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
Removal and installation
Ipdm e/r
Exploded view
Ipdm e/r
IPDM E/R cover A
Ipdm e/r cover b
Removal and installation
Caution:
Ipdm e/r integrated relays are not serviceable and must not be removed
from unit.
Removal
Remove inlet air duct (upper). Refer to em-25, "removal and
installation" ...
Removal and installation
Av control unit
Exploded view
AV control unit
Av control unit bracket (lh)
AV control unit bracket (RH)
Removal and installation
Removal
Caution:
Remove battery terminal and av control unit after a lapse of 30
seconds or more after turning the
ignition switch off.
Before ...
Installing top tether strap
WARNINGChild restraint anchorages are designed
to withstand only those loads imposed by
correctly fitted child restraints. Under no
circumstances are they to be used to attach
adult seat belts, or other items or
equipment to the vehicle. Doing so could
damage the child r ...