Z13

- Continue to monitor the information from the previous step.

- GO to the area of the suspected wiring or component fault.

- Key On, Engine Running.

- Wiggle and pull each component wire (Signal, Signal Return and VREF, if applicable) from the component back to the PCM connector.

- Look for abrupt changes in PID values. 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?

Yes -- Possible wiring or component problem. CHECK each wire for corrosion, bent or loose terminals and wire terminal crimps. SERVICE as necessary. Otherwise if the value dropped out while checking the PCM harness connector and there is no evidence of a wiring fault, REPLACE PCM. If unable to verify repair, REINSTALL original PCM and RETURN to Z1 and choose another procedure. Z1 - Intermittent Test Procedure

No -- Unable to verify fault. RETURN to Z1 and choose another procedure. Z1 - Intermittent Test Procedure