DTC 0209

ON BOARD DIAGNOSIS LOGIC
With the Air/Fuel Mixture Ratio Self-Learning Control, the actual mixture ratio can be brought closely to the theoretical mixture ratio based on the mixture ratio feedback signal from the front heated oxygen sensors. The ECM calculates the necessary compensation to correct the offset between the actual and the theoretical ratios. In case the amount of the compensation value is extremely large (The actual mixture ratio is too rich.), the ECM judges the condition as the fuel injection system malfunction and light up the MIL (2 trip detection logic).




CONSULT REFERENCE VALUE IN DATA MONITOR MODE
Remarks: Specification data are reference values.

DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE (Overall)
With Consult
(1) Start engine and warm it up sufficiently.
(2) Turn ignition switch "OFF" and wait at least 5 seconds.
(3) Turn ignition switch "ON" and select "SELF-LEARN CONTROL" in "ACTIVE TEST" mode with CONSULT.




(4) Clear the self-learning control coefficient by touching "CLEAR".
(5) Select "DATA MONITOR" mode with CONSULT.
(6) Start engine again and wait at least 10 minutes at idle speed.
The DTC P0175 should be detected at this stage, if a malfunction exists.
(7) If it is difficult to start engine at step 6, the fuel injection system has a malfunction, too.
If engine does not start, remove ignition plugs and check for fouling, etc.

OR

Without Consult




(1) Disconnect mass air flow sensor harness connector.
(2) Start engine and run it at least 3 seconds at idle speed.
(3) Stop engine and reconnect mass air flow sensor harness connector.
(4) Turn ignition switch "ON".
(5) Perform "Diagnostic Test Mode II (Self-diagnostic results)" with ECM. Make sure DTC 0102 is detected.
(6) Erase the DTC 0102 by changing from Diagnostic Test Mode II to Diagnostic Test Mode
(7) Perform "Diagnostic Test Mode II (Self-diagnostic results)" with ECM. Make sure DTC 0505 is detected.
(8) Start engine again and wait at least 10 minutes at idle speed.
The DTC 0209 should be detected at this stage, if a malfunction exists.
(9) If it is difficult to start engine at step 8, the fuel injection system also has a malfunction.
If engine does not start, remove ignition plugs and check for fouling, etc.

EC-FUELLH-01 Fuel Injection System Function (Left Bank) (Rich Side) (DTC: P0175):

WIRING DIAGRAM







DIAGNOSTIC PROCEDURE