D1 DTC 24 Check Valve Coil Circuit 497 and the ABS ECM

- Ignition off.

- Install Rotunda Breakout Box 014-00322 or equivalent and Rotunda Breakout Box Adapter with Overlay 007-00103 or equivalent.

- Verify terminals at Pins 17 and 34 are clean and secure in the harness connector of the antilock electronic control module.

- Measure resistance between Pins 17 and 34.

- Is reading between 5 and 8 ohms?

YES -- Go to D5. D5 Verify Integrity of Vehicle Wiring

NO -- Go to D2. D2 Check Valve Coil