Z155

- Key Off.

- Disconnect ICM from tester.

- Key On, Engine Off.

- Place wiggle test switch to ON.

- Place the MODE switch to ON.

- Press RESET button and wait 5 seconds for initialization.

- Wiggle Test.

- Are any fault memory LEDs on?

Yes -- PRESS RESET button. CONTINUE to test until intermittent is isolated.

No -- GO to Z156. Z156