Test Description

The numbers below refer to the step numbers in the diagnostic procedures.

1. 2
   
   When the system is operating correctly, the HO2S voltage should toggle above and below the specified values.
2. 5
   
   If the HO2S low signal circuit is shorted to ground, the HO2S voltage will be less than 400 mV when the HO2S high signal circuit is jumped to ground.
3. 6
   
   The specified value is what is measured on a correctly operating system.
4. 7
   
   The specified value is what is measured on a correctly operating system.
5. 14
   
   The new PCM must be programmed.