FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
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Test 1: Check Actual Value G3/1 (O2 Sensor Downstream TWC)



Check actual value G3/1 (O2 sensor downstream TWC)

Test prerequisite
- Engine at idle speed
- At coolant temperature �C, start engine and maintain engine speed of 1/min for about 3 minutes.

Status of relevant actual value:
- Temperature of coolant: Communication with ECU required
- O2 sensor voltage downstream of TWC: Communication with ECU required

Specified value
- O2 sensor voltage downstream of TWC: Range must drop below or rise above range 450 to 500 mV 1 times within a minute.(Engine at idle speed)

Question: Are the actual values o.k.?