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 FREEZE FRAME DATA on repair order, then go to the next step.
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2
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VERIFY RELATED SERVICE INFORMATION AVAILABILITY
• Check for 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 available Service Information.
• If 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 AND STORED DTCS
• Turn the ignition switch off, then to the ON position (Engine off).
• Verify pending and /or stored DTCs using WDS or equivalent.
• Is the following DTC also present?
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Yes
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Go to appropriate DTC troubleshooting procedures, then go to Step 14.
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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 P0133 or P0153 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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5
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VERIFY CURRENT INPUT SIGNAL STATUS
• Warm up the engine.
• Access O2S11 for P0133 or O2S21 for P0153 PID using WDS or equivalent.
• Check PID under following accelerator pedal conditions (in PARK).
• Is PID reading normal?
- Above 0.55 V when suddenly depress accelerator pedal (rich condition). - Below 0.55 V just after release of accelerator pedal (lean condition). |
Yes
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Go to step 8.
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No
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Go to the next step.
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6
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INSPECT INSTALLATION OF FRONT HO2S
• Inspect if the front HO2S is loosely installed.
• Is the sensor installed securely?
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Yes
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Go to the next step.
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No
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Retighten the sensor, then go to Step 14.
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7
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INSPECT GAS LEAKAGE FROM EXHAUST SYSTEM
• Visually inspect if any gas leakage is found between the exhaust manifold and the front HO2S.
• Is there any gas leakage?
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Yes
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Repair or replace the malfunctioning exhaust parts, then go to Step 14.
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No
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Replace sensor, then go to Step 14.
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8
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INSPECT LONG TERM FUEL TRIM
• Access the following PIDs
• Compare it with FREEZE FRAME DATA (FFD) recorded at Step 1.
• Is it below FFD value?
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Yes
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Engine is driven under rich condition. Go to the next step.
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No
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Engine is driven under lean condition. Go to step 10.
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9
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INSPECT FUEL LINE PRESSURE (Excessive fuel line pressure)
• Turn the ignition switch off.
• Inspect fuel line pressure while engine running.
• Is fuel line pressure 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 fuel pump maximum pressure and fuel return pipe for clogged.
• If any problem is found, repair or replace the malfunctioning parts.
• If all items above are normal, replace the pressure regulator.
Then go to Step 14.
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10
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INSPECT FUEL LINE PRESSURE (Low fuel line pressure)
• Turn the ignition switch off.
• Inspect fuel line pressure while engine running.
• Is fuel line pressure normal?
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Yes
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Go to step 14.
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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 PUMP MAXIMUM PRESSURE
• Perform fuel pump maximum pressure test.
• Is fuel pump maximum pressure 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 fuel pump circuit for open or poor connection.
• Repair or replace the circuit.
• If circuit is normal, replace the fuel pump.
Then go to Step 14.
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12
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INSPECT FUEL LINE FROM FUEL PUMP TO FUEL DELIVERY PIPE
• Visually inspect fuel line for any leakage.
• Is any fuel leakage found?
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Yes
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Replace suspected fuel line, then go to Step 14.
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No
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Inspect fuel filters for the follows:
• Restriction or clogging at the fuel filter (high-pressure side)
• Foreign materials or stain inside the fuel filter (low-pressure side)
Perform following actions as result.
• If restriction or clogging is found at the fuel filter (high-pressure side), replace the fuel filter.
• If foreign materials or stain is found inside the fuel filter (low-pressure side), clean off the fuel tank and filter.
• If all items above are normal, replace the pressure regulator.
Then go to Step 14.
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13
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INSPECT SEALING OF ENGINE COOLANT PASSAGE
• Remove the radiator cap.
• Implement procedure to bleed air from engine coolant, then run engine at idle.
• Is there any small bubble, which makes engine coolant white at filling opening?
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Yes
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Air gets in from poor sealing on head gasket or other areas between combustion chamber and engine coolant passage.
Repair or replace the malfunctioning parts, 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 TROUBLESHOOTING OF DTC P0133 or P0153 COMPLETED
• Make sure to reconnect all disconnected connectors.
• Turn the ignition switch to the ON position (Engine off).
• Clear the DTC from the PCM memory using the WDS or equivalent.
• Start the engine.
• Run PCM adaptive memory procedure drive mode and HO2S heater, HO2S, and TWC repair verification drive mode. (European (L.H.D.) specs.)
• Run PCM adaptive memory procedure drive mode and HO2S heater, HO2S, and EGR system repair verification drive mode. (Australian, General (L.H.D. R.H.D.) specs.)
• Stop vehicle and access ON BOARD SYSTEM READINESS TEST to inspect DRIVE MODE completion status.
• Verify RFC changes to YES for OXYGEN SENSOR.
• Access DIAGNOSTIC MONITORING TEST RESULTS.
• Verify the following TEST # values:
• Are they all below MAX value?
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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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16
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VERIFY AFTER REPAIR PROCEDURE
• Perform "After Repair Procedure".
(See AFTER REPAIR PROCEDURE [AJ].)
• Is there any DTC 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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