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1
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VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
• Has the FREEZE FRAME DATA been recorded?
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Yes
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Go to the next step.
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No
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Record the FREEZE FRAME DATA on the repair order, then go to the next step.
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2
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VERIFY RELATED REPAIR INFORMATION AVAILABILITY
• Verify related service repair information availability.
• Is any related repair information available?
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Yes
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Perform repair or diagnosis according to the available repair 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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VERIFY RELATED PENDING CODE AND/OR DTC
• Switch the ignition to ON (engine off).
• Perform the Pending Trouble Code Access Procedure and DTC Reading Procedure.
• Is the other PENDING CODE/DTC also present?
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Yes
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Go to the applicable DTC inspection.
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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 CONDITION
• Switch the ignition to OFF.
• Disconnect the APP sensor connector.
• Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
• Is there any malfunction?
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Yes
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Repair or replace the connector and/or terminals, then go to Step 10.
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No
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Go to the next step.
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5
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INSPECT APP SENSOR NO.1 POWER SUPPLY CIRCUIT AND SIGNAL CIRCUIT FOR SHORT TO EACH OTHER
• APP sensor and PCM connectors are disconnected.
• Switch the ignition to OFF.
• Inspect for continuity between APP sensor terminals E and F.
• Is there continuity?
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Yes
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Repair or replace the wiring harness for a possible short to each other, then go to Step 10.
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No
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Go to the next step.
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6
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INSPECT APP SENSOR NO.1 SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY
• APP sensor and PCM connectors are disconnected.
• Switch the ignition to ON position (engine off).
• Measure the voltage at the APP sensor terminal E (wiring harness-side).
• Is there any voltage?
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Yes
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Repair or replace the wiring harness for a possible short to power supply, then go to Step 10.
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No
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Go to the next step.
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7
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INSPECT APP SENSOR NO.1 GROUND CIRCUIT FOR OPEN CIRCUIT
• APP sensor and PCM connectors are disconnected.
• Inspect for continuity between APP sensor terminal D (wiring harness-side) and PCM terminal 1AB (wiring harness-side).
• Is there continuity?
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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 wiring harness for a possible open circuit, then go to Step 10.
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8
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INSPECT APP SENSOR NO.1
• Reconnect all disconnected connectors.
• Inspect the APP sensor No.1.
• Is there any malfunction?
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Yes
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Replace the accelerator pedal, then go to the next step.
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No
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Go to the next step.
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9
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INSPECT PCM CONNECTOR CONDITION
• Disconnect the PCM connector.
• Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
• Is there any malfunction?
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Yes
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Repair or replace the connector and/or terminals, then go to Step 10.
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No
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Go to the next step.
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10
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VERIFY THAT DTC P2123:00 TROUBLESHOOTING IS COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the PCM memory using the M-MDS.
• Run the vehicle under the FREEZE FRAME DATA stored condition.
• Is the same DTC present?
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Yes
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Repeat the inspection from Step 1.
• If the malfunction recurs, replace the PCM.
Go to the next step.
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No
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Go to the next step.
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11
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VERIFY AFTER REPAIR PROCEDURE
• Perform the after repair procedure.
• Are any DTCs present?
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Yes
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Go to the applicable DTC inspection.
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No
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DTC troubleshooting completed.
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