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Home >> Dodge and Ram >> 2023 >> ProMaster 2500 >> Repair and Diagnosis >> Accessories & Equipment >> Infotainment >> Radio Frequency Module (RF Hub) - DTCS B1045-11 To U1703-86 >> DTC Troubleshooting >> B1054-13 Brake Pedal Switch - Circuit Open >> Diagnostic Test

Diagnostic Test

  1. CHECK FOR AN ACTIVE DTC 
    1. Turn the ignition on.
    2. With the scan Tool, read and record RF Hub DTCs.

      Is this DTC active?

      Yes 

      • Go To  2

      No 

  2. CHECK THE PCM FOR BRAKE SWITCH DTCS 
    1. With the scan Tool, read and record the ECM/PCM DTCs.

      Does the PCM have an active DTC against the Brake Switch?

      Yes 

      • Go To  4

      No 

      • Go To  3
  3. CHECK THE BRAKE PEDAL AND BRAKE SWITCH STATE 
    1. With the scan Tool, compare the status and change for "pressed/not pressed", while pressing and releasing the brake pedal:
      • The Brake Switch in the RF Hub Data Display-Type Sensors, while pressing and releasing the brake pedal.
      • The Brake Pedal in the ECM/PCM Data Display-Type Sensors.

      Does the status and change found in RF Hub match in the ECM/PCM?

      Yes 

      • Go To  6

      No 

      • Go To  4
  4. CHECK THE CONNECTION AT THE BRAKE PEDAL SWITCH 
    1. Turn the ignition off.
    2. Disconnect the Brake Pedal Switch connector.
    3. Check the connection at the Brake Pedal Switch for the following:
      • Proper connector installation.
      • Damaged connector or locks.
      • Corrosion and other signs of water intrusion.
      • Weather seal damaged (if equipped).
      • Bent or pushed out terminals in the connector.
      • Overheating due to a poor connection (discoloration to the terminal due to excessive current draw).
      • Perform a terminal drag test on each connector terminal to verify proper terminal tension.

      Were any of the above conditions found?

      Yes 

      • Repair any conditions that are found.

      No 

      • Go To  5
  5. CHECK THE (B134) BRAKE SIGNAL 2 CIRCUIT 
    1. Disconnect RF Hub C1 connector
    2. Check the (B134) Brake Signal 2 Circuit for the following:
      • Open
      • High Resistance (above 3.0 ohms)
      • Short To Ground

      Were any of the above conditions found?

      Yes 

      • Repair the (B134) Brake Signal 2 Circuit for damage in accordance with Service Information.

      No 

      • Replace the Brake Pedal Switch.
  6. CHECK RELATED HARNESS CONNECTIONS 
    1. Disconnect all RF Hub harness connectors.
    2. Disconnect all related in-line harness connections (if equipped).
    3. Disconnect the related component harness connectors.
    4. 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.
      • Perform a terminal drag test on each connector terminal to verify proper terminal tension.

      Repair any conditions that are found.

    5. Reconnect all RF Hub Module harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
    6. Reconnect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
    7. Reconnect all related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
    8. With the scan tool, erase DTCs.
    9. Using the recorded Vehicle Scan Report, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
    10. With the scan tool, read RF Hub DTCs.

      Did the DTC return?

      Yes 

      • Replace the Radio Frequency Hub (RF Hub) Module in accordance with the Service Information. Refer to MODULE, RADIO FREQUENCY (RF HUB), REMOVAL .
      • If this vehicle is equipped with a Steering Column Lock Module (BUX), it must also be replaced in accordance with the Service Information. When replacing the RF-Hub and the Steering Column Lock Module, the RF-Hub MUST be programmed BEFORE the Steering Column Lock Module (ELV) is programmed.
      • Replace the Steering Column Lock Module (ELV/ESCL) in accordance with the Service Information.
      • Perform the RADIO FREQUENCY HUB VERIFICATION TEST. Refer to RADIO FREQUENCY (RF HUB) VERIFICATION TEST .

      No 

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