|
*: Preparation to carry out troubleshooting
Store the freeze frame data of the diagnosis code P0171.
|
|
Q.
Is any other diagnosis code than P0171 stored?
|
|
Inspection Chart for Diagnosis Code
|
|
|
|
- Refer to Data List Reference Table
.
- Item No. 6: Intake air temperature sensor
- Item No. 7: Manifold absolute pressure sensor
- Item No. 8: Engine coolant temperature sensor
|
|
Q.
Are the check results normal?
|
|
Perform the diagnosis code classified check procedure for the sensor that has
shown an abnormal data value (Refer to Inspection Chart for Diagnosis Code ).
|
|
|
|
Q.
Is the check result normal?
|
|
Q.
Is the check result normal?
|
|
Q.
Is the check result normal?
|
|
Q.
Is the check result normal?
|
|
Repair the connector(s) or wiring harness.
|
|
|
|
- Check valve operation check (Refer to GROUP 35A - Basic Brake
System - On-Vehicle Service
).
|
|
Q.
Is the check result normal?
|
|
- Check purge control solenoid valve itself (Refer to GROUP 17 - Emission
Control System - Evaporative Emission Control System - Purge Control Solenoid
Valve Check
).
|
|
Q.
Is the check result normal?
|
|
Replace the purge control solenoid valve.
|
|
|
|
- Measure fuel pressure (Refer to Fuel Pressure Test
).
|
|
Q.
Is the check result normal?
|
|
Repair the fuel pressure.
|
|
|
|
Q.
Is the check result normal?
|
|
Repair the connector(s) or wiring harness.
|
|
|
|
Q.
Is the check result normal?
|
|
Repair the connector(s) or wiring harness.
|
|
|
|
- Check injector itself (Refer to
).
|
|
Q.
Is the check result normal?
|
|
- Check whether foreign materials enter into fuel such
as water, diesel fuel, water removers and additives.
|
|
Q.
Is the check result normal?
|
|
- Refer to Data List Reference Table
.
- Item No. 11: Oxygen sensor
|
|
Q.
Is the check result normal?
|
|
Replace the oxygen sensor.
|
|
|
|
- If diagnosis code P0171 is stored while the vehicle is idling, let the vehicle
idle for more than 20 minutes.
- If diagnosis code P0171 is stored while the vehicle is running, let the vehicle
run with the same conditions of the freeze frame data, such as the vehicle speed, the crank angle
sensor and the coolant temperature sensor, for more than 10 minutes.
|
|
Q.
Is diagnosis code P0171 stored?
|
|
After replacing the oxygen sensor (front), go to Step 16.
|
|
|
|
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection
Service Points - How to Cope with Intermittent Malfunction ).
|
|
|
|
- If diagnosis code P0171 is stored while the vehicle is idling, let the vehicle
idle for more than 20 minutes.
- If diagnosis code P0171 is stored while the vehicle is running, let the vehicle
run with the same conditions of the freeze frame data, such as the vehicle speed, the crank angle
sensor and the coolant temperature sensor, for more than 10 minutes.
|
|
Q.
Is diagnosis code P0171 stored?
|