FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
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F17: Check For Short to B+ At O2 Sensor Heater









Ignition switch to position 0
Remove EMS fuse F14.
Disconnect EM010 and EM015.
Using a link lead, bridge EM010/016 and EM010/022.
Measure the voltage between EM010/023 and EM015/001.

Is the voltage 0 (zero) V?

Yes

Replace EMS fuse F14 but retain link lead
GO to F18, F18: Check B+ At O2 Sensor Heater Circuit

No
Inspect connectors EM010, EM015, and EM023 for corrosion, damaged/pushed back pins or repair the harness; reconnect plug(s).
GO to F19, F19: End