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Converting To a Three Wire Oxygen Sensor, Series III XJ6

Converting To a Three Wire Oxygen Sensor, Series III XJ6

Doug Dwyer

Until the 1987 model year a single wire (non-heated) oxygen sensor was used. It is generally accepted that the heated, 3-wire sensor will work better. In fact, Jaguar recalled some 1986 California registered XJ6's to install the 3-wire sensor. Here are excerpts from the actual text of the recall.

In essence, this simply involves providing voltage (from fuel pump relay) and ground (to the manifold bolt) for the heating wires of the 3-wire type sensor. A Jaguar parts kit is mentioned but appropriate 3-wire sensors are available from the usual Jaguar suppliers or, by using the Parts Interchange, many regular parts stores.

RECALL CAMPAIGN B339
CALIFORNIA 1986 XJ6/VDP
OXYGEN SENSOR

Disconnect battery.

1) Locate the oxygen sensor in the exhaust system down pipe and disconnect the sensor harness.
2) Remove and discard oxygen sensor.
3) Clean the sealing face and install the new oxygen sensor to the exhaust down pipe.
4) Connect the existing harness and new link harness multi-plugs to the oxygen sensor harness.
5) Route the link harness along the air conditioning return hose and across the bulkhead to the fuel pump relay.
6) Secure the harness using supplied tie straps.
7) Position the fuel pump relay and relay base away from the bulkhead and remove the relay from the base.
8) Position the link harness green/white cable lucar connector into position 87A for the relay base.
9) Install the fuel pump relay to the relay base. Install the base and relay to the bulkhead.
10) Route the link harness ground eyelet to the engine inlet manifold. Tighten the ground mounting bolt.
11) Reconnect the battery and reset clock.

For this campaign, order using the kit, JLM 2037.

 

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