SWS DIAGNOSIS
SIMPLIFIED WIRING SYSTEM (SWS)54B-16
COLUMN ECU
.
CHECK
ITEMITEM NO. DISPLAY ON
DIAGNOSTIC
TOOLCHECK CONDITION NORMAL
CONDITION
Dimmer
switch02 DIMMER SW Dimmer switch: ON ON
Dimmer switch: OFF OFF
Windshield
washer
switch09 FRONT
WASH.SWWindshield washer switch: ON ON
Windshield washer switch: OFF OFF
Headlamp
switch00
HEADLAMP
SWLighting switch: HEAD ON
Lighting switch: Other than HEAD OFF
Windshield
high-speed
wiper switch07 HI WIPER SW Wiper switch: HI ON
Wiper switch: Other than HI OFF
With or
without
windshield
intermittent
wiper interval
adjusting
knob15 INT WIPE
KNOBVehicles with intermittent wiper control EQUIP
Vehicles without intermittent wiper control NON
Windshield
intermittent
wiper switch05 INT WIPER SW Wiper switch: INT ON
Wiper switch: Other than INT OFF
Windshield
low-speed
wiper switch06 LO WIPER SW Wiper switch: LO ON
Wiper switch: Other than LO OFF
Windshield
mist wiper
switch08 MIST WIPER
SWWiper switch: Mist ON
Wiper switch: Other than "Mist" position OFF
Passing lamp
switch03 PASSING SW Passing lamp switch: ON ON
Passing lamp switch: OFF OFF
Ta i l l a m p
switch01 TAILLAMP SW Lighting switch: TAIL ON
Lighting switch: OFF OFF
Turn-signal
lamp switch
(LH)11 T/S LH SW Turn-signal lamp switch: LH ON
Turn-signal lamp switch: Other than LH OFF
Turn-signal
lamp switch
(RH)10 T/S RH SW Turn-signal lamp switch: RH ON
Turn-signal lamp switch: Other than RH OFF
SWS DIAGNOSIS
SIMPLIFIED WIRING SYSTEM (SWS)54B-17
ETACS
NOTE: For item No.43, the diagnostic tool
MB991958 (MUT-III Sub Assembly) also displays
"ON" when the lamp reminder tone alarm or the seat
belt tone alarm function is triggered.
.
CHECK
ITEMITEM NO. DISPLAY ON
DIAGNOSTIC
TOOLCHECK CONDITION NORMAL
CONDITION
Tone alarm 43 BUZZER When requirements for sounding each
warning tone alarm are not satisfiedOFF
Front fog
lamps36 F.FOG LAMP
1. Lighting switch: HEAD
2. Fog lamp switch: ONON
Other than the condition above OFF
Driver’s door
switch32 FRONT DOOR
SWDriver’s door switch and Front passenger’s
door switch is on ON
Driver’s door switch and Front passenger’s
door switch is offOFF
Headlamp
automatic
shutoff
function35 H/L AUTO-CUT
1. Lighting switch: Other than OFF
2. Ignition switch: from ON or START to
LOCK (OFF) or ACC
3. Front door switch: ON (front door open) OFF to ON (after
approximately one
second)
When requirements for the headlamp
automatic shutoff are not satisfiedOFF
Ignition
switch (ACC)31 IG SW (ACC) Ignition switch: ACC or ON ON
Ignition switch: LOCK (OFF) or START OFF
Ignition
switch (IG1)30 IG SW (IG1) Ignition switch: ON or START ON
Ignition switch: LOCK (OFF) or ACC OFF
Windshield
intermittent
wiper interval37 INT WIPE
TIME1. Ignition switch: ACC or ON
2. Operate the intermittent wiper control,
and change the wiper intervalThe diagnostic tool
MB991958
(MUT-III Sub
Assembly)
displays
intermittent wiper
interval in
response to the
intermittent wiper
control positions.
SWS DIAGNOSIS
SIMPLIFIED WIRING SYSTEM (SWS)54B-18
Front-ECU, P/W, S/R
NOTE: For item No.70, the diagnostic tool
MB991958 (MUT-III Sub Assembly) also displays
"NG" under "ECU COMM Check" when it displays
"NO ACK" under the front-ECU check.NOTE: For item No.72, the diagnostic tool
MB991958 (MUT-III Sub Assembly) also displays
"NG" under "ECU COMM Check" when it displays
"NO ACK" under the sunroof-ECU check.
The table below shows the service data and their
normal condition, which are displayed during the
"Function Diag." The column "Normal condition"
shows values that are shown when each operation is
made.
.
CHECK
ITEMITEM NO. DISPLAY ON
DIAGNOSTIC
TOOLCHECK CONDITION NORMAL
CONDITION
Response by
the
front-ECU70 FRONT ECU
ACKLighting switch: Other than OFF (excluding
when high-beam is on) or the wiper switch
is at position other than OFF (ignition
switch: ACC or ON)NORMAL ACK
Ignition switch: Other than ON
Lighting switch: OFF
Wiper switch: OFFSLEEP ACK
Lighting switch: HEAD
Headlights: at high beamHI-BEAM ACK
Other than the condition above NO ACK
Response by
the
sunroof-ECU72 S/R ECU ACK
1. Door switch: OFF
2. Ignition switch: ON
OFF
3. While sunroof is offNORMAL ACK
SLEEP ACK (after
approximately 30
seconds)
1. Ignition switch: ON or START
2. One of the sunroof switches is onINPUT CHECK to
NORMAL ACK
Other than the above conditions NO ACK
SWS DIAGNOSIS
SIMPLIFIED WIRING SYSTEM (SWS)54B-19
WIPER
ITEM ITEM NO. INPUT SIGNAL DISPLAY ON
DIAGNOSTIC TOOLNORMAL CONDITION
F.WIPER HI 05 Windshield
intermittent wiper
switchINT WIPER SW (COLUMN
ECU)OFF
06 Windshield
low-speed wiper
switchLO WIPER SW (COLUMN
ECU)OFF
07 Windshield
high-speed wiper
switchHI WIPER SW (COLUMN
ECU)ON
08 Windshield mist
wiper switchMIST WIPER SW
(COLUMN ECU)OFF
09 Windshield washer
switchFRONT WASH.SW
(COLUMN ECU)OFF
31 Ignition switch
(ACC)IG SW (ACC) (ETACS ECU) ON
70 Response by the
front-ECUFRONT ECU ACK (FRONT
ECU)NORMAL ACK or HI-BEAM
ACK
F.WIPER INT 05 Windshield
intermittent wiper
switchINT WIPER SW (COLUMN
ECU)ON
06 Windshield
low-speed wiper
switchLO WIPER SW (COLUMN
ECU)OFF
07 Windshield
high-speed wiper
switchHI WIPER SW (COLUMN
ECU)OFF
08 Windshield mist
wiper switchMIST WIPER SW
(COLUMN ECU)OFF
09 Windshield washer
switchFRONT WASH.SW
(COLUMN ECU)OFF
31 Ignition switch
(ACC)IG SW (ACC) (ETACS ECU) ON
37 Windshield
intermittent wiper
intervalINT WIPE TIME (ETACS
ECU)The diagnostic tool
MB991958 (MUT-III Sub
Assembly) displays
intermittent wiper interval in
response to the intermittent
wiper control positions.
70 Response by the
front-ECUFRONT ECU ACK (FRONT
ECU)NORMAL ACK or HI-BEAM
ACK
SWS DIAGNOSIS
SIMPLIFIED WIRING SYSTEM (SWS)54B-20
.
F.WIPER LO 05 Windshield
intermittent wiper
switchINT WIPER SW (COLUMN
ECU)OFF
06 Windshield
low-speed wiper
switchLO WIPER SW (COLUMN
ECU)ON
07 Windshield
high-speed wiper
switchHI WIPER SW (COLUMN
ECU)OFF
08 Windshield mist
wiper switchMIST WIPER SW
(COLUMN ECU)OFF
09 Windshield washer
switchFRONT WASH.SW
(COLUMN ECU)OFF
31 Ignition switch
(ACC)IG SW (ACC) (ETACS ECU) ON
70 Response by the
front-ECUFRONT ECU ACK (FRONT
ECU)NORMAL ACK or HI-BEAM
ACK
F.WIPER MIST 05 Windshield
intermittent wiper
switchINT WIPER SW (COLUMN
ECU)OFF
06 Windshield
low-speed wiper
switchLO WIPER SW (COLUMN
ECU)OFF
07 Windshield
high-speed wiper
switchHI WIPER SW (COLUMN
ECU)OFF
08 Windshield mist
wiper switchMIST WIPER SW
(COLUMN ECU)ON
09 Windshield washer
switchFRONT WASH.SW
(COLUMN ECU)OFF
31 Ignition switch
(ACC)IG SW (ACC) (ETACS ECU) ON
70 Response by the
front-ECUFRONT ECU ACK (FRONT
ECU)NORMAL ACK or HI-BEAM
ACK
F. W I P E R
WASH08 Windshield mist
wiper switchMIST WIPER SW
(COLUMN ECU)OFF
09 Windshield washer
switchFRONT WASH.SW
(COLUMN ECU)ON
31 Ignition switch
(ACC)IG SW (ACC) (ETACS ECU) ON
70 Response by the
front-ECUFRONT ECU ACK (FRONT
ECU)NORMAL ACK or HI-BEAM
ACK ITEM ITEM NO. INPUT SIGNAL DISPLAY ON
DIAGNOSTIC TOOLNORMAL CONDITION
SWS DIAGNOSIS
SIMPLIFIED WIRING SYSTEM (SWS)54B-21
LAMPING
ITEM ITEM NO. INPUT SIGNAL DISPLAY ON
DIAGNOSTIC TOOLNORMAL CONDITION
H/L AUTO-CUT 00 Headlight switch
HEADLAMP SW (COLUMN
ECU)Either is ON
01 Taillight switch TAILLAMP SW (COLUMN
ECU)
30 Ignition switch
(IG1)IG SW (IG1) (ETACS ECU) OFF
32 Front door switch FRONT DOOR SW (ETACS
ECU)ON
35 Headlight
automatic shutoff
functionH/L AUTO-CUT (ETACS
ECU)ON
70 Response by the
front-ECUFRONT ECU ACK (FRONT
ECU)NORMAL ACK or SLEEP
ACK
OFF 00 Headlight switch
HEADLAMP SW (COLUMN
ECU)OFF
01 Tail lamp switch TAILLAMP SW (COLUMN
ECU)OFF
03 Passing lamp
switchPASSING SW (COLUMN
ECU)OFF
30 Ignition switch
(IG1)IG SW (IG1) (ETACS ECU) ON or OFF
35 Headlight
automatic shutoff
functionH/L AUTO-CUT (ETACS
ECU)OFF
70 Response by the
front-ECUFRONT ECU ACK (FRONT
ECU)NORMAL ACK or SLEEP
ACK
HEADLAMP HI00 Headlight switch
HEADLAMP SW (COLUMN
ECU)ON
02 Dimmer switch DIMMER SW (COLUMN
ECU)ON or OFF
03 Passing lamp
switchPASSING SW (COLUMN
ECU)OFF
30 Ignition switch
(IG1)IG SW (IG1) (COLUMN
ECU)ON
35 Headlight
automatic shutoff
functionH/L AUTO-CUT (COLUMN
ECU)OFF
70 Response by the
front-ECUFRONT ECU ACK
(COLUMN ECU)HI-BEAM ACK
SWS DIAGNOSIS
SIMPLIFIED WIRING SYSTEM (SWS)54B-22
NOTE: When checking the input signals (off, tail,
low-beam or high-beam), turn the ignition switch to
the "ON" position in order to disable the headlamp
automatic shutoff function. However, since the
headlamp operation does not depend on the ignition
switch positions, the diagnostic tool MB991958
(MUT-III Sub Assembly) does not display the title "IGNITION SWITCH". HEADLAMP
LO00 Headlight switch
HEADLAMP SW (COLUMN
ECU)ON
03 Passing lamp
switchPASSING SW (COLUMN
ECU)OFF
30 Ignition switch
(IG1)IG SW (IG1) (ETACS ECU) ON or OFF
35 Headlight
automatic shutoff
functionH/L AUTO-CUT (ETACS
ECU)OFF
70 Response by the
front-ECUFRONT ECU ACK (FRONT
ECU)NORMAL ACK
PASSING
LAMP03 Passing lamp
switchPASSING SW (COLUMN
ECU)ON
70 Response by the
front-ECUFRONT ECU ACK (FRONT
ECU)NORMAL ACK or HI-BEAM
ACK
F.FOG LAMP 00 Headlight switch
HEADLAMP SW (COLUMN
ECU)ON
36 Front fog lamp
switchF.FOG LAMP (COLUMN
ECU)ON
35 Headlight
automatic shutoff
functionH/L AUTO-CUT (ETACS
ECU)OFF
30 Ignition switch
(IG1)IG SW (IG1) (ETACS ECU) ON or OFF
70 Response by the
front-ECUFRONT ECU ACK (FRONT
ECU)NORMAL ACK or HI-BEAM
ACK
TAIL LAMP 00 Headlight switch
HEADLAMP SW (COLUMN
ECU)OFF
01 Tail lamp switch TAILLAMP SW (COLUMN
ECU)ON
03 Passing lamp
switchPASSING SW (COLUMN
ECU)OFF
30 Ignition switch
(IG1)IG SW (IG1) (ETACS ECU) ON or OFF
35 Headlight
automatic shutoff
functionH/L AUTO-CUT (ETACS
ECU)OFF
70 Response by the
front-ECUFRONT ECU ACK (FRONT
ECU)NORMAL ACK ITEM ITEM NO. INPUT SIGNAL DISPLAY ON
DIAGNOSTIC TOOLNORMAL CONDITION
SWS DIAGNOSIS
SIMPLIFIED WIRING SYSTEM (SWS)54B-23
For checking item "HEADLAMP HI", the diagnostic
tool MB991958 (MUT-III Sub Assembly) displays
"OFF" on the item No.2 "DIMMER SW" when the
headlamps are at high-beam. Therefore, the
diagnostic tool MB991958 (MUT-III Sub Assembly)
should display "ON" momentarily when the dimmer
switch is operated.
.
TURN SIGNAL
.
BUZZER
NOTE: The headlamp automatic shutoff function
operates approximately one second after the lighting
monitor tone alarm starts sounding, and then the
tone alarm ceases sounding.
.
ITEM ITEM NO. INPUT SIGNAL DISPLAY ON
DIAGNOSTIC TOOLNORMAL CONDITION
TURN-SIG.LH 10 Turn-signal lamp
switch (RH)T/S RH SW (COLUMN
ECU)OFF
11 Tu r n - s i g n a l l a m p
switch (LH)T/S LH SW (COLUMN
ECU)ON
30 Ignition switch
(IG1)IG SW (IG1) (ETACS ECU) ON
TURN-SIG.RH 10 Turn-signal lamp
switch (RH)T/S RH SW (COLUMN
ECU)ON
11 Tu r n - s i g n a l l a m p
switch (LH)T/S LH SW (COLUMN
ECU)OFF
30 Ignition switch
(IG1)IG SW (IG1) (ETACS ECU) ON
ITEM ITEM NO. INPUT SIGNAL DISPLAY ON DIAGNOSTIC
TOOLNORMAL CONDITION
LGT
MONI.ALRM00 Headlamp switch
HEADLAMP SW (COLUMN
ECU)Either is ON
01 Tail lamp switch TAILLAMP SW (COLUMN
ECU)
30 Ignition switch
(IG1)IG SW (IG1) (ETACS ECU) OFF
32 Front door switch FRONT DOOR SW (ETACS
ECU)ON
35 Headlamp
automatic shutoff
functionH/L AUTO-CUT (ETACS
ECU)OFF
43 Tone alarm BUZZER (ETACS ECU) ON
OTHER
ALARM30 Ignition switch
(IG1)IG SW (IG1) (ETACS ECU) ON
43 Tone alarm BUZZER (ETACS ECU) ON