P0106

Diagnostic Chart (Part 1 Of 2):

Diagnostic Chart (Part 2 Of 2):

Schematic:

CIRCUIT DESCRIPTION
The Manifold Absolute Pressure (MAP) sensor is a pressure sensor. The control module supplies the MAP sensor a reference voltage, signal, and ground circuits. When manifold vacuum is low, the MAP sensor signal voltage rises to a value near the reference voltage, and the MAP sensor signal voltage decreases when the manifold vacuum increases. The control module monitors the MAP sensor signal circuit voltage in order to calculate the vacuum within the intake manifold.

Certain vehicle models will also use the MAP sensor in order to calculate the Barometric Pressure (BARO) when the ignition switch is turned ON and the engine is NOT cranked. This BARO reading may also be updated whenever the engine is operated at Wide Open Throttle (WOT).

This DTC determines if the MAP sensor signal input to the VCM does not closely match what the predicted value for the MAP sensor should be. The VCM calculates what the MAP signal voltage should be, based on engine RPM. If the MAP sensor voltage and the predicted MAP sensor values do not closely match, this DTC will be set.

CONDITIONS FOR RUNNING THE DTC
^ No active TP sensor DTCs
^ No active EGR DTCs
^ Any variation in engine speed is less than 75 RPM
^ Any variation in throttle position is less than 1.5 percent
^ Any variation in idle air is less than 4 steps
^ The change in EGR flow rate is less than 2 percent
^ No change in brake switch status
^ No change in clutch switch status (manual transmission)
^ No change in AC clutch status for 2 seconds
^ The engine speed is between 400-5000 RPM

CONDITIONS FOR SETTING THE DTC
The MAP voltage is outside acceptable limits for more than 24 seconds.

ACTION TAKEN WHEN THE DTC SETS
^ The control module illuminates the malfunction indicator lamp (MIL) if a failure is detected during 2 consecutive key cycles.
^ The control module sets the DTC and records the operating conditions at the time the diagnostic failed. The failure information is stored in the scan tool Freeze Frame and Failure Records.

CONDITIONS FOR CLEARING THE MIL OR DTC
^ The control module turns OFF the MIL after 3 consecutive drive trips when the test has run and passed.
^ A history DTC will clear if no fault conditions have been detected for 40 warm-up cycles. A warm-up cycle occurs when the coolant temperature has risen 22°C (40°F) from the startup coolant temperature and the engine coolant reaches a temperature that is more than 70°C (158°F) during the same ignition cycle.
^ Use a scan tool in order to clear the DTCs.

DIAGNOSTIC AIDS
Inspect the MAP sensor vacuum source for leaks, restrictions, or faulty connections.

IMPORTANT: After removing the MAP sensor from the intake manifold, replace the MAP sensor to intake manifold seal.

Remove the MAP sensor from the intake manifold and gently twist the sensor in order to test for intermittent connections. Output changes of more than 0.1 volt indicate a bad connector or connection.

An intermittent may be caused by any of the following conditions:
^ A poor connection
^ Rubbed through wire insulation
^ A broken wire inside the insulation

Thoroughly inspect any circuitry that is suspected of causing the intermittent complaint. Refer to Testing for Intermittent and Poor Connections in Diagrams.

If a repair is necessary, refer to Wiring Repairs or Connector Repairs in Diagrams.

TEST DESCRIPTION
The numbers below refer to the step numbers on the diagnostic table.
2. This step checks the MAP sensors ability to correctly indicate barometric pressure.

In order to determine the correct MAP sensor display of barometric pressure for any elevation perform either of the following:
^ Compare the recorded MAP sensor display value to the BARO display on a known good vehicle.
^ Obtain the local weather service barometer reading inch Hg). Multiply the barometer reading by 3.4. The result indicates the correct BARO value in kPa for your area.
3. This step checks the MAP sensors ability to correctly indicate engine vacuum.

The MAP sensor display is only active while the engine is operating.