For years, automotive enthusiasts and DIY mechanics have relied on OBD2 (On-Board Diagnostics II) scanners to troubleshoot modern vehicles. But what about older cars with OBD1 systems? If you own a classic Chrysler vehicle, you might think advanced diagnostics are out of reach without specialized, expensive equipment. However, there’s a clever solution that bridges the gap: using an Actron Obd2 Model Cable with your existing OBD2 scanner to access the diagnostic capabilities of your OBD1 Chrysler.
Many owners of older Chrysler vehicles, like Jeep Comanches, are familiar with the key cycling trick to retrieve basic fault codes. While this method offers a starting point, it’s quite limited. The Actron CP9129 Chrysler adapter cable offers a significant upgrade when paired with an Actron 9145 OBD2 scanner (or similar models). This combination allows you to do much more than just read generic codes.
By connecting the Actron OBD2 model cable to the diagnostic port near your Chrysler’s ECU (Electronic Control Unit), you unlock a range of diagnostic features previously only accessible with specialized tools. Users have reported that with this setup, they can perform various tests and checks, including:
- Battery Temperature Monitoring: Get real-time data on your battery’s temperature.
- Charging Voltage Analysis: Assess your vehicle’s charging system performance.
- A/C Clutch Relay Operation Test: Verify the functionality of your air conditioning clutch relay.
- Brake Switch Operation Check: Confirm proper operation of your brake switch.
- Actuator Tests: Evaluate ECU-controlled relay operation for various systems.
- Idle Speed Test: Control and vary engine RPM for diagnostic purposes.
- Closed/Open Loop Simulation: Analyze engine performance under different operating modes.
- ASD Relay Operation & Shutdown Voltage: Test the Automatic Shutdown relay and voltage.
- Sensor Output Voltage Tests: Measure voltage output from crucial sensors like IAT (Intake Air Temperature), CPS (Crankshaft Position Sensor), AIT (Ambient Intake Temperature), and MAP (Manifold Absolute Pressure) sensors.
The Actron scanner, when used with the Actron OBD2 model cable, requires you to select the specific Chrysler vehicle year and engine from a menu. These menus often extend back to 1989, suggesting broad compatibility for Chrysler vehicles equipped with a 6-pin diagnostic connector. Adapter cables are also available for older Ford and GM vehicles, expanding the versatility of your OBD2 scanner even further.
It’s important to note a limitation: Renix systems, found in some older Jeep models, typically do not utilize this 6-pin connector and are not compatible with the Actron OBD2 model cable and scanner combination for advanced diagnostics. Renix systems often require dealership-level DRB analyzers with specific Renix interface cards.
In conclusion, for owners of compatible OBD1 Chrysler vehicles, investing in an Actron CP9129 Chrysler adapter cable to use with your Actron 9145 OBD2 scanner can be a cost-effective way to gain significantly enhanced diagnostic capabilities. It goes beyond basic code reading, offering a range of valuable tests and data points to aid in troubleshooting and maintaining your classic vehicle.
