Description
ECM controls ignition timing and engine idle speed when engine is started with pre-warming up condition.
This control promotes the activation of three way catalyst by heating the catalyst and reduces emissions.
DTC Logic
DTC DETECTION LOGIC
NOTE:
If DTC P050A, P050B or P050E is displayed with other DTC, first perform the trouble diagnosis for other DTC.
DTC No. | CONSULT screen terms (Trouble diagnosis content) | DTC detecting condition | Possible cause |
P050A | COLD START CONTROL (Cold start idle air control system performance) | ECM does not control engine idle speed properly when engine is started with pre-warming up condition. |
|
P050B | COLD START CONTROL (Cold start ignition timing performance) | ECM does not control ignition timing properly when engine is started with pre-warming up condition. | |
P050E | COLD START CONTROL (Cold start engine exhaust temperature too low) | The temperature of the catalyst inlet does not rise to the proper temperature when the engine is started with pre-warming up condition. |
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 11 V at idle.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE-1
With CONSULT
With GST
Follow the procedure “With CONSULT” above.
Is the value of “COOLANT TEMP/S” between 15°C (59°F) and 36°C (97°F)? YES >> GO TO 3.
NO-1 [If it is below 15°C (59°F)]>>Warm up the engine until the value of “COOLANT TEMP/S” reaches 15°C (59°F) or more. Retry from step 1.
NO-2 [If it is above 36В°C (97В°F)]>>Cool engine down to less than 36В°C (97В°F). Retry from step 1.
3.PERFORM DTC CONFIRMATION PROCEDURE-2
With CONSULT
With GST
Follow the procedure “With CONSULT” above.
Is 1st trip DTC detected? YES >> Proceed to EC-339, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure
1.PERFORM IDLE AIR VOLUME LEARNING
Perform EC-140, "Work Procedure".
Is Idle Air Volume Learning carried out successfully? YES >> GO TO 2.
NO >> Follow the instruction of Idle Air Volume Learning.
2.CHECK INTAKE SYSTEM
Check for the cause of intake air volume lacking. Refer to the following.
Is the inspection result normal? YES >> GO TO 3.
NO >> Repair or replace malfunctioning part
3.CHECK FUEL INJECTION SYSTEM FUNCTION
Perform DTC Confirmation Procedure for DTC P0171. Refer to EC-246, "DTC Logic".
Is the inspection result normal? YES >> GO TO 4.
NO >> Proceed to EC-247, "Diagnosis Procedure" for DTC P0171.
4.PERFORM DTC CONFIRMATION PROCEDURE
See EC-338, "DTC Logic".
Is the 1st trip DTC P050A, P050B or P050E displayed again? YES >> Replace ECM. Refer to EC-485, "Removal and Installation".
NO >> INSPECTION END
A-bag branch line circuit
Diagnosis procedure
Warning:
Always observe the following items for preventing accidental
activation.
Before servicing, turn ignition switch off, disconnect battery
negative terminal, and wait 3 minutes
or more. (To discharge backup capacitor.)
Never use unspecified tester or other me ...
On board refueling vapor recovery(ORVR)
Component Function Check
1.CHECK ORVR FUNCTION
Check whether the following symptoms are present.
Fuel odor from EVAP canister is strong
Cannot refuel/Fuel odor from the fuel filler opening is strong while
refueling.
Are any symptoms present?
YES >> Proceed to EC-468, "Diagn ...
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TENSIONER"
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”,
used along
with a front seat belt, helps to reduce the risk or severity of injury to the
driver and front passenger for certain
types of collision. Information necessary to service the system ...