Z30

- Key Off.

- Connect Scan tool to DLC.

- Access PIDs based on information from the pinpoint test or from the Intermittent Symptom Chart. Intermittent Symptom Charts

- GO to the area of the suspected wiring, vacuum or component fault (based off the PIDs selected and ignition component attached to the Symptom Chart).

- Key On, Engine Running.

- Accurately spray water on each component circuit wire, component or vacuum line related to the possible fault area.

- Look for abrupt changes in PID values or Engine Running conditions.

- Compare the actual values to the Diagnostic Reference Values. Normal Scan Data Values - Includes Pids

- Are any PID values out of range or drop out and back into range or was there a noticeable engine misfire/stumble?

Yes -- Fault area is identified. If fault occurred while spraying on component, REPLACE part and VERIFY repair. If unable to verify, REINSTALL original part. If fault occurred while spraying the circuit wiring, CHECK each wire for corrosion, bent or loose terminals and wire terminal crimps. SERVICE as necessary. If fault occurred while spraying the vacuum line, SERVICE as necessary. VERIFY repair. If unable to verify repair, PERFORM test over.

No -- Unable to verify fault. CONTINUE to Z31. Z31