RX 300 FWD V6-3.0L (1MZ-FE) (1999)
Seat Heater: Technical Service Bulletins
Seat Heater - Inspecting Independently Operated Systems
HEATING & AIR CONDITIONING
AC003-99
April 9, 1999
Title:
SEAT HEATER SYSTEM INSPECTION
Models:
'99 RX 300
Introduction
RX 300's now have Seat Heaters that work independently from one another. As a result of this change, a new Seat Heater Inspection Method has been
developed. Vehicles produced without independently operated Seat Heaters should still refer to the inspection procedures published in the RX 300
Repair Manual listed below.
PUBLICATION NUMBER
PUBLICATION NAME
RM626U2
'99 Lexus RX 300 Repair Manual
Affected Vehicles
^
1999 RX 300's equipped with Seat Heaters starting with the following VINs:
2WD JT6GF10U*X0019436
4WD JT6HF10U*X0040056
Additional Diagnostic Procedure
SEAT HEATER SWITCH INSPECTION
NOTE: The Inspection Method is the same for both Driver's and Passenger's Seat.
1.
inspect Seat Heater Switch Continuity:
SWITCH POSITION
TESTER CONNECTION
SPECIFIED CONDITION
ON
2-6
Continuity
3-6
OFF
3-6
No Continuity
Illumination Circuit
1-4
Continuity
If continuity is not as specified, replace the switch.
2.
inspect Seat Heater Switch Indicator Light Operation: