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Home >> Cadillac >> 2006 >> STS V >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - 4.4L - DTC P0506 To P2544 >> DTC P1182 >> Circuit/System Verification
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Circuit/System Verification

  1. If DTCs P0101, P0102, P0103, P0106, P0107, P0108, P0121, P0641, P0651, P2228, P2229, or P2261 are set, refer to Diagnostic System Check - Vehicle for further information.
  2. Ignition OFF, verify the integrity of the entire supercharger air induction system, inspecting for the air induction system for the following conditions:
    • A restricted or collapsed air intake duct
    • A misaligned or damaged air intake duct
    • A dirty or deteriorating air filter element
    • A dirty or deteriorating air filter element
    • Any objects blocking the air inlet probe of the MAF/IAT sensor
    • Any contamination or debris on the sensing elements in the probe of the MAF/IAT sensor
    • Any water intrusion in the induction system
    • Any vacuum leak downstream of the MAF/IAT sensor
    • An intake manifold leak
    • A BARO sensor that is skewed or stuck
    • A skewed or stuck ECT or IAT sensor-Refer to Temperature Versus Resistance .
    • Any type of restriction in the exhaust system-Refer to Restricted Exhaust .
  3. Inspect the vacuum lines for cracking, loose fit, or for improper routing at the following locations:
    • The SCIAP sensor
    • The MAP sensor
    • The by-pass valve solenoid
    • The by-pass valve actuator
  4. inspect the by-pass valve and cable for any of the following conditions:
    • Sticking in either the open or closed position
    • Binding when opening or closing
    • Incorrectly adjusted cable
    • Any damage
  5. Ignition ON, observe the MAP and SC Inlet Pressure Sensor kPa parameters with a scan tool. Start the engine. The MAP and SC Inlet Pressure Sensor kPa parameters should decrease.
    • If the MAP Sensor kPa parameter does not decrease, refer to DTC P0106 .
  6. Ignition ON, depress the accelerator pedal completely and observe the TP Indicated Angle parameter with a scan tool. The TP Indicated Angle parameter should read 98-100 percent.
  7. Ignition ON, perform a snapshot of the throttle actuator control (TAC) data while performing the following action. Refer to Scan Tool Snapshot Procedure .
    1. Slowly depress the accelerator pedal to WOT position and then slowly release the pedal. Exit from the snapshot and review the data.
    2. Compare the TP Sensor 1 and the TP Sensor 2 parameters, frame by frame. The difference between the parameters should be less than 4 percent.
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