DTC 73
When the engine is stopped, the alternator does not generate electricity, so the voltage at ECU terminal REG is low and diagnostic trouble code "73" is output.
While the engine is running with the alternator generating electricity, the voltage at terminal REG becomes high. Thus the ECU detects the alternator generating condition and controls vehicle height only when the alternator is in generating condition.
Wiring Diagram:
Inspection Procedure - Step 1:
Step 2:
