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Subaru Legacy Service Manual: Dtc p2127 throttle/pedal position sensor/switch "e" circuit low

Subaru Legacy Service Manual / Engine (diagnostics)(h4do) / Diagnostic procedure with diagnostic trouble code (dtc) / Dtc p2127 throttle/pedal position sensor/switch "e" circuit low

DTC DETECTING CONDITION:

Immediately at fault recognition

TROUBLE SYMPTOM:

Improper idling

Poor driving performance

CAUTION:

After servicing or replacing faulty parts, perform Clear Memory Mode Clear Memory Mode > OPERATION, and Inspection Mode Inspection Mode > PROCEDURE.

WIRING DIAGRAM:

Engine Electrical System ENGINE TYPE FB (WITHOUT PUSH BUTTON START) Engine Electrical System > WIRING DIAGRAM

Engine Electrical System ENGINE TYPE FB (WITH PUSH BUTTON START) Engine Electrical System > WIRING DIAGRAM

STEPCHECKYESNO

1.CHECK HARNESS BETWEEN ECM AND ACCELERATOR PEDAL POSITION SENSOR CONNECTOR.

1) Turn the ignition switch to OFF.

2) Disconnect the connectors from ECM and accelerator pedal position sensor.

3) Measure the resistance between ECM connector and chassis ground.

Connector & terminal

(B134) No. 28 — Chassis ground:

(B134) No. 31 — Chassis ground:

Is the resistance 1 M- or more-

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P2127 THROTTLE/PEDAL POSITION SENSOR/SWITCH "E" CIRCUIT LOW

Repair the short circuit to ground in harness between ECM connector and accelerator pedal position sensor connector.

2.CHECK SHORT CIRCUIT INSIDE THE ECM.

1) Connect the connector to ECM.

2) Measure the resistance between accelerator pedal position sensor connector and chassis ground.

Connector & terminal

(B315) No. 3 — Chassis ground:

Is the resistance 1 M- or more-

Replace the accelerator pedal. Accelerator Pedal

Repair the short circuit to ground in harness between ECM connector and accelerator pedal position sensor connector. Replace the ECM if defective. Engine Control Module (ECM)

1. OUTLINE OF DIAGNOSIS

Detect the open or short circuit of accelerator pedal position sensor 2.

Judge as NG if out of specification.

2. COMPONENT DESCRIPTION

(1)

Engine control module (ECM)

(3)

Accelerator pedal position sensor 2 signal

(4)

Accelerator pedal position sensor

(2)

Accelerator pedal position sensor 1 signal

3. EXECUTION CONDITION

Secondary Parameters

Execution condition

Battery voltage

≥ 6 V

4. GENERAL DRIVING CYCLE

Always perform the diagnosis continuously.

5. DIAGNOSTIC METHOD

If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.

Judgment Value

Malfunction Criteria

Threshold Value

Sensor 2 output voltage

< 0.298 V

Time Needed for Diagnosis: 100 ms

Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.

Dtc p2128 throttle/pedal position sensor/switch "e" circuit high
DTC DETECTING CONDITION:Immediately at fault recognitionTROUBLE SYMPTOM:• Improper idling• Poor driving performanceCAUTION:After servicing or replacing faulty parts, perform Clear Memory M ...

Dtc p2123 throttle/pedal position sensor/switch "d" circuit high
DTC DETECTING CONDITION:Immediately at fault recognitionTROUBLE SYMPTOM:• Improper idling• Poor driving performanceCAUTION:After servicing or replacing faulty parts, perform Clear Memory M ...

Other materials:

Adjustment
1. Remove the bumper face - front. Front Bumper > REMOVALNOTE:Remove the bumper face - front only at the first adjustment.2. Remove the center ring clip from the lock assembly - front hood.NOTE:Remove the center ring clip only at the first adjustment.After adjusting the lock assembly - front hood, ...

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