Lexus NX: Heater Water Pump

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 Components

COMPONENTS ILLUSTRATION *1 AIR CLEANER CAP SUB-ASSEMBLY *2 AIR CLEANER CASE SUB-ASSEMBLY *3 AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY *4 HEATER ACCESSORY ASSEMBLY *5 HEATER WAT

 Removal

REMOVAL PROCEDURE 1. DRAIN ENGINE COOLANT (for Inverter Coolant) Click here 2. REMOVE AIR CLEANER CAP SUB-ASSEMBLY Click here 3. REMOVE AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY Click here 4.

 Inspection

INSPECTION PROCEDURE 1. INSPECT HEATER ACCESSORY ASSEMBLY *a Component without harness connected (Heater Accessory Assembly (Heater Water Pump)) (a) Check the motor operation. (1) Apply the p

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 Check Bus 3 Line for Short to +B

DESCRIPTION There may be a short circuit between one of the CAN bus lines and +B when there is no resistance between terminal 6 (CA3H) of the central gateway ECU (network gateway ECU) and terminal 16 (BAT) of the DLC3, or terminal 21 (CA3L) of the central gateway ECU (network gateway ECU) and termin

 Power Steering Warning Light Circuit

DESCRIPTION The power steering ECU is connected to the combination meter via CAN communication. If any of the following conditions are detected, the power steering warning light remains on. The circuit that supplies power source voltage to the power steering ECU assembly (terminal IG) is open.

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