P0106
DTC P0106CIRCUIT 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 MAP sensor signal circuit
The engine control module (ECM) supplies 5 volts to the MAP sensor on the 5-volt reference circuit. The ECM, also, provides a ground on the low reference circuit. The MAP sensor provides a signal to the ECM on the MAP sensor signal circuit which is relative to the pressure changes in the manifold. The ECM should detect a low signal voltage at a low MAP, such as during an idle or a deceleration. The ECM 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). The MAP sensor is also used 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 ECM monitors the MAP sensor signal for voltage outside of the normal range.
The ECM calculates a predicted value for the MAP sensor based on throttle position (TP) and engine speed. The ECM then compares the predicted value to the actual MAP sensor signal. If the ECM detects that the MAP sensor signal is not within the predicted range, DTC P0106 sets.
CONDITIONS FOR RUNNING THE DTC
- DTC P0068, P0107, P0108, P0117, P0118, P0120, P0122, P0123, P0125, P0128, P0130, P0131, P0132, P0133, P0134, P0135, P0171, P0172, P0201, P0202, P0203, P0204, P0220, P0222, P0223, P0300, P0301, P0302, P0303, P0304, P0336, P0340, P0341, P0442, P0446, P0452, P0453, P0455, P0496, P0502, P0506, P0507, P1133, P1134, P1516, P1680, P1681, P1682, P2101, P2119, P2120, P2122, P2123, P2125, P2127, P2128, P2135, P2138, or P2176 are not set.
- The engine run time is more than 60 seconds.
- The change in engine speed is less than 50 RPM.
- The engine speed is between 600-6,200 RPM.
- The change in throttle angle is less than 2 percent.
- The torque converter clutch (TCC) is stable to within 1.3 percent.
CONDITIONS FOR SETTING THE DTC
The ECM detects that the MAP sensor voltage is outside of the predicted range for more than 12 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.
- Clear the MIL and the DTC with a scan tool.
TEST DESCRIPTION
Steps 1 - 6:
Steps 7 - 15:
Steps 16 - 22:
Steps 23 - 30:
The number below refers to the step number on the diagnostic table.
4. This step tests the ability of the MAP sensor to correctly indicate BARO.
13. The measurement noted in this step will be used in subsequent steps if the measurement does not exceed the specified value.
16. This step calculates the resistance in the 5-volt reference circuit.
17. This step calculates the resistance in the low reference circuit.