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

Subaru Crosstrek Service Manual / Continuously variable transmission (diagnostics) / Diagnostic procedure with diagnostic trouble code (dtc) / Dtc u0100 lost communication with ecm/pcm a

CONTINUOUSLY VARIABLE TRANSMISSION (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)

DTC U0100 LOST COMMUNICATION WITH ECM/PCM “A”

NOTE:

Refer to “LAN SYSTEM (DIAGNOSTICS)” for diagnostic procedures. Basic Diagnostic Procedure">

1. OUTLINE OF DIAGNOSIS

• Detect malfunction of CAN communication.

• Judge as NG when CAN communication failure occurs with the ECM.

2. EXECUTION CONDITION

Secondary Parameters	Execution condition
12 V battery system voltage	≥ 10 V
Measured turbine shaft speed	> 0 rpm
or
Transmission range	Drive or Reverse

3. DIAGNOSTIC METHOD

If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.

Judgment Value

Malfunction Criteria	Threshold Value
CAN data from ECM	Lost

Time Needed for Diagnosis: 0.5 seconds

Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.

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Other materials:

Removal
LIGHTING SYSTEM > Room LightREMOVAL1. Disconnect the ground cable from battery. NOTE">2. Remove the light assembly - room.CAUTION:When using a flat tip screwdriver, apply protective tape or cloth and be careful not to cause damage.(1) Release the claws and remove the lens.(2) Remove the ...

Preparation
1. Turn off the ignition switch. 2. Close all doors (including rear gate). 3. Press and hold the " " button on the access key. All doors (including rear gate) will then be locked. 4. Keep the " " button pressed, and press the rear lock button within 5 seconds after step ...

Maintenance precautions
When maintenance and service are required, it is recommended that all work be done by an authorized SUBARU dealer. If you perform maintenance and service by yourself, you should familiarize yourself with the information provided in this section on general maintenance and service for your SU ...