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

DTC detecting condition:

Immediately at fault recognition

Trouble symptom:

Improper idling

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 .

Wiring diagram:

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

G14614581

Courtesy of SUBARU OF AMERICA, INC.

G14614434

Courtesy of SUBARU OF AMERICA, INC.

G14614583

Courtesy of SUBARU OF AMERICA, INC.

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
  
  (B61) 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

(E51) 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) .