ASSEMBLY* . . . . . . .52A-21
REMOVAL AND INSTALLATION . . . . . . . . 52A-21
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . 52A-23
POWER SEAT CONTINUITY AND
DIAGNOSTIC CHECKS . . . . . . . . . . . . . . . 52A-23
OPERATION CHECK OF POWER
SEAT MOTOR . . . . . . . . . . . . . . . . . . . . . . 52A-29
MEMORY SEAT CONTROLLER (MSC). . . 52A-31
DISASSEMBLY AND ASSEMBLY RH SIDE52A-33
DISASSEMBLY AND ASSEMBLY LH SIDE52A-37
REMOVAL SERVICE POINT . . . . . . . . . . . 52A-42
FRONT SEAT TRIM COVER
REMOVAL AND FITMENT . . . . . . . . . . . . . 52A-43
REAR SEAT CUSHION TRIM COVER
REMOVAL AND FITMENT . . . . . . . . . . . . . 52A-46
REAR SEAT BACK TRIM COVERREMOVAL AND FITMENT . . . . . . . . . . . . . 52A-49
REAR SEAT ASSEMBLY . . . . . . . . . .52A-55
REMOVAL AND INSTALLATION . . . . . . . . 52A-55
DISASSEMBLY AND REASSEMBLY . . . . . 52A-57
FRONT SEAT BELT* . . . . . . . . . . . . .52A-58
REMOVAL AND INSTALLATION . . . . . . . . 52A-58
INSPECTION. . . . . . . . . . . . . . . . . . . . . . . . 52A-59
REAR SEAT BELT . . . . . . . . . . . . . . .52A-59
REMOVAL AND INSTALLATION . . . . . . . . 52A-59
SPECIFICATIONS . . . . . . . . . . . . . . .52A-60
FASTENER TIGHTENING
SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . 52A-60
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.
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FRONT SEAT ASSEMBLY
INTERIOR52A-21
FRONT SEAT ASSEMBLY
REMOVAL AND INSTALLATIONM1522001300560
Before removing the front seat assembly, refer to GROUP 52B, Service Precautions
P.52B-16 and Air Bag Module and Clock Spring P.52B-237.
2. HEADREST
FRONT SEAT ASSEMBLY
REMOVAL STEPS
3. SEAT BELT SWITCH
CONNECTOR
4. POWER SEAT CONNECTOR RH
SEAT>
6. POWER SEAT CONNECTOR
7. SIDE-AIR BAG MODULE
CONNECTOR
SIDE-AIR BAG>
8. FRONT SEAT REAR ANCHOR
COVER
>>A<<10. FRONT SEAT ASSEMBLYFRONT SEAT ASSEMBLY
REMOVAL STEPS (Continued)