P0106

CIRCUIT DESCRIPTION
The Manifold Absolute Pressure (MAP) sensor responds to pressure changes in the intake manifold. The pressure changes occur based on the engine load. The MAP sensor has the following circuits:
^ A 5-volt reference circuit
^ A low reference circuit
^ A signal circuit

The Powertrain Control Module (PCM) supplies 5 volts to the MAP sensor on the 5-volt reference circuit. The PCM also provides a ground on the low reference circuit. The MAP sensor provides a signal to the PCM on the signal circuit which is relative to the pressure changes in the manifold. The PCM should detect a low signal voltage at a low MAP, such as during an idle or a deceleration. The PCM should detect a high signal voltage at a high MAP, such as the ignition is ON, with the engine OFF, or at a Wide Open Throttle (WOT). Certain vehicle models will also use the MAP sensor in order to determine the Barometric Pressure (BARO). This occurs when the ignition switch is turned ON, with the engine OFF. The BARO reading may also be updated whenever the engine is operated at WOT. The PCM monitors the MAP sensor signal for voltage outside of the normal range.

The PCM calculates a predicted value for the MAP sensor based on throttle position and engine speed. The PCM then compares the predicted value to the actual MAP sensor signal. DTC P0106 will set if the MAP sensor signal is not within the predicted range.

CONDITIONS FOR RUNNING THE DTC
^ DTCs P0101, P0102, P0103, P0107, P0108, P0401, P0404, P0405, P0410, P0440, P0442, P0443, P0446, P1120, P1125, P1220, P1221, P1275, P1276, P1280, P1281, P1285, P1286, P1514, P1515, P1516, P1517, or P1518 are not set.
^ The engine is running.
^ The engine speed is between 400-5,000 RPM.
^ Any change in the engine speed is less than 100 RPM.
^ The Throttle Position (TP) is between 0-100 percent.
^ Any change in the idle air is less than 10 g/s.
^ Any change in the EGR position is less than 20 percent.
^ The A/C compressor clutch is steady.
^ The power steering is stable.
^ The brake switch state does not change.
^ All conditions are stable for 2 seconds.

CONDITIONS FOR SETTING THE DTC
The actual MAP sensor signal is not within the predicted range for 1.5 seconds.

ACTION TAKEN WHEN THE DTC SETS
^ The control module illuminates the Malfunction Indicator Lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails.
^ The control module records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the control module stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the control module records the operating conditions at the time of the failure. The control module writes the operating conditions to the Freeze Frame and updates the Failure Records.

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.
^ A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
^ Use a scan tool in order to clear the MIL and the DTC.

DIAGNOSTIC AIDS
^ Inspect for the following conditions:
- A restriction in the MAP sensor vacuum source
- A missing or damaged MAP sensor seal
- Any disconnected, damaged, or incorrectly routed vacuum hoses
- Any intake manifold vacuum leaks
- Any vacuum leaks at the throttle body
^ If an intermittent condition exists, refer to Intermittent Conditions. Intermittent Conditions

TEST DESCRIPTION

Steps 1-7:

Steps 8-20:

The numbers below refer to the step numbers on the diagnostic table.
2. This step tests the MAP sensors ability to correctly indicate BARO pressure. The value shown for the MAP sensor varies with altitude. 103 kPa is the approximate BARO pressure displayed at or near sea level.
4. This step tests the MAP sensor's ability to respond to an increase in the engine vacuum.
5. This step tests for a proper MAP sensor voltage with an applied vacuum.