HD3 - Check For On-Demand Self-Test DTCs

- Are any Key On Engine Off or Key On Engine Running DTCs displayed on the Scan Tool?

YES -- REFER to Powertrain DTC Charts and PROCEED as required. [1][2]Diagnostic Trouble Code (DTC) Charts

NO -- GO to Pinpoint Test Step JB1 to evaluate spark plugs and secondary wires. JB1 - DTC 0300, 0301, 0302, 0303, 0304, 0305, 0306, 0307, 0308

If OK, GO to HD8. HD8 - Check Resistance of Injector(s) and Harness