Lexus NX: Immobiliser System
- Precaution
- Parts Location
- System Diagram
- System Description
- How To Proceed With Troubleshooting
- Registration
- Problem Symptoms Table
- Terminals Of Ecu
- Diagnosis System
- Dtc Check / Clear
- Data List / Active Test
- Diagnostic Trouble Code Chart
- Engine Starter Communication Malfunction (B2779)
- Antenna Coil Open / Short (B2784)
- Short to GND in Immobiliser System Power Source Circuit (B278A)
- ID BOX EEPROM Malfunction (B2790)
- Engine Immobiliser System Malfunction (B2799-790)
- Engine Immobiliser System Communication Line High Fixation (B279A-186)
- Engine Immobiliser System Presence Detection (B279C-185)
- Security Indicator Light Does not Blink
- Immobiliser System does not Operate Properly
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Precaution
PRECAUTION PRECAUTION FOR DISCONNECTING CABLE FROM NEGATIVE AUXILIARY BATTERY TERMINAL NOTICE:
After the power switch is turned off, there may be a waiting time before disconnecting the negative (-
Parts Location
PARTS LOCATION ILLUSTRATION *1 NO. 1 ENGINE ROOM RELAY BLOCK AND NO. 1 JUNCTION BLOCK ASSEMBLY - AM2 FUSE - STRG LOCK FUSE *2 NO. 2 ENGINE ROOM RELAY BLOCK AND NO. 2 JUNCTION BLOCK ASSEMBLY
System Diagram
SYSTEM DIAGRAM
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Removal
REMOVAL CAUTION / NOTICE / HINT CAUTION: Wear protective gloves. Sharp areas on the parts may injure your hands. PROCEDURE 1. REMOVE REAR SEAT ASSEMBLY Click here 2. REMOVE REAR SEATBACK COVER Click here 3. REMOVE REAR SEAT INNER WITH CENTER BELT ASSY RH (for RH Side) Click here 4. REMOVE REAR
Terminals Of Ecu
TERMINALS OF ECU CHECK MULTIPLEX NETWORK DOOR ECU (a) Disconnect the Y26 and Y27 multiplex network door ECU connectors. (b) Measure the voltage and resistance according to the value(s) in the table below. HINT: Measure the values on the wire harness side with the connector disconnected. Terminal
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