CRUISE CONTROL SYSTEM
Troubleshooting
5
Inspection of vacuum pump
drive circuit
I
CRUISE CONTROL
MAIN SWITCH
PUMP
26
13
12
DESCRIPTION OF OPERATION
The vacuum pump assembly consists of a di-
aphragm type negative pressure pump that is driven
by a DC motor, and two solenoid valves (control
valve and relief valve) and is controlled by the.
control unit as shown in the following table.
When the brake pedal is depressed during cruise
control operation, the power supply to the vacuum
pump assembly is cut off.
TROUBLESHOOTING HINTS
Diagnosis No. 11 (Automatically canceled)
ECU terminal voltage
TSB Revision
Summary of Contents for 3000GT 1991
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