Subaru Crosstrek Service Manual: Dtc u0100 lost communication with ecm/pcm a

Detected when CAN data from the engine control module (ECM) does not arrive.

NOTE:

Perform the diagnosis for LAN system. Basic Diagnostic Procedure > PROCEDURE">

Diagnostic procedure with diagnostic trouble code (dtc)

Dtc u1120 lost communication with autostart stop control module

Other materials:

Caution
CONTINUOUSLY VARIABLE TRANSMISSION (DIAGNOSTICS) > General DescriptionCAUTION1. The airbag system wiring harness is routed near the TCM.CAUTION:• All the airbag system wiring harnesses and connectors are colored yellow. Do not use an electric test equipment to check these circuits.• B ...

Caution
ENGINE (DIAGNOSTICS)(H4DO) > General DescriptionCAUTION1. Airbag system wiring harness is routed near the ECM, main relay and fuel pump relay.CAUTION:• Do not use electrical test equipment on the airbag system circuits.• Be careful not to damage the airbag system wiring harness when s ...

Towing
If towing is necessary, it is best done by your SUBARU dealer or a commercial towing service. Observe the following procedures for safety. WARNING Never tow AWD models with the front wheels raised off the ground while the rear wheels are on the ground, or with the rear wheels raised off t ...