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 | |
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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
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Data List / Active Test
DATA LIST / ACTIVE TEST DATA LIST HINT: Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be dis
Diagnosis System
DIAGNOSIS SYSTEM DESCRIPTION (a) Diagnostic Trouble Codes (DTCs) for the LEXUS ENFORM system can be read from the Data Link Connector 3 (DLC3) of the vehicle. When the system seems to be malfunctioning, use the Techstream to check for malfunctions and to repair it. CHECK DLC3 (a) Check the DLC3. Cli
