1991 LEXUS SC400 Service Repair Manual

spare tire location rear view mirror high beam radio controls hood release adblue reset

Page 3793 of 4087

LEXUS SC400 1991 Service Repair Manual
SENSOR INSPECTION FOR AIR CONDITIONING SYSTEM ± AC005-04 December 16, 2004
Page 7 of 12
Graph 3:
TEMPERATURE 5F ( 5C)SPECIFICATION k W
14 (±10)8.00 to 10.00
23 (±5)6.15 to 7.65
32 (0)4.75 to 5.85

Page 3794 of 4087

$LEXUS SC400 1991 Service Repair Manual SENSOR INSPECTION FOR AIR CONDITIONING SYSTEM ± AC005-04 December 16, 2004 Page 8 of 12 5. Inspect Solar Sensor. Four types of solar sensors are used on Lexus vehicles depending on the \ vehicle spe$

Page 3795 of 4087

LEXUS SC400 1991 Service Repair Manual
SENSOR INSPECTION FOR AIR CONDITIONING SYSTEM ± AC005-04 December 16, 2004
Page 9 of 12
Procedure B:
a. Disconnect the solar sensor connector.
b. Measure the resistance between terminals 2 and 3 o

Page 3796 of 4087

LEXUS SC400 1991 Service Repair Manual
SENSOR INSPECTION FOR AIR CONDITIONING SYSTEM ± AC005-04 December 16, 2004
Page 10 of 12
Procedure C:
a. Turn the ignition switch ON.
b. Measure the voltage between terminals TSR (+) and CLTE (±)

Page 3797 of 4087

LEXUS SC400 1991 Service Repair Manual
SENSOR INSPECTION FOR AIR CONDITIONING SYSTEM ± AC005-04 December 16, 2004
Page 11 of 12
Procedure D:
a. Turn the ignition switch ON.
b. Using the tester, measure the voltage between terminals
TSD

Page 3798 of 4087

LEXUS SC400 1991 Service Repair Manual
SENSOR INSPECTION FOR AIR CONDITIONING SYSTEM ± AC005-04 December 16, 2004
Page 12 of 12
6. Inspect Room Humidity Sensor.
Measure the humidity and output
voltage of the humidity sensor when
the sens

Page 3799 of 4087

LEXUS SC400 1991 Service Repair Manual
DATE:NOVEMBER 29, 1996
TitleALTERNATE REFRIGERANTS AND A/C RETROFITPage 1 of 2
Effective January 1, 1996, the E.P.A. has officially banned the manufacture of Refrigerant 12 (Freon).
As a result, surp

DATE:NOVEMBER 29, 1996
TitleALTERNATE REFRIGERANTS AND A/C RETROFITPage 1 of 2
Effective January 1, 1996, the E.P.A. has officially banned the manufacture of Refrigerant 12 (Freon).
As a result, surplus supplies of R±12 will begin to dwindle over the ne\
xt several years until, eventually,
R±12 will no longer be available.
This uncertainty about the availability of R±12 has caused significant concerns for Lexus dealers when
servicing HVAC systems not using R±134a refrigerant. Similarly, the reduced availability of R±12 has
prompted demands for R±134a retrofit kits and/or alternate refrigerants. Thi\
s TSB will clarify Lexus's
current recommendations for servicing and retrofitting HVAC systems on Lexus vehicles using R±12
refrigerant.
ALTERNATE REFRIGERANTS:
Previously, the E.P.A. has endorsed other alternative refrigerants. These endorsements, combin\
ed with
the uncertain future availability of R±12, have lead to a limited accept\
ance of using alternative refrigerants
when servicing or retrofitting R±12 HVAC systems. Use of these refrigerants can lead to several service
related problems, including:
Poor system performance and leak detection capabilities.
Contamination of R±12 and R±134a during refrigerant recovery and r\
ecycling.
Recently the E.P.A. released a statement clarifying that approval of alternative refrige\
rants relates only
to the toxicology, flammability, ozone depletion and global warming characteristics. The approval does
not imply acceptability of alternative refrigerants use with respect to serviceability or performance.
TOYOTA MOTOR SALES, U.S.A. ENDORSES THE USE OF R±134a AS THE ONLY ACCEPTABLE ALTERNATIVE REFRIGERANT FOR VEHICLES USING R±12.
R±12 AVAILABILITY:
It is estimated that existing R±12 supplies will meet market demand i\
n 1996. Beyond that, Lexus will
supply R±12 to it's dealers from a strategic reserve. These strategic reserves are alloca\
ted specifically
for distribution to Lexus dealers for repair of their customers' R±12 H\
VAC systems. TMS projects these
reserves may meet dealer demand through early 1998. After that, we believe R±12 will no longer be re\
adi-
ly available and dealers will begin to retrofit customer vehicles with R\
±134a.
REF: HEATING & AIR CONDITIONING
NO:AC007±96
MODEL:ALL MODELS
WhereEverybodyKnowsYourName

Page 3800 of 4087

$LEXUS SC400 1991 Service Repair Manual ALTERNATE REFRIGERANTS AND A/C RETROFITPage 2 of 2 RETROFIT ISSUES: Lexus has completed development of retrofit parts for all later model Le\ xus vehicles using R±12 refrigerant. These parts will be$

Load next 8 pages

Page: < prev 1-10 ... 3761-3768 3769-3776 3777-3784 3785-3792 3793-3800 3801-3808 3809-3816 3817-3824 3825-3832 ... 4088 next >

display lumbar support dimensions oil capacities adblue reset air condition