Lexus NX: Seat Heater System

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 Precaution

PRECAUTION FOR OPERATION OF ELECTRICAL ITEMS RESTRICTED NOTICE: If the auxiliary battery voltage is low, the seat heater system may not operate. When "High Power Consumption / Partial Limit On AC/H

 Parts Location

PARTS LOCATION ILLUSTRATION *A w/ Rear Seat Heater - - *1 AIR CONDITIONING CONTROL ASSEMBLY *2 SEAT HEATER SWITCH (for Driver Side) *3 SEAT HEATER SWITCH (for Front Passenger

 System Diagram

SYSTEM DIAGRAM for Front: for Rear (w/ Rear Seat Heater):

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 How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT HINT: *: Use the Techstream. PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP NEXT 2. INSPECT AUXILIARY BATTERY VOLTAGE Standard voltage: 11 to 14 V If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding. NE

 Extension Module Malfunction 2 (B1556)

DESCRIPTION These DTCs are stored when a malfunction occurs in the Navigation ECU. DTC No. Detection Item DTC Detection Condition Trouble Area B1556 Extension Module Malfunction 2 When any of the following conditions is met: Internal hard drive malfunction EEPROM error Storag

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