PRE-RELEASE
DTC P0107 or P0108
| DTC P0107 or P0108 |
| Diagnostic Instructions |
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Perform the
Diagnostic System Check - Vehicle
prior to using this diagnostic procedure.
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Review
Strategy Based Diagnosis
for an overview of the diagnostic approach.
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Diagnostic Procedure Instructions
provides an overview of each diagnostic category.
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| DTC Descriptors |
DTC P0107
Manifold Absolute Pressure (MAP) Sensor Circuit Low Voltage
DTC P0108
Manifold Absolute Pressure (MAP) Sensor Circuit High Voltage
| Diagnostic Fault Information |
| Circuit | Short to Ground | High resistance | Open | Short to Voltage | Signal Performance |
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5 V Reference
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P0107, P0193, P0236, P0335, P0697
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P0106, P0107
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P0107
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P0193, P0236, P0606, P0690, P2227
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P0697
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MAP Sensor Signal
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P0107
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P0106, P0107
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P0107
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P0106, P0108
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P0106
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Low Reference
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-
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P0106
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P0106
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-
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-
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| Typical Scan Tool Data |
MAP Sensor
| Circuit | Short to Ground | Open | Short to Voltage |
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Operating Conditions:
Engine running, transmission in Park or Neutral.
Parameter Normal Range: 20-48 kPa, varies with altitude. |
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5 V Reference
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0 kPa
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0 kPa
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0-30 kPa
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MAP Sensor Signal
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0 kPa
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0 kPa
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255 kPa
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Low Reference
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-
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80-250 kPa
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-
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| Circuit/System Description |
The manifold absolute pressure (MAP) sensor has a 5 V reference circuit, a low reference circuit, and a signal circuit. The engine control module (ECM) supplies 5 V to the MAP sensor on the 5 V 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). During normal operation, the highest pressure that can occur in the intake manifold with the ignition ON and the engine OFF is equal to the barometric pressure (BARO). When the vehicle is run with wide open throttle (WOT) , the turbocharger can increase the pressure almost 240 kPa (2.4 bar). The lowest manifold pressure arises when the car's speed decreases and is within the range 13-48 kPa (0.13-0.48 bar).
| Conditions for Running the DTC |
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The ignition is ON or the engine is running.
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The DTCs run continuously within the enabling conditions.
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| Conditions for Setting the DTC |
P0107
The ECM detects that the MAP sensor voltage is less than 0.19 V for more than 4 s continuously, or 50 s cumulative.P0108
The ECM detects that the MAP sensor voltage is more than 4.80 V for more than 4 s continuously, or 50 s cumulative.| Action Taken When the DTC Sets |
DTCs P0107 and P0108 are Type B DTCs.
| Conditions for Clearing the MIL/DTC |
DTCs P0107 and P0108 are Type B DTCs.
| Reference Information |
Schematic Reference
Engine Controls Schematics
Connector End View Reference
Component Connector End Views
Electrical Information Reference
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Circuit Testing
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Connector Repairs
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Testing for Intermittent Conditions and Poor Connections
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Wiring Repairs
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DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
Special Tools
EN 35555 Metal Mityvac
For equivalent regional tools, refer to Special Tools .
| Circuit/System Verification |
| 1. |
Verify that DTC P0697 is not set.
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| 2. |
If DTC P0697 is set, refer to
DTC P0641, P0651, P0697, or P06A3 (ECM)
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| 3. |
Ignition ON, observe the scan tool MAP Sensor parameter. The reading should be between 0.20-4.80 V.
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| 4. |
Operate the vehicle within the conditions for running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
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| Circuit/System Testing |
| 1. |
Ignition OFF, disconnect the harness connector at the B74 MAP sensor.
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| 2. |
Ignition OFF for 90 s, test for less than 5 Ω between the low reference circuit terminal 2 and ground.
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| 3. |
If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K20 ECM.
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| 4. |
Ignition ON, test for 4.8-5.2 V between the 5 V reference circuit terminal 1 and ground.
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| 5. |
If less than the specified range, test the 5 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K20 ECM.
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| 6. |
If more than the specified range, test the 5 V reference circuit for a short to voltage. If the circuit tests normal, replace the K20 ECM.
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| 7. |
Verify the scan tool MAP Sensor parameter is less than 1 kPa.
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| 8. |
If more than the specified range, test the signal circuit terminal 3 for a short to voltage. If the circuit tests normal, replace the K20 ECM.
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| 9. |
Install a 3 A fused jumper wire between the signal circuit terminal 3 and the 5 V reference circuit terminal 1. Verify the scan tool MAP Sensor parameter is greater than 254 kPa.
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| 10. |
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 K20 ECM.
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| 11. |
If the circuits test normal, test or replace the B74 MAP sensor.
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| Component Testing |
| Note | ||
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You must perform the Circuit/System Testing in order to verify the integrity of the MAP sensor circuits before proceeding with the Component Testing. |
Erratic Signal Test
| 1. |
Ignition OFF, remove the B74 MAP sensor.
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| 2. |
Install a 3 A fused jumper wire between the 5 V reference circuit terminal 1 and the corresponding terminal of the B74 MAP sensor.
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| 3. |
Install a jumper wire between the low reference circuit terminal 2 of the B74 MAP sensor and ground.
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| 4. |
Ignition ON, with the
EN 35555
Mityvac , slowly apply vacuum to the sensor while measuring the voltage at terminal 3 of the MAP sensor. The voltage should vary between 0-5 V, without any spikes or dropouts.
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| 5. |
If the voltage reading is erratic, replace the B74 MAP sensor.
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| Repair Instructions |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
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Manifold Absolute Pressure Sensor Replacement
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Control Module References
for ECM replacement, setup, and programming
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