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3-100 FUEL SYSTEM (DFI)
Oxygen Sensor Heater (Service Code 67, Equipped Models)
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 (Equipped Mod-
els) in the Electrical System chapter).
Oxygen Sensor Heater Resistance Inspection
•
Turn the ignition switch off.
•
Open the clamp [A], and pull out the oxygen sensor lead
connector [B].
•
Disconnect the oxygen sensor lead connector.
•
Connect a digital meter [A] to the oxygen sensor lead con-
nector [B].
•
Measure the oxygen sensor heater resistance.
Oxygen Sensor Heaters Resistance
Connections: BK lead [C] ←→ BK lead [D]
Standard: 11.7
∼ 14.5 Ω at 20° C (68°F)
If the reading is out of the standard, replace the sensor.
If the reading is within the standard, check the power
source voltage (see Oxygen Sensor Heater Power
Source Voltage Inspection).
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