CAN Communication System

CAN COMMUNICATION: CAN COMMUNICATION SYSTEM: U1119: Lost Communication with Object Recognition ECU (CAN)
U1119 - Lost Communication with Object Recognition ECU (CAN)

DESCRIPTION

HINT
For vehicles with lane keeping assist system only.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

(a) Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the main wire and the branch wire.

CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to prevent airbag and seat belt pretensioner activation.

NOTICE:
* w/ Navigation System (for HDD):
After the engine switch is turned off, the display and navigation module display (HDD navigation system) records various types of memory and settings. As a result, after turning the engine switch off, be sure to wait for the time specified in the following table before disconnecting the cable from the negative (-) battery terminal.

Waiting Time before Disconnecting Cable from Negative (-) Battery Terminal:

* When disconnecting the cable, some systems need to be initialized after the cable is reconnected Repair Instruction - Initialization.

NEXT -- Continue to next step.

2. CHECK FOR OPEN IN CAN BUS WIRE (OBJECT RECOGNITION ECU BRANCH WIRE)

(a) Disconnect the g1 object recognition ECU connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard resistance:

NG -- REPAIR OR REPLACE OBJECT RECOGNITION ECU BRANCH WIRE OR CONNECTOR (CA1P, CA1N)
OK -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (OBJECT RECOGNITION ECU - BATTERY AND BODY ECU)

(a) Disconnect the g1 object recognition ECU connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard resistance:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE OBJECT RECOGNITION ECU Removal