DTC P0092 Without RPO CTF
Circuit Description
The pressure control (PC) valve is used to adjust supply pump discharge amount so as to adjust common rail pressure. The discharge amount from the supply pump to the common rail is determined by PC valve current timing.
Conditions for Running the DTC
| • | Battery voltage is more than 10 volts. |
| • | The engine is running. |
Conditions for Setting the DTC
Abnormally high driving voltage with the PC valve ON, the pump is in normal mode, and the battery voltage is higher than 10 volts when the ignition is ON.
Action Taken When the DTC Sets
| • | The control module illuminates the malfunction indicator lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails. |
| • | The ECM limits fuel delivery. |
Conditions for Clearing the MIL/DTC
| • | The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail. |
| • | A current DTC, Last Test Failed, clears when the diagnostic runs and passes. |
| • | A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic. |
| • | Clear the MIL and the DTC with a scan tool. |
Diagnostic Aids
Inspect for the following conditions:
| • | Poor connection at the ECM |
| Inspect the harness connectors for backed-out terminals, improper mating, broken locks, improperly formed or damaged terminals, and poor terminal-to-wire connection. |
| • | Damaged harness |
| Inspect the wiring harness for damage, shorts to ground, shorts to battery, and open circuits. If the harness appears to be OK, observe the PC valve display on the scan tool while moving connectors and wiring harnesses related to the PC valve sensor. A change in the PC valve scan tool display will indicate the location of the fault. |
Step | Action | Value | Yes | No |
|---|---|---|---|---|
Schematic Reference: Engine Controls Schematics | ||||
1 | Does the DTC set with the engine running? | -- | Go to Step 2 | Go to Diagnostic Aids |
2 |
Does the resistance measure within the specified range? | 0.9-1.3 ohms | Go to Step 3 | Go to Step 7 |
3 |
Does the voltage measure less than the specified value? | 1 V | Go to Step 5 | Go to Step 4 |
4 | Repair the short to battery voltage on the PC valve control circuit to the ECM on the PC valve harness. Did you complete the repair? | -- | Go to Step 10 | -- |
5 |
Does The DTC reset? | -- | Go to Step 8 | Go to Step 6 |
6 |
Does the voltage measure less than the specified value? | 1 V | Go to Step 10 | Go to Step 9 |
7 | Replace the PC valve assembly. Did you complete the replacement? | -- | Go to Step 10 | -- |
8 | Replace the ECM. Did you complete the replacement? | -- | Go to Step 10 | -- |
9 | Repair/replace the PC valve harness. Did you complete the action? | -- | Go to Step 10 | -- |
10 | Clear all DTCs. Does the DTC reset? | -- | Go to Step 1 | Go to Step 11 |
11 | Operate the vehicle. Do any other DTCs set? | -- | System OK | |
