Connecting a Smarty programmer to your truck can sometimes be tricky. One common question is whether you can use an OBDII scanner while the Smarty is connected. While technically possible, it’s generally not recommended as it can interfere with the programming process. This article focuses on troubleshooting common Smarty connection problems, specifically addressing a scenario with a Smarty S06 PoD on a 2003-2007 Dodge truck.
Understanding the Problem: Smarty Won’t Connect
The primary issue is the Smarty S06 failing to connect to the truck. The programmer continuously cycles through the ignition on/off prompts without initiating the reprogramming process. MADS/Smarty suggests potential causes include insufficient voltage at the ECM (12.6v+ required), corrosion in the OBDII port, wiring issues between the OBDII port and the ECM, or a faulty ECM.
Adding to the complexity, an Edge CTS Monitor experiences communication issues with the truck, resorting to a default monitoring mode with limited functionality. Edge tech support confirmed communication problems after attempting various Dodge protocols. The CTS screen occasionally flickers, potentially indicating an underlying electrical issue.
Initial Troubleshooting Steps
Several preliminary checks have already been performed:
- OBDII Port Inspection: Both visual inspection and a check by another forum member confirmed no visible corrosion or wiring issues within the OBDII port itself. All pins appear to be in good condition.
- AutoZone OBDII Scan: AutoZone successfully connected their scanner to the truck, retrieving vehicle information and confirming no error codes. This suggests the OBDII port is fundamentally functional.
- Truck Functionality: The truck runs without issues, no check engine light, and no reported performance problems. The previous owner confirmed no prior programming or ECM modifications.
Further Diagnostic Steps
Given the initial findings, the problem likely lies beyond the OBDII port itself. Consider these next steps:
1. Voltage Check:
- Battery Voltage: Verify the battery voltage is at least 12.6 volts with the engine off. A weak battery can cause communication issues.
- ECM Voltage: Measure the voltage directly at the ECM’s power and ground pins while attempting to connect the Smarty. This confirms adequate voltage supply to the ECM. A wiring diagram for your specific truck model will be necessary to identify the correct pins.
2. Wiring Harness Inspection:
- Visual Inspection: Thoroughly inspect the wiring harness between the OBDII port and the ECM for any damage, chafing, or loose connections. Pay close attention to areas where the harness might rub against other components.
- Continuity Test: Use a multimeter to test the continuity of each wire in the OBDII connector to its corresponding pin at the ECM connector. This identifies any broken or damaged wires within the harness.
3. Ground Connections:
- ECM Ground: Check the ECM ground connection for tightness and cleanliness. A poor ground can disrupt communication. Consult your truck’s wiring diagram to locate the ECM ground.
- Chassis Ground: Inspect the main chassis ground connections for corrosion or looseness. A poor chassis ground can affect the entire electrical system.
4. Advanced Diagnostics:
- Professional Scan Tool: Utilize a professional-grade scan tool capable of deeper diagnostics and communication with the ECM. This might reveal more specific error codes or communication failures not detected by basic OBDII scanners.
Conclusion
Troubleshooting Smarty connection issues requires a systematic approach. While using an OBDII scanner alongside the Smarty is generally discouraged, focusing on voltage, wiring, and grounding issues is crucial. If these steps don’t resolve the problem, consulting a qualified automotive technician with experience in vehicle electronics and programming is recommended. They can perform more advanced diagnostics and potentially identify issues with the ECM itself.
