Test Step 3 - (K299) O2 SENSOR 1/2 HEATER CONTROL CIRCUIT SHORTED TO GROUND

Fig 1: Measuring Resistance Between Ground And (K299) O2 Sensor 1/2 Heater Control Circuit In O2 Sensor Harness Connector

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

• Disconnect the PCM C2 harness connector.
• Measure the resistance between ground and the (K299) O2 Sensor 1/2 Heater Control circuit in the O2 Sensor harness connector.

Is the resistance below 5.0 Ohms?

Yes 

• Repair the short to ground in the (K299) O2 Sensor 1/2 Heater Control circuit.
• Perform the Powertrain Verification Test. Refer to PCM Verification Test (2009 - 2011) & PCM Verification Test (2012 & Up) .

No 

• Go to Test Step 4 - EXCESSIVE RESISTANCE IN THE (K299) O2 SENSOR 1/2 HEATER CONTROL CIRCUIT