Subaru Legacy BN/BS (2015-2019) Service Manual: Dtc p0716 input/turbine shaft speed sensor "a" circuit range/performance

Subaru Legacy BN/BS (2015-2019) Service Manual / Continuously variable transmission (diagnostics) / Diagnostic procedure with diagnostic trouble code (dtc) / Dtc p0716 input/turbine shaft speed sensor "a" circuit range/performance

DTC DETECTING CONDITION:

Immediately at fault recognition

TROUBLE SYMPTOM:

• No lock-up occurs.

• Shock occurs when selecting shift position.

• Shift control malfunction

STEP	CHECK	YES	NO
1.CHECK DTC. Read the DTC using Subaru Select Monitor.	Besides DTC P0716, is DTC U0122 or U0416 displayed-	Perform the diagnosis according to DTCs other than P0716.	Perform the diagnosis according to DTC P0717. Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0717 INPUT/TURBINE SHAFT SPEED SENSOR "A" CIRCUIT NO SIGNAL

1. OUTLINE OF DIAGNOSIS

• Detect the malfunction of turbine speed sensor signal characteristics.

• Judge as NG if the turbine speed against the engine speed is outside the possible range considering the hardware capabilities.

2. EXECUTION CONDITION

Secondary Parameters	Execution condition
12 V battery system voltage	≥ 10 V
Engine speed	≥ 500 rpm

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
Measured turbine shaft speed	< Table 1 rpm

Table 1

Engine speed (rpm)	3700	3727	3755	3782	3856	4019	4213	4456
Measured turbine shaft speed (rpm)	0	500	1000	1500	2000	2500	3000	3500

Engine speed (rpm)	4786	5213	5651	6101	6569	7044	7520
Measured turbine shaft speed (rpm)	4000	4500	5000	5500	6000	6500	7000

Time Needed for Diagnosis: 10 seconds

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

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