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.

SYS.OK|MANUAL.DB● LIVE

HOMESERVICE MANUALSDODGE AND RAM2023PROMASTER 3500 VAN CARGOREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTCOLLISION/AVOIDANCE(LEFT BLIND SPOT SENSOR MODULE (BSM) (LBSS) - ELECTRICAL DIAGNOSTICS)DTC TROUBLESHOOTINGC2008-64-ENGINE1.REVERSEGEARSTS - SIGNAL PLAUSIBILITY FAILUREDIAGNOSTIC TEST

2023 Dodge and Ram ProMaster 3500 Van Cargo

Diagnostic Test

2023 Dodge and Ram ProMaster 3500 Van CargoSECTION Diagnostic Test

CHECK FOR AN ACTIVE DTC
1. With the scan tool, read LBSS DTCs and record on the repair order.
2. With the scan tool, erase DTCs.
3. Cycle the ignition from on to off, wait five seconds and then back to on.
4. With the scan tool, read LBSS DTCs.
  Did the DTC return?
  
  Yes
  - Go To 2
  No
  - Perform the TESTING FOR AN INTERMITTENT CONDITION procedure. Refer to TESTING FOR AN INTERMITTENT CONDITION.
CHECK THE CAN CIRCUITS FROM THE LBSS TO THE BCM
1. Turn the ignition off.
2. Disconnect the LBSS Module harness connector and the BCM harness connector.
3. Check the CAN circuits for opens or shorts.
  Are there any circuits shorted or open?
  
  Yes
  - Repair the CAN circuits that are open or shorted.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST.
  No
  - Go To 3
CHECK BCM AND LBSS HARNESS CONNECTORS
1. Check the LBSS and BCM harness connectors.
  Are there any problems with the harness connectors?
  
  Yes
  - Restore the correct function of the connector.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST.
  No
  - Go To 4
CHECK THE BCM POWER SUPPLY CIRCUITS
1. Turn the ignition off.
2. Disconnect the BCM harness connector.
3. Check the BCM power supply circuits with a test light.
  Does the test light illuminate brightly?
  
  Yes
  - Go To 5
  No
  - Repair the BCM Power supply circuits.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST.
CHECK THE LBSS POWER SUPPLY CIRCUITS
1. Turn the ignition off.
2. Disconnect the LBSS harness connector.
3. Check the LBSS power supply circuits with a test light.
  Does the test light illuminate brightly?
  
  Yes
  - Go To 6
  No
  - Repair the LBSS Power supply circuits.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST.
CHECK THE BCM FUNCTIONALITY
1. Check for proper operation of the BCM.
  Does the BCM operate correctly?
  
  Yes
  - Go To 7
  No
  - Replace the BCM.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST.
CHECK THE LBSS FUNCTIONALITY
1. Check for proper operation of the LBSS.
  Does the LBSS operate correctly?
  
  Yes
  - Test complete.
  No
  - Replace and program the Left Blind Spot Sensor (LBSS) in accordance with the Service Information. Refer to SENSOR, BLIND SPOT, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST.

RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready Tools Free Quote Check Quote Shield Pro

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.