C3 Check Grounds

- Measure resistance between pin C1-4 and a known good ground.

- Measure resistance between pin C1-6 and a known good ground.

- Is the resistance between the two ground pins and ground less than 5 ohms?

YES -- Go to C4. C4 Check ABS Brake Indicator

NO -- Service open or partial open between pins C1-4, C1-6 and ground. Restore vehicle. Clear DTCs and retest.