P0243

CIRCUIT DESCRIPTION
Output driver modules (ODM) are used by the powertrain control module (PCM) to turn ON many of the current-driven devices that are needed to control various engine and transaxle functions. Each ODM is capable of controlling up to 7 separate outputs by applying ground to the device which the PCM is commanding ON. Unlike the quad driver modules (QDM) used in prior model years, ODMs have the capability of diagnosing each output circuit individually.
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 conditions are 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
Inspect for the following conditions:
- A poor connection at the PCM or the boost control solenoid-Inspect the harness connectors for the following conditions:
- Backed out terminals
- Improper mating
- Broken locks
- Improperly formed or damaged terminals
- Poor terminal to wire connection
- The wiring harness for damage

If the harness appears to be OK, disconnect the PCM, turn ON the ignition and observe a voltmeter connected between the boost control solenoid control circuit and ground at the PCM harness connector while moving connectors and wiring harnesses related to the boost control solenoid. A change in voltage will indicate the location of the malfunction.

Reviewing the Failure Records vehicle mileage since the diagnostic test last failed may help determine how often the condition that caused the DTC to be set occurs. This may assist in diagnosing the condition.

TEST DESCRIPTION

Steps 1-4:

Steps 5-7:

Steps 8-12:

Steps 12-16:

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.