DTC P0222 Throttle/Pedal Position Sensor/Switch "B" Circuit Low: Notes

DTC detecting condition:

Immediately at fault recognition

Trouble symptom:

Improper idling
Poor driving performance
Engine stalls.

CAUTION:

After servicing or replacing faulty parts, perform Clear Memory Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>Clear Memory Mode . and Inspection Mode Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>Inspection Mode .
Use the check board when measuring the ECM terminal voltage and resistance.

Wiring diagram:

Engine Electrical System Ref. to WIRING SYSTEM>Engine Electrical System>WIRING DIAGRAM .

Fig 1: Throttle/Pedal Position Sensor/Switch B Circuit Low - Wiring Diagram

G11270554

Courtesy of SUBARU OF AMERICA, INC.

CHECK HARNESS BETWEEN ECM AND ELECTRONIC THROTTLE CONTROL CONNECTOR.
1. Turn the ignition switch to OFF.
2. Disconnect the connectors from electronic throttle control.
3. Disconnect the connector from ECM.
4. Measure the resistance between ECM and engine ground.
  Connector & terminal
  
  (E158) No. 18 - Engine ground:
  
  (E158) No. 29 - Engine ground:
  
  (E158) No. 29 - (E158) No. 28:
Is the resistance 1 MΩ or more?
- Yes: Go to 2.
- No: Repair the short circuit to ground in harness between ECM and electronic throttle control connector.
CHECK SHORT CIRCUIT INSIDE THE ECM.
1. Connect the connector to ECM.
2. Measure the resistance between electronic throttle control connector and engine ground.
  Connector & terminal
  
  (E57) No. 4 - Engine ground:
Is the resistance 1 MΩ or more?
- Yes: Replace the electronic throttle control. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DOTC)>Throttle Body .
- No: Repair the short circuit to ground in harness between ECM and electronic throttle control connector. Replace the ECM if defective. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DOTC)>Engine Control Module (ECM) .