LEXUS SC400 1991 Service Repair Manual

SERVICE HINTS FOR REFRIGERANT LEAK DETECTIONPage 2 of 3
B.Checking for leakage at the evaporator: The evaporator drain hose provides an
excellent access point to check for refrigerant leakage from the evapora\
tor. Be sure
to raise the vehicle on a lift so that the evaporator is as far as possi\
ble from any
petrochemical source that may be on the shop floor. When leak checking in this area,
turn the system off, pinch off the evaporator drain hose, and wait 10 to 15 minutes to
allow the refrigerant to accumulate in the evaporator case. When the s\
ystem is ready
to check, release the drain hose and hold the leak detector wand about 1\
/4 inch below
the drain opening (see diagram).
NOTE: Do not allow the leak detector tip to come in contact with water from th\
e evaporator.
C. Checking for leakage at front compressor seal:
Front compressor seal leaks are
probably the most difficult leaks to detect accurately. Special diagnostic procedures must be followed
for the best success. Make sure the system is fully charged. Operate the \
system with a pressure gauge
installed and assure that the system has correct system pressures. Shut off the engine. Begin the
leak check by placing the detector probe along the bottom half of the compr\
essor clutch. Move the wand
slowly across the bottom of the compressor clutch. Be careful not to expose t\
he detector wand tip to
any oil residue as this may cause a false leakage reading.
Evaporator
Drain Hose
Verify correct system pressure. Move dectector wand slowly across the
bottom half of the compressor clutch.
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SERVICE HINTS FOR REFRIGERANT LEAK DETECTIONPage 3 of 3
D. Checking for leakage at service valves or pressure switches:
Small accumulations of refrigerant gas under the service valve caps or p\
ressure switch connectors is
normal. When checking for leaks at these points, use the following proc\
edures to assure the highest
accuracy:
1. Remove the service valve cap or pressure switch connector.
2. Allow the service valve or pressure switch to remain uncapped for approx\
imately
20 minutes. This will allow the air to circulate and carry away the acc\
umulated
refrigerant. (This is a good time to leak check other areas of the syst\
em).
3. Do not use compressed air to flush out the service valve or pressure swi\
tch
cavity. Petroleum residue from inline oilers or compressor lubrication may ca\
use
false readings.
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Some SC 300/SC 400 vehicles may have a sunvisor which falls away slightly from the roof
when placed in the full upright position. To improve visor retention, the position of an internal
clip has been modified in production.
BODY
BO92±004
APRIL 24, 1992
SC 300/SC 400
PART NUMBER INFORMATION:
New Part NumberPrev. Part NumberDescriptionSide
NOTE:Before replacing the Sunvisor assembly, ensure that shaft is fully seated into the
sunvisor by pushing the sunvisor further onto the shaft. This may
seat the internal clip into
the groove on the shaft.
PRODUCTION EFFECTIVE:
FROM: November, 1991
VIN: SC 400: JT8UZ30C9N0011202
SC 300: JT8JZ30C9N0002890
Same
º
º
Same
º
º
Same
º
º
Same
º
º Medium Gray
SpruceIvory
SC 300/SC 400 IMPROVED SUNVISOR HINGE RETENTION (REVISED) Page 1 of 1
Medium Gray
SpruceIvory
Medium Gray SpruceIvory
Medium Gray SpruceIvory RH
RH
RH
RH w/Sunroof
RH w/Sunroof
RH w/Sunroof LH
LH
LH
LH w/Sunroof
LH w/Sunroof
LH w/Sunroof
74310±24120±03
74310±24120±07
74310±24120±08
74310±24130±03
74310±24130±07
74310±24130±08
74320±24130±03
74320±24130±07
74320±24130±08
74320±24080±03
74320±24080±07
74320±24080±08
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Lexus Supports ASE CertificationPage 1 of 5
Title:
SUSPENSION BALL JOINT INSPECTION
Models:
Applicable Models
Technical Service
Information Bulletin
October 11, 2002
PG012-02
This Service Bulletin is to inform you of the inspection method, and free pl\
ay
specification figures for suspension ball joints. The on±vehicle insp\
ection methods
have been standardized.
1990 ± 2000 model year LS 400 vehicles.
2001 ± 2003 model year LS 430 vehicles.
1993 ± 2003 model year GS 300 vehicles.
1998 ± 2000 model year GS 400 vehicles.
2001 ± 2003 model year GS 430 vehicles.
1992 ± 2000 model year SC 300 & SC 400 vehicles.
2002 ± 2003 model year SC 430 vehicles.
2001 ± 2003 model year IS 300 vehicles.
1999 ± 2003 model year RX 300 vehicles.
1990 ± 2003 model year ES 250 & ES 300 vehicles.
1998 ± 2003 model year LX 470 vehicles.
OP CODEDESCRIPTIONTIMEOFPT1T2
N/ANot Applicable to Warranty±±±±
PRODUCT GENERAL INFORMATION
Introduction
Applicable Vehicles
Warranty
Information
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SUSPENSION BALL JOINT INSPECTION ± PG012-02 October 11, 2002
Page 2 of 5
MODELLOCATION
LOWER BALL JOINT OR SUSPENSION
BALL JOINTUPPER BALL JOINT
MODELLOCATIONINSP.
METHODMAX. PLAYTURNING TORQUEINSP.
METHODMAX. PLAYTURNING TORQUE
LS 400
(UCF10)
Front1±(A)0.016 in.
(0.4) mm4 in. lbf
(0.5 N m)
or Less
(UCF10)
1990±1994
Rear3No Play Felt31 in. lbf
(3.5 N m)
or Less
LS 400
(UCF20)
Front1±(A)0.016 in.
(0.4) mm22 in. lbf
(2.5 N m)
or Less
(UCF20)
1995±2000Rear3No Play Felt31 in. lbf
(3.5 N m)
or Less
LS 430
(UCF30)
Front1±(A)No Play Felt31 in. lbf
(3.5 N m)
or Less
(UCF30)
2001±2003Rear3No Play Felt31 in. lbf
(3.5 N m)
or Less
GS 300
(JZS147)
Front1±(A)0.016 in.
(0.4) mm27 in. lbf
(3.0 N m)
or Less
2No Play31 in. lbf
(3 5 N m)(JZS147)
1993±1997Rear1±(A)No Play
Felt31 in. lbf
(3.5 N m)
or Less2No Play
Felt(3.5 N m)
or Less
GS 300, 400, 430
(JZS16#
Front1±(A)0.016 in.
(0.4) mm27 in. lbf
(3.0 N m)
or Less
(JZS16#,
UZS16#)
1998±2003
Rear3No Play Felt31 in. lbf
(3.5 N m)
or Less
SC 300, 400
(JZZ31,
Front1±(A)0.016 in.
(0.4) mm27 in. lbf
(3.0 N m)
or Less
(JZZ31,
UZZ30)
1992±2000
Rear1±(A)No Play Felt31 in. lbf
(3.5 N m)
or Less
SC 430
(UZZ40)
Front1±(A)0.016 in.
(0.4) mm27 in. lbf
(3.0 N m)
or Less
(UZZ40)
2002±2003
Rear3No Play Felt31 in. lbf
(3.5 N m)
or Less
Inspection
Information
Table
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SUSPENSION BALL JOINT INSPECTION ± PG012-02 October 11, 2002
Page 3 of 5
MODELLOCATION
LOWER BALL JOINT OR SUSPENSION
BALL JOINTUPPER BALL JOINT
MODELLOCATIONINSP.
METHODMAX. PLAYTURNING TORQUEINSP.
METHODMAX. PLAYTURNING TORQUE
IS 300
(JCE10)
Front1±(A)0.016 in.
(0.4) mm27 in. lbf
(3.0 N m)
or Less
2No Play
31 in. lbf
(3.5 N m)
or Less
(JCE10)
2001±2003
Rear3No Play Felt31 in. lbf
(3.5 N m)
or Less2No Play
Felt27 in. lbf
(3.0 N m)
or Less
RX 300
(MCU10, 15)
1999 2003
Front1±(B)No Play Felt31 in. lbf
(3.5 N m)
or Less
N/AN/AN/A
1999±2003RearN/AN/AN/AN/AN/AN/A
ES 250 & 300 (VZV21,
MCV20, 30)Front1±(B)No Play Felt31 in. lbf
(3.5 N m)
or Less
N/AN/AN/A
MCV20, 30)
1990±2003RearN/AN/AN/AN/AN/AN/A
LX 470
(UZJ100)
1998 2003
Front1±(A)No Play Felt27 in. lbf
(3.0 N m)
or Less
2No Play Felt40 in. lbf
(4.5 N m)
or Less
1998±2003RearN/AN/AN/AN/AN/AN/A
NOTE:
Be sure to check the table for the
applicable inspection type based on
the vehicle model.
Refer to the table for the standard
free play values.
1. Inspect Lower Ball Joint Free Play
A. Move the hub up and down byhand (Most models with
wish±bone suspension):
a. Remove the tire.
b. Install the 2 lug nuts.
c. Inspect the free play while moving the lug nuts up and
down at a force of 67 lbf
(294 N, 30 kgf).
Inspection
Information
Table
(Continued)
Free Play
Inspection
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SUSPENSION BALL JOINT INSPECTION ± PG012-02 October 11, 2002
Page 4 of 5
B. Move the lower arm by hand (All
models with strut type suspension
and some models with wish±bone
type suspension):
a. Lift up the vehicle.
b. Inspect the free play while moving the lower arm up and
down at a force of 67 lbf
(294 N, 30 kgf).
2. Inspect Upper Ball Joint Play Move the upper arm by hand (Models
where the LOWER control arm are
linked by a torsion bar, and all models
using a coil spring.
A. Remove the front tire.
B. Inspect the free play while moving the upper arm up and down at a
force of 67 lbf (294 N, 30 kgf).
3. Inspect the Suspension Arm Ball Joint Free Play
A. Lift up the vehicle.
B. Inspect the free play while moving the control arm by hand.
(Reference)
Free Play Inspection Method
(Gauge Installation) Position the dial gauge between the
arm (upper or lower) and the knuckle,
and measure free play.
(This illustration shows how to
measure free play for vehicles with
double wishbone type suspension
with coil spring).
Inspect Ball Joint Dust Cover
Check for cracks and grease leaks on the
dust cover (boots).Free Play
Inspection
(Continued)
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SUSPENSION BALL JOINT INSPECTION ± PG012-02 October 11, 2002
Page 5 of 5
Inspect Ball Joint Turning Torque
Move the stud back and forth 5 times,
then turn the stud continuously at 3±5
seconds per turn, and measure the
turning torque at the 5th turn.
HINT:
Refer to the table for standard values
for the turning torque.
Turning
Torque
Inspection
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11 8
WIRELESS DOOR LOCK REMOTE CONTROL
7 6 10 542931
2 1
2
1E
11
1D
84
1J
1
1B
5
1I
64
1H
13
1D10 3E
7
3A 6
2
3
BY17
IP 1 20
BX1
2 BX1 11 BX1 8 BX19BX116 BX1 15 BX1 3
I8
I15
I7
B4 B7
9
10
6 3 6
3
BL IF IJ IP1
15
E KSW DSW D L1 LSWD1
UL1 LSWD2 LSWP
P±B
W±L
G± W
G±Y
L±W
W±B
W±B
W±B
W±B
W±B G±L
R±L
R
R
R
R±L
P±B
W±L L±W
G±W G±Y
G±W L±W G±Y
G±Y
G±W G±L
R±W Y
G±LY
W±B
G±L
R±W
R±W
W±B
W±B
W±B
W±B
W±B W±B
FROM POWER SOURCE SYSTEM
(
SEE PAGE 56 )
10A
DOME
+B
WIRE LES S DOOR LOCK E CU
WIRE LES S DOOR LOCK
MAIN SW
UNLOCK WARNING SW
[IGNITION SW]
DOOR OPEN
DE TE CTION SW LH
DOOR OPEN
DE TE CTION SW RH
INTEGRATION
RELAY DIODE
TO DOOR LOCK
AND UNLOCK SW LH
TO DOOR LOCK
AND UNLOCK SW RH
W8
I15
D10
D11
W7
2
1
4
6 IF2
15
IP 1
19
G±Y
G±W
I15
G±Y
TO DOOR LOCK
AND UNLOCK SW RH
IP1
8
G±Y
G±Y
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11 9
1K
7
15 14 11 7 3 4 16 8
2 1 4 4
IP17
IF2 7
I2 I8
I11
I11IF
IF2
16 IF2 18 IP1 6IP118
4 1 M
5
2
4
1 M
5
2
UL1 L1 LSWD LSWP ACT± ACT+ E
P±B
L±W
P±B
W±L
G±W
G±Y
L±W
W±B
W±B L±R
L±R
L±W
G±W
G±Y
W±L
P±B
L±W
L±R
W±B
L±W
L±W
L±W
P±B
L±W
W±B
L±R L±R W±L
L±R
W±B
FROM POWER SOURCE SYSTEM (
SEE PAGE 56 )
30A
DOOR
+B2
THEFT DETERRENT AND DOOR LOCK ECU
L±W
L±W
P±B
L±W
DOOR LOCK MOTOR,
DOOR UNLOCK DETECTION SW AND
DOOR OPEN DETECTION SW LH
DOOR LOCK MOTOR,
DOOR UNLOCK DETECTION SW AND
DOOR OPEN DETECTION SW RH
DIODE
D10
D11
T9 6 5
I15
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