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DTC P2123 THROTTLE/PEDAL POSITION SENSOR/SWITCH “D” CIRCUIT HIGH INPUT

DTC P2123 THROTTLE/PEDAL POSITION SENSOR/SWITCH “D” CIRCUIT HIGH INPUT

OUTLINE OF DIAGNOSIS

Detect the open or short circuit of accelerator pedal position sensor 1.

Judge NG when out of the standard value.

COMPONENT DESCRIPTION


(1)

Engine control module (ECM)

(3)

Accelerator pedal position sensor 2 signal.

(2)

Accelerator pedal position sensor 1 signal.

(4)

Accelerator pedal position sensor



ENABLE CONDITION

Secondary Parameters Enable Conditions
Ignition switch

ON



GENERAL DRIVING CYCLE

Always perform the diagnosis continuously.

DIAGNOSTIC METHOD

Judge OK and clear the NG when the malfunction criteria below are completed.

Judgment Value

Malfunction Criteria Threshold Value
Sensor 1 input voltage

≤ 4.865 V



Time Needed for Diagnosis: 80 milliseconds

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

DTC CLEAR CONDITION


When the OK idling cycle was completed 40 times in a row

When “Clear Memory” was performed (Only engine stop)


MALFUNCTION INDICATOR LIGHT CLEAR CONDITION


When the OK driving cycle was completed 3 times in a row

When “Clear Memory” was performed (Only engine stop)


FAIL SAFE


Single malfunction: Control with normal sensor

Multi malfunction: Fix the throttle opening angle to 6°.


ECM OPERATION AT DTC SETTING

Memorize the freeze frame data. (For test mode $02)