Lexus NX: Diagnosis System
DIAGNOSIS SYSTEM
DESCRIPTION
NOTICE:
- When using the Techstream with the power switch off to confirm DTCs or Data List information related to the smart access system with push button start, the Techstream may not operate unless either of the following is performed: 1) Turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and vehicle begins, or 2) connect the Techstream to the vehicle and select the vehicle type under manual mode and enter the following menus: Body Electrical / Smart Access.
- Do not remove any fuses or disconnect the cable from the negative (-) auxiliary battery terminal before confirming and recording DTCs as the data stored in the ECUs will be cleared.
- DTCs may have been stored due to problems unrelated to the steering lock system. Be sure to confirm and record any DTCs output for other systems.
(a) The steering lock ECU (steering lock actuator assembly) stores DTCs when a malfunction occurs in the system. These DTCs can be confirmed by using the Techstream.
(b) The steering lock ECU (steering lock actuator assembly) is not connected to the CAN communication system. Therefore, communication with the Techstream is performed via the certification ECU (smart key ECU assembly).
(c) The steering lock ECU (steering lock actuator assembly) only stores DTCs for currently existing malfunctions. History DTCs are not stored.
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Dtc Check / Clear
DTC CHECK / CLEAR NOTICE:
The steering lock ECU (steering lock actuator assembly) does not store history DTCs. If any DTCs are output, confirm and record them as soon as possible. Do not turn the p
Data List / Active Test
DATA LIST / ACTIVE TEST READ 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 part
Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART Steering Lock System DTC No. Detection Item Link B2781 Open / Short in Steering Lock ECU B2782 Power Source Control ECU Malfunction B2788
SEE MORE:
Basic Inspection
CAUTION / NOTICE / HINT When a malfunction is not confirmed by the DTC check, troubleshooting should be carried out for all circuits considered to be possible causes of the problem. In many cases, by carrying out the basic engine check shown in the following procedure, the location of the problem ca
Lost Communication with Image Processing Module "A" (U023A87)
DESCRIPTION The forward recognition camera is connected to the skid control ECU (brake booster with master cylinder assembly) via the CAN communication line. When the skid control ECU (brake booster with master cylinder assembly) receives a forward recognition camera communication malfunction signal
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