Manual Innovate LC-1 (page 19 of 24) (English)

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b. Vehicle has a 2-wire sensor:

While the engine is off determine which of the 2 wires has a low resistance between the wire and

the sensor body. This is the heater power for the sensor. Wire analog output 1 directly to the

other wire. Leave the heater power wire unconnected but make sure it cannot ground itself or see

above.

c. Vehicle has a 3-wire sensor:

Typically the 3 wires are: heater power, Ground, and sensor element connection.

Generally they have 1 black wire and 2 white wires. Connect the black wire from the EFI

computer to analog output 1 of the meter. Leave the other wires unconnected but make sure they

cannot contact any metal parts or see above. If the wiring colors are different, then heater power

can simply be determined by measuring the voltage on the wires when the engine is running. The

wire showing 12V or more is the heater power. The sensor element connection voltage fluctuates

around 0.45V when the car is warmed up. Wire analog output 1 directly to this wire. The Ground

connection has low resistance to chassis ground (less than 1 Ohm). Measure while the engine is

off.

d. Vehicle has a 4-wire sensor

Typically the 4 wires are: heater power, heater ground, sensor ground, and sensor element

connection. Proceed as for the 3-wire sensor.

Appendix A: LC-1 Cable Pinouts

A1. Sensor Interface Connector (Standard DIN-5 female)

Lambda Meter Signal Wire Colors

Bosch LSU4.2

1 Pump+ red

2 Sens+ black

3 Heater - white

4 Pump-/Sens- yellow

5 Heater + gray

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Innovate LC-1 Manual

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