Diagnostic Instructions
| • | 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 |
DTC Descriptors
DTC P0106: Manifold Absolute Pressure Sensor Circuit Range/PerformanceDiagnostic Fault Information
Circuit | Short to Ground | High Resistance | Open | Short to Voltage | Signal Performance |
|---|---|---|---|---|---|
5-Volt Reference | P0107, P0452, P0522, P0532, P0641 | P0106, P0107 | P0107 | P0106, P0108, P0522, P0533, P0641 | P0106, P0107 |
MAP Sensor Signal | P0107 | P0106, P0107 | P0107 | P0108 | P0106, P0107, P1101 |
Low Reference | -- | P0106, P0108 | P0106, P0108 | -- | P0106, P0108 |
Typical Scan Tool Data
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 | -- | -- | 80-103 kPa | -- |
Circuit Description
The manifold absolute pressure (MAP) sensor measures the pressure inside the intake manifold. Pressure in the intake manifold is affected by engine speed, throttle opening, air temperature. A diaphragm within the MAP sensor is displaced by the pressure changes that occur from the varying load and operating conditions of the engine. The sensor translates this action into electrical resistance. The MAP sensor wiring includes 3 circuits. The engine control module (ECM) supplies a regulated 5 volts to the sensor on a 5-volt reference circuit. The ECM supplies a ground on a low reference circuit. The MAP sensor provides a signal voltage to the ECM, relative to the pressure changes, on the MAP sensor signal circuit. The ECM converts the signal voltage input to a pressure value.
Conditions for Running the DTC
P0107
| • | DTCs P0641, P0651, P1516, P2101, P2125, P2135, P2138, P2176 are not set. |
| • | The engine speed is more than 400 RPM. |
| • | The throttle angle is more than 0 percent when the engine speed is less than 800 RPM. |
| • | The throttle angle is more than 13 percent when the engine speed is more than 800 RPM. |
| • | This DTC runs continuously within the enabling conditions. |
P0108
| • | DTCs P1516, P2101, P2125, P2135, P2138 or P2176 are not set. |
| • |
| The engine has been running for a period of time that is determined by the start-up engine coolant temperature (ECT). The time ranges from 8 seconds at less than -30°C (-22°F) to 3 seconds at more than 30°C (86°F). |
| • | The throttle angle is less than one percent when the engine speed is less than 1,200 RPM. |
| • | The throttle angle is less than 20 percent when the engine speed is more than 1,200 RPM. |
| • | This DTC runs continuously within the enabling conditions. |
Conditions for Setting the DTC
The ECM detects that the MAP sensor pressure is not within range of the calculated pressure that is derived from the system modules for more than 0.5 of a second.
Action Taken when the DTC Sets
DTC P0106 is a type B DTC.
Conditions for Clearing the MIL/DTC
DTC P0106 is a type B DTC.
Diagnostic Aids
Verify the integrity of the MAP sensor system by inspecting for the following conditions:
| • | Intake manifold vacuum leaks. |
| • | Any damage to the MAP sensor housing. |
| • | Any damage to the MAP sensor seal. |
| • | A loose or incorrectly installed MAP sensor. |
| • | A restriction in the vacuum source of the MAP sensor. |
Reference Information
Schematic Reference
Connector End View Reference
Electrical Information Reference
Scan Tool Reference
Circuit/System Verification
| • | Use the scan tool and compare the MAP Sensor parameter to a known good vehicle, under various operating conditions. |
| • | Use the scan tool and compare the MAP Sensor parameter at ignition ON, with the engine OFF, to the Altitude vs Barometric Pressure table. Refer to Altitude Versus Barometric Pressure . |
Circuit/System Testing
- Ignition ON, engine OFF.
- Disconnect the MAP sensor.
- Connect a test lamp between the MAP sensor 5 volt reference circuit and a known ground.
- Measure for a proper range of 4.8-5.2 volts between the MAP sensor 5-volt reference circuit and a known ground.
- With the MAP sensor still disconnected, use the scan tool to observe the MAP Sensor parameter for the proper value of less than 12 kPa.
- Connect a 3-A fusible link wire between the MAP sensor 5 volt reference circuit and the MAP sensor signal circuit.
- Use the scan tool to observe the MAP Sensor parameter for the proper value of more than 90 kPa.
- Ignition OFF, and all electrical accessories OFF. Allow sufficient time for all of the control modules to power down before taking a resistance measurement.
- Measure for a proper value of less than 10 ohms of resistance between the low reference circuit of the MAP sensor and a known ground.
- If all of the MAP sensor circuits test normal, then replace the MAP sensor.
Important: Certain resistances will not be detectable if a test lamp is not connected to provide a circuit load.
Important: The MAP sensor 5 volt reference circuit is spliced to other components of the vehicle and may set additional DTC's.
| ⇒ | If the voltage is less than the specified range, then test the circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the ECM. |
| ⇒ | If the voltage is more than the specified range, then test the circuit for a short to voltage. If the circuit tests normal, replace the ECM. |
| ⇒ | If the MAP Sensor parameter is more than 12 kPa, then test the MAP sensor signal circuit for a short to voltage. If the circuit tests normal, replace the ECM. |
| ⇒ | If the MAP Sensor parameter is less than 90 kPa, then test the MAP sensor signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the ECM. |
| ⇒ | If the resistance is more than 10 ohms, then test the circuit for a high resistance. If the MAP sensor low reference circuit tests normal, then replace the ECM. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Engine Control Module Replacement for engine control module replacement, setup and programming. |
