Haltech E6S - Manual (Page 23)

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1.3.6. Mount Optional Exhaust Gas Oxygen Sensor
The optional exhaust gas oxygen sensor must be mounted in the exhaust pipe near the exhaust
header or extractors, usually after the collector. The sensor uses the exhaust gas to detect if the
engine is lean or rich. Many late model engines already have provision for an exhaust gas
oxygen sensor and the sensor provided should fit any standard exhaust mount. Some exhaust
systems have the sensor mount up to around half a meter (2 feet) down stream from the
exhaust headers.
If the exhaust system does not have an existing sensor mount then a new mount will have to
be welded to the exhaust system.
When routing the electrical connections to the exhaust gas oxygen sensor do not allow the
harness to touch the exhaust pipe as the heat will damage them.
See Chapter 15 [15.3] for more information on exhaust gas oxygen sensors.
1.3.7. Route Wiring Harness and Connect Sensors
Lay the main wiring harness out in the engine bay with the sensors mounted to ascertain the
best fit for the harness. Pass the wiring loom through a hole in the engine bay firewall and into
the passenger compartment where the ECU will be mounted. Either use an existing hole or cut
a new hole to suit. Use a rubber grommet or similar device to protect the harness from being
damaged by rubbing on the sharp edge of the hole.
IMPORTANT
••••
Do not allow the harness to touch hot exhaust parts including manifolds or
turbochargers.
••••
Try to route the main harness away from high voltage ignition leads. Under no
circumstances run any wiring parallel to, or in contact with the ignition leads.
Hint: Be neat. Run the harness in a tidy fashion. Try to run the harness along paths used by
original wiring. Use nylon cable ties to secure the harness in place, but do not stress the wiring
or connectors.
Once the harness is fitted, connect all the sensors to their appropriate plugs.
1.3.8. Power Relays
There are two relays used with the Haltech E6S, the Main Power Relay (with a grey wire) and
the Fuel Pump Relay (two orange wires). These relays are identical parts so it is not important
which relay goes in what connector.