DTC P050A-00: Cold Start IAC System Performance Problem: Notes
DETECTION CONDITION AND POSSIBLE CAUSE
| DTC P050A:00 |
Cold start IAC system performance problem |
| DETECTION CONDITION |
- The actual idle speed is lower than expected from specified for 9.0 s
when the target idle speed correction value for cold start is above 0 rpm
or ignition retard value is above the following:
Diagnostic support note
- This is a continuous monitor (cold start emission reduction strategy monitoring).
- The check engine light illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM.
- PENDING CODE is available if the PCM detects the above malfunction condition during first drive cycle.
- FREEZE FRAME DATA (Mode 2)/Snapshot data is available.
- The DTC is stored in the PCM memory.
|
| FAIL-SAFE FUNCTION |
- |
| POSSIBLE CAUSE |
- Air suction in intake air system
- Drive-by-wire control system malfunction
- Throttle valve stuck or blockage
- PCM malfunction
|
| SYSTEM WIRING DIAGRAM |
- |
CAUTION:
- Verify the malfunction symptom according to not only the PID value but also the symptom troubleshooting.
RELATED PIDS
| Monitor item (Definition) |
Unit/Condition |
Condition/Specification (Reference) |
| ECT |
°C, °F |
|
| V |
- ECT is 20°C {68°F}: approx. 3.10 V
- ECT is 40°C {104°F}: approx. 2.16 V
- ECT is 60°C {140°F}: approx. 1.40 V
- ECT is 80°C {176°F}: approx. 0.87 V
- ECT is 100°C {212°F}: approx. 0.54 V
|
| IAT |
°C, °F |
|
| V |
- IAT is 20°C {68°F}: approx. 2.64 V
- IAT is 40°C {104°F}: approx. 1.80 V
- IAT is 60°C {140°F}: approx. 1.14 V
|
| RPM |
RPM |
- Displays the engine speed
|
| TP REL |
% |
- Accelerator pedal released: approx. 12 %
- Accelerator pedal depressed: approx. 82 %
|