DTC P0628; Pcm Fuel Pump Control Module Circuit Low Input: Notes
WARNING: This page is about a different car, the 2017 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.
DETECTION CONDITION & POSSIBLE CAUSE
| DTC P0628:00 |
Fuel pump control module circuit low input |
| DETECTION CONDITION |
- When the PCM outputs a duty signal to the fuel pump control module, the difference in voltage between fuel pump unit terminals A and B is less than 1.5 V for a continuous 5 s.
Diagnostic support note
- This is a continuous monitor (CCM).
- The check engine light does not illuminate.
- FREEZE FRAME DATA (Mode 2) is not available.
- Snapshot data is available.
- DTC is stored in the PCM memory.
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| FAIL-SAFE FUNCTION |
Not applicable |
| POSSIBLE CAUSE |
- Fuel pump unit connector or terminals malfunction
- Fuel pump unit malfunction
- Fuel pump control module connector or terminals malfunction
- Short to ground in wiring harness between fuel pump unit terminal A and fuel pump control module terminal 2C
- Open circuit in wiring harness between the following terminals:
- Fuel pump unit terminal A-Fuel pump control module terminal 2C
- Fuel pump unit terminal B-Fuel pump control module terminal 2D
- Fuel pump control module malfunction
- PCM malfunction
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