Lexus NX: Problem Symptoms Table

PROBLEM SYMPTOMS TABLE

NOTICE:

When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.

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 and relays related to this system before inspecting the suspected areas below.
  • The pre-collision system uses the CAN communication system. First, confirm that there are no malfunctions in the CAN communication system. Refer to How to Proceed with Troubleshooting.
Pre-Collision System

Symptom

Suspected Area

Link

"VSC Turned Off Pre-Collision Brake System Unavailable" is displayed

Check whether VSC is off

-

Electronically controlled brake system

Pre-collision system cannot be canceled (PCS warning light does not illuminate)

Combination meter assembly (check if indicator illuminates using Active Test)

Meter/gauge system

Steering pad switch assembly

Combination meter assembly

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 Terminals Of Ecu

TERMINALS OF ECU CHECK FORWARD RECOGNITION CAMERA NOTICE: DTCs may be output when connectors are disconnected during inspection. Therefore, be sure to clear the DTCs using the Techstream once the i

 Diagnosis System

DIAGNOSIS SYSTEM FUNCTION OF WARNING INDICATOR AND MESSAGE (a) If the pre-collision system is not functioning properly, the driver is warned by the PCS warning light and a warning message displayed on

 Dtc Check / Clear

DTC CHECK / CLEAR CHECK DTC (a) Connect the Techstream to the DLC3. (b) Turn the power switch on (IG). (c) Turn the Techstream on. (d) Enter the following menus: Body Electrical / Pre-Collision System

SEE MORE:

 Removal

REMOVAL PROCEDURE 1. REMOVE AIR CONDITIONING RADIATOR ASSEMBLY Click here 2. REMOVE QUICK HEATER ASSEMBLY Click here 3. REMOVE COOLER EXPANSION VALVE Click here 4. REMOVE NO. 1 COOLER EVAPORATOR SUB-ASSEMBLY Click here 5. REMOVE NO. 1 COOLER THERMISTOR (a) Remove the No. 1 cooler ther

 Removal

REMOVAL CAUTION / NOTICE / HINT CAUTION: Wear protective gloves. Sharp areas on the parts may injure your hands. If the side airbag was deployed, replace the front seat airbag assembly LH, separate type front seatback spring assembly, seatback felt, separate type front seatback cover and separa

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