Lexus NX: Lost Communication with Cruise Control Module (U0104,U0122,U0293)

Lexus NX Service Manual / Engine & Hybrid System / Cruise Control / Dynamic Radar Cruise Control System / Lost Communication with Cruise Control Module (U0104,U0122,U0293)

DESCRIPTION

The hybrid vehicle control ECU communicates with each sensor and ECU via CAN communication.

If any malfunction is detected in a CAN communication circuit, one or more CAN communication system DTCs are stored.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

U0104

Lost Communication with Cruise Control Module

When the power switch is on (IG) and the dynamic radar cruise control system is operating, a communication malfunction between the millimeter wave radar sensor assembly and hybrid vehicle control ECU is detected for approximately 1 second or more.

CAN communication system

Radar Cruise1

U0122

Lost Communication with Vehicle Dynamics Control Module

When the power switch is on (IG) and the dynamic radar cruise control system is operating, a communication malfunction between the skid control ECU (brake booster with master cylinder assembly) and hybrid vehicle control ECU is detected for approximately 2.6 seconds or more.

CAN communication system

Radar Cruise1

U0293

Lost Communication with Hybrid Vehicle Control System

When the dynamic radar cruise control system is operating, a communication malfunction between the skid control ECU (brake booster with master cylinder assembly) and hybrid vehicle control ECU is detected for approximately 1 second or more.

CAN communication system

Radar Cruise1

PROCEDURE

1.

CHECK FOR DTCs (Radar Cruise1)

(a) Clear the DTCs.

Click here

Powertrain > Radar Cruise1 > Clear DTCs

(b) Make sure that the DTC detection conditions are met.

HINT:

If the detection conditions are not met, the system cannot detect the malfunction.

(c) Check for DTCs.

Click here

Powertrain > Radar Cruise1 > Trouble Codes

Result

Proceed to

DTC U0100, U0104 and U0122 are not output

A

DTC U0100, U0104 or U0122 is output

B

A

USE SIMULATION METHOD TO CHECK

B

GO TO CAN COMMUNICATION SYSTEM

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 Precaution

PRECAUTION PRECAUTIONS FOR BLIND SPOT MONITOR SYSTEM (a) The blind spot monitor function may not detect vehicles correctly in the following conditions: (1) When the sensor is misaligned due to a strong impact to the sensor or its surrounding area. (2) When mud, snow, ice, a sticker, etc. is covering

 Removal

REMOVAL CAUTION / NOTICE / HINT HINT: Use the same procedure for the RH and LH sides. The procedure listed below is for the LH side. PROCEDURE 1. REMOVE NO. 3 DECK BOARD SUB-ASSEMBLY Click here 2. REMOVE REAR DECK FLOOR BOX Click here 3. REMOVE DECK FLOOR BOX LH Click here 4. PRECAUTIO

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