E5 Check Circuit 570 (BK/W) For Open

- Turn ignition switch OFF.

- Disconnect anti-lock brake module connector.

- Using an ohmmeter connected to a known good ground, measure resistance at module connector pin 1 and pin 21, circuit 570 (BK/W) to ground.

- Is resistance 5 ohms or less?

YES -- Diagnose data communication link circuit 70 (LB/W).

NO -- Service circuit 570 (BK/W) for open. Restore vehicle. Retest system.