P0243

DTC P0243

CIRCUIT DESCRIPTION
The supercharger boost pressure is monitored and regulated under various engine operating conditions. The powertrain control module (PCM) controls the boost pressure using and output driver module (ODM) and the supercharger boost control solenoid. The supercharger boost control solenoid is connected inline with a vacuum hose, which when commanded, allows boosted air pressure to flow to the bypass valve actuator opening the bypass valve and reducing supercharger boost pressure. Power to the solenoid is supplied through a fuse. The ground circuit is controlled through the 0DM. The PCM is capable of monitoring the voltage level on an 0DM circuit. If the PCM detects an improper voltage level on the supercharger boost control solenoid control circuit, DTC P0243 sets.

CONDITIONS FOR RUNNING THE DTC
The ignition is ON.

CONDITIONS FOR SETTING THE DTC
- An improper voltage level has been detected on the boost control solenoid control circuit.
- The above condition is present for at least 30 seconds.

ACTION TAKEN WHEN THE DTC SETS
- The control module stores the DTC information into memory when the diagnostic runs and fails.
- The malfunction indicator lamp (MIL) will not illuminate.
- The control module records the operating conditions at the time the diagnostic fails. The control module stores this information in the Failure Records.
- The driver information center, if equipped, may display a message.

CONDITIONS FOR CLEARING THE DTC
- 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 non-emission related diagnostic.
- Clear the DTC with a scan tool.

DIAGNOSTIC AIDS
- For further system diagnosis, refer to Boost Control System Diagnosis. Component Tests and General Diagnostics
- If the condition is intermittent, refer to Intermittent Conditions. Diagnostic Strategies

TEST DESCRIPTION

Steps 1-6:

Steps 7-16:

The numbers below refer to the step numbers on the diagnostic table.
3. This test can detect a partially shorted coil which would cause excessive current flow. Leaving the circuit energized for 2 minutes allows the coil to warm up. When warm, the coil may open, and the amps drops to 0 or the coil may short, and the amps go above 800 mA.
4. This step tests for a short to voltage on the control circuit.