Subaru Crosstrek Service Manual: Dtc u0101 lost communication with tcm
ENGINE (DIAGNOSTICS)(H4DO) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC U0101 LOST COMMUNICATION WITH TCM
NOTE:
For the diagnostic procedure, refer to LAN section. Basic Diagnostic Procedure">
1. OUTLINE OF DIAGNOSIS
Detect malfunction of CAN communication.
Judge as NG when CAN communication failure between TCM, VDC CM and combination meter has occurred.
2. COMPONENT DESCRIPTION
(Common Specifications)
CAN Protocol 2.0 B (Active)
Frame Format: 11 Bit ID Frame (Standard Frame)
Conforms to ISO11898
Communication Speed: 500 kbps
3. EXECUTION CONDITION
Secondary Parameters | Execution condition |
Battery voltage | ≥ 10.9 V |
4. GENERAL DRIVING CYCLE
Perform the diagnosis continuously after starting the engine.
5. DIAGNOSTIC METHOD
Judge as NG when the following conditions are established.
Malfunction Criteria | Threshold Value |
CAN data from TCM | = Lost |
Time Needed for Diagnosis: 500 ms
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
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Other materials:
OFF delay timer
The following lights have an automatic
illumination function.
dome light
map light (type A)
cargo area light
After being illuminated automatically,
these lights remain on for several seconds
and then gradually turn off under the
following conditions
after all doors are closed (type A ...
System servicing
WARNING
When discarding a seatbelt retractor
assembly or scrapping
the entire vehicle damaged by a
collision, consult your SUBARU
dealer.
Tampering with or disconnecting
the system's wiring could result
in accidental activation of the
seatbelt pretensioner and/or
SRS airbag or ...
Removal
STARTING/CHARGING SYSTEMS(H4DO) > StarterREMOVAL1. Disconnect the ground cable from battery. NOTE">2. Remove the clip (A) from the air intake boot.3. Loosen the clamp (B) securing the air cleaner case (rear) to the air intake boot.4. Loosen the clamp (C) which secures the throttle body t ...
