Lexus NX: Diagnosis System



(a) The DCM (telematics transceiver) control the vehicle safety connect system functions. Safety connect system data and Diagnostic Trouble Codes (DTCs) can be read through the vehicle Data Link Connector 3 (DLC3). In some cases, a malfunction may be occurring in the safety connect system. When the system seems to be malfunctioning, use the Techstream to check for malfunctions and perform repairs.


(a) Check the DLC3.

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(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.


(a) When a malfunction is detected in the safety connect system, the manual (SOS) switch red indicator on the manual (SOS) switch illuminates to inform the driver of the malfunction.

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 Dtc Check / Clear

DTC CHECK / CLEAR CHECK DTC (a) Connect the Techstream to the DLC3. (b) Turn the power switch on (IG). (c) Turn the Techstream on. (d) Enter the following menus: Body Electrical / Telematics / Trouble

 Data List / Active Test

DATA LIST / ACTIVE TEST DATA LIST NOTICE: In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a pa

 Diagnostic Trouble Code Chart

DIAGNOSTIC TROUBLE CODE CHART Safety Connect System DTC No. Detection Item Link B153711 Telephone Sub Antenna Circuit Short to Ground B153713 Telephone Sub Antenna Circuit Open


 Switch Lights of Remote Touch Always Illuminate or cannot be Controlled Using Rheostat

DESCRIPTION Power is supplied to the remote touch illumination when the light control switch is in the tail or head position. HINT: When the remote touch is in self check mode, the switch illumination on the remote touch may remain on. If any illumination controlled by the rheostat switch has a

 Telephone Main Antenna Circuit Short to Ground (B15CB11,B15CB13)

DESCRIPTION This DTC is stored when the DCM (telematics transceiver) detects an open or a short in the telephone and GPS antenna (roof antenna assembly) circuit. DTC No. Detection Item DTC Detection Condition Trouble Area B15CB11 Telephone Main Antenna Circuit Short to Ground Teleph

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