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 P0107: Manifold Absolute Pressure (MAP) Sensor Circuit Low VoltageDTC P0108: Manifold Absolute Pressure (MAP) Sensor Circuit High Voltage
Diagnostic Fault Information
Circuit | Short to Ground | High Resistance | Open | Short to Voltage | Signal Performance |
|---|---|---|---|---|---|
5-Volt Reference | P0107, P0452, P0522, P0532, P0641, P0807 | P0106, P0107 | P0107 | P0108, P0453, P0523, P0641, P0808 | P0106, P0107 |
MAP Sensor Signal | P0107 | P0106, P0107 | P0107 | P0106, P0108, P0523, P0641 | P0106, P0107, P1101 |
Low Reference | -- | P0106, P0107 | P0106, P0108, P1101 | -- | P0106, P0108 |
Typical Scan Tool Data
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 | 10 kPa | 10 kPa | 104 kPa |
MAP Sensor Signal | 10 kPa | 10 kPa | 104 kPa |
Low Reference | -- | 80-103 kPa | -- |
Circuit/System Description
The MAP sensor has a 5-volt reference circuit, a low reference circuit, and a signal circuit. The control module supplies 5 volts to the MAP sensor on a 5-volt reference circuit, and provides a ground on a low reference circuit. The MAP sensor provides a voltage signal to the control module on a signal circuit relative to the intake manifold pressure changes.
Conditions for Running the DTC
P0107
| • | DTCs P0120, P0121, P0122, P0123, P0220, P0222, P0223, P0641, P0651 or P2135 are not set. |
| • | The engine is running greater than or equal to 400 RPM. |
| • | The throttle position is greater than or equal to 0 percent when the engine speed is less than or equal to 1,000 RPM. |
| OR |
| • | The throttle position is greater than or equal to 12.5 percent when the engine speed is greater than 1,000 RPM. |
| • | The DTC runs continuously when the above conditions are met. |
P0108
| • | The engine has been running for a length of time that is determined by the start-up coolant temperature. The length of time ranges from 5.5 minutes at less than -30°C (-22°F) to 10 seconds at more than +30°C (+86°F). |
| • | DTCs P0120, P0121, P0122, P0123, P0220, P0222, P0223, or P2135 are not set. |
| • | The throttle position is less than or equal to one percent when the engine speed is less than or equal to 1,200 RPM. |
| OR |
| • | The throttle position is less than or equal to 20 percent when the engine speed is greater than 1,200 RPM. |
| • | The DTC runs continuously when the above conditions are met. |
Conditions for Setting the DTC
P0107
The control module detects that the MAP sensor voltage is less than 0.05 volt for more than 5 seconds.
P0108
The control module detects that the MAP sensor voltage is more than 4.9 volts for more than 5 seconds.
Action Taken When the DTC Sets
DTC P0107 and P0108 are Type B DTCs.
Conditions for Clearing the DTC
DTC P0107 and P0108 are Type B DTCs.
Reference Information
Schematic Reference
Connector End View Reference
Electrical Information Reference
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Special Tools Required
| • | J 23738-A Mityvac |
| • | J 35555 Metal Mityvac |
Circuit/System Verification
- Verify that DTCs P0641 or P0651 are not set.
- Ignition ON, observe the MAP Sensor parameter. The reading should be between 0.05-4.9 volts.
- Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
| ⇒ | If any of the DTCs are set, refer to DTC P0641 or P0651 . |
Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the MAP sensor.
- Ignition OFF for 90 seconds, test for less than 5 ohms of resistance between the low reference circuit terminal A and ground.
- Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit terminal C and ground.
- Verify the scan tool MAP Sensor parameter is less than 12 kPa.
- Install a 3A fused jumper wire between the signal circuit terminal B and the 5-volt reference circuit terminal C. Verify the scan tool MAP Sensor parameter is greater than 102 kPa.
- If all circuits test normal, test or replace the MAP sensor.
| ⇒ | 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. |
Component Testing
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.
- Ignition OFF, remove the MAP sensor.
- Install a 3A fused jumper wire between the 5-volt reference circuit terminal C and the corresponding terminal of the MAP sensor.
- Install a jumper wire between the low reference circuit terminal A of the MAP sensor and ground.
- Install a jumper wire at terminal B of the MAP sensor.
- Connect a DMM between the jumper wire from terminal B of the MAP sensor and ground.
- Ignition ON, with the J 23738-A or J 35555 slowly apply vacuum to the sensor while observing the voltage on the DMM. The voltage should vary between 0-5.2 volts, without any spikes or dropouts.
| ⇒ | If the voltage reading is erratic, replace the MAP sensor. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for ECM replacement, setup, and programming |
