AA1 Unable to Enter Drive Cycle Diagnostics

^ Drive Cycle Diagnostics has not been entered. There are five possible causes:

^ STAR Tester is inoperative.

^ Battery Positive Voltage (B+) power supply circuit is inoperative.

^ Ignition switch circuit is inoperative.

^ Self Test Input (STI) circuit is inoperative.

^ Self Test Output (STO) circuit is inoperative.

Go to AA2.