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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
|
Record FREEZE FRAME DATA on the repair order, then go to the next step.
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2
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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
|
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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3
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PERFORM KOER SELF-TEST
• Verify that the engine is at normal operating temperature.
• Perform the KOER self-test.
• Are DTCs P0040, P0041 or P1127 present?
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Yes
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Go to the appropriate DTC troubleshooting.
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No
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Go to the next step.
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4
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INSPECT FOR UNMETERED AIR LEAKS
-
Note
-
• Fuel calculations can be affected by unmetered air leaks.
• Carefully inspect the following areas for potential air leaks:
-
― Hoses connecting to the MAF sensor assembly
― Hoses connecting to the throttle body
― Intake manifold gasket leaks
― PCV system
― The vacuum lines are disconnected
― Improperly seated engine oil dipstick, tube or oil filler cap
― Exhaust leaks at flanges and gaskets
• Are any air leaks present?
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Yes
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Repair the source of the air leak. Then go to Step 17.
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No
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Go to the next step.
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5
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INSPECT HO2S CIRCUIT (S) FOR OPEN CIRCUIT IN WIRING HARNESS
• Turn the ignition switch off.
• Remove the jumper wire (s).
• Visually inspect the HO2S wiring harness for exposed wiring, water contamination, corrosion, and proper assembly.
• Disconnect the PCM connector.
• Measure the resistance between the following terminals:
-
― PCM terminal 2Y (wiring harness-side) and front HO2S (RH) terminal B (wiring harness-side)
― PCM terminal 2BG (wiring harness-side) and rear HO2S (RH) terminal B (wiring harness-side)
― PCM terminal 2U (wiring harness-side) and front HO2S (LH) terminal B (wiring harness-side)
― PCM terminal 2BC (wiring harness-side) and rear HO2S (LH) terminal B (wiring harness-side)
― PCM terminal 2AL (wiring harness-side) and HO2S terminal D (wiring harness-side)
• Are the resistances less than 5 ohms?
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Yes
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Go to the next step.
|
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No
|
Repair or replace suspected part. Then go to Step 17.
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6
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INSPECT HO2S CIRCUIT FOR SHORT TO POWER SUPPLY
• PCM connector disconnected.
• Measure the resistance between the following terminals:
-
― PCM terminal 1BJ (wiring harness-side) and PCM terminal 2Y (wiring harness-side)
― PCM terminal 1BJ (wiring harness-side) and PCM terminal 2BG (wiring harness-side)
― PCM terminal 1BJ (wiring harness-side) and PCM terminal 2U (wiring harness-side)
― PCM terminal 1BJ (wiring harness-side) and PCM terminal 2BC (wiring harness-side)
• Is the resistance more than 10 kilohms?
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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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7
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INSPECT FOR SOURCE OF POTENTIAL HO2S CONTAMINATION
• Investigate the following items as potential sources of HO2S contamination:
-
― Use of unapproved silicon sealers
― Fuel contaminated by silicon additives
― Excessive oil consumption
― Glycol leaking internally in the engine
― Lead-contaminated fuel
― Short drive cycles in cold weather
― Use of unapproved cleaning agents
• Is a concern present?
|
Yes
|
Repair the source of the contamination. Change the engine oil and oil filter. Then go to Step 17.
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No
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Go to the next step.
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8
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VISUALLY INSPECT HO2S WIRING HARNESS
• Connect the PCM connector.
• Visually inspect the HO2S wiring harness for exposed wiring water contamination, corrosion, and proper assembly.
• Is a concern present?
|
Yes
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Repair if necessary. Then go to the next step.
|
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No
|
Go to the next step.
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9
|
INSPECT HO2S AND SIGRTN CIRCUITS FOR OPEN CIRCUIT IN WIRING HARNESS
-
Note
-
• Verify the wiring harness terminals are in the proper location.
• Measure the resistance between the following terminals:
-
― PCM terminal 2Y (wiring harness-side) and front HO2S (RH) terminal B (wiring harness-side)
― PCM terminal 2BG (wiring harness-side) and rear HO2S (RH) terminal B (wiring harness-side)
― PCM terminal 2U (wiring harness-side) and front HO2S (LH) terminal B (wiring harness-side)
― PCM terminal 2BC (wiring harness-side) and rear HO2S (LH) terminal B (wiring harness-side)
― PCM terminal 2AL (wiring harness-side) and HO2S terminal D (wiring harness-side)
• Are the resistances less than 5 ohms?
|
Yes
|
Go to the next step.
|
|
No
|
Repair or replace suspected part. Then go to Step 17.
|
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10
|
INSPECT HO2S CONTROL CIRCUIT IN WIRING HARNESS
• Turn the ignition switch off.
• Disconnect the HO2S connector.
• Perform the KOEO self-test.
• Measure the voltage between: HO2S connector terminal C and D on the wiring harness side.
• Is the voltage more than 10 V?
|
Yes
|
Go to the next step.
|
|
No
|
Repair or replace suspected part. Then go to the next step.
|
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11
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INSPECT HO2S HEATER FOR SHORT IN WIRING HARNESS
• Turn the ignition switch off.
• Disconnect the HO2S connector.
• Disconnect the PCM connector.
• Measure the resistance between the following terminals:
-
― HO2S terminal A (wiring harness-side) and battery negative terminal
― HO2S terminal A (wiring harness-side) and HO2S terminal C (wiring harness-side)
― HO2S terminal A (wiring harness-side) and HO2S terminal D (wiring harness-side)
― HO2S terminal A (wiring harness-side) and HO2S terminal B (wiring harness-side)
• Are the resistances more than 10kilohms?
|
Yes
|
Go to the next step.
|
|
No
|
Repair or replace suspected part. Then go to Step 17.
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12
|
INSPECT HO2S HEATER CIRCUIT FOR OPEN CIRCUIT IN WIRING HARNESS
• Measure the resistance:
-
― For DTC P0133 measure resistance between PCM terminal 2J and front HO2S (RH) terminal A
― For DTC P0139 measure resistance between PCM terminal 2AS and rear HO2S (RH) terminal A
― For DTC P0153 measure resistance between PCM terminal 2E and front HO2S (LH) terminal A
― For DTC P0159 measure resistance between PCM terminal 2AO and rear HO2S (LH) terminal A
• Is the resistance less than 5 ohms?
|
Yes
|
Go to the next step.
|
|
No
|
Repair or replace suspected part. Then go to the next step.
|
|
13
|
INSPECT INTERNAL RESISTANCE OF HO2S HEATER
• Measure the resistance between the suspect HO2S terminal A and C at component side.
• Is the resistance between 3—30 ohms?
|
Yes
|
Go to the next step.
|
|
No
|
Install a new HO2S. Then go to Step 17.
|
|
14
|
INSPECT HO2S HEATER CIRCUIT FOR INTERNAL SHORT TO SIGRTN OR GROUND
• Measure the resistance between:
-
― HO2S terminal A and D at component side
― HO2S terminal A at component side and battery negative terminal
• Is the resistance more than 10 kilohms?
|
Yes
|
Go to the next step.
|
|
No
|
Replace the HO2S.
Then go to Step 17.
|
|
15
|
INSPECT HO2S
• For DTC P0133 Inspect the front HO2S(RH)
• For DTC P0139 Inspect the rear HO2S(RH)
• For DTC P0153 Inspect the front HO2S(LH)
• For DTC P0159 Inspect the rear HO2S(LH)
• Is there any malfunction?
|
Yes
|
Replace the HO2S.
Then go to Step 17.
|
|
No
|
Go to the next step.
|
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16
|
INSPECT FOR CORRECT PCM OPERATION
• Disconnect all the PCM connectors.
• Visually inspect for:
-
― Pushed out pins
― Corrosion
• Connect all the PCM connectors and verify that they seat correctly.
• Retrieve DTCs using the M-MDS.
• Is the PENDING CODE for this DTC present?
|
Yes
|
Go to the next step.
|
|
No
|
The system is correctly. Go to the next step.
|
|
17
|
VERIFY TROUBLESHOOTING OF DTC P0133, P0139, P0153 or P0159 HAS BEEN COMPLETED
• Verify that all disconnected connectors are reconnected.
• Turn the ignition switch to the ON position (Engine off).
• Clear the DTC from the PCM memory using the M-MDS.
• Retrieve DTCs using the M-MDS.
• Is the PENDING CODE for this DTC present?
|
Yes
|
Replace PCM, then go to the next step.
|
|
No
|
Go to the next step.
|
|
18
|
VERIFY AFTER REPAIR PROCEDURE
• Perform “AFTER REPAIR PROCEDURE”.
• Are any DTC present?
|
Yes
|
Go to the applicable DTC inspection.
|
|
No
|
Troubleshooting completed.
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