Subaru Legacy BN/BS (2015-2019) Service Manual: Dtc p2158 vehicle speed sensor "b" circuit

Subaru Legacy BN/BS (2015-2019) Service Manual / Continuously variable transmission (diagnostics) / Diagnostic procedure with diagnostic trouble code (dtc) / Dtc p2158 vehicle speed sensor "b" circuit

DTC DETECTING CONDITION:

Immediately at fault recognition

TROUBLE SYMPTOM:

VDC does not operate.

STEP	CHECK	YES	NO
1.CHECK DTC. Read the DTC of VDC system using the Subaru Select Monitor.	Is DTC displayed-	Perform the diagnosis according to DTC. List of Diagnostic Trouble Code (DTC)	Repair the poor contact of connector and harness between VDCCM&H/U and wheel speed sensor.

1. OUTLINE OF DIAGNOSIS

• Judge the malfunction of VDC wheel speed sensor.

• Judge as NG when the wheel speed sensor normal status signal from VDC is cleared.

2. EXECUTION CONDITION

Secondary Parameters	Execution condition
12 V battery system voltage	≥ 10.9 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

Signal of malfunction from Vehicle Dynamics Control Module

NOTE:

The VDC controller detects malfunction if one of the speed sensors does not output a signal and the other vehicle speed sensor output signal is above 7.46 MPH.

Time Needed for Diagnosis: 2.5 seconds

Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.

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