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Subaru Legacy Service Manual: Dtc u1712 lost lin communication with battery "1" monitor module

Subaru Legacy Service Manual / Engine (diagnostics)(h6do) / Diagnostic procedure with diagnostic trouble code (dtc) / Dtc u1712 lost lin communication with battery "1" monitor module

NOTE:

For the diagnostic procedure, refer to DTC U0077. Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC U0073 CONTROL MODULE COMMUNICATION BUS OFF

1. OUTLINE OF DIAGNOSIS

Detect malfunction of LIN communication.

Judge as NG when LIN communication failure has occurred with the battery sensor.

2. COMPONENT DESCRIPTION

(Common Specifications)

Communication protocol: LIN 2.0

Communication Speed: 19.20 kbps

3. EXECUTION CONDITION

Secondary Parameters

Execution condition

Battery voltage

≥ 10.9 V

4. GENERAL DRIVING CYCLE

Always perform the diagnosis continuously.

5. 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

Data received from control modules connected to LIN

No change

or

Checksum error

Time Needed for Diagnosis: 2 seconds

Malfunction Indicator Light Illumination: Does not illuminate.

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Dtc u0077 lin communication bus "ecm/pcm" off
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Other materials:

Rocking the vehicle
If you must rock the vehicle to free it from snow, sand, or mud, depress the accelerator pedal slightly and move the shift lever/select lever back and forth between "1"/"D" and "R" repeatedly. Do not race the engine. For the best possible traction, avoid spinning the wheels when trying to fre ...

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