| 1 |
VERIFY IF THERE IS POOR DRIVEABILITY OR EXHAUST GAS RELATED MALFUNCTION
- Are any driveability or exhaust smoke concerns present?
|
Yes |
Go to the applicable symptom troubleshooting.
(See SYMPTOM DIAGNOSTIC INDEX .) |
| No |
Go to the next step. |
| 2 |
INSPECT RELATED PART CONDITION
- Inspect the following:
- Electrical connections
- Vacuum lines
- Is there any malfunction?
|
Yes |
Service if necessary.
|
| No |
Go to the next step. |
| 3 |
VERIFY PCM DTC
|
Yes |
Go to the applicable DTC inspection.
(See DTC TABLE [PCM (SKYACTIV-G 2.0, SKYACTIV-G 2.5)]
.) |
| No |
Go to the next step. |
| 4 |
INSPECT FUEL PRESSURE (HIGH-SIDE)
- Start the engine and warm it up completely.
- Access the FUEL_PRES PID using the M-MDS at idle. (See ON-BOARD DIAGNOSTIC TEST
.)
- Is the FUEL_PRES PID value approx. 3 MPa {31 kgf/cm2
, 435 psi}?
|
Yes |
Go to Step 8. |
| No |
Lower than 3 MPa {31 kgf/cm2
, 435 psi}:
- Inspect the following:
- Fuel leakage at the fuel line and fuel injector
- Fuel pump
- If there is any malfunction:
- Repair or replace the malfunctioning part according to the inspection results.
- If there is no malfunction:
- Go to the next step.
|
| 5 |
DETERMINE IF MALFUNCTION CAUSE IS FUEL PRESSURE SENSOR OR HIGH PRESSURE FUEL PUMP
- Is the vehicle acceleration performance normal?
|
Yes |
Go to the next step. |
| No |
Go to Step 7. |
| 6 |
INSPECT FUEL PRESSURE SENSOR
|
Yes |
Replace the fuel distributor.
(See FUEL INJECTOR REMOVAL/INSTALLATION
.) |
| No |
Go to Step 8. |
| 7 |
INSPECT SPILL VALVE CONTROL SOLENOID VALVE CONTROL CIRCUIT FOR SHORT TO GROUND
- Switch the ignition off.
- Disconnect the high pressure fuel pump and PCM connectors.
- Inspect for continuity between high pressure fuel pump terminal A (wiring harness-side) and body ground.
- Is there continuity?
|
Yes |
Refer to the wiring diagram and verify whether or not there is a common connector between high pressure fuel pump terminal A and PCM terminal 1EE.
If there is a common connector:
- Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.
- Repair or replace the malfunctioning part.
If there is no common connector:
- Repair or replace the wiring harness which has a short to ground.
If the malfunction remains:
|
| No |
Replace the high pressure fuel pump.
(See HIGH PRESSURE FUEL PUMP REMOVAL/INSTALLATION
.) |
| 8 |
INSPECT FUEL PRESSURE (LOW-SIDE)
- Connect the fuel pressure gauge between fuel pump and high pressure fuel pump.
- Measure the low side fuel pressure. (See FUEL LINE PRESSURE INSPECTION
.)
- Is the low side fuel pressure within specification?
Specification:
- 405-485 kPa {4.13-4.94 kgf/cm2
, 58.8-70.3 psi}
|
Yes |
Go to the next step. |
| No |
Inspect the following:
- Fuel line restriction
- Fuel filter clogged
- If there is any malfunction:
- Repair or replace the malfunctioning part according to the inspection results.
- If there is no malfunction:
|
| 9 |
DETERMINE IF MALFUNCTION CAUSE IS CHARCOAL CANISTER OR FUEL TANK VENT SYSTEM
- Inspect the charcoal canister for fuel saturation. (See CHARCOAL CANISTER INSPECTION
.)
- Is there excess amount of liquid fuel present in canister?
|
Yes |
Replace the charcoal canister.
(See CHARCOAL CANISTER REMOVAL/INSTALLATION
.) |
| No |
Inspect the fuel tank vent system.
- If the fuel tank vent system is normal:
- Suggest trying a different brand since sulfur content can vary in different fuels.
- If fuel tank vent system is not normal:
- Repair or replace the malfunctioning part according to the inspection results.
|
| 10 |
Verify the test results.
- If normal, return to the diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX .)
- If the malfunction remains, inspect the related Service Bulletins and/or On-line Repair Information and perform repair or diagnosis.
- If the vehicle is repaired, troubleshooting is completed.
- If the vehicle is not repaired or additional diagnostic information is not available, reprogram the PCM if a later calibration is available. Retest.
|