Diagnostic Aids

Use FREEZE FRAME and/or FAILURE RECORDS data in order to locate an intermittent condition. If DTC cannot be duplicated, information included in FREEZE FRAME and/or FAILURE RECORDS data may aid in determining number of miles since DTC set.

FAIL COUNTER and PASS COUNTER can also aid in determining number of ignition cycles that diagnostic reported a PASS and/or FAIL. Operate the vehicle within same FREEZE FRAME conditions (RPM, engine load, vehicle speed, temperature, etc.). This will isolate when DTC failed.

Check for intermittent or poor connections in related electrical connections. See DIAGNOSING INTERMITTENTS  . Repair wiring or connections as necessary.