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 AND DIAGNOSTIC MONITORING TEST RESULTS HAVE BEEN RECORDED
• Have FREEZE FRAME DATA and DIAGNOSTIC MONITORING TEST RESULTS (HO2S related) 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 and DIAGNOSTIC MONITORING TEST RESULTS 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 next step.
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No
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Go to next step.
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3
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VERIFY RELATED PENDING AND STORED DTCS
• Turn the ignition switch off, then ON (Engine OFF).
• Verify pending and /or stored DTCs using WDS or equivalent.
• Is the P0433 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 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 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 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 next step.
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6
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INSPECT INSTALLATION OF FRONT HO2S
• Check if front HO2S is loosely installed.
• Is sensor installed securely?
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Yes
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Go to next step.
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No
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Retighten sensor, then go to Step 14.
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7
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INSPECT GAS LEAKAGE FROM EXHAUST SYSTEM
• Visually check if any gas leakage is found between exhaust manifold and front HO2S.
• Is there any gas leakage?
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Yes
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Repair or replace any faulty 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 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 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 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 suspected parts.
• If all items above are normal, replace 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 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 next step.
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No
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Inspect fuel pump circuit for open or poor connection.
• Repair or replace suspected circuit.
• If circuit is normal, replace 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 follows:
• Restriction or clogging at fuel filter (high-pressure side)
• Foreign materials or stain inside fuel filter (low-pressure side)
Perform following actions as result.
• If restriction or clogging is found at fuel filter (high-pressure side), replace fuel filter.
• If foreign materials or stain is found inside fuel filter (low-pressure side), clean of fuel tank and filter.
• If all items above are normal, replace pressure regulator.
Then go to Step 14.
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13
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INSPECT SEALING OF ENGINE COOLANT PASSAGE
• Remove 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 faulty parts, then go to next step.
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No
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Go to 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 ON (Engine OFF).
• Clear DTC from memory using WDS or equivalent.
• Start 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 following TEST # values:
• Are they all below MAX value?
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Yes
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Replace PCM, then go to next step.
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No
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Go to next step.
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15
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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 applicable DTC inspection.
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No
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Troubleshooting completed.
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