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 stall
Wiring diagram:

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

Courtesy of SUBARU OF AMERICA, INC.

CAUTION: Use the check board when measuring the ECM terminal voltage and resistance. Ref. to ENGINE (DIAGNOSTICS) (H4DO)>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) (H4DO)>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE .
1. CHECK DTC .
  1. Turn the ignition switch to ON.
  2. Using the Subaru Select Monitor or a general scan tool, read the DTC of [Engine]. Ref. to COMMON (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .
  Is DTC P0222 displayed? (Current code)
  
  Yes : Go to 2.
  
  No : Even if DTC is detected, the circuit has returned to a normal condition at this time.
  
  Reproduce the failure, and then perform the diagnosis again.
2. CHECK FOR POOR CONTACT .
  1. Turn the ignition switch to OFF.
  2. Check for poor contact of ECM and electronic throttle control connector.
  Is there poor contact in ECM or electronic throttle control connector?
  
  Yes : Repair the poor contact of ECM or electronic throttle control connector.
  
  No : Go to 3.
3. CHECK HARNESS BETWEEN ECM AND ELECTRONIC THROTTLE CONTROL CONNECTOR (OPEN) .
  1. Disconnect the connector from ECM.
  2. Disconnect the connectors from electronic throttle control.
  3. Measure the resistance of harness between ECM connector and electronic throttle control connector.
    Connector & terminal
    
    (E158) No. 43 - (E57) No. 4:
    
    (E158) No. 27 - (E57) No. 5:
  Is the resistance less than 1 Ω?
  
  Yes : Go to 4.
  
  No : Repair the open circuit of harness between ECM connector and electronic throttle control connector.
4. CHECK HARNESS BETWEEN ECM AND ELECTRONIC THROTTLE CONTROL CONNECTOR (SHORT TO GROUND) .
  Measure the resistance between the ECM connector and engine ground.
  
  Connector & terminal
  
  (E158) No. 43 - Engine ground:
  
  (E158) No. 43 - Engine ground:
  
  Is the resistance 1 MΩ or more?
  
  Yes : Go to 5.
  
  No : Repair the ground short circuit of harness between ECM connector and electronic throttle control connector.
5. CHECK POWER SUPPLY OF ELECTRONIC THROTTLE CONTROL .
  1. Connect the connector to ECM.
  2. Turn the ignition switch to ON.
  3. Measure the voltage between electronic throttle control connector and engine ground.
    Connector & terminal
    
    (E57) No. 5 (+) - Engine ground (-):
  Is the voltage 4.5 - 5.5 V?
  
  Yes : Replace the electronic throttle control. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DO)>THROTTLE BODY .
  
  No : Replace the ECM. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DO)>ENGINE CONTROL MODULE (ECM) .