DTC P0091-00; Fuel Pressure Regulator Control Circuit Low Input: Notes
DETECTION CONDITION AND POSSIBLE CAUSE
| DTC P0091:00 |
Fuel pressure regulator control circuit low input |
| DETECTION CONDITION |
- When the PCM turns the spill valve control solenoid valve off but the spill valve control solenoid valve control circuit voltage is low for 5 s, the PCM determines that the spill valve control solenoid valve control circuit has a malfunction.
MONITORING CONDITIONS
- The following conditions are met:
- Engine speed: 5, 700 rpm or less
- Battery voltage: 10.5 V or more
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.
- DTC is stored in the PCM memory.
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| FAIL-SAFE FUNCTION |
- Stops high pressure fuel pump control
- Limits intake air amount
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| POSSIBLE CAUSE |
- High pressure fuel pump connector or terminals malfunction
- PCM connector or terminals malfunction
- Short to ground in wiring harness between high pressure fuel pump terminal B and PCM terminal 1EF
- Open circuit in wiring harness between the following terminals:
- High pressure fuel pump terminal A-PCM terminal 1EE
- High pressure fuel pump terminal B-PCM terminal 1EF
- Spill valve control solenoid valve (built-into high pressure fuel pump) malfunction
- 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
PID VALUE SPECIFICATIONS
| Item (definition) |
Unit/Condition |
Definition |
Condition/Specification (Reference) |
| FUEL_PRES |
KPa {MPA}, mBar {BAR}, psi, in H20 |
Fuel pressure |
|
| V |
- Fuel pressure is 3.0 MPa {31 kgf/cm 2
, 435 psi}: Approx. 0.92 V
- Fuel pressure is 4.8 MPa {49 kgf/cm 2
, 696 psi}: Approx. 1.17 V
|
| LOAD |
% |
Engine load |
- Idle (after warm up): Approx. 17.64%
- Racing (engine speed is 2, 000 rpm): Approx. 14.51%
- Racing (engine speed is 4, 000 rpm): Approx. 21.17%
|
| RPM |
RPM |
Engine speed |
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