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FUEL SYSTEM (DFI) 3-97
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 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 Heat
er Power
Source Voltage Inspection).
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