DTC P151B-00: IAC System Problem: Notes
DETECTION CONDITION AND POSSIBLE CAUSE
| DTC P151B:00 |
IAC system problem |
| DETECTION CONDITION |
- The PCM cannot control the idle speed toward the target idle speed during the KOER self test.
Diagnostic support note
- The check engine light does not illuminate.
- FREEZE FRAME DATA (Mode 2)/Snapshot data is not available.
- The DTC is stored in the PCM memory.
|
| FAIL-SAFE FUNCTION |
- |
| POSSIBLE CAUSE |
- A/C magnetic clutch malfunction
- Drive-by-wire control system related sensor malfunction
- Purge solenoid valve malfunction
- Air cleaner element restricted
- Throttle body passage blockage
- Engine malfunction
- Insufficient engine compression (over capacity of blow-by gas)
- Poor quality fuel
- Generator malfunction
- 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) |
| ALTF |
% |
- Switch the ignition to ON: 0 %
- Idle: approx. 42 %
- Racing (engine speed is 2,000 rpm): approx. 29 %
|
| ALTT V |
V |
- Idle (no E/L): approx. 14 V
(this is an internal calculation value and differs from the terminal voltage).
|
| TP1 |
V |
- Accelerator pedal released: approx. 1.11 V
- Accelerator pedal depressed: approx. 4.59 V
|
| % |
- Accelerator pedal released: approx. 22 %
- Accelerator pedal depressed: approx. 92 %
|
| TP2 |
V |
- Accelerator pedal released: approx. 3.92 V
- Accelerator pedal depressed: approx. 0.41 V
|
| % |
- Accelerator pedal released: approx. 22 %
- Accelerator pedal depressed: approx. 82 %
|