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Home >> Dodge and Ram >> 2023 >> ProMaster 2500 >> Repair and Diagnosis >> Accessories & Equipment >> Infotainment >> Radio Frequency Module (RF Hub) - DTCS B1001-21 To B1045-01 >> DTC Troubleshooting >> B1035-01 Button Pressed - General Electrical Failure >> Diagnostic Test

Diagnostic Test

  1. CHECK FOR AN ACTIVE DTC 
    1. With the scan tool, read RF Hub DTCs and record on the repair order.
    2. Turn the ignition to the Lock position.
    3. Try to start the engine and allow to run for 30 seconds.
    4. Turn the ignition off and then back on.
    5. With the scan tool, read RF Hub DTCs.

      Is the DTC active?

      Yes 

      • Go To  2

      No 

  2. CHECK THE (D122) SECURITY K LINE COMMUNICATION CIRCUIT FOR AN OPEN 
    1. Turn the ignition off.
    2. Disconnect the Keyless Ignition Node harness connector.
    3. Measure the voltage between ground and the (D122) Security K Line Communication circuit at the Keyless Ignition Node harness connector.

      Is the voltage above 12.0 volts?

      Yes 

      • Go To  3

      No 

      • Repair the (D122) Security K Line Communication circuit for an open.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  3. CHECK THE (G201) IGNITION SWITCH POSITION SIGNAL CIRCUIT OR THE (K817) RUN/START RELAY CONTROL (IF EQUIPPED) FOR A SHORT TO GROUND 
    1. Disconnect the RF Hub C1 connector.
    2. Check for continuity between ground and the Ignition Switch Position Signal circuit or the Run/Start Relay Control circuit at the Keyless Ignition Node harness connector.

      Is there continuity between ground and the Ignition Switch Position Signal circuit?

      Yes 

      • Repair the Ignition Switch Position Signal circuit for a short to ground.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .

      No 

      • Go To  4
  4. CHECK THE (G201) IGNITION SWITCH POSITION SIGNAL CIRCUIT OR THE (K817) RUN/START RELAY CONTROL (IF EQUIPPED) FOR A SHORT TO VOLTAGE 
    1. Measure the voltage between ground and the Ignition Switch Position Signal circuit at the Keyless Ignition Node harness connector.

      Is there any voltage present?

      Yes 

      • Repair the Ignition Switch Position Signal circuit for a short to voltage.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .

      No 

      • Go To  5
  5. CHECK THE KEYLESS IGNITION NODE (KIN) GROUND CIRCUIT FOR HIGH RESISTANCE BY LOAD TESTING THE CIRCUIT 
    1. Disconnect the component harness connector to isolate the ground circuit.
    2. Connect the positive lead of the load test tool to the positive side of the Battery.
    3. Connect the negative lead of the load test tool to the ground circuit at the component harness connector (A). Note:  refer to the diagram below.
    4. The bulb on the load test tool should be illuminated and bright if there is no resistance in the circuitry.
      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 of current. 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 STANDARD PROCEDURE .

      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. To perform a proper load test of a circuit, the tool being used should draw more than approximately 0.75 amps.

      NOTE:

      Why perform a Voltage Drop Test:  To verify with certainty there is not any resistance in the circuit being tested, perform a simple voltage drop test across the 3156 bulb of the load test tool. To do so perform the following:

      • 1. 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.
      • 2. Compare the voltage drop across the bulb to the voltage reading across the Battery terminals.
      • 3. 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 being tested 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. 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 STANDARD PROCEDURE .

      GC0174957Courtesy of CHRYSLER GROUP, LLC
      NOTE:

      When probing a circuit at an Electronic Control Unit (ECU) harness connector, always use an appropriate back probing tool to prevent any possible damage to the ECU terminals.

      NOTE:

      Compare the brightness of the bulb in the load test tool to that of a direct connection to Battery.

      Is the load test bulb illuminated and bright?

      Yes 

      • Replace the Keyless Ignition Node (KIN) in accordance with the Service Information.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .

      No 

      • Repair the (Z906) ground circuit for an open or high resistance.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
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