Circuit Description
The common rail is located on the intake manifold. The common rail is equipped with a flow damper, a pressure limiter, and a common rail pressure (PC) sensor.
The common rail unit has a common fuel passage, fuel passage holes, and installing threaded holes. The common fuel passage is a through hole made in the common rail unit. The PC sensor is installed at the left end of the unit.
Conditions for Setting the DTC
| • | The engine is running. |
| • | DTC P0192 or P0193 is not set. |
| • | PC sensor indicates a variation of more than 10 MPa (1,450 psi) from target rail pressure. |
Action Taken When the DTC Sets
| • | The control module illuminates the malfunction indicator lamp (MIL) when 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. |
| • | Clear the MIL and the DTC with a scan tool. |
Step | Action | Value | Yes | No | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
Schematic Reference: Engine Controls Schematics | ||||||||||
1 | Does the DTC set while the engine is running or when the ignition is ON? | -- | Go to Step 2 | Go to Intermittent Conditions | ||||||
2 |
Important: The fuel pressure 25 MPa (3,626 psi) and the voltage about 1.56 volts at idling Does each voltage measure within the specified range? | 0.9-1.1 V | Go to Step 3 | Go to Step 4 | ||||||
3 |
Does each voltage measure near the specified value? | 1.56 V | Go to Step 5 | Go to Step 4 | ||||||
4 |
Does each resistance measure less than the specified value? | 2 ohms | Go to Step 10 | Go to Step 12 | ||||||
5 |
Measure voltage while the engine is idling and varying the engine RPM using the accelerator pedal. Does the voltage vary? | -- | Go to Step 14 | Go to Step 6 | ||||||
6 |
Does each resistance measure less than the specified value? | 2 ohms | Go to Step 7 | Go to Step 14 | ||||||
7 | Measure the resistance between pin number C4-8 and C4-19 at the ECM connector and a good ground. Does the resistance measure more than the specified value? | 10 M ohms | Go to Step 8 | Go to Step 12 | ||||||
8 |
Does the DTC reset? | -- | Go to Step 9 | Go to Step 13 | ||||||
9 | Start the engine and accelerate a few times. Does the DTC reset? | -- | Go to Step 11 | Go to Step 15 | ||||||
10 | Replace the PC sensor. Did you complete the replacement? | -- | Go to Step 14 | -- | ||||||
11 | Replace the ECM. Did you complete the replacement? | -- | Go to Step 14 | -- | ||||||
12 | Repair/replace the PC sensor wiring harness. Did you complete the action? | -- | Go to Step 14 | -- | ||||||
13 | Repair the poor connection at the harness connector. Did you complete the repair? | -- | Go to Step 14 | -- | ||||||
14 | Clear the DTCs Does the DTC reset? | -- | Go to Step 1 | Go to Step 15 | ||||||
15 | Operate the vehicle. Do any other DTCs set? | -- | System OK | |||||||
