Subaru Crosstrek Service Manual: Dtc u0101 lost communication with tcm

Subaru Crosstrek Service Manual / Engine (diagnostics)(h4do) / Diagnostic procedure with diagnostic trouble code (dtc) / 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.

Judgment Value

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.

Dtc p1531 battery current sensor circuit high

ENGINE (DIAGNOSTICS)(H4DO) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)DTC P1531 BATTERY CURRENT SENSOR CIRCUIT HIGHDTC detecting condition:Immediately at fault recognitionCAUTION:Afte ...

Dtc p0125 insufficient coolant temperature for closed loop fuel control

ENGINE (DIAGNOSTICS)(H4DO) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)DTC P0125 INSUFFICIENT COOLANT TEMPERATURE FOR CLOSED LOOP FUEL CONTROLDTC detecting condition:Detected when two ...

Other materials:

Removal
FUEL INJECTION (FUEL SYSTEMS)(H4DO) > Engine Coolant Temperature SensorREMOVAL1. Disconnect the ground cable from battery.2. Drain engine coolant. Engine Coolant > REPLACEMENT">3. Disconnect the connector (A) from the engine coolant temperature sensor, and remove the engine coolant te ...

Dtc p2750 intermediate shaft speed sensor "c" circuit range/performance
CONTINUOUSLY VARIABLE TRANSMISSION (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)DTC P2750 INTERMEDIATE SHAFT SPEED SENSOR "C" CIRCUIT RANGE/PERFORMANCEDTC detecting condition:Immediately at fault recognitionTrouble symptom:• Shifting shock is felt.• ...

Oil pressure warning light
If this light illuminates when the engine is running, it may indicate that the engine oil pressure is low and the lubricating system is not working properly. If the light illuminates while driving or does not turn off after the engine starts, stop the engine at the first safe opportunity ...