DTC 42

DTC 42 - COMPRESSOR MOTOR CIRCUIT

CIRCUIT DESCRIPTION
During raising of the vehicle height, a signal is sent from terminal RCMP of the ECU to switch the No.1 height control relay on. As a result, the relay contacts close and the compressor motor turns, producing compressed air.





At this time also, the ECU senses the amount of current flow to the compressor motor by means of the differences in potential at the terminals RM+ and RM- of the ECU. In this way, the ECU monitors the compressor circuit for abnormalities.





When the ECU stores diagnostic trouble code 42 in memory, vehicle height control is not carried out.

In this case, approximately 70 minutes after the ignition switch is turned on, when the normal signal is input to the ECU from the compressor motor, control resumed again.





DIAGNOSTIC CHART





WIRING DIAGRAM

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INSPECTION PROCEDURE