| Table 1: | P0107- MAP Sensor Circuit Low Voltage |
| Table 2: | P0107- MAP Sensor Circuit Low Voltage |
Circuit Description
The Manifold Absolute Pressure (MAP) sensor responds to changes in intake manifold pressure (vacuum). The MAP sensor signal voltage to the PCM varies from below 2 volts at idle (high vacuum) to above 4 volts with the key ON, engine not running or at wide-open throttle (low vacuum). The MAP sensor is used to determine manifold pressure changes while the EGR flow test diagnostic is being run. Also to update the barometric pressure reading (BARO), as an enabling factor for other diagnostics. The PCM monitors the MAP signals for voltages outside the normal range of the MAP sensor. If the PCM detects a MAP sensor signal voltage that is excessively low, DTC P0107 will set.
Conditions for Running the DTC
| • | No TP sensor DTCs present. |
| • | System voltage greater than 9 volts. |
| • | The engine is running. |
| • | Idle speed is steady. |
| • | Throttle angle above 0%, if engine speed is less than 1000 RPM. |
| OR |
| • | Throttle angle above 10%, if engine speed is greater than 1000 RPM. |
Conditions for Setting the DTC
| • | The MAP sensor signal voltage is less than 0.1 volt. |
| • | Above conditions are present for longer than 200 3X reference periods (67 crankshaft revolutions). |
Action Taken When the DTC Sets
| • | The PCM will illuminate the malfunction indicator lamp (MIL) during the second consecutive trip in which the diagnostic test has been run and failed. |
| • | The PCM will store conditions which were present when the DTC set as Freeze Frame/Failure Records data. |
Conditions for Clearing the MIL/DTC
| • | The PCM will turn OFF the malfunction indicator lamp (MIL) during the third consecutive trip in which the diagnostic has run and passed. |
| • | The history DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction. |
| • | The DTC can be cleared by using a scan tool. |
Diagnostic Aids
Check for the following conditions:
| • | Poor connection at the PCM. Inspect harness connectors for backed out terminals, improper mating, broken locks, improperly formed or damaged terminals, and poor terminal to wire connection. |
| • | Damaged harness. Inspect the wiring harness for damage. If the harness appears to be OK, observe the MAP display on the scan tool while moving connectors and wiring harnesses related to the sensor. A change in the display will indicate the location of the malfunction. |
If DTC P0107 cannot be duplicated, the information included in the Fail Records data can be useful in determining when the DTC was last set. If it is determined that the DTC occurs intermittently, performing the DTC P1107 Manifold Absolute Pressure (MAP) Sensor Circuit Intermittent Low Voltage may isolate the cause of the malfunction.
Test Description
Number(s) below refer to the step number(s) on the Diagnostic Table:
1 | Did you perform A Powertrain On-Board Diagnostic (OBD) System Check? | -- | ||
2 |
Important:: Refer to DTC P1635 5 Volt Reference Circuit first, If set.
Is the MAP voltage parameter less then the specified value? | 0.1 volt | ||
3 |
Does the scan tool indicate DTC P0107 failed? | -- | Go to Diagnostic Aids | |
4 |
Does the scan tool indicate that MAP voltage parameter is near the specified value? | 4.95V | ||
5 |
Does the scan tool indicate that the MAP voltage parameter is near the specified value? | 4.95V | ||
6 |
Did you find and correct the condition? | -- | ||
7 | Test the 5 volt reference A circuit of the MAP sensor for a poor connection at the PCM and replace terminal if necessary. Refer to Intermittents and Poor Connections Diagnosis and Repairing Connector Terminals . Did you find and correct the condition? | -- | ||
8 |
Did you find and correct the condition? | -- | ||
9 | Test the signal circuit and the 5 volt reference circuit of the MAP sensor for a poor connection at the MAP sensor and replace the terminal as necessary. Refer to Intermittents and Poor Connections Diagnosis and Repairing Connector Terminals . Did you find and correct the condition? | -- | ||
10 | Test the signal circuit and the 5 volt reference circuit of the MAP sensor for a poor connection at the PCM and replace terminal as necessary. Refer to Intermittents and Poor Connections Diagnosis and Repairing Connector Terminals . Did you find and correct the condition? | -- | ||
11 | Replace the MAP sensor. Refer to Manifold Absolute Pressure Sensor Replacement . Did you complete the replacement? | -- | -- | |
12 |
Important:: Perform the set up procedure for the PCM. Replace the PCM. Refer to Powertrain Control Module Replacement/Programming . Did you complete the replacement? | -- | -- | |
13 |
Does the DTC reset? | -- | System OK |
Test Description
Number(s) below refer to the step number(s) on the Diagnostic Table:
1 | Did you perform A Powertrain On-Board Diagnostic (OBD) System Check? | -- | ||
2 |
Important:: Refer to DTC P1635 5 Volt Reference Circuit first, If set.
Is the MAP voltage parameter less then the specified value? | 0.1 volt | ||
3 |
Does the scan tool indicate DTC P0107 failed? | -- | Go to Diagnostic Aids | |
4 |
Does the scan tool indicate that MAP voltage parameter is near the specified value? | 4.95V | ||
5 |
Does the scan tool indicate that the MAP voltage parameter is near the specified value? | 4.95V | ||
6 |
Did you find and correct the condition? | -- | ||
7 | Test the 5 volt reference A circuit of the MAP sensor for a poor connection at the PCM and replace terminal if necessary. Refer to Intermittents and Poor Connections Diagnosis and Repairing Connector Terminals . Did you find and correct the condition? | -- | ||
8 |
Did you find and correct the condition? | -- | ||
9 | Test the signal circuit and the 5 volt reference circuit of the MAP sensor for a poor connection at the MAP sensor and replace the terminal as necessary. Refer to Intermittents and Poor Connections Diagnosis and Repairing Connector Terminals . Did you find and correct the condition? | -- | ||
10 | Test the signal circuit and the 5 volt reference circuit of the MAP sensor for a poor connection at the PCM and replace terminal as necessary. Refer to Intermittents and Poor Connections Diagnosis and Repairing Connector Terminals . Did you find and correct the condition? | -- | ||
11 | Replace the MAP sensor. Refer to Manifold Absolute Pressure Sensor Replacement . Did you complete the replacement? | -- | -- | |
12 |
Important:: Perform the set up procedure for the PCM. Replace the PCM. Refer to Powertrain Control Module Replacement/Programming . Did you complete the replacement? | -- | -- | |
13 |
Does the DTC reset? | -- | System OK |
