Step
| Action
| Values
| Yes
| No
|
1
| Were the Preliminary Checks performed?
| --
| Go to
Step 2
| Go to
Symptoms - Engine Controls
|
2
|
- Fill the fuel tank with a known good grade of gasoline that has the octane
rating of 87-89 Octane.
- Reevaluate the vehicle's performance.
Does the detonation problem still exist?
| --
| Go to
Step 3
| System OK
|
3
|
- Inspect for low engine coolant.
- Inspect for restricted air flow to the radiator or restricted coolant
flow.
- Inspect for a faulty thermostat.
- Inspect for an incorrect coolant solution.
Is a repair necessary?
| --
| Go to
Step 4
| Go to
Step 5
|
4
| Repair or replace any cooling system components as needed.
Did you complete the repair?
| --
| System OK
| --
|
5
|
- Measure the voltage using the scan tool.
- Replace the engine coolant temperature (ECT) sensor if the resistance
is not within specifications as listed in DTC P1114.
Did you find and correct the condition?
| --
| Go to
Step 6
| Go to
Step 7
|
6
| Replace the ECT sensor or repair the circuit needed.
Did you complete the repair?
| --
| System OK
| --
|
7
|
- Inspect the ignition system output with a spark tester.
- Inspect the spark plugs for the proper heat range and gap.
- Inspect for the proper operation of the ignition controls.
Is the ignition system operating properly?
| --
| Go to
Step 9
| Go to
Step 8
|
8
| Repair or replace the ignition system components as needed.
Did you complete the repair?
| --
| System OK
| --
|
9
|
- Connect the scan tool to the data link connector (DLC).
- Road test the vehicle at the speed of the complaint.
- Monitor the Long Term Fuel Trim reading from the scanner data stream.
Is the Long Term Fuel Trim display greater than the value specified?
| 25%
| Go to
DTC P0131
| Go to
Step 10
|
10
| Measure the fuel system pressure.
Is the fuel system pressure within the specified range?
| 379-393 kPa (55-57 psi)
| Go to
Step 11
| Go to
Step 12
|
11
| Repair or replace the fuel system components as needed.
Did you complete the repair?
| --
| System OK
| --
|
12
|
- Inspect for carbon buildup inside the engine.
- Remove the carbon with a top engine cleaner. Follow the instructions supplied
with the product.
- Inspect the basic engine parts such as the camshaft, the cylinder head,
the pistons, etc. for excessive wear.
- Replace any excessively worn parts.
Did you find and correct the condition?
| --
| Go to
Step 13
| --
|
13
|
- Inspect the exhaust gas recirculation (EGR) valve for proper operation.
- Inspect the air intake system for proper operation.
- Inspect the torque converter clutch (TCC) operation and transaxle shift
points.
- Inspect the service bulletins for PROM updates.
- Inspect the cylinder compression.
- Repair or replace any faulty components.
Did you find and correct the condition?
| --
| System OK
| --
|
