Lexus NX: Diagnosis System
Lexus NX Service Manual / Vehicle Interior / Theft Deterrent / Keyless Entry / Theft Deterrent System / Diagnosis System
DIAGNOSIS SYSTEM
CHECK DLC3
(a) Check the DLC3.
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INSPECT AUXILIARY BATTERY VOLTAGE
(a) Measure the auxiliary battery voltage with the power switch off.
Standard voltage:
11 to 14 V
If the voltage is below 11 V, recharge or replace the auxiliary battery.
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Engine Hood Courtesy Switch Circuit
DESCRIPTION The engine hood courtesy switch is installed together with the hood lock. This switch turns on when the engine hood is closed and turns off when the engine hood is opened. WIRING DIAGRAM
Horn Circuit
DESCRIPTION When the theft deterrent system is switched from the armed state to the alarm sounding state, the main body ECU (multiplex network body ECU) transmits a signal to cause the horn to sound a
Security Horn Circuit
DESCRIPTION When the theft deterrent system is switched from the armed state to the alarm sounding state, the main body ECU (multiplex network body ECU) transmits a signal to cause the security horn t
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Removal
REMOVAL PROCEDURE 1. DRAIN ENGINE COOLANT Click here 2. REMOVE NO. 1 ENGINE COVER SUB-ASSEMBLY Click here 3. REMOVE ENGINE COOLANT TEMPERATURE SENSOR (a) Disconnect the engine coolant temperature sensor connector. (b) Remove the 2 bolts and disconnect the 2 ground wires. (c)
Airbag ECU Malfunction (B1000)
DESCRIPTION The airbag ECU assembly consists of a deceleration sensor, safing sensor, drive circuit, diagnosis circuit, ignition control, etc. If the airbag ECU assembly receives signals from the deceleration sensor, it determines whether or not the SRS should be activated. DTC B1000 is stored when
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