Page 398 of 1500
SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-398
INSPECTION PROCEDURE K-7: Interior Light: The seat belt warning lamp do not illuminate or go out
normally
NOTE: This troubleshooting procedure requires the
use of diagnostic tool MB991958 and SWS monitor
kit MB991813. For details on how to use the SWS
monitor, refer to "How to connect SWS monitor
P.54B-13."
.
CIRCUIT OPERATION
The combination meter and the ETACS-ECU illumi-
nates and flashes the seat belt warning lamp by
using the signal from the seat belt switch, the ignition
switch (IG1) and the vehicle speed signal.
.
TECHNICAL DESCRIPTION (COMMENT)
If the seat belt warning lamp does not illuminate or
flash correctly, connector(s), wiring harness in the
CAN bus lines, the door switches, the ETACS-ECU,
or the combination meter may be defective.
.
TROUBLESHOOTING HINTS
Refer to circuit diagrams GROUP-90
Refer to configuration diagrams GROUP-80
Trouble in input signal system
The wiring harness or connectors may have
loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector
The combination meter may be defective
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
MB991813: SWS Monitor Kit
MB991806: SWS Monitor Cartridge
MB991812: SWS Monitor Harness (For Column-ECU)
MB991822: Test Probe Harness
Page 401 of 1500
SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-401
STEP 4. Check the input signal by using "DATA LIST"
menu of the SWS monitor.
Check the input signals from the following switches:
Ignition switch: ON
(1) Operate diagnostic tool MB991958 according to the
procedure below to display "ETACS ECU."
a. Select "Interactive Diagnosis."
b. Select "System select."
c. Select "SWS."
d. Select "SWS MONITOR."
e. Select "Data List."
f. Select "ETACS ECU."
(2) Check that normal conditions are displayed for the items
described in the table below.
Q: Is the diagnostic tool MB991958 display the items "IG
SW (IG1)" normal condition?
YES : Go to Step 5.
NO : Refer to Inspection Procedure M-2 "ETACS-ECU
does not receive any signal from the ignition switch
(IG1) P.54B-408."
STEP 5. Replace the combination meter.
(1) Replace the combination meter.
(2) Check that the seat belt warning lamp illuminates normally.
Q: Is the seat belt warning lamp in good condition?
YES : No action is necessary and testing is complete.
NO : Replace the ETACS-ECU. Verify that the seat belt
warning lamp illuminates normally. ITEM NO. ITEM NAME NORMAL CONDITION
ITEM 30 IG SW (IG1) ON
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.
Page 499 of 1500
FLOOR CONSOLE ASSEMBLY
INTERIOR52A-10
FLOOR CONSOLE ASSEMBLY
REMOVAL AND INSTALLATIONM1521002200314
REMOVAL STEPS
1. GEARSHIFT LEVER PANEL
2. HEATED SEAT SWITCH
SWITCH>
3. ACCESSORY SOCKET (ACC)
(REFERTO GROUP 54A,
ACCESSORY SOCKET
P.54A-174.)
4. ACCESSORY SOCKET COVER
5. FRONT BOX
6. PLATE
7. FLOOR CONSOLE ASSEMBLY8. LID LOCK LEVER
9. HINGE
10. LID
11. INNER BOX
12. ACCESSORY SOCKET (+B)
(REFERTO GROUP 54A,
ACCESSORY SOCKET
P.54A-174.)
13. ACCESSORY SOCKET COVER
14. FLOOR CONSOLE
15. ACCESSORY SOCKET HARNESS
16. REAR BRACKETREMOVAL STEPS (Continued)
Page 500 of 1500
