Circuit Description
The Manifold Absolute Pressure (MAP) sensor is a sensor that changes resistance based upon manifold vacuum. The PCM provides a 5 volt reference and ground. The MAP sensor signal varies between ground and 5 volts as manifold vacuum varies. As MAP decreases, voltage decreases (low engine load, high vacuum). As MAP increases, voltage increases (high engine load, low vacuum). The PCM uses the MAP sensor values as an indicator of engine load. DTC P1107 sets when the PCM detects a MAP sensor signal that is too low.
Conditions for Running the DTC
| • | DTC P0107, P0108, P0122 and P0123 not set. |
| • | Engine speed 700 RPM or less and throttle angle 18 degrees or less and transaxle in Park or Neutral. |
OR
| • | DTC P0107, P0108, P0122 and P0123 not set. |
| • | Engine speed 1800 RPM or less, throttle angle 13 degrees or greater and transaxle in Drive or Reverse. |
Conditions for Setting the DTC
The MAP sensor reading has been 0.08 volts or less.
Action Taken When the DTC Sets
| • | The Malfunction Indicator Lamp (MIL) will not illuminate. |
| • | No message will be displayed. |
Conditions for Clearing the DTC
| • | A History DTC will clear after forty consecutive warm-up cycles with no failures of any non-emission related diagnostic test. |
| • | A Last Test Failed (current) DTC will clear when the diagnostic runs and does not fail. |
| • | Use a scan tool to clear DTCs. |
| • | Interrupting PCM battery voltage may or may not clear DTCs. This practice is not recommended. Refer to Powertrain Control Module Description . |
Test Description
Number(s) below refer to the step number(s) on the Diagnostic Table.
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If DTC P0106 or P0107 are also set, diagnose them first because it may help to diagnose an intermittent MAP sensor.
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Checking for intermittent terminal contact at the fuel rail connector. Checking for intermittent terminal contact at the PCM.
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Checking for intermittent terminal contact at the MAP sensor.
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Checking for intermittent circuit faults that may cause a low MAP reading.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you perform the Powertrain On-Board Diagnostic (OBD) System Check? | -- | Go to Step 2 | |
Turn the key ON. Is DTC P0106 or DTC P0107 also set? | -- | Go to DTCs that are set | Go to Step 3 | |
Was terminal contact repaired? | -- | Go to Step 4 | ||
Was terminal contact repaired? | -- | Go to Step 5 | ||
Was terminal contact repaired? | -- | Go to Step 6 | ||
6 | Check the MAP sensor 5 volt reference circuit and MAP sensor signal circuit for an intermittent open or short to ground. Are any circuit failures found and repaired? | -- | Fault not present. Go to DTC P0106 MAP System Performance |
