Dz4 Check The UO2S, UO2SGREF, UO2SHTR Circuits For An Open In The Harness

Key in OFF position.

Measure the resistance between:

( + ) Universal HO2S Connector, Harness Side	( - ) PCM Connector, Harness Side
UO2S - Pin 6	UO2S - Pin E38
UO2SGREF - Pin 2	UO2SGREF - Pin E26
UO2SHTR - Pin 3	UO2SHTR - Pin E52

Are the resistances less than 5 ohms?
- Yes: INSTALL a new Universal HO2S. REFER to the ELECTRONIC ENGINE CONTROLS .
  RESET the keep alive memory (KAM). REFER to RESETTING THE KEEP ALIVE MEMORY (KAM) .
  
  REPEAT the self-test.
- No: REPAIR the open circuit. CLEAR the DTCs. REPEAT the self-test.