Res Switch

Set + Switch The non latching Set + switch (C1254) is provided a feed via the horn relay (C0576) on a PY wire. When the switch is pulled back against spring pressure, the switch contacts close and a feed is provided to the cruise control ECU (C0239) via the rotary coupler (C0082) on a RW wire.

If cruise control is active, and the switch is operated for the first time, the cruise control ECU will store the current vehicle speed in its memory and maintain that speed.

NOTE: The cruise control ECU will only store and maintain the vehicle speed if it is within the operating limits given in the 'Description' section above.

If the switch is tapped a second time, the ECU will increase the vehicle speed by 1 mph. If the switch is pulled back and held against spring pressure, the vehicle will accelerate until the switch is released. The final vehicle speed in both instances will be stored in the cruise control ECU memory.

Res Switch

The non latching Res switch (C1254) is provided a feed via the horn relay (C0576) on a PY wire. When the switch is pulled back against spring pressure, the switch contacts close and a feed is provided to the cruise control ECU (C0239) via the rotary coupler (C0082) on a UW wire.

If the Res switch is pulled back against spring pressure, the cruise control ECU will alter vehicle speed to reflect the vehicle speed held within its memory. If the Res switch is pulled back for a second time, cruise control operation will be suspended

NOTE: If a road speed value is not held within the cruise control ECU memory, the ECU will not respond to the Res switch input. To enter a vehicle speed into the ECU memory, refer to the 'Set + Switch' section above.

Brake Lamp Switch – 01MY Vehicles The Hall effect brake lamp switch (C0652) is provided an ignition feed from fuse 35 of the passenger compartment fuse box (C0580) on a W wire. The switch (C0652) is earthed on a B wire. When the brake pedal is in its normal position, the switch provides the cruise control ECU (C0239) a low voltage (between approximately 0V and 2V) on a PG wire. When the brake pedal is pressed, this voltage rises to between approximately 6V and battery voltage. When the ECU registers this rise in voltage, it suspends cruise control operation.

The brake lamp switch (C0652) also provides a brake pedal status signal to the cruise control interface unit (C1959) on a GR wire.