STEP 3. Measure the sensor supply voltage at boost pressure sensor harness side connector.
(1) Disconnect the boost pressure sensor connector and measure at the harness side.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal UATS line and ground.- Voltage should be between 4.5 and 4.9 volts.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Is the measured voltage between 4.5 and 4.9 volts?
Go to Step 5. Go to Step 4.