Step
| Action
| Values
| Yes
| No
|
1
|
- Test fuel composition using the J 44175
Fuel Composition Tester and the Instruction Manual.
- Record the frequency from the special tool test.
- Compare the special tool test frequency and the Fuel Comp. Sensor Frequency
parameter on the scan tool.
Is the difference between the two frequencies less than the specified value?
| 12 Hz
| Go to
Step 2
| Go to
Step 3
|
2
|
- Clean the fuel system. Refer to
Fuel System Cleaning
.
- Replace the fuel filter. Refer to
Fuel Filter Replacement
.
Did you complete the actions?
| --
| Go to
Step 4
| --
|
3
| Replace the FCS. Refer to
Fuel Composition Sensor Replacement
.
Did you complete the replacement?
| --
| Go to
Step 4
| --
|
4
|
- Reassemble the vehicle as necessary.
- Clear any DTCs with a scan tool.
- Start the engine.
- Operate the vehicle in order to verify the repair.
Did you correct the condition?
| --
| System OK
| Go to
Step 5
|
5
| Observe the DTC Info with a scan tool.
Are there any DTCs that have not been diagnosed?
| --
| Go to
Diagnostic Trouble Code (DTC) List
| System OK
|
