lexus Workshop Repair Guides

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Seat Heater - Replacement Procedure|Page 9097 > < Seat Heater - Replacement Procedure|Page 9095
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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:

Seat Heater - Replacement Procedure|Page 9097 > < Seat Heater - Replacement Procedure|Page 9095