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Diagnostic Test

WARNING: This page is about a different car, the 2009 Dodge Caliber. However, it is still accessible from the selected car via links, so may be relevant.
  1. DTC IS ACTIVE 
    NOTE: Diagnose any CAN - C Communication DTCs before continuing with this test.
    NOTE: Diagnose and repair any system voltage DTCs before continuing with this test.
    1. Start the engine and allow it to reach normal operating temperature.
      WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts or fan. Do not wear loose clothing. Failure to follow these instructions may result in possible serious or fatal injury.
    2. With the scan tool, select View DTCs.

      Is the status Active for this DTC?

      Yes 

      • Go to step  2

      No 

  2. (K857) 5 VOLT SUPPLY CIRCUIT VOLTAGE 
    Fig 1: Checking 5-Volt Supply Circuit
    GC0103561Courtesy of CHRYSLER LLC
    1. Turn the ignition off.
    2. Disconnect the Throttle Inlet Pressure Sensor connector.
    3. Turn the ignition on.
    4. Measure the voltage of the (K857) 5 Volt Supply circuit in the Throttle Inlet Pressure Sensor harness connector.
      NOTE: The voltage should be 5.0 volts (plus or minus.1 volts).

      Is the voltage displayed as described above?

      Yes 

      • Go to step  3

      No 

      • Go to step  8
  3. (K153) TIP SIGNAL CIRCUIT SHORTED TO GROUND 
    Fig 2: Checking TIP Signal Circuit
    GC0103564Courtesy of CHRYSLER LLC
    1. Turn the ignition off.
    2. Disconnect the Powertrain Control Module (PCM) connector.
    3. Measure the resistance between ground and the (K153) TIP Signal circuit in the Throttle Inlet Pressure Sensor harness connector.

      Is the resistance above 100 ohms?

      Yes 

      • Go to step  4

      No 

  4. (K153) TIP SIGNAL CIRCUIT SHORTED TO (K152) TIP RETURN CIRCUIT 
    Fig 3: Checking TIP Signal Circuit
    GC0103565Courtesy of CHRYSLER LLC
    1. Measure the resistance between the (K153) TIP Signal circuit and the (K152) TIP Return circuit in the Throttle Inlet Pressure Sensor harness connector.

      Is the resistance above 100 ohms?

      Yes 

      • Go to step  5

      No 

  5. (K153) TIP SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE 
    Fig 4: Checking TIP Signal Circuit
    GC0103566Courtesy of CHRYSLER LLC
    NOTE: When checking circuits at the Powertrain Control Module (PCM), be careful not to damage or distort the connector terminals. Improper measurement technique could result in poor pin to terminal contact.
    1. Measure the resistance of the (K153) TIP Signal circuit between the Throttle Inlet Pressure Sensor harness connector and the Powertrain Control Module (PCM) harness connector.

      Is the resistance below 5.0 ohms?

      Yes 

      • Go to step  6

      No 

  6. (K152) TIP RETURN CIRCUIT OPEN OR HIGH RESISTANCE 
    Fig 5: Checking TIP Return Circuit
    GC0103567Courtesy of CHRYSLER LLC
    NOTE: When checking circuits at the Powertrain Control Module (PCM), be careful not to damage or distort the connector terminals. Improper measurement technique could result in poor pin to terminal contact.
    1. Measure the resistance of the (K152) TIP Return circuit between the Throttle Inlet Pressure Sensor harness connector and the Powertrain Control Module (PCM) harness connector.

      Is the resistance below 5.0 ohms?

      Yes 

      • Go to step  7

      No 

  7. THROTTLE INLET PRESSURE SENSOR SIGNAL VOLTAGE 
    1. Turn the ignition off.
    2. Connect the Powertrain Control Module (PCM) connector.
    3. Turn the ignition on.
    4. With the scan tool, read the Throttle Inlet Pressure Sensor signal voltage.
      NOTE: The voltage should be approximately 5.0 volts with the connector disconnected.

      Is the voltage as described with the connector disconnected?

      Yes 

      • Go to step  11

      No 

      • Go to step  12
  8. (K857) 5 VOLT SUPPLY CIRCUIT SHORTED TO GROUND 
    Fig 6: Checking 5-Volt Supply Circuit
    GC0103569Courtesy of CHRYSLER LLC
    1. Turn the ignition off.
    2. Disconnect the Powertrain Control Module (PCM) connector.
    3. Measure the resistance between ground and the (K857) 5 Volt Supply circuit in the Throttle Inlet Pressure Sensor harness connector.

      Is the resistance above 100 ohms?

      Yes 

      • Go to step  9

      No 

  9. (K857) 5 VOLT SUPPLY CIRCUIT SHORTED TO (K152) TIP RETURN CIRCUIT 
    Fig 7: Checking 5-Volt Supply Circuit
    GC0103570Courtesy of CHRYSLER LLC
    1. Measure the resistance between the (K857) 5 Volt Supply circuit and the (K152) TIP Return circuit in the Throttle Inlet Pressure Sensor harness connector.

      Is the resistance above 100 ohms?

      Yes 

      • Go to step  10

      No 

  10. (K857) 5 VOLT SUPPLY CIRCUIT OPEN OR HIGH RESISTANCE 
    Fig 8: Checking 5-Volt Supply Circuit
    GC0103571Courtesy of CHRYSLER LLC
    NOTE: When checking circuits at the Powertrain Control Module (PCM), be careful not to damage or distort the connector terminals. Improper measurement technique could result in poor pin to terminal contact.
    1. Measure the resistance of the (K857) 5 Volt Supply circuit between the Throttle Inlet Pressure Sensor harness connector and the Powertrain Control Module (PCM) harness connector.

      Is the resistance below 5.0 ohms?

      Yes 

      • Go to step  12

      No 

  11. THROTTLE INLET PRESSURE SENSOR 
    1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Throttle Inlet Pressure Sensor and the Powertrain Control Module (PCM).
    2. Look for any chafed, pierced, pinched, or partially broken wires.
    3. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the related connectors.
    4. Monitor the scan tool data relative to this circuit and wiggle test the wiring and connectors.
    5. Look for the data to change or for the DTC to reset during the wiggle test.
    6. Refer to any Technical Service Bulletins that may apply.

      Were any problems found?

      Yes 

      No 

  12. POWERTRAIN CONTROL MODULE (PCM) 
    1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Throttle Inlet Pressure Sensor and the Powertrain Control Module (PCM).
    2. Look for any chafed, pierced, pinched, or partially broken wires.
    3. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the related connectors.
    4. Monitor the scan tool data relative to this circuit and wiggle test the wiring and connectors.
    5. Look for the data to change or for the DTC to reset during the wiggle test.
    6. Refer to any Technical Service Bulletins that may apply.

      Were any problems found?

      Yes 

      No 

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