DTC P0201, P0202, P0203, P0204, P0205, or P0206 Without RPO CTF
Circuit Description
A hydraulic piston and a two-way valve (TWV) solenoid valve has been added to the conventional nozzle. When receiving signals from the engine control module (ECM), the TWV opens and closes to change the pressure in the pressure adjustment chamber on top of the hydraulic piston in order for the hydraulic piston to inject the fuel from the nozzle. If the TWV coil circuit is open, DTC P0201-P0206 will set, depending on which cylinder has the fault.
Conditions for Running the DTC
| • | Battery voltage is more than 10 volts. |
| • | The ignition is ON. |
Conditions for Setting the DTC
The TWV coil circuit is open.
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. |
Diagnostic Aids
Inspect for the following conditions:
| • | Poor connections 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 connections. |
| • | Erratic engine RPM |
| • | Lack of engine power |
Step | Action | Values | Yes | No |
|---|---|---|---|---|
Schematic Reference: Engine Controls Schematics | ||||
1 | Is DTC P0201, P0202, P0203, P0204, P0205, or P0206 set with the ignition ON, or with the engine operating? | -- | 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 6 | Go to Step 3 |
3 |
Does each resistance measure below the specified value? | 0.1 ohms | Go to Step 4 | Go to Step 7 |
4 | Measure the resistance at the TWV connector between pin number 1, 2 and 3, 4 at connector 1 for TWV. Does the resistance measure within the specified range? | 0.4-0.8 ohms | Go to Step 6 | Go to Step 5 |
5 |
Did you find and correct the condition? | -- | Go to Step 6 | Go to Step 8 |
6 |
Did the DTC set? | -- | Go to Step 7 | Go to Step 10 |
7 | Repair the open TWV circuit. Did you complete the repair? | -- | Go to Step 10 | -- |
8 | Replace the appropriate TWV. Did you complete the replacement? | -- | Go to Step 10 | -- |
9 | Replace the ECM. Did you complete the replacement? | -- | Go to Step 10 | -- |
10 |
Did the DTC set? | -- | Go to Step 1 | Go to Step 11 |
11 | Operate the vehicle. Do any other DTCs set? | -- | System OK | |
