Air Suspension ECU

Air Suspension ECU

The air suspension ECU (C0867) is located behind the LH side of the fascia, and is connected to the centre console rotary switch (C0700) as follows:

If the rotary switch is turned to select a lower suspension setting, an earth path is created via the switch on a UP wire If the rotary switch is turned to select a higher suspension setting, an earth path is created via the switch on an SR wire If the 'Hold' switch has been selected, an earth path is created via the switch on a YW wire.

NOTE: The air suspension ECU will only allow the suspension settings to change if all the conditions described in the 'Suspension' section of the System Description and Operation Workshop manual have been met.

The air suspension ECU (C0867) also provides a feed to the LED's contained on the face of the centre console rotary switch (C0700) as follows:

To the 'Motorway' LED on an SY wire To the 'Off Road' LED on an SG wire To the 'Access' LED on an SP wire To the 'Standard' LED on a WY wire To the 'Hold' LED on an SU wire.

Height Sensors

The Air Suspension ECU monitors the height of the vehicle via four height sensors. The air suspension ECU is connected to the height sensors as follows:

RH Front Height Sensor

The air suspension ECU (C0867) provides a feed to the RH front height sensor (C1697) on a BW wire. An earth path is provided for the sensor on a BN wire. By measuring the voltage returned on a BS wire, the air suspension ECU can determine the height of the RH front of the vehicle.

LH Front Height Sensor

The air suspension ECU (C0867) provides a feed to the LH front height sensor (C1696) on an SB wire. An earth path is provided for the sensor on an SN wire. By measuring the voltage returned on an SW wire, the air suspension ECU can determine the height of the LH front of the vehicle.