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Home >> Jeep >> 2024 >> Wagoneer Carbide, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 38 (3.0L - DTCS P05DA-00 To P0617-00) >> DTC Troubleshooting >> P0617-00-Starter Control Circuit High >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2024 Jeep Grand Wagoneer L and 2024 Jeep Grand Wagoneer. However, it is still accessible from the selected car via links, so may be relevant.
  1. READ AND RECORD DTCS AND ENVIRONMENTAL DATA - ERASE DTCS AND CHECK FOR THE DTC TO RETURN 
    1. With the scan tool, read DTCs in all Electronic Control Units (ECUs) and record on the repair order.
    2. For future reference, with the scan tool, run and save a vehicle Scan Report and all related recorded data.
    3. With the scan tool, erase all DTCs.
    4. Turn the ignition off for a minimum of 10.0 seconds.
    5. Turn the ignition on.
    6. Using the When Monitored and Set Conditions above and recorded data, operate the vehicle in the conditions that set the DTC.
    7. With the scan tool, read DTCs.

      Did the DTC return?

      Yes 

      • Go To  2

      No 

  2. CHECK THE STARTER RELAY AND PDC FOR PROPER OPERATION 
    1. Using a 12-volt test light connected to Fused B+, back probe the Starter Relay (K8) Control circuit at the PDC C1 connector.
      NOTE:

      The relay should make an audible click when closing.

    2. Check for voltage on the Starter Relay (T753) Output circuit at the PDC C1 connector to determine if the relay is closing if a click is not heard.

      Does the Starter Relay close when the control circuit is connected to Fused B+?

      Yes 

      • Go To  3

      No 

      • Go To  6
  3. CHECK THE STARTER RELAY (K8) CONTROL CIRCUIT FOR HIGH RESISTANCE BY LOAD TESTING THE CIRCUIT 
      NOTE:

      Note: Why load test a circuit?  A load test is used to determine if a circuit is capable of carrying the amperage needed to perform properly. The 3156 bulb in the load tool illustrated, is a simple but effective method of testing circuit functionality. A 3156 Bulb has approximately 6.0 Ohms of resistance when the bulb is powered  and draws approximately 2.0 amps. Read the CIRCUIT LOAD TESTING PROCEDURE for information on building a simple load test tool and for additional load testing information and alternative methods of load testing or voltage drop testing a circuit. Refer to CIRCUIT LOAD TESTING PROCEDURES .

      NOTE:

      Note:  A 12-volt test light can be substituted for the load test tool, but only  if the test light draws enough current to effectively load test the circuit. Many high impedance test lights draw very little amperage (less than 0.1 amps) and are not reliable to load test a circuit.

      NOTE:

      Note:  Perform a Voltage Drop Test across the 3156 bulb of the load test tool to verify with certainty there is no resistance in the circuit being tested. To do so perform the following:

      • Connect the leads of a DVOM to the alligator clips on the load test tool while the load test tool is connected in series with the circuit.
      • Compare the voltage drop across the bulb to the voltage reading across the Battery terminals.
      • The voltage dropped across the bulb should be equal to the voltage reading across the Battery terminals if there is no resistance in the circuit being tested.

        • Example:  2.0 Ohms of resistance in the circuit will cause the voltage measurement across the bulb to be 25% less than when compared to Battery voltage. The reason for this is that the 2.0 Ohms in the circuit makes up 25% of the total circuit resistance of 8.0 Ohms.

    2. Turn the ignition off when performing the load test on the circuit.
    3. Remove the 12-volt test light.
    4. Disconnect the PDC C1 connector harness connector.
    5. Disconnect the appropriate PCM harness connector. Do not disconnect any in-line harness connectors at this time.
    6. Connect the (special tool #2064100081, Kit, Electrical Test Lead) to the appropriate terminal in the PCM harness connector.
    7. Connect the positive lead of the load test tool to the positive side of the Battery (A). Note:  Refer to the example illustration below as an example of how to connect the load test tool.
    8. Connect the negative lead of the load test tool to the electrical test lead tool connected to the relay socket (B).
    9. Connect a jumper between the negative side of the Battery or a known good ground and the Starter Relay (K8) Control circuit at the PCM harness connector (C and D).
    10. The bulb on the load test tool should be illuminated and bright if there is no resistance in the circuit.
      NOTE:

      The bulb on the load test tool should be illuminated and bright if there is no resistance in the circuitry. Compare the brightness of the bulb in the load test tool to that of a direct connection to Battery.

      GC0174938Courtesy of CHRYSLER GROUP, LLC
      NOTE:

      Read the CIRCUIT LOAD TESTING PROCEDURE for information on building a simple load test tool and for additional load testing information and alternative methods of load testing or voltage drop testing a circuit. Refer to CIRCUIT LOAD TESTING PROCEDURES .

      CAUTION:

      Do not load test any circuits with components still connected to the circuit.

      Is the load test bulb illuminated and bright?

      Yes 

      • Go To  4

      No 

      • Repair the Starter (K8) Control circuit for an open or short to ground.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  4. ISOLATE AND CHECK THE STARTER RELAY (K8) CONTROL CIRCUIT FOR A SHORT TO ANOTHER CIRCUIT 
    1. Turn the ignition off.
    2. Disconnect the PCM C1 harness connector.
    3. Disconnect the PDC harness connector.
    4. Check for continuity between the Starter Relay (K8) Control circuit and all other circuits at the PCM C1 harness connector.

      Is there continuity between the Starter Relay (K8) Control circuit and any other circuit?

      Yes 

      • Repair the Starter Relay (K8) Control circuit for a short to the circuit that showed continuity. Use the wiring diagram as a guide to trace the circuits and look for any in-line connectors to help isolate the location of the short.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

      • Go To  5
  5. CHECK RELATED PCM AND COMPONENT CONNECTIONS 
    1. Perform any Service Bulletins that apply.
    2. Disconnect all PCM harness connectors.
    3. Disconnect all related in-line harness connections (if equipped).
    4. Disconnect the related component harness connectors.
    5. Inspect harness connectors, component connectors, and all male and female terminals for the following conditions:
      • Proper connector installation.
      • Damaged connector locks.
      • Corrosion.
      • Other signs of water intrusion.
      • Weather seal damage (if equipped).
      • Bent terminals.
      • Overheating due to a poor connection (terminal may be discolored due to excessive current draw).
      • Terminals that have been pushed back into the connector cavity.
      • Check for spread terminals and verify proper terminal tension.

      Repair any conditions that are found.

    6. Reconnect all PCM harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
    7. Reconnect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
    8. Reconnect all related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
    9. With the scan tool, erase DTCs.
    10. Test drive or operate the vehicle in accordance with the when monitored and set conditions.
    11. With the scan tool, read DTCs.

      Did the DTC return?

      Yes 

      No 

      • The wiring or poor connection problem has been repaired.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  6. CHECK THE PDC GROUND CIRCUITS FOR AN OPEN/HIGH RESISTANCE BY LOAD TESTING THE CIRCUITS 
      NOTE:

      Note: Why load test a circuit?  A load test is used to determine if a circuit is capable of carrying the amperage needed to perform properly. The 3156 bulb in the load tool illustrated, is a simple but effective method of testing circuit functionality. A 3156 Bulb has approximately 6.0 Ohms of resistance when the bulb is powered  and draws approximately 2.0 amps. Read the CIRCUIT LOAD TESTING PROCEDURE for information on building a simple load test tool and for additional load testing information and alternative methods of load testing or voltage drop testing a circuit. Refer to CIRCUIT LOAD TESTING PROCEDURES .

      NOTE:

      Note:  A 12-volt test light can be substituted for the load test tool, but only  if the test light draws enough current to effectively load test the circuit. Many high impedance test lights draw very little amperage (less than 0.1 amps) and are not reliable to load test a circuit.

      NOTE:

      Note:  Perform a Voltage Drop Test across the 3156 bulb of the load test tool to verify with certainty there is no resistance in the circuit being tested. To do so perform the following:

      • Connect the leads of a DVOM to the alligator clips on the load test tool while the load test tool is connected in series with the circuit.
      • Compare the voltage drop across the bulb to the voltage reading across the Battery terminals.
      • The voltage dropped across the bulb should be equal to the voltage reading across the Battery terminals if there is no resistance in the circuit being tested.

      Example:  2.0 Ohms of resistance in the circuit will cause the voltage measurement across the bulb to be 25% less than when compared to Battery voltage. The reason for this is that the 2.0 Ohms in the circuit makes up 25% of the total circuit resistance of 8.0 Ohms.

    2. Using the wiring information, disconnect the PDC harness connectors to isolate all of the ground circuits connected to the PDC. If the PDC does not have connectors, back probe the ground circuits when testing.
      NOTE:

      There may be multiple ground circuits connected to the PDC through multiple connectors. All of the ground circuits must be tested.

    3. Load test the (Z923) Ground circuits at the PDC harness connectors (A). Note:  Refer to the example illustration below as an example of how to connect the load test tool.
      NOTE:

      The bulb on the load test tool should be illuminated and bright if there is no resistance in the circuitry. Compare the brightness of the bulb in the load test tool to that of a direct connection to Battery.

      GC0174957Courtesy of CHRYSLER GROUP, LLC
      NOTE:

      Read the CIRCUIT LOAD TESTING PROCEDURE for information on building a simple load test tool and for additional load testing information and alternative methods of load testing or voltage drop testing a circuit. Refer to CIRCUIT LOAD TESTING PROCEDURES .

      CAUTION:

      Do not load test any circuits with components still connected to the circuit.

      Is the load test bulb illuminated and bright?

      Yes 

      • Go To  7

      No 

      • Repair the faulty ground circuit for an open or high resistance.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  7. CHECK THE STARTER RELAY (K8) CONTROL CIRCUIT FOR A SHORT TO GROUND 
    1. Disconnect the PCM C1 harness connector.
    2. Check for continuity between ground and the Starter Relay (K8) Control circuit at the PDC harness connector.

      Is there continuity between ground and the Starter Relay (K8) Control circuit?

      Yes 

      • Repair the Starter Relay (K8) Control circuit for a short to ground.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

      • Go To  8
  8. ISOLATE AND CHECK THE STARTER RELAY (K8) CONTROL CIRCUIT FOR A SHORT TO ANOTHER VOLTAGE SUPPLY CIRCUIT 
    1. Turn the ignition off.
    2. Remove the load test tool.
    3. Check for continuity between the Starter Relay (K8) Control circuit and all other circuits at the PCM C1 harness connector.

      Is there continuity between the Starter Relay (K8) Control circuit and any other circuit?

      Yes 

      • Repair the Starter Relay (K8) Control circuit for a short to the circuit that showed continuity. Use the wiring diagram as a guide to trace the circuits and look for any in-line connectors to help isolate the location of the short.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

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