1985-1998 [Subscribe to Daily Digest] |
From a PDF file which I can email to you (with diagrams)-1992 9000.
DESCRIPTION & OPERATION
Cruise control system consists of speed transmitter (in
speedometer), selector switch, control unit, vacuum pump, vacuum
controller and pedal switches.
SELECTOR SWITCH
When cruise control system is turned on, voltage is applied
to vacuum pump and vacuum valve. When SET button is depressed, vehicle
road speed is read by speed transmitter.
VACUUM PUMP
Vacuum pump generates vacuum in vacuum controller. Vacuum
corresponds to selected speed. Vacuum controller is connected by a
chain to accelerator linkage.
Vehicle speed is continuously monitored and is compared with
value stored in memory. If a deviation occurs, vacuum pump/vacuum
valve will increase or decrease vacuum in controller, thereby
resetting accelerator linkage.
PEDAL SWITCHES
If clutch or brake pedal is depressed, ground circuit is
opened by corresponding pedal switch, releasing vacuum. Pedal switches
are grounded across brake light bulbs. If a fault occurs in a pedal
switch, cruise control system will be deactivated by brakelight switch
CONTROL UNIT
Control unit, located under left side of instrument panel,
retains memory of set speed until ignition is turned off.
TESTING
1) Turn ignition on. Put selector switch in OFF position. On
automatic transmission vehicles, ensure voltage is present at fuse No.
9 and idle speed switch. On manual transmission vehicles, ensure
voltage is present at fuse No. 2.
2) Ensure battery voltage is present at selector switch
terminal No. 4 (Brown wire) and control unit terminal No. 1. (Brown
wire). Battery voltage should also be present at speed transmitter
terminal No. 1 (Green/White wire).
3) Put selector switch in ON position. Check for battery
voltage at selector switch terminal No. 1 (Red wire) and control unit
terminal No. 9 (Red wire). Check for battery voltage at vacuum pump
terminal No. 3 (Red wire).
4) Put selector switch in SET position. Check for battery
voltage at selector switch terminal No. 2 (Red/White wire) and control
unit terminal No. 2 (Red/White wire).
5) Put selector switch in RESUME position. Check for battery
voltage at selector switch terminals No. 1 (Red wire) and 3 (Yellow
wire). Check for battery voltage at control unit terminals No. 6
(Yellow wire) and 9 (Red wire). Check for battery voltage at vacuum
pump terminal No. 3 (Red wire).
posted by 139.103.3...
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