DTC P2123:00 [PCM (SKYACTIV-G)]
DTC P2123:00 [PCM (SKYACTIV-G)]
SM2334547
id0102t4708400
Outline
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System malfunction location |
APP sensor No.1 circuit high input |
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Detection condition
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• The PCM monitors the input voltage from APP sensor No.1. If the input voltage at the PCM terminal 2BN is above 4.9 V, the PCM determines that the APP sensor No.1 circuit input voltage is high.
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Fail-safe
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• Regulates the upper limit of the APP sensor output.
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Possible cause
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• APP sensor connector or terminals malfunction
• PCM connector or terminals malfunction
• APP sensor No.1 malfunction
• Short to power supply in APP sensor No.1 signal circuit
• Open circuit in APP sensor No.1 ground circuit
• PCM malfunction
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Diagnostic Procedure
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Step |
Inspection |
Results |
Action |
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1
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RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION
• Record the freeze frame data/snapshot data.
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—
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Go to the next step.
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2
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VERIFY RELATED REPAIR INFORMATION OR SERVICE INFORMATION AVAILABILITY
• Verify related Service Bulletins, on-line repair information, or Service Information availability.
• Is any related Information available?
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Yes
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Perform repair or diagnosis according to the available information.
• If the vehicle is not repaired, go to the next step.
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No
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Go to the next step.
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3
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DETERMINE IF APP SENSOR No.1 OR WIRING HARNESS MALFUNCTION
• Access the APP1 PID using the M-MDS. (See PID/DATA MONITOR INSPECTION.)
• Verify the APP1 PID value.
• Is the APP1 PID value 5 V or B+?
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Yes
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Go to Step 7.
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No
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Go to the next step.
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4
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INSPECT APP SENSOR CONNECTOR FOR MALFUNCTION
• Inspect the applicable connector and terminal. (See CONNECTOR INSPECTION.)
• Are the connector and terminal normal?
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Yes
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Go to the next step.
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No
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Repair or replace the malfunctioning location and perform the repair completion verification.
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5
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INSPECT PCM CONNECTOR FOR MALFUNCTION
• Inspect the applicable connector and terminal. (See CONNECTOR INSPECTION.)
• Are the connector and terminal normal?
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Yes
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Go to the next step.
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No
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Repair or replace the malfunctioning location and perform the repair completion verification.
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6
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INSPECT APP SENSOR No.1 FOR MALFUNCTION
• Inspect the applicable part. (See ACCELERATOR PEDAL POSITION (APP) SENSOR INSPECTION [SKYACTIV-G (WITH CYLINDER DEACTIVATION (US))].) (See ACCELERATOR PEDAL POSITION (APP) SENSOR INSPECTION [SKYACTIV-G (WITHOUT CYLINDER DEACTIVATION (US))].)
• Is the part normal?
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Yes
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Go to repair completion verification.
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No
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Repair or replace the malfunctioning location and perform the repair completion verification.
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7
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INSPECT APP SENSOR No.1 SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY
• Switch the ignition off.
• Disconnect the APP sensor connector.
• Access the APP1 PID using the M-MDS. (See PID/DATA MONITOR INSPECTION.)
• Verify the APP1 PID value.
• Is the APP1 PID value 5 V or B+?
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Yes
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Inspect the signal circuit for a short to power supply.
(See CIRCUIT INSPECTION.)
• Repair or replace the malfunctioning location and perform the repair completion verification.
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No
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Go to the next step.
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8
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INSPECT APP SENSOR No.1 GROUND CIRCUIT FOR OPEN CIRCUIT
• Inspect the applicable circuit for open circuit. (See CIRCUIT INSPECTION.)
• Is the circuit normal?
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Yes
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Replace the accelerator pedal and perform the repair completion verification.
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No
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Repair or replace the malfunctioning location and perform the repair completion verification.
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Repair completion verification 1
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VERIFY THAT VEHICLE IS REPAIRED
• Install/connect the part removed/disconnected during the troubleshooting procedure.
• Clear the DTC recorded in the memory. (See CLEARING DTC.)
• Replicate the vehicle conditions at the time the DTC was detected using the following procedure.
• Perform the DTC inspection for the PCM. (See DTC INSPECTION.)
• Is the same Pending DTC present?
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Yes
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Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error.
If the CAN communication is normal, perform the diagnosis from Step 1.
• If the malfunction recurs, replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [SKYACTIV-G (WITH CYLINDER DEACTIVATION (US))].) (See PCM REMOVAL/INSTALLATION [SKYACTIV-G (WITHOUT CYLINDER DEACTIVATION (US))].)
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No
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Go to the next step.
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Repair completion verification 2
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VERIFY IF OTHER DTCs DISPLAYED
• Perform the DTC inspection. (See DTC INSPECTION.)
• Are any other DTCs displayed?
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Yes
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Repair the malfunctioning location according to the applicable DTC troubleshooting.
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No
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DTC troubleshooting completed.
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