Lexus NX: Diagnostic Trouble Code Chart

DIAGNOSTIC TROUBLE CODE CHART

Immobiliser System

DTC No.

Detection Item

Link

B2779

Engine Starter Communication Malfunction

B2784

Antenna Coil Open / Short

B278A

Short to GND in Immobiliser System Power Source Circuit

B2790

ID BOX EEPROM Malfunction

B2799-790

Engine Immobiliser System Malfunction

B279A-186

Engine Immobiliser System Communication Line High Fixation

B279C-185

Engine Immobiliser System Presence Detection

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 Engine Starter Communication Malfunction (B2779)

DESCRIPTION If the remote engine start ECU does not respond to the certification ECU (smart key ECU assembly) or the remote engine start ID is not registered*, this DTC is stored. If communication bet

 Antenna Coil Open / Short (B2784)

DESCRIPTION When an open or short circuit is detected in the transponder key amplifier coil built into the power switch, the certification ECU (smart key ECU assembly) stores this DTC. This DTC is als

 Short to GND in Immobiliser System Power Source Circuit (B278A)

DESCRIPTION When there is a short to GND in the power supply for the transponder key amplifier of the power switch, the certification ECU (smart key ECU assembly) stores this DTC. DTC No. Detecti

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 Generator Temperature Sensor Circuit Low (P0A38-257,P0A39-259)

DESCRIPTION Refer to the description for DTC P0A37-260. Click here DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate P0A38-257 Generator Temperature Sensor Circuit Low Short to ground in the generator temperature sensor circuit (1 trip detection

 Removal

REMOVAL CAUTION / NOTICE / HINT HINT: Use the same procedure for the RH and LH sides. The procedure described below is for the LH side. PROCEDURE 1. REMOVE CENTER BACK DOOR GARNISH Click here 2. REMOVE BACK DOOR SIDE GARNISH LH Click here 3. REMOVE BACK DOOR SIDE GARNISH RH Click here

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