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3-84 FUEL SYSTEM (DFI)
Oxygen Sensor - not activated (Service Code 33, Equipped Models)
If the reading is out of the standard (with plugs: DC 0.7
V or more, without plugs: DC 0.2 V or less), remove the
ECU and check the wiring for continuity between main
harness connectors.
Disconnect the ECU and sensor connectors.
Wiring Continuity Inspection
ECU Connectors [A] ←→
Oxygen Sensor Connector [B]
BL/Y lead (ECU terminal 8) [C]
G lead (ECU terminal 49) [D]
If the wiring is good, replace the sensor.
If the reading is within the standard (with plugs: DC 0.7 V
or more, without plugs: DC 0.2 V or less), check the ECU
for its ground and power supply (see ECU Power Supply
Inspection).
If the ground and power supply are good, replace the ECU
(see ECU Removal/Installation).
Oxygen Sensor Circuit
1. Ignition Switch
2. Fuse Box 1
3. Ignition Fuse 15 A
4. Oxygen Sensor
5. ECU
6. Joint Connector E
7. Frame Ground 5
8. Engine Ground
9. Battery 12 V 10 Ah
10. Starter Relay
11.MainFuse30A
12. ECU Fuse 15 A
13. Relay Box
14. ECU Main Relay
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