Mode 2 Bench Test Results - 15C < Temperature < 35C

O2 Sensor Throttle Switch / Idle Switch Duty Cycle Duration
State Idle Cruise WOT (%)  
Open     50  
Open >--- --->   50>75>50 3 seconds
Open     50  
Open   >--- ---> 50>65  
Open     65  
Open   <--- ---< 65>50  
Open <--- ---<   50>75>50 3 seconds
0.500     93*  
0.500 >--- --->   93  
0.500     93  
0.500   >--- ---> 93>65  
0.500     65  
0.500   <--- ---< 65>93  
0.500 <--- ---<   93  
Legend: = Steady State condition
>------> = Transition
Open = open circuit (sensor disconnected, faulty, or cold)
Zero = Short to ground
0.500 = Volts from O2 sensor
Notes: Opening either the throttle switch or the microswitch produces the
temporary enrichment. Throttle Switch: "Cruise" is an open circuit.
"Idle" and "WOT"each produce a closed circuit to ground.
* Change to 93% comes with O2 transition from Open to 0.5V

Mode 1

Mode 3

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