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Home >> Chrysler >> 2009 >> PT Cruiser Limited >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> DTCS P0700 To P2503 - Gas >> P1187-THOTTLE Inlet Pressure/Map Correlation >> Diagnostic Test

Diagnostic Test

  1. COMPARING MAP AND TIP 
    1. Turn the ignition on.
    2. Using the scan tool, monitor both the MAP and TIP kPa.
      NOTE: The MAP and TIP should both be within the range of 56 kPa to 112 kPa.

      Are either MAP or TIP out of range.

      Yes 

      • Go to step  2

      No 

  2. CHECKING FOR OTHER DTCS 
    1. With the scan tool, read the PCM DTCs.
      NOTE: If there are any other MAP Sensor or Throttle Inlet Pressure Sensor DTCs present, repair the other MAP Sensor or Throttle Inlet Pressure Sensors before continuing.

      Does the scan tool display any other DTCs?

      Yes 

      No 

      • Go to step  3
  3. MAP/TIP SENSOR 

    Select the Sensor that was not within range (56 kPa - 112 kPa).

    TIP SENSOR 

    • Go to step  4

    MAP SENSOR 

    • Go to step  11
  4. CHECKING THE HOSES AND TUBING 
    1. Before continuing this test, visually inspect the TIP sensor connector for any damage or corrosion. Repair as necessary.
      NOTE: The exhaust system must be free from any restriction to perform this test.
    2. Check all of the tubes and hoses between the air cleaner and the intake manifold for loose connection, damage or restriction.
    3. Check all of the tubes connected to the intercooler for loose connection, damage or restriction.
    4. Check all of the tubes and hoses connected to the turbocharger, TIP Solenoid, Surge Solenoid and Wastegate Solenoid for loose connection, damage or restriction.
      NOTE: Solenoid design and hose connections are identical for all three solenoids. It is possible to connect the hoses to the incorrect solenoid. Verify that hoses are connected to the correct solenoid.

      Are any of these conditions evident?

      Yes 

      No 

      • Go to step  5
  5. (K153) TIP SIGNAL CIRCUIT OPEN 
    1. Turn the ignition off.
    2. Disconnect the TIP Sensor harness connector.
    3. Disconnect the PCM harness connector.
      CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install PCM Pinout Box 8815 to perform diagnosis.
    4. Measure the resistance of the (K153) TIP Signal circuit from the TIP Sensor harness connector to the appropriate terminal of special tool #8815.

      Is the resistance below 5.0 ohms?

      Yes 

      • Go to step  6

      No 

  6. (K914) SENSOR GROUND CIRCUIT OPEN 
    CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install PCM Pinout Box 8815 to perform diagnosis.
    1. Measure the resistance of the (K914) Sensor ground circuit from the TIP Sensor harness connector to the appropriate terminal of special tool #8815.

      Is the resistance below 5.0 ohms?

      Yes 

      • Go to step  7

      No 

  7. SOLENOID TEST #1 
    1. Turn the ignition off.
    2. Disconnect the hoses from the TIP Solenoid.
    3. Install a plug on the TIP Solenoid hose B connection point.
    4. Connect a vacuum pump to the TIP Solenoid hose A connection point.
    5. With vacuum pump apply 20 inches of vacuum to the TIP Solenoid hose A connection point.
      NOTE: Vacuum reading should not drop below 10 inches within 5 seconds.

      Does vacuum read above 10 inches for at least 5 seconds?

      Yes 

      • Go to step  8

      No 

  8. SOLENOID TEST #2 
    1. Install a plug on the TIP Solenoid hose C connection point.
    2. Connect a vacuum pump to the TIP Solenoid hose A connection point.
    3. Attempt to apply 20 inches of vacuum to the TIP Solenoid hose A connection point.
      NOTE: Vacuum should escape through the Solenoid hose B connection point.

      Does vacuum escape through the Solenoid hose B connection point?

      Yes 

      • Go to step  9

      No 

  9. SOLENOID TEST #3 
    1. Install a plug on TIP Solenoid hose C connection point.
    2. Connect a vacuum pump to the TIP Solenoid hose B connection point.
      NOTE: For the result of this test to be accurate the solenoid must be activated (turned on). Actuate the solenoid using the scan tool or apply 12 volts and Ground to the appropriate solenoid terminals to turn the solenoid on.
    3. With vacuum pump apply 20 inches of vacuum to the TIP Solenoid hose B connection point.
      NOTE: Vacuum reading should not drop below 10 inches within 5 seconds.

      Does vacuum read above 10 inches for at least 5 seconds?

      Yes 

      • Go to step  10

      No 

  10. SOLENOID TEST #4 
    1. Install a plug on the TIP Solenoid hose A connection point.
    2. Connect a vacuum pump to the TIP Solenoid hose B connection point.
      NOTE: For the result of this test to be accurate the solenoid must be activated (turned on). Actuate the solenoid using the scan tool or apply 12 volts and Ground to the appropriate solenoid terminals to turn the solenoid on.
    3. Attempt to apply 20 inches of vacuum to the TIP Solenoid hose B connection point.
      NOTE: Vacuum should escape through the Solenoid hose C connection point.

      Does vacuum escape through the Solenoid hose C connection point?

      Yes 

      No 

  11. CHECKING VACUUM PASSAGE 
    1. Before continuing this test, visually inspect the MAP sensor connector for any damage or corrosion. Repair as necessary.
      NOTE: The exhaust system must be free from any restriction to perform this test.
    2. Turn the ignition off.
    3. Remove the MAP Sensor.
    4. Visually inspect the vacuum passages on both the intake side and component. Ensure that it is free from any blockage.

      Was any blockage found?

      Yes 

      No 

      • Go to step  12
  12. (F856) 5-VOLT SUPPLY CIRCUIT 
    1. Disconnect the MAP Sensor harness connector.
    2. Turn the ignition on.
    3. Measure the voltage of the (F856) 5-Volt Supply circuit in the MAP Sensor harness connector.

      Is the voltage between 4.5 to 5.2 volts?

      Yes 

      • Go to step  13

      No 

  13. MAP SENSOR INTERNAL SHORT 
    1. With the scan tool, monitor the MAP Sensor voltage.

      Is the voltage above 4.5 volts with the harness connector disconnected?

      Yes 

      • Go to step  14

      No 

      • Go to step  15
  14. MAP SENSOR INTERNAL OPEN 
    1. Connect a jumper wire between the (K1) MAP Sensor Signal circuit and the (K900) Sensor ground circuit.
    2. With the scan tool, monitor the MAP Sensor voltage.
    3. Cycle the ignition switch off and on.

      Is the voltage below 1.0 volt?

      Yes 

      No 

      • Go to step  15
  15. (K1) MAP SIGNAL CIRCUIT OPEN 
    1. Turn the ignition off.
    2. Disconnect the PCM harness connector.
      CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install PCM Pinout Box 8815 to perform diagnosis.
    3. Measure the resistance of the (K1) MAP Signal circuit from the MAP Sensor harness connector to the appropriate terminal of special tool #8815.

      Is the resistance below 5.0 ohms?

      Yes 

      • Go to step  16

      No 

  16. (K1) MAP SIGNAL CIRCUIT SHORTED TO GROUND 
    1. Measure the resistance between ground and the (K1) MAP Signal circuit at the MAP Sensor harness connector.

      Is the resistance below 100 ohms?

      Yes 

      No 

      • Go to step  17
  17. PCM 
    NOTE: Before continuing, check the PCM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.

    If there are no possible causes remaining, view repair.

    Repair 

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