3-92 FUEL SYSTEM (DFI)
Oxygen Sensor Heaters #1, #2 (Service Code 67) (Oxygen Sensor Equipped
Oxygen Sensor Heater Removal/Installation
The oxygen sensor heater is built in the oxygen sensor.
So, the heater itself can not be removed. Remove the oxy-
gen sensor (see Oxygen Sensor Removal in the Electrical
Oxygen Sensor Heater Inspection
Remove the right side cover (see Right Side Cover Re-
moval in the Frame chapter).
Disconnect the each oxygen sensor lead connectors [A].
Connect a digital meter to the terminals in the oxygen
sensor lead connector [B].
White Lead Terminal [C]
White Lead Terminal [D]
Oxygen Sensor Resistance
About 8 Ω at 20°C (68°F)
If the meter reading is not as specified, replace the oxygen
sensor with a new one.
If the meter reading is specified, check the power source
Be sure the battery is fully charged.
Connect a digital meter [A] to each oxygen sensor con-
nector [B], using the needle adapter set [C].
Special Tool - Needle Adapter Set: 57001-1457
Oxygen Sensor Heaters Power Source Voltage
Connections to Oxygen Sensor Connector
Meter (+) → W (main harness side P/BK) lead [D]
Meter (−) → Battery (−) Terminal [E]
Oxygen Sensor #1 [F]
Oxygen Sensor #2 [G]
Measure the power source voltage with the engine
stopped, and with the oxygen sensor connector joined.
Turn the ignition switch ON.
Power Source Voltage at Sensor Connector