Diagnostic Aids

If an overheating condition is present, overheat condition must be repaired and engine oil and filter must be changed. Using FREEZE FRAME and/or FAILURE RECORDS data may aid in locating intermittent condition. If DTC cannot be duplicated, information included in FREEZE FRAME and/or FAILURE RECORDS can be useful in determining how many miles since DTC set. It can also be used to determine how many ignition cycles diagnostic reported a pass and/or fail condition. Operate vehicle within same freeze frame conditions (RPM, load, vehicle speed, temperature, etc.) that are noted. This will isolate when DTC failed. If other DTC(s) are set that share same ground and/or 5-volt reference circuit, check for faulty connections or wiring.