how to fix C1900 code in Ford Explorer Fifth Generation (2011-2019)

Learn how to diagnose and fix C1900 ABS module issues in Ford Explorer (2011-2019). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Solution

1. Preparation

• Tools Required: OBD-II scanner, multimeter, torque wrench, socket set, wiring diagram.
• Safety Warnings: Disconnect the battery before working on electrical systems.

2. Inspect and Repair Wiring

• Step 1: Locate the ABS module and the related wiring harness.
• Step 2: Visually inspect the wiring for frays, cuts, or corrosion.
• Step 3: Use a multimeter to test continuity in the wiring. Repair or replace any damaged wires.
• Step 4: Ensure all connectors are clean and securely connected. Reconnect any loose connections.

3. Test Wheel Speed Sensors

• Step 1: Remove the wheel speed sensors from each wheel hub.
• Step 2: Clean the sensor and mounting area to ensure proper contact.
• Step 3: Measure the resistance of each sensor using a multimeter. Refer to the specifications for acceptable resistance values.
• Step 4: If sensors are faulty, replace them with new ones. Reinstall and secure them properly.

4. Replace ABS Module (if necessary)

• Step 1: If visual inspection of the ABS module shows damage, disconnect the battery again.
• Step 2: Remove any components blocking access to the ABS module.
• Step 3: Disconnect the electrical connectors from the ABS module.
• Step 4: Unbolt the ABS module from its mount and remove it.
• Step 5: Install the new ABS module, ensuring it is securely bolted in place.
• Step 6: Reconnect the electrical connectors and any components removed earlier.

5. Final Checks

• Step 1: Reconnect the battery and clear the C1900 code using the OBD-II scanner.
• Step 2: Perform a road test to confirm the ABS and traction control systems are functioning correctly.