Lexus NX: System Diagram
SYSTEM DIAGRAM
for Front:
for Rear (w/ Rear Seat Heater):
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System Description
SYSTEM DESCRIPTION FRONT SEAT HEATER (a) By operating the seat heater switch on the air conditioning control assembly, the temperature can be controlled within the range of 32 to 43°C (89 to 109°F).
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT:
Use the following procedure to troubleshoot the seat heater system.
*: Use the Techstream.
PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP
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Operation Check
OPERATION CHECK CHECK SEAT HEATER (for Front) (a) Turn the power switch on (IG). (b) Check that the indicator illuminates and the surface of the front seat warms up, when the seat heater switch on the
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Short in Passenger Side Front Seat Cushion Squib Circuit (B1875-B1878)
DESCRIPTION The front seat cushion squib RH circuit consists of the airbag ECU assembly and the front seat cushion airbag assembly RH. The circuit instructs the SRS to deploy when deployment conditions are met. These DTCs are recorded when a malfunction is detected in the front seat cushion squib RH
Fail-safe Chart
FAIL-SAFE CHART MALFUNCTION DETECTION (a) Operation when malfunction is detected Content Operation Heater failure Overcurrent detection of drive element Heater output off Overheating detection of drive element Heater output off Power failure Low-voltage detection Heater ou
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