how to diagnose C0220 code in Ram 1500 DT (2019-Present) ABS module

Learn how to diagnose and fix C0220 ABS module issues in Ram 1500 DT. Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Solution

1. Preparation

• Gather all necessary tools and parts.
• Park the vehicle on a level surface and engage the parking brake.
• Disconnect the battery (negative terminal) to ensure safety during repairs.

2. Inspect Wheel Speed Sensors

• Tools Required: Socket set, multimeter
• Remove the wheel and tire assembly to access the wheel speed sensors.
• Disconnect the electrical connector from the wheel speed sensor.
• Use the multimeter to measure sensor resistance; it should typically be between 800-1200 ohms (refer to the service manual for exact specifications).
• If resistance is outside specifications, replace the wheel speed sensor.

3. Check Wiring and Connectors

• Visually inspect the wiring harness for signs of wear, pinching, or damage.
• Ensure all connectors are clean and secure; clean any corrosion with electrical contact cleaner.
• Use a multimeter to check for continuity in the harness between the ABS module and the wheel speed sensors. Repair any broken or shorted wires.

4. Test ABS Module Power and Ground

• Tools Required: Multimeter
• Locate the ABS module and check the power and ground connections.
• Measure the voltage at the power terminal with the ignition on; it should be within the specifications (usually 12V).
• Check the ground connection for continuity to ensure a good ground. Repair as necessary.

5. Reconnect and Clear Codes

• Reconnect the battery and clear the C0220 code using the OBD-II scanner.
• Start the vehicle and observe if the ABS warning light returns.