Circuit/System Verification (w/TAC)
- Ignition ON, observe the DTC information with a scan tool. Verify that DTC P0107, P0108, or P0651 is not set.
- If any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- Verify none of the following conditions exist:
- Leaking exhaust gas recirculation (EGR) valve
- Restricted exhaust-Refer to Restricted Exhaust .
- Engine mechanical condition-For example, low compression or incorrect timing belt installation. Refer to Symptoms - Engine Mechanical or Timing Belt Inspection .
- Determine the current vehicle testing altitude. Compare the MAP sensor pressure parameter to the reading in the table. The MAP sensor pressure parameter should be within the specified range indicated in the table.
- Start the engine and observe the scan tool MAP sensor pressure parameter. The MAP sensor pressure parameter should change while starting the engine.
- Engine running, observe the scan tool MAP Sensor pressure parameter. The reading should be between 32-48 kPa.
- Snap the throttle while observing the scan tool MAP sensor pressure parameter. The MAP sensor pressure parameter should change rapidly when the throttle position changes.
- 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.
IMPORTANT:
In extreme cold weather conditions ice may form in the vacuum source to the MAP sensor and may set a DTC. Inspect the MAP sensor and the vacuum source for ice, moisture, or other restrictions.