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Home >> Subaru >> 2005 >> Outback i, Automatic >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - Engine (Diagnostics) (H4SO U5 (PZEV)) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P2127 Throttle/Pedal Position Sensor/Switch "E" Circuit Low Input >> Wiring Diagram:
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Wiring Diagram:

Fig 1: Wiring Diagram - DTC P2127 Throttle/Pedal Position Sensor/Switch
G03829092Courtesy of SUBARU OF AMERICA, INC.
DTC P2127 DIAGNOSTIC PROCEDURE

Step Check Yes No
1. CHECK OUTPUT VOLTAGE OF ACCELERATOR POSITION SENSOR. 
  1. Turn the ignition switch to ON.
  2. Read the data of sub accelerator position sensor signal using Subaru Select Monitor.
NOTE: Subaru Select Monitor
For detailed operation procedure, refer to "READ CURRENT DATA FOR ENGINE". < Ref. to , SUBARU SELECT MONITOR . >
 Is the voltage more than 0.4 V? Go to step 2.  Go to step 3. 
2. CHECK POOR CONTACT IN CONNECTORS. 
Check poor contact in connectors between ECM and accelerator position sensor.		 Is there any poor contact in connectors between ECM and accelerator position sensor? Repair the poor contact in connectors. Connector has returned to its normal condition at this time. A temporary poor contact in the connector might have been the cause.
3. CHECK HARNESS BETWEEN ECM AND ACCELERATOR POSITION SENSOR. 
  1. Turn the ignition switch to OFF.
  2. Disconnect the connector from ECM.
  3. Disconnect the connector from accelerator position sensor.
  4. Measure the resistance between ECM connector and accelerator position sensor.

    Connector & terminal 

    (B136) No. 28 - (B315) No. 2: 

    (B136) 16 - (B315) No. 1: 

 Is the resistance less than 1 Ω? Go to step 4.  Repair the open harness connector.
4. CHECK HARNESS BETWEEN ECM AND ACCELERATOR POSITION SENSOR. 
Measure the resistance between ECM connector and chassis ground.

Connector & terminal 

(B136) No. 28 - Chassis ground: 

(B136) No. 16 - Chassis ground: 

 Is the resistance more than 1 MΩ? Go to step 5.  Repair the ground short of harness.
5. CHECK POWER SUPPLY TO ACCELERATOR POSITION SENSOR. 
  1. Connect the ECM connector.
  2. Turn the ignition switch to ON.
  3. Measure the voltage between accelerator position sensor connector and chassis ground.

    Connector & terminal 

    (B315) 1 (+) - Chassis ground (-): 

 Is the voltage 4.5 - 5.5 V? Go to step 6.  Repair the poor contact in ECM connector. If problem persists, replace the ECM. < Ref. to ENGINE CONTROL MODULE (ECM) . >
6. CHECK ACCELERATOR POSITION SENSOR. 
Measure the resistance of accelerator position sensor.

Terminals 

No. 1 - No. 6: 

 Is the resistance 0.75 - 3.15 kΩ? Go to step 7.  Replace the accelerator position sensor.
7. CHECK ACCELERATOR POSITION SENSOR. 
Measure the resistance of accelerator position sensor when accelerator pedal is released.

Terminals 

No. 2 - No. 6: 

 Is the resistance 0.15 - 0.63 kΩ? Go to step 8.  Replace the accelerator position sensor.
8. CHECK ACCELERATOR POSITION SENSOR. 
Measure the resistance of accelerator position sensor when acceleration pedal is being depressed.

Terminals 

No. 2 - No. 6: 

 Is the resistance 0.28 - 1.68 kΩ? Repair the poor contact in ECM connector. If problem persists, replace the ECM. Replace the accelerator position sensor.
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