U2 Check Circuit 539 (PK/Lb)

- Remove anti-lock brake control module, install Rotunda(r) Breakout Box 014-00322 or equivalent. Verify Pin 1 is ground. Using the Breakout Box For Circuit Checks

- Key ON.

- Jumper Pins 1 and 19 to energize main relay.

- Verify that contacts are not sticking or welded.

- Is pump motor running?

YES -- Repair short to ground in Circuit 539 (PK/LB). Go to U4. U4 Check For DTC Repeatability

NO -- Go to U4. U4 Check For DTC Repeatability