P open circuit between AF and AF

AF+ terminal voltage

0.5 to 4.5 V

AF- terminal voltage

0.5 to 4.5 V

Difference between AF+ and AF- terminal voltages

0.1 to 0.8 V

ECT

10°C (50°F) or more (varies with ECT at engine start)

Engine

Running

Fuel-cut

OFF

Time after fuel-cut OFF

2.5 seconds or more

A/F sensor heater

ON

Battery voltage

10.5 V or more

Ignition switch

ON

Time after ignition switch is OFF to ON

5 seconds or more

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