DTC P0123 THROTTLE/PEDAL POSITION SENSOR/SWITCH “A” CIRCUIT HIGH INPUT
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DTC P0123 THROTTLE/PEDAL POSITION
SENSOR/SWITCH “A” CIRCUIT HIGH INPUT
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CHECK CURRENT DATA.
Start the engine.
Read the data of throttle position sensor signal using Vehicle
Diagnostic Interface or OBD-II general scan tool.
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Note
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Vehicle Diagnostic Interface
For detailed operation procedure, refer to the “READ
CURRENT DATA FOR ENGINE”.
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OBD-II general scan tool
For detailed operation procedures, refer to the OBD-II General
Scan Tool Instruction Manual.
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Is the voltage more than 4.7 V?
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Even if malfunction indicator
light lights up, the circuit has returned to a normal condition
at this time. A temporary poor contact of the connector may be the cause.
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Note
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In this case, repair the following:
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Poor contact
in throttle position sensor connector
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Poor contact in ECM connector
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Poor contact in coupling connector
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CHECK HARNESS BETWEEN THROTTLE POSITION SENSOR AND ECM CONNECTOR.
Turn the ignition switch to OFF.
Disconnect the connector from throttle position sensor.
Measure the resistance of harness between throttle
position sensor connector and engine ground.
Connector & terminal
(E13) No. 2 — Engine ground:
Is the resistance less than 5 Ω?
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Repair the harness and connector.
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Note
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In this case, repair the following:
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Open circuit
in harness between throttle position sensor and ECM connector
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Poor contact in coupling connector
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Poor contact in joint connector
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CHECK HARNESS BETWEEN THROTTLE POSITION SENSOR AND ECM CONNECTOR.
Turn the ignition switch to ON.
Measure the voltage between throttle position sensor
connector and engine ground.
Connector & terminal
(E13) No. 3 (+) — Engine ground (−):
Is the voltage more than 4.7 V?
Repair the battery short circuit
in harness between throttle position sensor and ECM connector. After repair,
replace the ECM.
Replace the throttle position sensor.
