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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 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 the next step.
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3
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INDETIFY TRIGGER DTC FOR FEEZE FRAME DATA
• Is DTC P1158 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 FREEZE FRAME DATA DTC inspection.
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4
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VISUALLY INSPECT FOR HO2S-22
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Note
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• Refer to the PCM connector pin number in the beginning of this pinpoint test.
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• If necessary to address all Continuous Memory Ignition and Misfire DTCs, if received during Continuous Memory testing, before addressing any KOER HO2S-22
• Visually inspect for HO2S-22 followings:
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- Pinched, shorted and corroded wiring and pins
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- Crossed sensor wires
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- Exhaust leakage
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- Contaminated or damaged sensor
• Were any concerns found during inspection?
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Yes
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Repair or replace for malfunctioning part, then go to Step 12.
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No
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Go to the next step.
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5
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CHECK EXHAUST SYSTEM FOR LEAKS
• Place vehicle on a host, transaxle in P position, parking brake applied, raise vehicle.
• Inspect the following:
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- Exhaust flanges for leaks
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- HO2S-22 tightening torque
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- Check for punctures and cracks in catalyst and pipes leading to them.
• Is an exhaust leak present?
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Yes
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Repair or replace malfunctioning part, then go to Step 12.
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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-22 HARNESS CIRCUIT FOR SHORT TO VPWR AND GROND
• Disconnect PCM and HO2S-22.
• Measure the resistance between following terminals at PCM harness side connector.
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- Between terminal 61 (R.H.D.) /T-25 (L.H.D.) and 90 (R.H.D.) /E-40 (L.H.D.)
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- Between terminal 61 (R.H.D.) /T-25 (L.H.D.) and 71, 97 (R.H.D.) /C-35, C-36 (L.H.D.)
• 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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Repair for short circuit, then go to Step 12.
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7
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CHECK HO2S-22 SIGNAL CIRCUIT AND HO2S-22 SIGNAL RETURN CIRCUITS FOR OPEN IN HARNESS
• Measure resistance following at harness side connector.
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- Between HO2S-22 terminal 1 and PCM terminal 71, 97 (R.H.D.) /C-35, C-36 (L.H.D.)
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- Between HO2S-22 terminal 4 and PCM terminal 61(R.H.D.) /T-25 (L.H.D.)
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- Between HO2S-12 terminal 3 and PCM terminal 91 (R.H.D.) /T-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 for open circuit, then go to Step 12.
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8
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CHECK HO2S-22 CIRCUIT VOLTAGE
• Connect PCM and HO2S-22.
• Connect the WDS or equivalent to DLC.
• Turn the ignition switch to ON.
• Access O2S22 PID.
• Is the voltage greater than 1.5 V?
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Yes
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Go to Step 11.
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No
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Go to the next step.
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9
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CHECK HO2S-22 GND CIRCUIT IN PCM
• Disconnect PCM.
• Measure the resistance between terminal 91 (R.H.D.) /T-41 (L.H.D.) and 24, 51, 76, 103 (R.H.D.) /C-48, C-49 (L.H.D.) at PCM connector.
• 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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Replace PCM, then go to Step 12.
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10
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HO2S-22 CIRCUIT CHECK
• Connect PCM.
• HO2S-22 disconnected.
• Jumper terminal 1 and 4 at HO2S-22 harness side connector.
• Turn the ignition switch to ON.
• Access O2S22 PID.
• Is the O2S22 PID value greater than 1.5 V?
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Yes
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Replace HO2S-22, then go to Step 12.
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No
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Replace PCM, then go to Step 12.
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11
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CHECK FOR OVER VOLTAGE ON HO2S-12 CIRCUIT IN PCM
• Turn the ignition switch to ON.
• HO2S-22 disconnected.
• Measure voltage for following:
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- Between terminal 3 at HO2S-22 harness side connector and battery negative post.
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- Between terminal 4 at HO2S-22 harness side connector and battery negative post.
• Is the voltage greater than 1.5 V?
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Yes
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Replace PCM, then go to the next step.
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No
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Replace HO2S-22, then go to the next step.
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12
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VERIFY TROUBLESHOOTING OF DTC P1158 COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the PCM memory using the WDS or equivalent.
• Perform KOER self test.
• 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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13
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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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