Lexus ES manuals

Lexus ES: 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.
  • Inspect the fuses related to this system before inspecting the suspected areas below.

Symptom

Suspected Area

Link

Cooling fan does not operate

Engine coolant temperature sensor

EFI-MAIN NO. 1 relay

Cooling fan circuit

Fan with motor assembly

-

ECM

Cooling fan does not stop (continues to operates)

Engine coolant temperature sensor

Cooling fan circuit

Fan with motor assembly

-

ECM

Cooling fan speed does not change

Cooling fan circuit

Fan with motor assembly

-

ECM

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 On-vehicle Inspection

ON-VEHICLE INSPECTION PROCEDURE 1. INSPECT COOLING FAN SYSTEM CAUTION: To prevent injury due to contact with an operating cooling fan, keep your hands and clothing away from the cooling fan when inspe

 Cooling Fan Circuit

DESCRIPTION The ECM calculates an appropriate cooling fan speed based on the engine coolant temperature, air conditioning switch status, refrigerant pressure, engine speed and vehicle speed, and sends

 Cooling System

On-vehicle InspectionON-VEHICLE INSPECTION CAUTION / NOTICE / HINT CAUTION: Do not remove the radiator cap sub-assembly while the engine and radiator assembly are still hot. Pressurized, hot engine c

SEE MORE:

 Refueling

Opening the fuel tank cap The fuel tank of your vehicle has a special structure, which requires a reduction in fuel tank pressure before refueling. After the opener switch has been pressed, it will take several seconds until the vehicle is ready for refueling. Before refueling the vehicle

 Generator Position Sensor Circuit Voltage Below Threshold (P0A4B16,P0A4B1F)

DTC SUMMARY MALFUNCTION DESCRIPTION These DTCs indicate that the resolver output signal is abnormal. The cause of this malfunction may be one of the following: Area Main Malfunction Description Inverter low-voltage circuit The connectors are not connected properly Hybrid Vehicle Trans

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