Diagnostic procedure
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STEP
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INSPECTION
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ACTION
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1
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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 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 OR STORED DTC
• Turn the ignition switch off, then to the ON position (Engine off).
• Verify the related PENDING CODE or stored DTCs.
• Is the DTC P2177 or P2187 also present?
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Yes
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Go to the appropriate DTC inspection.
(See DTC TABLE [ZY, Z6].)
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No
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Go to the next step.
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4
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IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA
• Is DTC P2195 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 the FREEZE FRAME DATA DTC inspection.
(See DTC TABLE [ZY, Z6].)
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5
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VERIFY CURRENT INPUT SIGNAL STATUS
• Connect the WDS or equivalent to the DLC-2.
• Verify the following PIDs.
(See PCM INSPECTION [ZY, Z6].)
• Are the PIDs normal?
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Yes
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Go to the next step.
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No
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Inspect the malfunctioning part according to the inspection results.
Then go to Step 13.
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6
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VERIFY CURRENT INPUT SIGNAL STATUS UNDER FREEZE FRAME DATA CONDITION
• Connect the WDS or equivalent to the DLC-2.
• Verify the following PIDs under the FREEZE FRAME DATA condition.
(See PCM INSPECTION [ZY, Z6].)
• Are the PIDs normal?
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Yes
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Go to the next step.
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No
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Inspect the malfunctioning part according to the inspection results.
Then go to Step 13.
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7
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INSPECT INTAKE-AIR SYSTEM FOR EXCESSIVE AIR SUCTION
• Visually inspect the hose in the intake-air system for looseness, cracks or damages.
• Is there any malfunction?
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Yes
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Repair or replace the malfunctioning part, then go to Step 13.
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No
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Go to the next step.
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8
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VERIFY CURRENT INPUT SIGNAL STATUS OF MAF SENSOR
• Connect the WDS or equivalent to the DLC-2.
• Start the engine.
• Access the MAF PID.
• Verify that the MAF PID changes quickly according to engine speed.
• Is the PID normal?
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Yes
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Go to the next step.
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No
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Replace the MAF/IAT sensor, then go to Step 13.
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9
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INSPECT FRONT HO2S
• Inspect the front HO2S.
• Is there any malfunction?
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Yes
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Replace the front HO2S, then go to Step 13.
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No
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Go to the next step.
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10
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INSPECT FUEL INJECTOR
• Inspect the fuel injector.
(See FUEL INJECTOR INSPECTION.)
• Is there any malfunction?
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Yes
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Replace suspected fuel injector, then go to Step 13.
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No
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Go to the next step.
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11
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INSPECT FUEL LINE PRESSURE
• Perform the "FUEL LINE PRESSURE INSPECTION".
• Is there any malfunction?
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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 Step 13.
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12
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INSPECT FUEL SYSTEM FOR FUEL LEAKAGE
• Visually inspect the fuel system for fuel leakage.
• Is there fuel leakage?
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Yes
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Repair or replace the malfunctioning part, then go to the next step.
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No
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Replace the fuel pump unit, then go to the next step.
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13
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VERIFY TROUBLESHOOTING OF DTC P2195 COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the PCM memory using the WDS or equivalent.
• Perform the "HO2S heater, HO2S, and TWC Repair Verification Drive Mode".
(See OBD DRIVE MODE [ZY, Z6].)
• Is the PENDING CODE for this DTC present?
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Yes
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Replace the PCM, then go to the next step.
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No
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Go to the next step.
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14
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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 [ZY, Z6].)
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No
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DTC troubleshooting completed.
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