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.
  • Inspect the fuses and relays related to the system before inspecting the suspected areas below.
  • If the problem occurs in certain locations or times of day, the possibility of wave interference is high.
  • If a malfunction occurred after optional components were installed, check if the components are causing wave interference.
Smart Access System with Push-button Start (for Start Function)

Symptom

Suspected Area

Link

Power source mode does not change to on (IG) or on (ACC)

Refer to "Power Source Mode does not Change to ON (IG and ACC)"

Power source mode does not change to on (IG)

Refer to "Power Source Mode does not Change to ON (IG)"

Power source mode does not change to on (ACC)

Refer to "Power Source Mode does not Change to ON (ACC)"

Power source mode does not change to on (READY)

Refer to "Power Source Mode does not Change to ON (READY)"

Hybrid control system cannot be started by remote engine start and stop (Both the wireless door lock control system and push-button start function operate normally)*

Refer to "Remote Engine Starter does not Operate"

  • *: w/ Lexus Enform Remote

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 Terminals Of Ecu

TERMINALS OF ECU CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (a) Disconnect the I51 and I53 certification ECU (smart key ECU assembly) connectors. (b) Measure the voltage and resistance accordin

 Diagnosis System

DIAGNOSIS SYSTEM DESCRIPTION (a) Smart access system with push-button start (for Start Function) data and Diagnostic Trouble Codes (DTCs) can be read through the Data Link Connector 3 (DLC3) of the ve

 Dtc Check / Clear

DTC CHECK / CLEAR NOTICE: When using the Techstream with the power switch off, connect the Techstream to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until

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 Components

COMPONENTS ILLUSTRATION *A for 8 Inch Display *B for 10.3 Inch Display *1 AIR CONDITIONING CONTROL ASSEMBLY *2 CENTER INSTRUMENT CLUSTER FINISH PANEL ASSEMBLY *3 CONSOLE ARMREST ASSEMBLY *4 INSTRUMENT PANEL FINISH PLATE *5 INSTRUMENT SIDE PANEL LH *6 INSTRUMEN

 Removal

REMOVAL CAUTION / NOTICE / HINT NOTICE: When the brake pedal is first depressed after replacing the brake pads or pushing back the disc brake piston, DTC C1214 may be output. As there is no malfunction, clear the DTC. While the auxiliary battery is connected, even if the power switch is off, th

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