DTC P0103-00: MAF Sensor Circuit High Input: Notes
DETECTION CONDITION AND POSSIBLE CAUSE
| DTC P0103:00 |
MAF sensor circuit high input |
| DETECTION CONDITION |
- The PCM monitors the input voltage from the MAF sensor when the engine is running. If the input voltage at the PCM terminal 2BC is above 4.94 V
for 5 s
, the PCM determines that the MAF sensor circuit has a malfunction.
Diagnostic support note
- This is a continuous monitor (CCM).
- The check engine light illuminates if the PCM detects the above malfunction condition during the first drive cycle.
- FREEZE FRAME DATA (Mode 2)/Snapshot data is available.
- The DTC is stored in the PCM memory.
|
| FAIL-SAFE FUNCTION |
- Restricts the upper limit of the engine speed.
- Inhibits the evaporative purge control.
|
| POSSIBLE CAUSE |
- MAF sensor/IAT sensor No.1 connector or terminals malfunction
- PCM connector or terminals malfunction
- MAF sensor malfunction
- Short to power supply in wiring harness between MAF sensor/IAT sensor No.1 terminal C and PCM terminal 2BC
- Open circuit in wiring harness between MAF sensor/IAT sensor No.1 terminal B and PCM terminal 2AY
- PCM malfunction
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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) |
| MAF |
g/sec |
|
| V |
- Switch the ignition to ON (MAF: 0.59 g/s {0.078 lb/min}): approx. 0.72 V
- Idle (after warm up) (MAF: 2.17 g/s {0.287 lb/min}): approx. 0.86 V
- Racing (engine speed is 2,000 rpm) (MAF: 4.73 g/s {0.626 lb/min}): approx. 1.07 V
|