Diagnostic Aids
- The catalyst test may abort due to a change in the engine load. Do not change the engine load, i.e. A/C, coolant fan, heater motor, while a catalyst test is in progress.
- An intermittent condition may be caused by a poor connection, rubbed-through wire insulation, or a wire that is broken inside the insulation. For an intermittent condition, refer to Intermittent Conditions .
- Any circuitry that is suspected as causing the intermittent complaint should be thoroughly inspected for the following conditions:
- Backed-out terminals
- Improper mating
- Broken locks
- Improperly formed
- Damaged terminals
- Poor terminal-to-wire connection