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Diagnostic Test

WARNING: This page is about a different car, the 2016 Dodge Journey and 2015 Dodge Journey. However, it is still accessible from the selected car via links, so may be relevant.
  1. ACTIVE DIAGNOSTIC TROUBLE CODE (DTC) 
    1. Ignition on, engine not running.
      NOTE:

      If the P2100 is intermittent, it is possible that the controller is overheating in extreme hot temperatures and this is considered a normal protection operation. No repair is necessary.

      NOTE:

      Low battery voltage can also cause excessive current draw, in very hot and very cold ambient temperatures. Make sure the battery can pass a load test before continuing.

    2. With the scan tool, read the active DTCs.
    3. Look closely at the temperatures at which this DTC set.

      Is the DTC Active at this time?

      Yes 

      • Go To  2

      No 

  2. THROTTLE PLATE INSPECTION 
    1. Turn the ignition off.
    2. Remove the Air Cleaner Assembly from the Throttle Body. Refer to BODY, AIR CLEANER, REMOVAL .
    3. Check for any signs of a foreign material (ice or dirt) on the Throttle Plate or in the bore causing the Throttle Plate to stick.

      Were any signs of foreign material or scoring of the throttle plate or bore found?

      Yes 

      • Remove the debris if possible or replace the Throttle Body Assembly. Refer to THROTTLE BODY, REMOVAL . Disconnect the Battery when replacing the Throttle Body Assembly. After installation is complete, use a scan tool and select the ETC RELEARN function.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST . .

      No 

      • Go To  3
  3. (K124) ETC POSITIVE CIRCUIT SHORTED TO VOLTAGE 
    Fig 1: Checking ETC Positive Circuit For Short To Voltage
    GC0150199Courtesy of CHRYSLER GROUP, LLC
    1. Turn the ignition off.
    2. Disconnect the Throttle Body harness connector.
    3. Disconnect the PCM C2 harness connector.
    4. Ignition on, engine not running.
    5. Measure the voltage on the (K124) ETC Positive circuit at the Throttle Body harness connector.

      Is there any voltage present?

      Yes 

      • Repair the short to voltage on the (K124) ETC Positive circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST . .

      No 

      • Go To  4
  4. (K126) ETC NEGATIVE CIRCUIT SHORTED TO VOLTAGE 
    Fig 2: Checking ETC Negative Circuit For Short To Voltage
    GC0150200Courtesy of CHRYSLER GROUP, LLC
    1. Measure the voltage on the (K126) ETC Negative circuit at the Throttle Body harness connector.

      Is there any voltage present?

      Yes 

      • Repair the short to voltage in the (K126) ETC Negative circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST . .

      No 

      • Go To  5
  5. (K124) ETC POSITIVE CIRCUIT SHORTED TO THE (K126) ETC NEGATIVE CIRCUIT 
    Fig 3: Checking ETC Positive Circuit For Short To ETC Negative Circuit
    GC0150201Courtesy of CHRYSLER GROUP, LLC
    1. Turn the ignition off.
    2. Measure the resistance between the (K124) ETC Positive circuit and the (K126) ETC Negative circuit at the Throttle Body harness connector.

      Is the resistance below 100 Ohms?

      Yes 

      • Repair the short to between the (K124) ETC Positive circuit and the (K126) ETC Negative circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST . .

      No 

      • Go To  6
  6. (K124) ETC POSITIVE CIRCUIT OPEN 
    Fig 4: Checking ETC Positive Circuit For Open
    GC0150202Courtesy of CHRYSLER GROUP, LLC
    1. Measure the resistance of the (K124) ETC Positive circuit from the Throttle Body harness connector to the PCM C2 harness connector.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Go To  7

      No 

  7. (K124) ETC POSITIVE CIRCUIT SHORTED TO GROUND 
    Fig 5: Checking ETC Positive Circuit For Short To Ground
    GC0150203Courtesy of CHRYSLER GROUP, LLC
    1. Measure the resistance between ground and the (K124) ETC Positive circuit at the Throttle Body harness connector.

      Is the resistance below 100 Ohms?

      Yes 

      • Repair the short to ground in the (K124) ETC Positive circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST . .

      No 

      • Go To  8
  8. (K126) ETC NEGATIVE CIRCUIT OPEN 
    Fig 6: Checking ETC Negative Circuit For Open
    GC0150204Courtesy of CHRYSLER GROUP, LLC
    1. Measure the resistance of the (K126) ETC Negative circuit from the Throttle Body harness connector to the PCM C2 harness connector.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Go To  9

      No 

  9. (K126) ETC NEGATIVE CIRCUIT SHORTED TO GROUND 
    Fig 7: Checking ETC Negative Circuit For Short To Ground
    GC0150205Courtesy of CHRYSLER GROUP, LLC
    1. Measure the resistance between ground and the (K126) ETC Negative circuit at the Throttle Body harness connector.

      Is the resistance below 100 Ohms?

      Yes 

      • Repair the short to ground in the (K126) ETC Negative circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST . .

      No 

      • Go To  10
  10. ETC MOTOR 
    Fig 8: Measuring Resistance Of ETC Motor At PCM C2 Harness Connector
    GC0150206Courtesy of CHRYSLER GROUP, LLC
    1. Reconnect the Throttle Body harness connector.
    2. Measure the resistance of the ETC Motor between the (K124) ETC Positive circuit and the (K126) ETC Negative circuit at the PCM C2 harness connector.

      Is the resistance between 2.5 and 25 Ohms at closed throttle?

      Yes 

      • Go To  11

      No 

      • Replace the Throttle Body Assembly. Refer to THROTTLE BODY, REMOVAL . Disconnect the Battery when replacing the Throttle Body Assembly. After installation is complete, use a scan tool and select the ETC RELEARN function.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST . .
  11. POWERTRAIN CONTROL MODULE (PCM) 
    1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Throttle Body 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 Throttle Body and Powertrain Control Module connectors.
    4. Perform any Technical Service Bulletins that may apply.

      Were there any problems found?

      Yes 

      No 

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