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Home >> Subaru >> 2013 >> Tribeca >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls (Diagnostics) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P0122 Throttle/Pedal Position Sensor/Switch "A" Circuit Low >> Diagnostic Procedure

Diagnostic Procedure

DIAGNOSTIC PROCEDURE

Step Check Yes No
1 CHECK HARNESS BETWEEN ECM AND ELECTRONIC THROTTLE CONTROL. 
  1. Turn the ignition switch to OFF.
  2. Disconnect the connectors from ECM and electronic throttle control.
  3. Measure the resistance between ECM and chassis ground.

    Connector & terminal 

    (B134) No. 19 - Chassis ground: 

    (B134) No. 18 - Chassis ground: 

    (B134) No. 18 - (B136) No. 4: 

 Is the resistance 1 MΩ or more? Go to step 2  . Repair the short circuit to ground in harness between ECM and electronic throttle control connector.
2 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. 6 - Engine ground: 

 Is the resistance 1 MΩ or more? Replace the electronic throttle control. Refer to THROTTLE BODY . > Repair the short circuit to ground in harness between ECM and electronic throttle control connector. Replace the ECM if defective. Refer to ENGINE CONTROL MODULE (ECM) . >
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