Pre-Collision System

PRE-COLLISION: PRE-COLLISION SYSTEM:

DTC U1101 - Lost Communication with Distance Control ECU

DESCRIPTION

The seat belt control ECU receives signals from the skid control ECU and gateway ECU and center airbag sensor assembly and distance control ECU via CAN communication system.
The distance control ECU receives signals from the ECM via CAN communication system.





HINT: When two or more DTCs starting with "U" are output simultaneously, inspect the connectors and wire harness of each ECU.

INSPECTION PROCEDURE

PROCEDURE

1. CHECK OPEN IN CAN BUS WIRE (DISTANCE CONTROL ECU BRANCH LINE)
(a) Turn the engine switch off.
(b) Disconnect the distance control ECU connector (J17).





(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- REPAIR OR REPLACE DISTANCE CONTROL ECU BRANCH WIRE OR CONNECTOR (CAN-H, CAN-L)
OK -- Continue to next step.
2. CHECK WIRE HARNESS (+B, GND)





(a) Measure the resistance according to the value(s) in the table below.
Standard resistance:





(b) Measure the voltage according to the value(s) in the table below.
Standard voltage:






OK -- REPLACE DISTANCE CONTROL ECU
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR