Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSDODGE AND RAM2024PROMASTER 3500 BASE, CUTAWAYREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTENTERTAINMENT SYSTEMSGLOBAL TELEMATICS BOX MODULE - DTCS B1401-11 TO B1560-11DTC TROUBLESHOOTINGB1552-13 EMERGENCY CALL BUTTON-CIRCUIT OPENDIAGNOSTIC TEST

2024 Dodge and Ram ProMaster 3500 Base, Cutaway

Diagnostic Test

2024 Dodge and Ram ProMaster 3500 Base, CutawaySECTION Diagnostic Test

CHECK FOR AN ACTIVE DTC
NOTE:
Verify the connection of the Inside Rearview Mirror harness connector.
1. With the scan tool, read Global Telematics Box Module (TBM2) DTCs and record on the repair order.
2. With the scan tool, erase DTCs.
3. With the scan tool, read TBM2 DTCs.
  Did the DTC return?
  
  Yes
  - Go To Next Step
  No
  - Perform the TESTING FOR AN INTERMITTENT CONDITION procedure. Refer to TESTING FOR AN INTERMITTENT CONDITION .
CHECK THE OVERHEAD CONSOLE SWITCH EMERGENCY ASSIST BUTTON
1. Turn the ignition off.
2. Disconnect the Inside Rearview Mirror harness connector
3. Connect a jumper wire between the (X800) Emergency Response circuit and the (X805) Emergency Switch Return circuit at the Inside Rearview Mirror harness connector.
4. Turn the ignition on.
5. With the scan tool, read TBM2 DTCs.
  NOTE:
  B1552-11-EMERGENCY CALL BUTTON- CIRCUIT SHORTED TO GROUND should display as active as a result of this test.
  
  Does the scan tool display: B1552-13-EMERGENCY CALL BUTTON-CIRCUIT OPEN as active?
  
  Yes
  - Go To Next Step
  No
  - Replace the Overhead Console Switch Emergency Assist Button in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST or BODY VERIFICATION TEST (EV) .
CHECK THE (X800) EMERGENCY COMMUNICATION BUTTON SUPPLY CIRCUIT FOR AN OPEN
1. Turn the ignition off.
2. Disconnect the TBM2 C1 harness connector.
3. Measure the resistance of the (X800) Emergency Response circuit between the TBM2 C1 harness connector and Inside Rearview Mirror harness connectors.
  Is the resistance below 3.0 Ohms?
  
  Yes
  - Go To Next Step
  No
  - Repair the (X800) Emergency Response circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST or BODY VERIFICATION TEST (EV) .
CHECK RELATED HARNESS CONNECTIONS
1. Disconnect all TBM2 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 TBM2 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 Environmental Data, 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 TBM2 DTCs.
  Did the DTC return?
  
  Yes
  - Replace the TBM2 in accordance with the Service information. Refer to MODULE, GLOBAL TELEMATICS BOX, REMOVAL AND INSTALLATION .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST or BODY VERIFICATION TEST (EV) .
  No
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST or BODY VERIFICATION TEST (EV) .
  - Test complete.

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.