Subaru Crosstrek Service Manual: Dtc u0140 lost communication with body control module
CONTINUOUSLY VARIABLE TRANSMISSION (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC U0140 LOST COMMUNICATION WITH BODY CONTROL MODULE
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 body integrated unit.
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.
Malfunction Criteria | Threshold Value |
CAN data from BIU | Lost |
Time Needed for Diagnosis: 2 seconds
Malfunction Indicator Light Illumination: Does not illuminate.
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Other materials:
Corrosion protection
Your Subaru Ascent has been carefully engineered and manufactured with advanced
corrosion-resistant materials and protective coatings. These features are designed
to preserve the vehicle’s structural integrity, maintain its refined appearance,
and ensure long-term reliability even under chal ...
Models without multi function display
NOTE
For models with information display
(black and white), refer to "Information
display"
The U.S.-spec models are not equipped
with the multi function display. The other
models may be equipped with the multi
function display or not, depending on the
model.
Safety precautions
WARNING
Alw ...
System block diagram
Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS) > Control Module I/O SignalSYSTEM BLOCK DIAGRAM• Blind Spot Detection/Rear Cross Traffic Alert system consists of the following.• There is a control ECM in the radar sensor main body, which performs the vehicle identification ...
