• | 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 purpose of this diagnostic is to analyze the performance of the MAP sensor by comparing the measured pressure changes to the following 2 distinct models:
• | The engine cranking model uses BARO and boost pressure as inputs |
• | The engine running model uses BARO, boost pressure, throttle opening and engine speed as inputs |
• | DTCs P0096, P0097, P0098, P0099, P0107, P0108, P0121, P0122, P0123, P0221, P0222, P0223, P0236, P0237, P0238, P0455, P0496, P2176, P2227, P2228, P2229 are not set. |
• | The engine OFF timer is greater than 4 seconds before cranking begins. |
• | The engine is cranking at less than 400 RPM for at least 200 ms. |
• | This DTC runs once per key cycle within the enabling conditions. |
• | DTCs P0010, P0011, P0013, P0014, P0107, P0108, P0121, P0122, P0123, P0221, P0222, P0223, P0236, P0237, P0238, P0341, P0342, P0343, P0366, P0367, P0368, P2088, P2089, P2090, P2091, P2227, P2228, P2229 are not set. |
• | The engine is running and the ECM has counted greater than 200 RPM. |
• | The engine speed is greater than 1,500 RPM once during the drive cycle. |
• | If start-up ECT is colder than -8°C (+18°F), then the diagnostic is disabled until the ECT reaches 30°C (86°F). |
• | The change in the MAP Sensor parameter is greater than 10 kPa once during the drive cycle. |
• | The TP Sensor parameter is less than 25 percent once during the drive cycle. |
• | This DTC runs continuously within the enabling conditions. |
The ECM detects when the engine is cranking that the MAP sensor signal plus a calibrated threshold is not within range of a model derived from BARO, and boost pressure for more than 2 seconds.
• | The ECM detects when the engine is running that the MAP sensor signal is less than or greater than a calibrated minimum/maximum threshold for more than 4 seconds continuously, or 50 seconds cumulative. |
• | The ECM detects when the engine is running that the MAP sensor signal plus a calibrated threshold is not within range of a model derived from BARO, boost pressure, throttle opening, and engine speed for more than 4 seconds continuously, or 50 seconds cumulative. |
DTC P0106 is a Type B DTC.
DTC P0106 is a Type B DTC.
• | The charge air cooler (CAC) is connected to the turbocharger and to the throttle body by flexible ductwork that requires the use of special high torque fastening clamps. These clamps cannot be substituted. In order to prevent any type of air leak when servicing the ductwork, the tightening specifications and proper positioning of the clamps is critical and must be strictly adhered to. |
• | Use a solution of dish soap and water in a spray bottle to pinpoint any suspected air leaks in the induction system and in the CAC assembly. |
• | The BARO sensor is integrated within the ECM, and it has a port on the housing that allows it to sense the ambient pressure. A buildup of contamination at this opening may hinder the operation of the BARO sensor. |
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. |
• | Any damaged components |
• | Loose or improper installation including the flexible ductwork of the turbocharger and the CAC |
• | An air flow restriction |
• | Any vacuum leak |
• | In cold climates, inspect for any snow or ice buildup at the BARO port on the ECM |
• | A restriction in the MAP sensor port or the BARO port |
⇒ | 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.
THEN
Ignition ON, Engine OFF, MAP Sensor Parameter | MAP Sensor Parameter With 5 Inches of Vacuum Applied | MAP Sensor Parameter With 10 Inches of Vacuum Applied |
---|---|---|
100 kPa | 79-87 kPa | 62-70 kPa |
95 kPa | 74-82 kPa | 57-65 kPa |
90 kPa | 69-77 kPa | 52-60 kPa |
80 kPa | 59-67 kPa | 42-50 kPa |
70 kPa | 49-57 kPa | 32-40 kPa |
60 kPa | 39-47 kPa | 22-30 kPa |
⇒ | 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 |