Diagnostic Procedure
DIAGNOSTIC PROCEDURE - O2 SENSOR SLOW RESPONSE
| TEST | ACTION | APPLICABILITY |
|---|---|---|
| 1 |
NOTE:
Check for contaminants that may have damaged the O2 Sensor: contaminated fuel, unapproved silicone, oil and coolant. Turn the ignition on.With the DRBIII®, read DTCs.Does the Good Trip Indicator display NO?Yes --> Go To 2No --> Go To 6 |
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| 2 | Start the engine. Inspect the exhaust system for leaks between the engine and the O2 sensors. Are there any exhaust leaks? Yes --> Repair or replace the leaking exhaust parts as necessary. Perform POWERTRAIN VERIFICATION TEST VER - 5 - 1.6L . No --> Go To 3 |
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| 3 |
NOTE:
Ensure the voltmeter leads meet the terminals in the connector and that there is good terminal to wire connection.
NOTE:
Ensure the voltmeter leads are connected for positive polarity Perform a voltage drop test by backprobing the O2 Sensor Signal circuit at the O2 Sensor harness connector and at the PCM harness connector.Start the engine.Allow the engine to idle.Is the voltage below 0.10 volt?Yes --> Go To 4No --> Repair the high resistance on the O2 Sensor Signal circuit.Perform POWERTRAIN VERIFICATION TEST VER - 5 - 1.6L
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| 4 |
NOTE:
Ensure the voltmeter leads meet the terminals in the connector and that there is good terminal to wire connection.
NOTE:
Ensure the voltmeter leads are connected for positive polarity Backprobe the O2 Sensor ground circuit between the O2 Sensor harness connector and PCM harness connector.Start the engine.Allow the engine to idle.Is the voltage below 0.10 volt?Yes --> Go To 5No --> Repair the high resistance on the O2 Sensor ground circuit.Perform POWERTRAIN VERIFICATION TEST VER - 5 - 1.6L
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| 5 | If there are no possible causes remaining, view repair. Repair Replace the O2 Sensor Perform POWERTRAIN VERIFICATION TEST VER - 5 - 1.6L . |
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| 6 |
NOTE:
Check for contaminants that may have damaged the O2 Sensor: contaminated fuel, unapproved silicone, oil and coolant.
WARNING:
WHEN THE ENGINE IS OPERATING, DO NOT STAND IN A DIRECT LINE WITH THE FAN. DO NOT PUT YOUR HANDS NEAR THE PULLEYS, BELTS OR FAN. DO NOT WEAR LOOSE CLOTHING.
NOTE:
The conditions that set the DTC are not present at this time. The following list may help in identifying the intermittent condition. With the engine running at normal operating temperature, monitor the DRBIII® parameters related to the DTC while wiggling the wiring harness. Look for parameter values to change and/or a DTC to set.Review the DRBIII® Freeze Frame information. If possible, try to duplicate the conditions under which the DTC was set.Refer to any Technical Service Bulletins (TSB) that may apply.Visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or partially broken wires.Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or corroded terminals.Were any of the above conditions present?Yes --> Repair as necessaryPerform POWERTRAIN VERIFICATION TEST VER - 5 - 1.6L
.No --> Test Complete. |
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