Pre-Collision System

PRE-COLLISION: PRE-COLLISION SYSTEM: U0100: Lost Communication with ECM / PCM "A"

DTC U0100 - Lost Communication with ECM / PCM "A"

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 WIRE HARNESS (+B1, +B, E)
(a) Turn the engine switch off.
(b) Disconnect the ECM connectors (E4) and (A5).





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





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






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE ECM