P050A

P050A, P050E COLD START CONTROL

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 CONFIRMATION PROCEDURE


1. PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.
1.Turn ignition switch OFF and wait at least 10 seconds.
2.Turn ignition switch ON.
3.Turn ignition switch OFF and wait at least 10 seconds.

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-I

With CONSULT
1.Turn ignition switch OFF and wait at least 10 seconds.
2.Turn ignition switch ON.
3.Select "DATA MONITOR" mode of "ENGINE" using CONSULT.
4.Check the indication of "COOLAN TEMP/S".
With GST
Follow the procedure "With CONSULT" above.
Is the value of "COOLAN TEMP/S" between 4�C (39�F) and 36�C (97�F)?
YES- GO TO 3.
NO-1 [If it is below 4�C (39�F)]-Warm up the engine until the value of "COOLAN TEMP/S" reaches 4�C
(39�F) or more. Retry from step 1.
NO-2 [If it is above 36�C (97�F)]-Cool engine down to less than 36�C (97�F). Retry from step 1.

3. PERFORM DTC CONFIRMATION PROCEDURE-II

With CONSULT
1.Set the select lever in N range.
2.Start the engine and warm up in idle with the value of "COOLAN TEMP/S" between 5�C (41�F) and 40�C
(104�F) for more than 15 seconds.
3.Check 1st trip DTC.
With GST
Follow the procedure "With CONSULT" above.
Is 1st trip DTC detected?
YES- Proceed to .
NO- INSPECTION END


Diagnosis Procedure


1. PERFORM IDLE AIR VOLUME LEARNING

Perform 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.
- Crushed intake air passage
- Intake air passage clogging
- Clogging of throttle body
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. P0171.
Is the inspection result normal?
YES- GO TO 4.
NO- Proceed to P0171 for DTC P0171.

4. PERFORM DTC CONFIRMATION PROCEDURE

1.Turn ignition switch ON.
2.Erase DTC.
3.Perform DTC Confirmation Procedure.
See .
Is the 1st trip DTC P050A or P050E displayed again?
YES- Replace ECM. Service and Repair, NO- INSPECTION END