DTC 74

CIRCUIT DESCRIPTION
When the ignition switch is turned to ON, the ignition relay is activated and battery positive voltage is applied to terminal +B of the ECU. When the ignition switch is turned to OFF, the ignition relay is de-energized and the power source is cut off.
This power source energizes the suspension control actuator, height control valve, relay, indicator, each IC and sensor.




DETECTING CONDITIONS
When the ECU stores DTC 75 in memory, vehicle height control is not carried out until a normal signal is input to the ECU from the height control sensor.
However, control is resumed if the ignition switch is turned off, then on again.




WIRING DIAGRAM

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INSPECTION PROCEDURE