Test Requirements
- The Fuses OK.
- Heater For Oxygen Sensor 1 After Catalytic Converter -Z29- OK.
- Battery voltage at least 12.5 volts.
- All electrical consumers such as, lights and rear window defroster, switched OFF.
- Vehicles with automatic transmission, selector lever in position "P" or "N".
- A/C switched OFF.
- Ground connections between engine/transmission/chassis OK.
- Exhaust system between catalytic converter and cylinder head properly sealed.
- Coolant Temperature at least 80°C.