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Diagnostic Test

WARNING: This page is about a different variant/trim than selected.
  1. ACTIVE DIAGNOSTIC TROUBLE CODE (DTC) 
    1. Ignition on, engine not running.
    2. With the scan tool, read the active DTCs.

      Is the DTC Active at this time.

      Yes 

      • Go To  2.

      No 

      • Refer to STANDARD PROCEDURE and perform the INTERMITTENT CONDITION diagnostic procedure.
  2. (K856) 5-VOLT SUPPLY CIRCUIT 
    Fig 1: Checking 5-Volt Supply Circuit Voltage
    GC0090648Courtesy of CHRYSLER GROUP, LLC
    1. Turn the ignition off.
    2. Disconnect the MAP Sensor harness connector.
    3. Ignition on, engine not running.
    4. Measure the voltage on the (K856) 5-Volt Supply circuit in the MAP Sensor harness connector.

      Is the voltage between 4.5 to 5.2 Volts?

      Yes 

      • Go To  3.

      No 

      • Go To  7.
  3. MAP SENSOR 
    1. With the scan tool, monitor the MAP Sensor voltage with the Sensor harness connector disconnected.

      Is the voltage above 2.2 Volts?

      Yes 

      • Verify that there is good pin to terminal contact in the MAP Sensor and Powertrain Control Module connectors. If OK, replace the MAP Sensor in accordance with the service information. Refer to SENSOR, MANIFOLD AIR PRESSURE (MAP), REMOVAL .
      • Refer to STANDARD PROCEDURE and perform the POWERTRAIN VERIFICATION TEST.

      No 

      • Go To  4.
  4. (K1) MAP SIGNAL CIRCUIT OPEN 
    Fig 2: Checking MAP Signal Circuit For Open
    GC0150090Courtesy of CHRYSLER GROUP, LLC
    1. Turn the ignition off.
    2. Disconnect the PCM C2 harness connector.
    3. Measure the resistance of the (K1) MAP Signal circuit from the MAP Sensor harness connector to the PCM C2 harness connector.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Go To  5.

      No 

      • Repair the open in the (K1) MAP Signal circuit.
      • Refer to STANDARD PROCEDURE and perform the POWERTRAIN VERIFICATION TEST.
  5. (K1) MAP SIGNAL CIRCUIT SHORTED TO THE (K900) SENSOR GROUND CIRCUIT 
    Fig 3: Checking MAP Signal Circuit For Short To Sensor Ground Circuit
    GC0090650Courtesy of CHRYSLER GROUP, LLC
    1. Measure the resistance between the (K900) Sensor ground circuit and the (K1) MAP Signal circuit in the MAP Sensor harness connector.

      Is the resistance below 100 Ohms?

      Yes 

      • Repair the short between the (K900) Sensor ground circuit and the (K1) MAP Signal circuit.
      • Refer to STANDARD PROCEDURE and perform the POWERTRAIN VERIFICATION TEST.

      No 

      • Go To  6.
  6. (K1) MAP SIGNAL CIRCUIT SHORTED TO GROUND 
    Fig 4: Checking MAP Signal Circuit For Short To Ground
    GC0101910Courtesy of CHRYSLER GROUP, LLC
    1. Measure the resistance between ground and the (K1) MAP Signal circuit in the MAP Sensor harness connector.

      Is the resistance below 100 Ohms?

      Yes 

      • Repair the short to ground in the (K1) MAP Signal circuit.
      • Refer to STANDARD PROCEDURE and perform the POWERTRAIN VERIFICATION TEST.

      No 

      • Go To  10.
  7. (K856) 5-VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE 
    Fig 5: Checking 5-Volt Supply Circuit Voltage
    GC0090648Courtesy of CHRYSLER GROUP, LLC
    1. Turn the ignition off.
    2. Disconnect the C1 PCM harness connector.
    3. Ignition on, engine not running.
    4. Measure the voltage on the (K856) 5-Volt Supply circuit in the MAP Sensor harness connector.

      Is there any voltage present?

      Yes 

      • Repair the short to voltage in the (K856) 5-Volt Supply circuit.
      • Refer to STANDARD PROCEDURE and perform the POWERTRAIN VERIFICATION TEST.

      No 

      • Go To  8.
  8. (K856) 5-VOLT SUPPLY CIRCUIT OPEN 
    Fig 6: Checking 5-Volt Supply Circuit For Open
    GC0150089Courtesy of CHRYSLER GROUP, LLC
    1. Turn the ignition off.
    2. Measure the resistance of the (K856) 5-Volt Supply circuit from the MAP Sensor harness connector to the PCM C2 harness connector.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Go To  9.

      No 

      • Repair the open in the (K856) 5-Volt Supply circuit.
      • Refer to STANDARD PROCEDURE and perform the POWERTRAIN VERIFICATION TEST.
  9. (K856) 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND 
    Fig 7: Checking MAP Sensor 5-Volt Supply Circuit For Short To Ground
    GC0101913Courtesy of CHRYSLER GROUP, LLC
    1. Measure the resistance between ground and the (K856) 5-Volt Supply circuit in the MAP Sensor harness connector.

      Is the resistance below 100 Ohms?

      Yes 

      • Repair the short to ground in the (K856) 5-Volt Supply circuit.
      • Refer to STANDARD PROCEDURE and perform the POWERTRAIN VERIFICATION TEST.

      No 

      • Go To  10.
  10. POWERTRAIN CONTROL MODULE (PCM) 
    1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the MAP 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 MAP Sensor and Powertrain Control Module connectors.
    4. Perform any Technical Service Bulletins that may apply.

      Were there any problems found?

      Yes 

      • Repair as necessary.
      • Refer to STANDARD PROCEDURE and perform the POWERTRAIN VERIFICATION TEST.

      No 

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