DTC P06B2: Sensor Power Supply "A" Circuit High: Notes

-
DTC detecting condition:

Immediately at fault recognition

Trouble symptom:

Improper idling

Wiring diagram:

Engine Electrical System Ref. to WIRING SYSTEM>ENGINE ELECTRICAL SYSTEM .

G16446396

Courtesy of SUBARU OF AMERICA, INC.

G16446248

Courtesy of SUBARU OF AMERICA, INC.

G16446398

Courtesy of SUBARU OF AMERICA, INC.

CAUTION: Use the check board when measuring the ECM terminal voltage and resistance. Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>GENERAL DESCRIPTION>PREPARATION TOOL>HOW TO USE CHECK BOARD .

NOTE: After the faulty parts are repaired or replaced, perform the final check in Basic Diagnostic Procedure. Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE .

CHECK HARNESS BETWEEN ECM AND ACCELERATOR PEDAL POSITION SENSOR CONNECTOR (SHORT TO POWER SUPPLY) .
1. Turn the ignition switch to OFF.
2. Disconnect the connector from ECM.
3. Measure the voltage between ECM connector and engine ground.
  Connector & terminal
  
  (B134) No. 51 (+) - Engine ground (-):
Is the voltage 10 V or more?

Yes: Repair the short circuit to power supply in harness between ECM connector and accelerator pedal position sensor connector.

No: Go to 2.
CHECK HARNESS BETWEEN ECM AND EACH SENSOR CONNECTOR (SHORT TO POWER SUPPLY) .
Measure the voltage between ECM connector and engine ground.

Connector & terminal

(E158) No. 1 (+) - Engine ground (-):

Is the voltage 10 V or more?

Yes: Repair the short circuit to power in harness between the ECM connector and the following sensor connector.
- Manifold absolute pressure and intake air temperature sensor
- Tumble generator valve actuator RH
- Tumble generator valve actuator LH
No: Replace the ECM. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DOTC)>ENGINE CONTROL MODULE (ECM) .