DTC P2127:00 [MZ-CD 1.6]
id0102g8708500
DTC P2127:00 |
Accelerator pedal position (APP) sensor No.2 circuit low |
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DETECTION CONDITION
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• The PCM monitors the accelerator pedal depression amount using the duty signal from APP sensor No.2. If the duty valve from APP sensor No.2 is less than 5 %, the determines that the APP sensor No.2 circuit malfunction.
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POSSIBLE CAUSE
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• Communication error between instrument cluster and PCM
• APP sensor connector or terminals malfunction
• Short to ground in wiring harness between the following terminals:
• Instrument cluster connector or terminals malfunction
• APP sensor No.2 signal circuit and ground circuit are shorted to each other
• Open circuit in wiring harness between the following terminals:
• APP sensor No.2 malfunction
• Instrument cluster malfunction
• PCM malfunction
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Diagnostic procedure
STEP |
INSPECTION |
ACTION |
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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 STORED CAN COMMUNICATION DTC IN PCM AND INSTRUMENT CLUSTER
• Retrieve the PCM and instrument cluster DTC using the M-MDS.
• Is the CAN communication DTC present?
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Yes
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Go to the applicable DTC inspection.
(See DTC TABLE [MZ-CD 1.6].)
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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.2 CIRCUIT FOR SHORT TO GROUND
• APP sensor connector is disconnected.
• Inspect for continuity between the following terminals (wiring harness-side) and body ground:
• Is there continuity?
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Yes
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If the short to ground circuit could be detected:
• Repair or replace the wiring harness for a possible short to ground.
If the short to ground circuit could not be detected:
• Replace the instrument cluster (short to ground in the instrument cluster internal circuit).
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 INSTRUMENT CLUSTER CONNECTOR CONDITION
• Disconnect the instrument cluster 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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7
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INSPECT APP SENSOR NO.2 SIGNAL CIRCUIT AND GROUND CIRCUIT FOR SHORT TO EACH OTHER
• APP sensor and instrument cluster connectors are disconnected.
• Inspect for continuity between APP sensor terminals B and C (wiring harness-side).
• 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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8
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INSPECT APP SENSOR NO.2 CIRCUIT FOR OPEN CIRCUIT
• APP sensor and instrument cluster connectors are disconnected.
• Inspect for continuity between the following terminals (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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9
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INSPECT APP SENSOR NO.2
• Reconnect all disconnected connectors.
• Inspect the APP sensor No.2.
• 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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Replace the instrument cluster, then go to the next step.
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10
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VERIFY THAT DTC P2127:00 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.
(See DTC TABLE [MZ-CD 1.6].)
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No
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DTC troubleshooting completed.
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