DTC P2016 Intake Manifold Runner Position Sensor / Switch Circuit Low (Bank 1)

DTC DETECTING CONDITION:

Immediately at fault recognition
GENERAL DESCRIPTION < Ref. to DTC P2016 INTAKE MANIFOLD RUNNER POSITION SENSOR / SWITCH CIRCUIT LOW (BANK 1) , Diagnostic Trouble Code (DTC) Detecting Criteria. >

TROUBLE SYMPTOM:

Improper idling
Engine stalls.
Poor driving performance

CAUTION: After repairing or replacing the defective part, perform the Clear Memory Mode < Ref. to OPERATION , Clear Memory Mode. > and Inspection Mode < Ref. to PROCEDURE , Inspection Mode. >.

WIRING DIAGRAM:

Fig 1: Intake Manifold Runner Position Sensor / Switch Circuit Low (Bank 1) - Wiring Diagram

DIAGNOSTIC PROCEDURE

Step	Check	Yes	No
1 CHECK CURRENT DATA. Start the engine. Read the data of tumble generator valve position sensor signal using Subaru Select Monitor or general scan tool. NOTE: Subaru Select Monitor For detailed operation procedure, refer to "READ CURRENT DATA FOR ENGINE". < Ref. to SUBARU SELECT MONITOR . > General scan tool For detailed operation procedure, refer to the general scan tool operation manual.	Is the voltage less than 0.1 V?	Go to step 2.	Even if the malfunction indicator light illuminates, the circuit has returned to a normal condition at this time. A temporary poor contact of the connector may be the cause. NOTE: In this case, repair the following item: Poor contact of tumble generator valve position sensor connector Poor contact in ECM connector Poor contact of coupling connector
2 CHECK INPUT SIGNAL OF ECM. Measure the voltage between ECM connector and chassis ground while throttle valve is fully closed. Connector & terminal (B136) No. 16 (+) - Chassis ground (-):	Is the voltage more than 4.5 V?	Go to step 4.	Go to step 3.
3 CHECK INPUT SIGNAL OF ECM. Measure the voltage between ECM connector and chassis ground. Connector & terminal (B136) No. 16 (+) - Chassis ground (-):	Does the voltage change when shaking the harness and connector of the ECM while monitoring the value with a voltage meter?	Repair the poor contact of ECM connector.	Contact with SOA Service Center.
4 CHECK INPUT SIGNAL OF ECM. Measure the voltage between ECM connector and chassis ground. Connector & terminal (B136) No. 27 (+) - Chassis ground (-):	Is the voltage less than 0.1 V?	Go to step 6.	Go to step 5.
5 CHECK INPUT SIGNAL FOR ECM (USING SUBARU SELECT MONITOR). Measure the voltage between ECM connector and chassis ground.	Does the voltage change by shaking the harness and connector of the ECM while monitoring the value with Subaru Select Monitor?	Repair the poor contact of ECM connector.	Go to step 6.
6 CHECK HARNESS BETWEEN ECM AND TUMBLE GENERATOR VALVE POSITION SENSOR CONNECTOR. Turn the ignition switch to OFF. Disconnect the connector from tumble generator valve position sensor. Turn the ignition switch to ON. Measure the voltage between the tumble generator valve position sensor connector and engine ground. Connector & terminal (E54) No. 1 (+) - Engine ground (-):	Is the voltage more than 4.5 V?	Go to step 7.	Repair the harness and connector. NOTE: In this case, repair the following item: Open circuit of harness between tumble generator valve position sensor and ECM connector Poor contact of throttle position sensor connector Poor contact in ECM connector Poor contact of coupling connector Poor contact of joint connector
7 CHECK HARNESS BETWEEN ECM AND TUMBLE GENERATOR VALVE POSITION SENSOR CONNECTOR. Turn the ignition switch to OFF. Measure the resistance of harness between ECM connector and tumble generator valve position sensor connector. Connector & terminal (B136) No. 27 - (E54) No. 3:	Is the resistance less than 1 Ω?	Go to step 8.	Repair the harness and connector. NOTE: In this case, repair the following item: Open circuit of harness between tumble generator valve position sensor and ECM connector Poor contact in ECM connector Poor contact of tumble generator valve position sensor connector Poor contact of coupling connector
8 CHECK HARNESS BETWEEN ECM AND THROTTLE POSITION SENSOR CONNECTOR. Measure the resistance of the harness between the tumble generator valve position sensor connector and engine ground. Connector & terminal (E54) No. 3 - Engine ground:	Is the resistance more than 1 MΩ?	Go to step 9.	Repair the ground short circuit of the harness between the tumble generator valve position sensor and ECM connector.
9 CHECK POOR CONTACT. Check for poor contact in the tumble generator valve position sensor connector.	Is there poor contact in the tumble generator valve position sensor connector?	Repair poor contact of the tumble generator valve position sensor connector.	Replace the tumble generator valve position sensor. < Ref. to TUMBLE GENERATOR VALVE POSITION SENSOR . >