Lexus NX: Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
HINT:
- Inspect the fuses and relays related to this system before inspecting the suspected areas below.
- If the problem only occurs in certain locations or at certain times of day, check for wave interference.
- If optional components are installed, check for wave interference from the components.
| Symptom | Suspected Area | Link |
|---|---|---|
| Security indicator light does not blink | Proceed to "Security Indicator Light Does not Blink" | |
| Immobiliser system does not operate properly | Proceed to "Immobiliser System does not Operate Properly" | |
| Hybrid control system cannot be started*1 | Certification ECU (Smart key ECU assembly) | |
| Hybrid vehicle control ECU | | |
| Hybrid control system | | |
| Power source mode cannot be changed*1 | Power switch | |
| Certification ECU (Smart key ECU assembly) | | |
| Steering lock lock/unlock not possible*2 | Steering lock ECU (Steering lock actuator assembly) | |
| Hybrid control system cannot be started by Lexus Enform Remote (Hybrid control system can be started by push-button start function)*3 | Proceed to "Remote Engine Starter does not Operate" | |
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- *1: Refer to Problem Symptoms Table for Smart Access System with Push-button Start (for Start Function).
- *2: Refer to Problem Symptoms Table for Steering Lock System.
- *3: w/ Lexus Enform Remote
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Terminals Of Ecu
TERMINALS OF ECU CHECK POWER SWITCH (a) Measure the voltage and resistance according to the value(s) in the table below. Terminal No. (Symbol) Input/Output Wiring Color Terminal Description
Diagnosis System
DIAGNOSIS SYSTEM DESCRIPTION (a) The certification ECU (smart key ECU assembly) and hybrid vehicle control ECU control the vehicle immobiliser system functions. Immobiliser system data and Diagnostic
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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Open Circuit in Main Relay 1 (C1311,C1312)
DESCRIPTION The ABS main relay supplies power to the changeover solenoid and the linear solenoid. The ABS main relay remains on for approximately 2 minutes after the power switch is turned off and the input of brake pedal operation signals stops, and supplies power to the system to keep it ready to
Terminals Of Ecu
TERMINALS OF ECU CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY, MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) *1 Main Body ECU (Multiplex Network Body ECU) - - (a) Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly. Click here (b) Co
