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Subaru Legacy Service Manual: Dtc p0601 internal control module memory checksum error

DTC DETECTING CONDITION:

Detected when two consecutive driving cycles with fault occur.

TROUBLE SYMPTOM:

TCM ROM malfunction

STEPCHECKYESNO

1.CHECK DTC.

1) Perform the Clear Memory Mode using the Subaru Select Monitor. Clear Memory Mode

2) Read the DTC.

Is DTC P0601 displayed-

Replace the TCM. Transmission Control Module (TCM) Transmission Control Module (TCM)

Current condition is normal. Check for interference from noise, etc.

1. OUTLINE OF DIAGNOSIS

Judge the malfunction in ROM area of the TCM.

Judge as NG when the consistency in the ROM area is lost.

2. EXECUTION CONDITION

Secondary Parameters

Execution condition

12 V battery system voltage

≥ 9 V

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

Checksum (ROM)

Error

Time Needed for Diagnosis: Immediately

Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.

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