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.

DTC IS ACTIVE
NOTE: Diagnose and repair any Throttle Inlet Pressure or Barometric Pressure DTCs before proceeding 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
  - Perform the CHECKING FOR AN INTERMITTENT DTC diagnostic procedure. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
CHECKING THE BAROMETRIC PRESSURE SENSOR
NOTE: The Barometric Pressure Sensor is internal to the PCM.

NOTE: The Barometric Pressure should be approximately equal to the actual barometric pressure. If necessary, compare the Barometric Pressure value of the tested vehicle to the value of a known good vehicle of a similar make and model.
1. Compare the Barometric Pressure of the tested vehicle to the value of a known good vehicle of a similar make and model.
  Is the Barometric Pressure value of the tested vehicle equal to the value of the know good vehicle (plus or minus 2%)?
  
  Yes
  - Go to step 3
  No
  - Go to step 16
(K857) 5-VOLT SUPPLY CIRCUIT VOLTAGE

Fig 1: Checking 5-Volt Supply Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Throttle Inlet Pressure Sensor harness 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 of a volt).
  
  Is the voltage displayed as described above?
  
  Yes
  - Go to step 4
  No
  - Go to step 11
(K857) 5-VOLT SUPPLY CIRCUIT SHORTED TO THE (K153) TIP SIGNAL CIRCUIT

Fig 2: Checking 5-Volt Supply Circuit
Courtesy of CHRYSLER LLC
1. Disconnect the Powertrain Control Module (PCM) harness connector.
2. Measure the resistance between the (K857) 5-volt Supply circuit and the (K153) TIP Signal circuit in the Throttle Inlet Pressure Sensor harness connector.
  Is the resistance above 100 Ohms?
  
  Yes
  - Go to step 5
  No
  - Repair the (K857) 5-volt Supply circuit for a short to the (K153) TIP Signal circuit.
  - Perform the PCM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
(K153) TIP SIGNAL CIRCUIT SHORTED TO VOLTAGE

Fig 3: Checking TIP Signal Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition on.
2. Measure the voltage of the (K153) TIP Signal circuit in the Throttle Inlet Pressure Sensor harness connector.
  Is there any voltage present?
  
  Yes
  - Repair the (K153) TIP Signal circuit for a short to voltage.
  - Perform the PCM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
  No
  - Go to step 6
(K153) TIP SIGNAL CIRCUIT SHORTED TO GROUND

Fig 4: Checking TIP Signal Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. 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 7
  No
  - Repair the (K153) TIP Signal circuit for a short to ground.
  - Perform the PCM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
(K153) TIP SIGNAL CIRCUIT SHORTED TO THE (K152) TIP RETURN CIRCUIT

Fig 5: Checking TIP Signal Circuit
Courtesy 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 8
  No
  - Repair the (K153) TIP Signal circuit for a short to the (K152) TIP Return circuit.
  - Perform the PCM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
(K153) TIP SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE

Fig 6: Checking TIP Signal Circuit
Courtesy 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 9
  No
  - Repair the (K153) TIP Signal circuit for an open circuit or high resistance.
  - Perform the PCM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
(K152) TIP RETURN CIRCUIT OPEN OR HIGH RESISTANCE

Fig 7: Checking TIP Return Circuit
Courtesy 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 10
  No
  - Repair the (K152) TIP Return for an open circuit or high resistance.
  - Perform the PCM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
THROTTLE INLET PRESSURE SENSOR SIGNAL VOLTAGE

Fig 8: Checking TIP Return Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Connect the Powertrain Control Module (PCM) harness connector.
3. Connect a jumper wire between the (K152) TIP Return circuit and the (K153) TIP Signal circuit in the Throttle Inlet Pressure Sensor harness connector.
4. Turn the ignition on.
5. With the scan tool, read the Throttle Inlet Pressure Sensor signal voltage.
  NOTE: The voltage should be 0.0 volts (plus or minus.1 of a volt) with the jumper wire in place.
  
  Is the voltage on the scan tool displayed as described above?
  
  Yes
  - Go to step 15
  No
  - Go to step 16
(K857) 5-VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE

Fig 9: Checking 5-Volt Supply Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Powertrain Control Module (PCM) harness 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.
  Is there any voltage present?
  
  Yes
  - Repair the (K857) 5-volt Supply circuit for a short to voltage.
  - Perform the PCM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
  No
  - Go to step 12
(K857) 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND

Fig 10: Checking 5-Volt Supply Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. 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 13
  No
  - Repair the (K857) 5-volt Supply circuit for a short to ground.
  - Perform the PCM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
(K857) 5-VOLT SUPPLY CIRCUIT SHORTED TO THE (K152) TIP RETURN CIRCUIT

Fig 11: Checking 5-Volt Supply Circuit
Courtesy 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 14
  No
  - Repair the (K857) 5-volt Supply circuit for a short to the (K152) TIP Return circuit.
  - Perform the PCM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
(K857) 5-VOLT SUPPLY CIRCUIT OPEN OR HIGH RESISTANCE

Fig 12: Checking 5-Volt Supply Circuit
Courtesy 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 16
  No
  - Repair the (K857) 5-volt Supply circuit for an open circuit or high resistance.
  - Perform the PCM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
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. Perform any Technical Service Bulletins that may apply.
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the PCM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
  No
  - Replace the Throttle Inlet Pressure Sensor.
  - Perform the PCM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
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.
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. Perform any Technical Service Bulletins that may apply.
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the PCM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
  No
  - Replace the Powertrain Control Module (PCM) in accordance with the Service Information.
  - Perform the PCM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .