Lexus NX: Problem Symptoms Table

PROBLEM SYMPTOMS TABLE

HINT:

Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.

Cooling Fan System

Symptom

Suspected Area

Link

Cooling fans do not operate

CAN communication system

Engine coolant temperature sensor

Cooling fan circuit

Cooling fan motor

No. 2 cooling fan motor

FAN NO.1 relay

Cooling fan ECU

ECM

Cooling fans do not stop (continue to operate)

CAN communication system

Engine coolant temperature sensor

Cooling fan circuit

Cooling fan ECU

ECM

Cooling fan speed does not change

CAN communication system

Cooling fan circuit

Cooling fan ECU

ECM

READ NEXT:

 On-vehicle Inspection

ON-VEHICLE INSPECTION PROCEDURE 1. INSPECT COOLING FAN SYSTEM (a) Connect the Techstream to the DLC3. (b) Turn the power switch on (IG). (c) Turn the Techstream on. (d) Enter the following menus: Powe

 Cooling Fan Circuit

DESCRIPTION The ECM calculates an appropriate cooling fan speed based on the engine coolant temperature, air conditioning switch condition, refrigerant pressure, hybrid coolant temperature, engine spe

 Cooling System

On-vehicle InspectionON-VEHICLE INSPECTION PROCEDURE 1. INSPECT FOR COOLANT LEAK CAUTION: To avoid the danger of being burned, do not remove the radiator reservoir cap while the engine assembly and r

SEE MORE:

 Front Fog Light Circuit

DESCRIPTION Illumination of the front fog lights is controlled by the main body ECU (multiplex network body ECU). WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: Inspect the fuses for circuits related to this system before performing the following inspection procedure. Before performing trouble

 All Doors LOCK/UNLOCK Functions do not Operate Via Door Control Switch

DESCRIPTION The main body ECU (multiplex network body ECU) receives switch signals from the door control switch assembly on the front passenger door and activates the door lock motor on each door according to these signals. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: When using the Techstream

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