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1
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IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA
• Is DTC P0131:00 or P0151:00 on FREEZE FRAME DATA?
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Yes
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Go to the next step.
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No
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Go to troubleshooting procedures for DTC on FREEZE FRAME DATA.
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2
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VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
• Has 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 FREEZE FRAME DATA on the repair order, then go to the next step.
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3
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VERIFY RELATED SERVICE INFORMATION AVAILABILITY
• Verify related Service Information availability.
• Is any related Service Information available?
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Yes
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Perform repair or diagnosis according to the available Service 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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4
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VERIFY RELATED PENDING OR STORED DTC
• Turn the ignition switch off, then to the ON position (engine off).
• Verify the pending code or stored DTCs using the M-MDS.
• Is other DTC present?
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Yes
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Go to the appropriate DTC troubleshooting procedures.
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No
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Go to the next step.
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5
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INSPECT A/F SENSOR CONNECTOR FOR POOR CONNECTION
• Turn the ignition switch off.
• Disconnect the suspect A/F 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 terminal, 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 A/F SENSOR CIRCUIT FOR SHORT TO GROUND
• Suspect A/F sensor connector is disconnected.
• Turn the ignition switch off.
• Inspect for continuity between the following terminals (wiring harness-side) and body ground:
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― P0131:00:
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• A/F sensor (RH) terminal F
• A/F sensor (RH) terminal H
― P0151:00:
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• A/F sensor (LH) terminal F
• A/F sensor (LH) terminal H
• 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 PCM (short to ground in the PCM internal circuit).
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 PCM CONNECTOR FOR POOR CONNECTION
• Suspect A/F sensor connector is disconnected.
• Turn the ignition switch off.
• 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 terminal, 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 A/F SENSOR CIRCUIT FOR OPEN CIRCUIT
• Suspect A/F sensor and PCM connectors are disconnected.
• Turn the ignition switch off.
• Inspect for continuity between the following terminals (wiring harness-side):
-
― P0131:00:
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• A/F sensor (RH) terminal F—PCM terminal 2AG
• A/F sensor (RH) terminal H—PCM terminal 2AC
― P0151:00:
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• A/F sensor (LH) terminal F—PCM terminal 2AK
• A/F sensor (LH) terminal H—PCM terminal 2AE
• 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 A/F SENSOR
• Reconnect all disconnected connectors.
• Inspect the A/F sensor.
• Is there any malfunction?
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Yes
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Replace the A/F sensor, then go to the next step.
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No
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Go to the next step.
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10
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VERIFY TROUBLESHOOTING OF DTC P0131:00, P0151:00 HAS BEEN COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the PCM memory using the M-MDS.
• Perform the KOER self-test.
• Is the PENDING CODE for this 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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Troubleshooting completed.
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