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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 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 next step.
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No
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Go to next step.
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3
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INDETIFY TRIGGER DTC FOR FEEZE FRAME DATA
• Is DTC 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 FREEZE FRAME DATA DTC inspection.
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4
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HO2S-21 RESPONSE TEST
• Connect the WDS or equivalent to DLC.
• Turn the ignition switch to ON.
• Select Generic OBD Function from the menu and trigger.
• Press continue.
• Select Diagnostic Monitoring Test Results from menu and press trigger.
• Scroll to Test ID: 01 and press trigger.
• Turn the ignition switch to OFF.
• Is the indicated value greater than minimum threshold?
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Yes
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Intermittent malfunction exist, go to Step 11.
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No
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Go to the next step.
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5
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CHECK FOR UNMETERED AIR LEAKS
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Note
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• Fuel calculations can be affected by unmetered air leaks.
• Carefully inspect the following areas for potential air leaks:
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- Hoses connecting to MAF sensor assembly
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- Hoses connecting to throttle body
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- Intake manifold gaskets leaks
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- PCV disconnected
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- Vacuum lines disconnected
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- Improperly seated engine oil dipstick, tube, and oil fill cap
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- Exhaust leaks at flanges and gaskets
• Are there any air leaks present?
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Yes
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Repair or replace for malfunctioning part, then go to Step 11.
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No
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Go to the next step.
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6
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CHECK HO2S-21 CIRCUIT WIRING
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Note
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• Refer to the PCM connector pin number in the beginning of this pinpoint test.
• Disconnect HO2S-21 connector.
• Check for water for contamination.
• Jumper HO2S-21 signal to VPWR at the HO2S-21 harness connector.
• Connect the WDS or equivalent to the DLC.
• Turn the ignition switch to ON.
• Access O2S21 PID.
• Does the O2S21 PID indicate greater than 1.50 V?
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Yes
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Replace HO2S-21 and oil filter.
Then go to Step 11.
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No
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Go to the next step.
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7
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CHECK HO2S SIGNAL AND SIGNAL RETURN CIRCUITS FOR OPEN IN HARNESS
• Measure resistance for following HO2S-21 harnesses at harness side connectors:
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- Between HO2S-21 terminal 4 and PCM terminal 87 (R.H.D.) /E-26 (L.H.D.)
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- Between HO2S-21 terminal 3 and PCM terminal 91 (R.H.D.) /E-41 (L.H.D.)
• Is the resistance less than 5.0 ohms?
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Yes
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Go to the next step.
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No
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Repair open circuit, then go to Step 11.
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8
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CHECK HO2S-11 CIRCUIT FOR SHORT TO VPWR IN HARNESS
• Measure resistance between PCM terminal 87 (R.H.D.) /E-26 (L.H.D.) and 71, 97 (R.H.D.) /C-35, C-36 (L.H.D.) at PCM harness connector pin.
• Is the resistance greater than 10,000 ohms?
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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 10.
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9
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CHECK FOR SOURCE OF POTENTIAL HO2S-21 CONTAMINATION
• Investigate the following items as potential sources of HO2S-21 contamination.
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- Use of unapproved silicon sealers.
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- Fuel contaminated by silicon additives.
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- Excessive oil burning. (i.e.: rings, valve seals and oil overfill)
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- Glycol (antifreeze) leaking internally in the engine.
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- Lead contaminated fuel
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- Short drive cycles in cold weather
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- Use of unapproved cleaning agents
• Where any of the above conditions or concerns found during inspection?
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Yes
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Repair for source of contamination.
Replace HO2S-21 and oil filter.
Then go to Step 11.
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No
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Replace the PCM, then go to Step 11.
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10
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VERIFY WIRING IS IN PROPER PIN LOCATION
• Measure resistance between PCM terminal 87 (R.H.D.) /E-26 (L.H.D.) and 91 (R.H.D.) /E-41 (L.H.D.) at PCM harness side connector.
• Is the resistance less than 5.0 ohms?
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Yes
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Replace HO2S-21, then go to the next step.
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No
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Intermittent malfunction exist, go to the next step.
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11
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VERIFY TROUBLESHOOTING OF DTC P0153 COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the PCM memory using the WDS or equivalent.
• Cruise the vehicle at 64 km/h {40 MPH} for at least 5 min.
• Is the PENDING CODE same DTC present?
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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 the next step.
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12
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VERIFY AFTER SERVICE PRECAUTION
• Perform "AFTER SERVICE PRECAUTION".
• 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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