• | 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, P0193, P0236, P0335, P0642 | P0106, P0107 | P0107 | P0193, P0236, P0606, P0643, P0690, P2227 | P0641, P0642, P0643 |
MAP Sensor Signal | P0107 | P0106, P0107 | P0107 | P0106, P0108 | P0106 |
Low Reference | -- | P0106 | P0106 | -- | -- |
Circuit | Short to Ground | Open | Short to Voltage |
---|---|---|---|
Operating Conditions: Engine running, transmission in Park or Neutral. Parameter Normal Range: 20-48 kPa, varies with altitude. | |||
5-Volt Reference | 0 kPa | 0 kPa | 0-30 kPa |
MAP Sensor Signal | 0 kPa | 0 kPa | 255 kPa |
Low Reference | -- | 80-250 kPa | -- |
The manifold absolute pressure (MAP) sensor has a 5-volt reference circuit, a low reference circuit, and a signal circuit. The engine control module (ECM) supplies 5 volts to the MAP sensor on the 5-volt reference circuit, and provides a ground on the low reference circuit. The MAP sensor provides a voltage signal to the ECM on the signal circuit relative to the intake manifold pressure changes.
The sensor used on this engine is a three atmosphere sensor. Pressure in the intake manifold is affected by engine speed, throttle opening, turbocharger boost pressure, intake air temperature (IAT), and barometric pressure (BARO). Under normal operation the greatest pressure that can exist in the intake manifold at ignition ON, engine OFF is equal to the BARO. When the vehicle is operated at wide-open throttle (WOT), the turbocharger can increase the pressure to near 240 kPa. The least manifold pressure occurs when the vehicle is decelerating and can range from 13-48 kPa.
• | The ignition is ON, or the engine is running. |
• | The DTCs run continuously within the enabling conditions. |
The ECM detects that the MAP sensor voltage is less than 0.19 volt for more than 4 seconds continuously, or 50 seconds cumulative.
The ECM detects that the MAP sensor voltage is greater than 4.80 volts for more than 4 seconds continuously, or 50 seconds cumulative.
DTCs P0107 and P0108 are Type B DTCs.
DTCs P0107 and P0108 are Type B DTCs.
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Control Module References for scan tool information
• | J 23738-A Mityvac |
• | J 35555 Metal Mityvac |
⇒ | If any of the DTCs are set, refer to DTC P0641-P0643, P0651-P0653, or P0697-P0699. |
⇒ | 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 3 for a short to voltage. If the circuit tests normal, replace the ECM. |
⇒ | If less than the specified range, test the signal circuit terminal 3 for a short to ground or an open/high resistance. If the circuit tests normal, replace the ECM. |
Important: You must perform the Circuit/System Testing in order to verify the integrity of the MAP sensor circuits before proceeding with the Component Testing.
⇒ | If the voltage reading is erratic, replace the MAP sensor. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for ECM replacement, setup, and programming |