• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
• | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
• | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
Circuit | Short to Ground | High Resistance | Open | Short to Voltage | Signal Performance |
---|---|---|---|---|---|
5-Volt Reference | P0107, P0452, P0532, P0641 | P0107 | P0107 | P0108, P0453, P0533, P0641 | P0107 |
MAP Sensor Signal | P0107 | P0107 | P0107 | P0108 | P0107 |
Low Reference | -- | P0108 | P0108 | -- | P0108 |
Circuit | Normal Range | Short to Ground | Open | Short to Voltage |
---|---|---|---|---|
5-Volt Reference | -- | 10 kPa | 10 kPa | 104 kPa |
MAP Sensor Signal | 12-103 kPa | 10 kPa | 10 kPa | 104 kPa |
Low Reference | -- | 36 kPa | 93 kPa | -- |
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:
• | The 5-volt reference circuit |
• | The low reference circuit |
• | The MAP sensor 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 MAP sensor 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). 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 PCM monitors the MAP sensor signal for voltage outside of the normal range.
• | DTCs P0016, P0102, P0103, P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0128, P0335, or P0336 are not set. |
• | The engine is running. |
• | The engine coolant is between 70-125°C (158-257°F). |
• | The intake air temperature is between -7 and +125°C (+19.4 and +257°F). |
• | The control module detects the MAP sensor is not within the predicted range for more than 2 seconds. |
• | This diagnostic runs continuously. |
DTC P0106 is a Type B DTC
DTC P0106 is a Type B DTC
Powertrain Control Module Connector End Views
Engine Controls Connector End Views
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
J 23738-A Mityvac
Important: Verify that the engine is in good mechanical condition before continuing with this diagnostic.
• | Any damaged components |
• | Loose or improper installation |
• | An air flow restriction |
• | Any vacuum leak |
• | Improperly routed vacuum hoses |
• | In cold climates, inspect for any snow or ice buildup |
Important: All electrical components and accessories must be turned OFF and allowed to power down.
⇒ | If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the ECM. |
⇒ | If less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the ECM. |
⇒ | If greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the ECM. |
⇒ | If greater than the specified range, test the signal circuit terminal B for a short to voltage. If the circuit tests normal, replace the ECM. |
⇒ | If less than the specified range, test the signal circuit for short to ground or an open/high resistance. If the circuit tests normal, replace the ECM. |
⇒ | If the voltage is not within the specified range or is erratic, replace the MAP sensor. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.