sensor LEXUS SC400 1991 Service Repair Manual

186
PPS (PROGRESSIVE POWER STEERING)
1H
12 1E 12 1I
9
IJ1
10
IK1
7IK1 6IG2
7
IJ2
6IJ2 16
12
10A
GAUGE
15A
E CU±IG
COMBINATION METER SPEED
SENSOR
NO. 1 PPS SOLENOID
PPS ECU
321 5 4
2
3
1 OUT
VCC GN D
Y SPD E SOL+ SOL±
+B
B±RY Y
PP W±BLG±B
LG±R
LG±B
LG±R
W±B
R
R L±R
Y
FROM POWER SOURCE SYSTEM
(
SEE PAGE 56 )
S3 P1
P2
C14
BR
13 15 10 1143D
13 3A
4
Y
IH IJ
B
2
A
2 SHORT
CONNECTOR
L±R L±R
S22 , S 2 3
BA
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11015
14
13 12
12345 123
GRAY GRAY
C14 P 1 P 2 S 3
X
2 2
BA
S22 S23
187
THE PPS (HYDRAULIC REACTION TYPE) CONTROLS THE HYDRAULIC PRESSURE APPLIED\
TO THE HYDRAULIC REACTION
CHAMBER IN THE GEAR BOX CONTROL UNIT USING THE PPS ECU, TO CHANGE THE STEERING FORCE AND PROVIDE OPTIMUM
STEERING FEELING AT ANY VEHICLE SPEED AND UNDER ANY STEERING CONDITIONS.
(PPS OPERATION)
WHEN THE IGNITION SW IS TURNED ON THE STARTING CURRENT FLOWS FROM THE ECU±IG FUSE TO TERMINAL 4 OF THE PPS
ECU. THE SPEED SENSOR MONITORS THE VEHICLE SPEED AND TRANSMITS CONTROL SIGNALS TO TERMINAL 3 OF THE ECU.
WHEN THE VEHICLE SPEED IS LOW, THE PPS ECU SENDS A HIGHER±VOLTAGE FROM TERMINAL 1 OF THE ECU " TERMINAL 1 OF
THE SOLENOID VALVE " TERMINAL 2 " TERMINAL 5 OF THE ECU " TERMINAL 2 " GROUND, INCREASING THE SOLENOID VALVE
OPENING ANGLE TO PROVIDE COMFORTABLE STEERING OPERATION. WHEN THE VEHICLE SPEED IS HIGH, THE PPS ECU
DECREASES THE SOLENOID VALVE OPENING ANGLE BY REDUCING THE VOLTAGE TO THE VALVE TO PROVIDE RESPONSIVE
STEERING FEELING.
P 1 PPS SOLENOID
1±2 : APPROX. 7.7
(25 °C, 77°F)
P 2 PPS ECU
4±GROUND : APPROX. 12 VOLTS WITH IGNITION SW AT ON POSITION
2±GROUND : ALWAYS CONTINUITY
1±5 : APPROX. 0.8A WITH VEHICLE SPEED BELOW 20 KM/H ( 12 MPH)
APPROX. 0.45A WITH VEHICLE SPEED AT 80 KM/H ( 48 MPH)
APPROX. 0.2A WITH VEHICLE SPEED ABOVE 160 KM/H ( 96 MPH)
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
C1428P 229S22B29
P 127S 327S23A29
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CODESEE PAGEJUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)
1E20INSTRUMENT PANEL WIRE
1H20COWL WIRE1I20COWL WIRE
3A22INSTRUMENT PANEL WIRE3D22INSTRUMENT PANEL WIRE
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CODESEE PAGEJOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)
IG236INSTRUMENT PANEL WIRE AND COWL WIRE (R/B NO. 5)
IJ136ENGINE WIRE AND COWL WIRE (RIGHT KICK PANEL)IJ236ENGINE WIRE AND COWL WIRE (RIGHT KICK PANEL)
IK136ENGINE WIRE AND INSTRUMENT PANEL WIRE (RIGHT KICK PANEL)
: GROUND POINTS
CODESEE PAGEGROUND POINTS LOCATION
IH36UNDER THE ASHTRAY LH
IJ36RIGHT KICK PANEL
SYSTEM OUTLINE
SERVICE HINTS
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154
POWER SEAT (w/ DRIVING POSITION MEMORY)
PRND 2 L146578 9
GR
R±B
L
G±W G
W
A/T INDICATOR SW
[NEUTRAL START SW AND BACK±UP LIGHT SW]
N1
IT1
12
1I
10 1H 12
1C
10 1H
1
A
6
STOP A
15
P
A
3 RCL+
A
10 RCL±
B
16 SSRS
B
14 SSRR
B
6 PVCC
B
5 SSFV
B
15 SSRV
2
3 13
1265
2 13 2
13
M
B28
B26 B27
BU1
7
Ba16
Ba1
8 1 2
IJ1
10
GR
V V
V
BR±B
BR±B BR±B
BR±B
BR±B
BR±BLG
V
Y±R Y±B
V
V±W
LG±R V
Y±G V
BR±B
G±W G±W G±W W
Y
GR
GR
Y
Y
VV LG±R
Y±G
V±W
Y±B
Y±R LG
FROM POWER SOURCE SYSTEM
(
SEE PAGE 56 )
15A
STOP 10A
GAUGE
STOP LIGHT
SW
POWER SEAT ECU
(FOR DRIVE R' S SEA T )
SLIDE
POSITION
SENSOR
( FOR
DRIVE R' S SEA T )POWER SEAT MOTOR
(
FOR DRIVER' S SEAT
RECLINING MOTOR
CONTROL ) FRONT
VERTICAL
POSITION
SENSOR
RE AR
VEATICAL
POSITION
SENSOR
S20
P16 F19 R19
P10 , P 1 1
S12
AB
B261
B
( M/T )
PARKING
BRAKE SW
P
3 (
A/T )
BR±B
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157
2 1
1
2 1
42
3
56 2
134
1 12151310 2 113
86516717 13 2
BX1
4
BX1
17 Bb1
6
Bb1
5 B29 B30
B29
B29
M
12
M
21
BL
Bb1
4
+B SLDF SLDR GND SLD+ SLD±
L±W
W±BBR
BR BR BR
BR
R
L± W
W±B
W±B W±B Y±R
Y±B
L±W L±WL±W
R
BR
B±Y
BR
LG ±R Y
V±W
LGV
L±Y
L±R
W±B L
L±B R
L±W
BR
SYSB PBCL SGND RRSW PFSW SLSW SSRS PVCC
BUCKLE SW
RH
RECLINING LIMIT
SW SLIDE LIMIT
SW
SLIDE POSITION SENSOR
( FOR PASSENGER' S SEAT )
POWER SEAT ECU(
FOR PASSENGER' S SEAT )
POWER SEAT CONTROL SW
( FOR PASSENGER' S SEAT )
POWER SEAT MOTOR
( FOR PASSENGER' S
SEAT RECLINING
CONTROL ) POWER SEAT MOTOR
(
FOR PASSENGER' S
SEAT SLIDE CONTROL )
P12
B5
R20 S19
S21
P9
P18 P19
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158
POWER SEAT (w/ DRIVING POSITION MEMORY)
CURRENT IS ALWAYS APPLIED FROM THE DOME FUSE TO TERMINAL SYSB OF THE POWER SEAT ECU, FROM DOOR FUSE TO
TERMINAL +B OF THE POWER SEAT ECU AND FROM STOP FUSE TO TERMINAL 2 OF THE STOP LIGHT SW.
WHEN THE IGNITION SW IS TURNED ON, CURRENT FLOWS FROM ECU±IG FUSE TO TERMINAL IG OF THE POWER SEAT ECU AND
FROM THE GAUGE FUSE TO TERMINAL 9 OF A/T INDICATOR SW.
POWER SEAT OPERATION (FOR DRIVER'S SEAT)
CURRENT IS ALWAYS APPLIED TO TERMINAL SYSB AND TERMINAL +B OF POWER SEAT ECU SO THAT THE POWER SEAT ECU IS
ALWAYS READY TO OPERATE.
WHEN THE POWER SEAT CONTROL SW IS PUSHED TO THE ªFRONT SIDE POSITIONº SIDE, A SIGNAL IS INPUT INTO TERMINAL
SLDF OF POWER SEAT ECU, THE ECU OPERATES AND THE CURRENT TO TERMINAL +B OF POWER SEAT ECU FLOWS FROM
TERMINAL SLD+ OF POWER SEAT ECU " TERMINAL 2 OF POWER SEAT MOTOR (FOR DRIVER'S SEAT SLIDE CONTROL) " MOTOR
TERMINAL 1 "TERMINAL SLD± OF POWER SEAT ECU "TERMINAL GND "GROUND, ROTATING THE POWER SEAT MOTOR SO
THAT THE SEAT SLIDES FORWARD WHILE THE POWER SEAT CONTROL SW IS BEING PRESSED.
TO SIDE THE DRIVER'S SEAT TO THE REAR, PUSHING THE POWER CONTROL SW TO THE ªREAR SLIDE POSITIONº SIDE, INPUTS A
SIGNAL TO TERMINAL SLDR OF POWER SEAT ECU. THIS CAUSES THE CURRENT FLOWING FROM THE ECU TO THE MOTOR TO
FLOW FROM TERMINAL SLD± OF POWER SEAT ECU " TERMINAL 2 OF POWER SEAT MOTOR (FOR DRIVER'S SEAT SLIDE
CONTROL) "MOTOR " TERMINAL 1 "TERMINAL SLD+ OF POWER SEAT ECU, FLOWING THE REVERSE TO FRONT SLIDE
OPERATION AND CAUSING THE MOTOR TO ROTATE IN REVERSE, SO THAT THE DRIVER'S SEAT MOVES TO THE REAR.
THE MOVEMENT TO OTHER POSITIONS OCCURS SIMILARLY, SO ONLY THE FLOW OF CURRENT TO EACH MOTOR IS SHOWN:
FRONT VERTICAL CONTROL 'UP' OPERATION
TERMINAL +B OF POWER SEAT ECU " TERMINAL FRV+ " TERMINAL 2 OF POWER SEAT MOTOR "MOTOR "TERMINAL 1 "
TERMINAL FRV± OF ECU " TERMINAL GND " GROUND .
FRONT VERTICAL CONTROL 'DOWN' OPERATION
TERMINAL +B OF POWER SEAT ECU " TERMINAL FRV± " TERMINAL 1 OF POWER SEAT MOTOR "MOTOR " TERMINAL 2 "
TERMINAL FRV+ OF ECU " TERMINAL GND " GROUND .
REAR VERTICAL CONTROL 'UP' OPERATION
TERMINAL +B OF POWER SEAT ECU " TERMINAL RRV+ " TERMINAL 2 OF POWER SEAT MOTOR "MOTOR " TERMINAL 1 "
TERMINAL RRV± OF ECU " TERMINAL GND " GROUND .
REAR VERTICAL CONTROL 'DOWN' OPERATION
TERMINAL +B OF POWER SEAT ECU " TERMINAL RRV± " TERMINAL 1 OF POWER SEAT MOTOR " MOTOR " TERMINAL 2 "
TERMINAL RRV+ OF ECU " TERMINAL GND " GROUND .
LUMBAR SUPPORT CONTROL 'FRONT' OPERATION
TERMINAL 7 OF POWER SEAT CONTROL SW " TERMINAL 4 OF LUMBAR SUPPORT SW " TERMINAL 1 " TERMINAL 11 OF POWER
SEAT CONTROL SW " TERMINAL 1 OF POWER SEAT MOTOR " MOTOR " TERMINAL 2 " TERMINAL 10 OF POWER SEAT
CONTROL SW " TERMINAL 2 OF LUMBAR SUPPORT SW "TERMINAL 3 "TERMINAL 12 OF POWER SEAT CONTROL SW "
GROUND .
LUMBAR SUPPORT CONTROL 'REAR' OPERATION
TERMINAL 7 OF POWER SEAT CONTROL SW " TERMINAL 4 OF LUMBAR SUPPORT SW " TERMINAL 2 " TERMINAL 10 OF POWER
SEAT CONTROL SW " TERMINAL 2 OF POWER SEAT MOTOR " MOTOR " TERMINAL 1 " TERMINAL 11 OF POWER SEAT
CONTROL SW " TERMINAL 1 OF LUMBAR SUPPORT SW "TERMINAL 3 "TERMINAL 12 OF POWER SEAT CONTROL SW "
GROUND .
THE NUMBER OF TURNS OF EACH MOTOR (AMOUNT OF MOVEMENT OF EACH PART OF THE SEAT) IS DETECTED BY THE POSITION
SENSORS AND INPUT TO THE ECU, MAKING IT POSSIBLE TO PERFORM MEMORY AND RETURN FUNCTIONS FOR THE SEAT
POSITION USING THE DRIVING POSITION MEMORY AND RETURN SWITCH.
POWER WALK±IN OPERATION (FOR PASSENGER'S SEAT)
WALK±IN OPERATION
WHEN THE WALK±IN PEDAL IS DEPRESSED OR THE RECLINING HANDLE IS LIFTED UP, THE SEAT BACK RECLINES FULLY
FORWARD AND RECLINING LIMIT SWITCH NO. 2 OPERATES, SO A SIGNAL IS INPUT TO TERMINAL RFSW OF THE POWER SEAT ECU
" TERMINAL SLD+ " TERMINAL 1 OF THE POWER SEAT MOTOR (FOR PASSENGER'S SEAT SLIDE CONTROL) " MOTOR "
TERMINAL 2 " TERMINAL SLD± OF THE ECU "TERMINAL GND " GROUND . THIS CAUSES THE SEAT TO SLIDE FORWARD 100 MM
IN THE WALK±IN MODE. HOWEVER, WHEN THE INITIAL SLIDE POSITION IS 100 MM OR LESS FROM THE MOST FORE POSITION, THE
SEAT CAN ONLY SLIDE FORWARD AS FAR AS THE MOST FORE POSITION.
SYSTEM OUTLINE
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165
1H
12
PRND 2 L
146578 9
B B BB BAA B AA A
2 1M
2 1 M
2
1
VC MSW E ASW TIS TIM+ TIM± VC TES E TEM+ TEM± Y
BR
R±W
GR
R±B
L
G±W G
W
R±W
BR
R±W BR R±W
V±Y
BR
V±W
P±L
R±B R±L
Y±R
L±B
L±Y
6
17 16 5 4 7 10 3 6 2 11 VC MSW E1 ASW TIS TIM+ TIM± TES TEM+ TEM±P
A/T INDICATOR SW
[NEUTRAL START SW AND
BACK±UP LIGHT SW]
TILT AND POWER TELESCOPIC ECU
TELESCOPIC
CONTROL MOTOR
TELESCOPIC POSITION
SENSOR
TILT CONTROL
MOTORTILT POSITION
SENSOR
AUTO SW
MANUAL SW TI L T
DOWN
TELESCO
SHORT
TI L T
UP
TELESCO
LONG
T7
BA
,T11
T10
TI L T AND POWE R TE LE SCOPI C UNI T [COMB. SW] C17 TELESCOPIC POSITION SENSOR
N1
10A
GAUGE
Y
FROM POWER SOURCE SYSTEM(
SEE PAGE 56 )
GR
IK 1
12 IJ1
10
BT1
18
B
2
1I
16
1D
8
6 3
DOOR OPEN
DETECTION SW LH GR
GR
Y
DS W
W±B
R±B
R±W
D10
4 6 8 7 5 1 10 6531 4
R
W
BL
R Y
W B
B
B
P±B
B±W
G±W R
G
3
BU1
7 1
(
A/T )
PARKING
BRAKE SW
B
( M/T )
I11 : A/T
I8:M/T
I11 : A/T
I8:M/T
P3
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166POWER TILT AND POWER TELESCOPIC
THIS SYSTEM OPERATES WITH BOTH THE TILT FUNCTION AND TELESCOPIC FUNCTION DRIVEN AUTOMATICALLY BY THE MOTOR
AND CONTROLLED BY THE ECU. THE STEERING CAN BE ADJUSTED STEPLESSLY FORWARD AND BACK, AND UP AND DOWN, TO
PROVIDE THE MOST SUITABLE STEERING POSITION FOR EASY DRIVING, WITH AUTOMATIC MOVEMENT OF THE STEERING TO A
POSITION WHICH FACILITATES GETTING IN AND OUT OF THE VEHICLE.
THE DRIVER CAN HAVE THE MOST APPROPRIATE DRIVING POSITION MEMORIZED BY OPERATING THE POWER SEAT AND REMOTE
CONTROL MIRROR TOGETHER WITH THE TILT AND POWER TELESCOPIC STEERING.
CURRENT IS ALWAYS APPLIED THROUGH THE
POWER FUSE TO TERMINAL +B OF THE TILT AND POWER TELESCOPIC ECU AND
THROUGH THE DOME FUSE TO TERMINAL BATT OF TILT AND POWER TELESCOPIC ECU.
WITH THE IGNITION SW TURNED ON, THE CURRENT FLOWS FROM ECU±IG FUSE TO TERMINAL IG AND FROM GAUGE FUSE TO
TERMINAL 9 OF A/T INDICATOR SW.
1. MANUAL TILT OPERATION
WHEN THE IGNITION KEY IS INSERTED INTO THE IGNITION KEY CYLINDER (UNLOCK WARNING SW ON), A SIGNAL IS INPUT TO
TERMINAL UWSW OF TILT AND POWER TELESCOPIC ECU. IF THE MANUAL SW IS PUSHED TO THE ªTILT UPº SIDE, CURRENT
FLOWS FROM TERMINAL VC OF TILT AND POWER TELESCOPIC ECU TO TERMINAL MSW OF TILT AND POWER TELESCOPIC ECU
PASSING THROUGH THE MANUAL SW. (THE ECU DETECTS THE MANUAL SW POSITION BY THE VOLUME OF CURRENT.)
AS A RESULT, TILT AND POWER TELESCOPIC ECU OPERATES AND THE CURRENT TO TERMINAL +B OF ECU FLOWS FROM
TERMINAL TIM+ " TERMINAL 1 OF COMB. SW " TERMINAL 2 OF TILT CONTROL MOTOR " TERMINAL 1 " TERMINAL 10 OF COMB.
SW "TERMINAL TIM± OF TILT AND POWER TELESCOPIC ECU " TERMINAL GND2 "GROUND , AND THE TILT UP FUNCTION
OPERATES AS LONG AS THE MANUAL SW IS PUSHED TO THE ªTILT UPº SIDE.
FOR ªTILT DOWNº OPERATION, WHEN THE MANUAL SW IS PUSHED TO THE DOWN SIDE, THE CURRENT FLOWING FROM ECU TO
MOTOR FLOWS TO TERMINAL TIM± OF TILT AND POWER TELESCOPIC ECU "TERMINAL 10 OF COMB. SW "TERMINAL 1 OF TILT
CONTROL MOTOR "TERMINAL 2 "TERMINAL 1 OF COMB. SW "TERMINAL TIM+ OF TILT AND POWER TELESCOPIC ECU, SO THE
MOTOR ROTATES IN THE REVERSE DIRECTION TO TILT UP OPERATION, AND TILT DOWN OPERATION OCCURS ONLY WHILE THE
MANUAL SW IS BEING PUSHED.
2. MANUAL TELESCOPIC OPERATION
WHEN THE IGNITION KEY IS INSERTED INTO THE IGNITION KEY CYLINDER (UNLOCK WARNING SW ON), A SIGNAL IS INPUT TO
TERMINAL UWSW OF TILT AND TELESCOPIC ECU. WHEN THE MANUAL SW IS PUSHED TOWARD ªTELESCOPIC SHORTº SIDE,
CURRENT FLOWS FROM TERMINAL VC OF TILT AND POWER TELESCOPIC ECU TO TERMINAL MSW OF TILT AND POWER
TELESCOPIC ECU THROUGH THE MANUAL SW.
AS A RESULT, THE TILT AND POWER TELESCOPIC ECU OPERATES AND THE CURRENT TO TERMINAL +B OF TILT AND POWER
TELESCOPIC ECU FLOWS FROM TERMINAL TEM+ OF TILT AND POWER TELESCOPIC ECU "TERMINAL 1 OF COMB. SW "
TERMINAL 2 OF TELESCOPIC CONTROL MOTOR "TERMINAL 1 "TERMINAL 4 OF COMB. SW "TERMINAL TEM± OF TILT AND
POWER TELESCOPIC ECU " TERMINAL GND2 "GROUND , AND ªTELESCOPIC SHORTº OPERATION OCCURS AS LONG AS THE
MANUAL SW IS PUSHED THE TO ªTELESCOPIC SHORTº SIDE.
FOR ªTELESCOPIC LONGº OPERATION, WHEN THE MANUAL SW IS PUSHED TO THE TELESCOPIC LONG SIDE, CURRENT FLOWING
FROM TILT AND POWER TELESCOPIC ECU TO THE MOTOR FLOWS THROUGH TERMINAL TEM± OF TILT AND POWER TELESCOPIC
ECU " TERMINAL 4 OF COMB. SW "TERMINAL 1 OF TELESCOPIC CONTROL MOTOR "TERMINAL 2 " TERMINAL 1 OF COMB. SW
" TERMINAL TEM+ OF TILT AND POWER TELESCOPIC ECU "TERMINAL GND2 "GROUND .
AS A RESULT, THE MOTOR ROTATES IN REVERSE TO THE TELESCOPIC SHORT MODE AND TELESCOPIC LONG OPERATION
OCCURS AS LONG AS THE MANUAL SW IS PUSHED TO THE ªTELESCOPIC LONGº SIDE.
3. AUTO AWAY OPERATION
WHEN THE IGNITION SW IS TURNED FROM ON TO OFF, THE CURRENT STOPS FLOWING FROM ECU±IG TO TERMINAL IG OF TILT
AND POWER TELESCOPIC ECU AND IS INPUT AS A SIGNAL THAT THE IGNITION SW IS OFF. WHEN THE AUTO SW IS TURNED ON, AN
ªAUTO SW ONº SIGNAL IS INPUT TO TERMINAL ASW OF TILT AND POWER TELESCOPIC ECU.
IF THE IGNITION KEY IS REMOVED FROM THE IGNITION KEY CYLINDER (UNLOCK WARNING SW OFF) AT THIS TIME, A SIGNAL IS
INPUT FROM TERMINAL UWSW OF TILT AND POWER TELESCOPIC ECU. ALSO, THE TILT POSITION SENSOR (COMB. SW) INPUTS
INTO TERMINAL TIS OF THE TILT AND TELESCOPIC ECU A SIGNAL OF THE STEERING TILT POSITION JUST BEFORE THE IGNITION
SW (FOR UNLOCK WARNING) IS TURNED FROM ON TO OFF.
AS A RESULT, THE TILT AND POWER TELESCOPIC ECU OPERATES AND THE CURRENT TO TERMINAL +B OF TILT AND POWER
TELESCOPIC FLOWS FROM TERMINAL TIM+ OF TILT AND POWER TELESCOPIC ECU "TERMINAL 1 OF COMB. SW "TERMINAL 2
OF TILT CONTROL MOTOR "TERMINAL 1 "TERMINAL 10 OF COMB. SW "TERMINAL TIM± OF TILT AND POWER TELESCOPIC ECU
" TERMINAL GND2 "GROUND , CAUSING THE MOTOR TO ROTATE SO THAT ªTILT UPº OPERATION OCCURS AUTOMATICALLY.
AT THE SAME TIME, THE CURRENT FROM TERMINAL +B OF TILT AND POWER TELESCOPIC ECU TO TERMINAL TEM+ FLOWS FROM
TERMINAL 1 OF COMB. SW "TERMINAL 2 OF TELESCOPIC CONTROL MOTOR "TERMINAL 1 "TERMINAL 4 OF COMB. SW "
TERMINAL TEM± OF TILT AND POWER TELESCOPIC ECU "TERMINAL GND2 "GROUND , CAUSING THE MOTOR TO ROTATE SO
THAT TELESCOPIC SHORT OPERATION OCCURS ON AUTO AND WITH TILT UP OPERATION OCCURRING SIMULTANEOUSLY ON
AUTO, AUTO AWAY OPERATION OCCURS.
SYSTEM OUTLINE
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167
4. AUTO RETURN OPERATION
WHEN THE STEERING IS IN ªAUTO AWAYº CONDITION AND THE IGNITION KEY IS INSERTED INTO THE IGNITION KEY CYLINDER
(UNLOCK WARNING SW ON), A SIGNAL IS INPUT TO TERMINAL UWSW OF TILT AND POWER TELESCOPIC ECU.
AS A RESULT, THE TILT AND POWER TELESCOPIC ECU OPERATES AND THE CURRENT TO TERMINAL +B OF TILT AND POWER
TELESCOPIC ECU FLOWS FROM TERMINAL TEM± OF TILT AND POWER TELESCOPIC ECU "TERMINAL 4 OF COMB. SW "
TERMINAL 1 OF TELESCOPIC CONTROL MOTOR "TERMINAL 2 " TERMINAL 1 OF COMB. SW " TERMINAL TEM+ OF TILT AND
POWER TELESCOPIC ECU " TERMINAL GND2 "GROUND , AND AT THE SAME TIME, CURRENT FLOWS FROM TERMINAL TIM± OF
TILT AND POWER TELESCOPIC ECU "TERMINAL 10 OF COMB. SW "TERMINAL 1 OF TILT CONTROL MOTOR "TERMINAL 2 "
TERMINAL 1 OF COMB. SW "TERMINAL TIM+ OF TILT AND POWER TELESCOPIC ECU "TERMINAL GND2 "GROUND , CAUSING
BOTH THE TILT CONTROL MOTOR AND TELESCOPIC CONTROL MOTOR TO ROTATE. THE MOTORS CONTINUE TO ROTATE UNTIL
THE SIGNALS INPUT FROM THE TILT POSITION SENSOR TO TERMINAL TIS OF TILT AND POWER TELESCOPIC ECU AND FROM THE
TELESCOPIC POSITION SENSOR TERMINAL TES OF TILT AND POWER TELESCOPIC ECU (SIGNALS INFORMING THE ECU OF THE
CURRENT POSITION OF THE STEERING) MATCH THE POSITION MEMORIZED BY THE ECU PRIOR TO AUTO AWAY OPERATION.
IN THIS WAY, THE STEERING POSITION IS AUTOMATICALLY RETURNED TO THE ORIGINAL POSITION.
WHEN THE IGNITION SW IS TURNED FROM OFF TO ON OR THE SHIFT LEVER IS SHIFTED TO A POSITION OTHER THAN P OR N,
AUTO OPERATION IS STOPPED.
C15 TILT AND POWER TELESCOPIC UNIT [COMB. SW]
4±6 : APPROX. 160
WITH TELESCOPIC LONG OPERATION
: APPROX. 360
WITH TILT UP OPERATION
: APPROX. 790
WITH TELESCOPIC SHORT OPERATION
: APPROX. 2.0K
WITH TILT DOWN OPERATION
8±7 : CONTINUITY WITH AUTO SW OFF
8±4 : APPROX. 5K

T 7 (D) TELESCOPIC POSITION SENSOR
6±3 : APPROX. 5K

D10 DOOR LOCK MOTOR, DOOR UNLOCK DETECTION SW AND DOOR OPEN DETECTION SW LH
3±6GROUND :CLOSED WITH FRONT DOOR LH OPEN
D12 DRIVING POSITION MEMORY AND RETURN SW
2±3 : CLOSED WITH DRIVING POSITION MEMORY SW (NO. 1) ON
1±3 : CLOSED WITH DRIVING POSITION MEMORY SW (NO. 2) ON
4±3 : CLOSED WITH DRIVING POSITION MEMORY SW (SET) ON
I15 UNLOCK WARNING SW [IGNITION SW]
9±10: CLOSED WITH IGNITION KEY IN CYLINDER
N 1 A/T INDICATOR SW [NEUTRAL START SW]
9±1 : CLOSED WITH SHIFT LEVER AT P POSITION
T10, T11 TILT AND POWER TELESCOPIC ECU
(A) 4±GROUND : ALWAYS APPROX. 12 VOLTS
(A) 1±GROUND : APPROX. 12 VOLTS WITH IGNITION SW AT ON POSITION
(B) 18±GROUND : ALWAYS APPROX. 12 VOLTS
(A) 6±GROUND : APPROX. 12 VOLTS WITH IGNITION SW ON AND SHIFT LEVER AT ªPº RANGE
(B) 10±GROUND : CONTINUITY WITH IGNITION KEY IN CYLINDER
(A) 7±GROUND : ALWAYS CONTINUITY
(B) 8±GROUND : ALWAYS CONTINUITY
(B) 2±GROUND : CONTINUITY WITH FRONT DOOR LH OPEN
(B) 3±GROUND : CONTINUITY WITH DRIVING POSITION MEMORY SW (NO. 1) ON
(B) 12±GROUND : CONTINUITY WITH DRIVING POSITION MEMORY SW (NO. 2) ON
(B) 11±GROUND : CONTINUITY WITH DRIVING POSITION MEMORY SW (SET) ON
(A) 10±GROUND : APPROX. 12 VOLTS WITH TILT UP OPERATION
(A) 3±GROUND : APPROX. 12 VOLTS WITH TILT DOWN OPERATION
(A) 2±GROUND : APPROX. 12 VOLTS WITH TELESCOPIC SHORT OPERATION
(A) 11±GROUND : APPROX. 12 VOLTS WITH TELESCOPIC LONG OPERATION
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
C1728N 127T 732
D1030P 329T10B29
D1230P1127T11A29
I1529R 732
SERVICE HINTS
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172
REMOTE CONTROL MIRROR (w/ DRIVING POSITION MEMORY)
CURRENT IS ALWAYS APPLIED TO TERMINAL +B OF REMOTE CONTROL MIRROR ECU THROUGH THE ECU±B FUSE.
WHEN THE IGNITION SW IS TURNED TO ON OR ACC POSITION, THE CURRENT FLOWS TO TERMINAL ACC OF THE REMOTE
CONTROL MIRROR ECU THROUGH THE RADIO NO. 2 FUSE.
REMOTE CONTROL MIRROR OPERATION
WHEN THE IGNITION SW IS TURNED TO ON OR ACC POSITION, THE REMOTE CONTROL MIRROR ECU OPERATES. WHEN THE
SELECT SW OF THE REMOTE CONTROL MIRROR SW IS MOVED TO THE LH POSITION AND THE OPERATION SW IS MOVED TO
ªLEFTº SIDE, A SIGNAL IS INPUT FROM TERMINAL SWO2 OF REMOTE CONTROL MIRROR ECU TO TERMINAL 2 OF REMOTE
CONTROL MIRROR SW " TERMINAL 12 "TERMINAL SWI2 OF ECU.
AS A RESULT, THE CURRENT TO TERMINAL +B OF ECU FLOWS FROM TERMINAL MHL OF ECU "TERMINAL 1 OF REMOTE
CONTROL MIRROR LH " MOTOR " TERMINAL 2 "TERMINAL M+L OF ECU "TERMINAL GND "GROUND , ROTATING THE MOTOR
TO ADJUST THE ANGLE OF THE LEFT SIDE OF THE OUTER MIRROR (DRIVER'S).
TO CHANGE THE ANGLE OF THE RIGHT SIDE OF THE MIRROR, THE OPERATION SW OF THE REMOTE CONTROL MIRROR SW IS
MOVED TO THE ªRIGHTº SIDE.
THEN, A SIGNAL IS INPUT FROM TERMINAL SWO2 OF REMOTE CONTROL MIRROR ECU " TERMINAL 2 OF REMOTE CONTROL
MIRROR SW " TERMINAL 8 "TERMINAL SWI1 OF ECU. AS A RESULT, THE CURRENT TO TERMINAL +B OF REMOTE CONTROL
MIRROR ECU FLOWS FROM TERMINAL M+L OF ECU " TERMINAL 2 OF REMOTE CONTROL MIRROR " MOTOR " TERMINAL 1 "
TERMINAL MHL OF ECU " TERMINAL GND " GROUND, CAUSING THE ANGLE OF THE OUTER MIRROR (DRIVER'S) TO CHANGE ON
THE RIGHT SIDE.
THE MOVEMENT TO OTHER POSITIONS OCCURS SIMILARLY, SO ONLY THE CURRENT FLOW TO EACH MOTOR IS SHOWN:
SELECT SW RH POSITION, OPERATION SW LEFT POSITION
TERMINAL +B OF REMOTE CONTROL MIRROR ECU "TERMINAL MHR "TERMINAL 1 OF REMOTE CONTROL MIRROR " MOTOR "
TERMINAL 2 "TERMINAL M+R OF ECU "TERMINAL GND "GROUND .
SELECT SW RH POSITION, OPERATION SW RIGHT POSITION
TERMINAL +B OF REMOTE CONTROL MIRROR ECU "TERMINAL M+R "TERMINAL 2 OF REMOTE CONTROL MIRROR " MOTOR "
TERMINAL 1 "TERMINAL MHR OF ECU " TERMINAL GND "GROUND .
SELECT SW LH POSITION, OPERATION SW UP POSITION
TERMINAL +B OF REMOTE CONTROL MIRROR ECU " TERMINAL MVL " TERMINAL 3 OF REMOTE CONTROL MIRROR " MOTOR "
TERMINAL 2 "TERMINAL M+L OF ECU "TERMINAL GND "GROUND .
SELECT SW LH POSITION, OPERATION SW DOWN POSITION
TERMINAL +B OF REMOTE CONTROL MIRROR ECU "TERMINAL M+L "TERMINAL 2 OF REMOTE CONTROL MIRROR " MOTOR "
TERMINAL 3 "TERMINAL MVL OF ECU " TERMINAL GND "GROUND .
SELECT SW RH POSITION, OPERATION SW UP POSITION
TERMINAL +B OF REMOTE CONTROL MIRROR "TERMINAL MVR "TERMINAL 3 OF REMOTE CONTROL MIRROR " MOTOR "
TERMINAL 2 "TERMINAL M+R OF ECU "TERMINAL GND "GROUND .
SELECT SW RH POSITION, OPERATION SW DOWN POSITION
TERMINAL +B OF REMOTE CONTROL MIRROR "TERMINAL M+R "TERMINAL 2 OF REMOTE CONTROL MIRROR " MOTOR "
TERMINAL 3 "TERMINAL MVR OF ECU " TERMINAL GND "GROUND .
THE NUMBER OF TURNS OF EACH MOTOR (AMOUNT OF MOVEMENT OF EACH PART OF THE MIRROR) IS DETECTED BY THE
POSITION SENSORS AND INPUT TO THE ECU, MAKING IT POSSIBLE TO PERFORM MEMORY AND RETURN FUNCTIONS FOR THE
MIRROR POSITION USING THE DRIVING POSITION MEMORY AND RETURN SWITCH.
SYSTEM OUTLINE
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177
SRS AIRBAG
NOTICE: When inspecting or repairing the SRS AIRBAG, perform the operation in accord\
ance with the
following precautionary instructions and the procedure and precautions in the Repair Manual for the applicable
model year.

Malfunction symptoms of the airbag system are difficult to confirm, so the diagnostic codes become the most
important source of information when troubleshooting.
When troubleshooting the airbag system, always inspect the diagnostic codes before disconnecting the
battery.

Work must be started after 30 seconds or longer from the time the Ignition SW is set to the ªLOCKº position
and the negative (±) terminal cable is disconnected from the battery.
(The airbag system is equipped with a back±up power source so that if work is started within 30 seconds of
disconnecting the negative (±) terminal cable of the battery, the airbag may be deployed.)
When the negative (±) terminal cable is disconnected from the battery, memory of the clock and audio systems
will be cancelled. So before starting work, make a record of the contents memorized by each me\
mory system.
Then when work is finished, reset the clock and audio system as before.
When the vehicle has tilt and telescopic steering, power seat, outside r\
ear view mirror and power shoulder
belt anchorage, which are all equipped with memory function, it is not possible to make a record of the memory
contents. So when the operation is finished, it will be necessary to explain this\
fact to the customer, and
request the customer to adjust the features and reset the memory.
To avoid erasing the memory of each memory system, never use a back±up \
power supply from outside the
vehicle.

When removing the steering wheel pad or handling a new steering wheel pad, keep the pad upper surfa\
ce
facing upward. Also, lock the lock lever of the twin lock type connector\
at the rear of the pad and take care
not to damage the connector.
(Storing the pad with its metallic surface up may lead to a serious accident if \
the airbag inflates for some
reason).

Store the steering wheel pad where the ambient temperature remains below\
93 °C (200 °F), without high
humidity and away from electrical noise.

Never use airbag parts from another vehicle. When replacing airbag parts\
, replace them with new parts.

Never disassemble or repair the steering wheel pad, center airbag sensor asse\
mbly or front airbag sensors.

Before repairing the body, remove the airbag sensors if during repair shocks are likely to be app\
lied to the
sensors due to vibration of the body or direct tapping with tools or oth\
er parts.

Do not reuse a steering wheel pad or front airbag sensors.
After evaluating whether the center airbag sensor assembly is damaged or not, decide whether or not to reuse
it. (See the Repair Manual for the method for evaluating the center airbag\
sensor assembly.)

When troubleshooting the airbag system, use a high±impedance (Min. 1\
0k W/V) tester.

The vehicle wiring harness exclusively for the airbag system is distinguish\
ed by corrugated yellow tubing, as
are the connectors.

Do not measure the resistance of the airbag squib.
(It is possible this will deploy the airbag and is very dangerous.)

If the wire harness used in the airbag system is damaged, replace the wh\
ole wire harness assembly.
When the connector to the airbag front sensors can be repaired alone (when \
there is no damage to the wire
harness), use the repair wire specially designed for the purpose.
(Refer to the Repair Manual for the applicable Model year for details o\
f the replacement method.)

INFORMATION LABELS (NOTICES) are attached to the periphery of the airbag componen\
ts. Follow the
instructions on the notices.
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