Diagnostic Test
- CHECK FOR RESTRICTED AIR FILTER
- Turn the ignition off.
- Remove the Air Cleaner Assembly from the Throttle Body.
- Remove and inspect the Air Filter.
Is the Air Filter dirty?
Yes
- Replace the Air Filter.
- Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
No
- Go To 3
- THROTTLE PLATE INSPECTION
- Check for any signs of a foreign material (ice, dirt, or excessive carbon build up) on the Throttle Plate or in the bore causing the Throttle Plate to stick.
Were any signs of foreign material or scoring of the throttle plate or bore found?
Yes
- Remove the debris if possible or replace the Throttle Body Assembly. Disconnect the Battery when replacing the Throttle Body Assembly. After installation is complete, use a scan tool and select the ETC RELEARN function.
- Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
No
- Go To 3
- Check for any signs of a foreign material (ice, dirt, or excessive carbon build up) on the Throttle Plate or in the bore causing the Throttle Plate to stick.
- CHECK FOR CONTAMINATED FUEL
- Inspect the Fuel for contamination. (Dirt, water, or other foreign material)
Is the fuel contaminated?
Yes
- Drain the Fuel from the fuel tank into an approved gas holding tank and add clean fuel. Refer to the appropriate service information .
No
- Go To 4
- Inspect the Fuel for contamination. (Dirt, water, or other foreign material)
- CHECK FOR PROPER ETHANOL LEVEL IN THE GASOLINE
- Perform the CHECKING THE ETHANOL LEVEL IN THE FUEL test procedure. Refer to CHECKING FOR PROPER ETHANOL LEVEL IN THE GASOLINE
.
Is the fuel contaminated?
Yes
- Drain the Fuel from the fuel tank into an approved gas holding tank and add clean fuel. Refer to the appropriate service information .
No
- Go To 5
- Perform the CHECKING THE ETHANOL LEVEL IN THE FUEL test procedure. Refer to CHECKING FOR PROPER ETHANOL LEVEL IN THE GASOLINE
.
- CHECK RELATED PCM AND COMPONENT CONNECTIONS
- Perform any Service Bulletins that apply.
- Disconnect all PCM harness connectors.
- Disconnect all related in-line harness connections (if equipped).
- Disconnect the related component harness connectors.
- Inspect harness connectors, component connectors, and all male and female terminals for the following conditions:
- Proper connector installation.
- Damaged connector locks.
- Corrosion.
- Other signs of water intrusion.
- Weather seal damage (if equipped).
- Bent terminals.
- Overheating due to a poor connection (terminal may be discolored due to excessive current draw).
- Terminals that have been pushed back into the connector cavity.
- Check for spread terminals and verify proper terminal tension.
Repair any conditions that are found.
- Reconnect all PCM harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
- Reconnect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
- Reconnect all related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
- With the scan tool, erase DTCs.
- Test drive or operate the vehicle in accordance with the when monitored and set conditions.
- With the scan tool, read DTCs.
Did the DTC return?
Yes
- Replace the Powertrain Control Module in accordance with the Service information. Refer to MODULE, POWERTRAIN CONTROL (PCM), REMOVAL AND INSTALLATION .
- Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
No
- Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
- Test complete.