Active Electronic Control Suspension Troubleshooting - Mitsubishi 1989-1993 GALANT Service Manual

ACTIVE-ELECTRONIC CONTROL SUSPENSION
Diagnostic service
data switching input
Simulated vehicle-
speed input
Ground
TSB Revision
TROUBLESHOOTING
TROUBLESHOOTING POINTS
REGARDING THE DIAGNOSTIC FUNCTION
For the ACTIVE-Electronic Control Suspension (ACTIVE-ECS),
the control unit has been provided with the following
electronic
functions in order to make checking of the electronic-control
(1) Diagnostic trouble code output
(2) Service data output
(3) Actuator test
Note that all of the above can be checked by using the
scan tool.
Also note that the diagnostic trouble codes can be checked
by using the voltmeter.
NOTE
For information concerning testing procedures by using the
scan tool, refer to P.33B-11.
CHECKING THE ELECTRONIC CONTROL UNIT (ECU) SIG-
NAL CIRCUIT
precise, with internal batteries of 3V or more.
(2) Care should be taken about the outflow of current from the
tester when checking for continuity of terminals and the
power-supply circuitry for the photo sensors (front and rear
height sensors and steering angle velocity sensor). Use of
the x10 range is preferable, but the xl range can be used
if the indicator does not move sufficiently to the right.
(3) The resistance values noted as standard values are simply
reference values. If there is continuity, the part can be
considered to be OK.
(4) If a power relay or solenoid valve is to be activated, first
check carefully to be sure that there is no damaged or
disconnected wiring or a short-circuit. Also do not make
unnecessary connections so that wiring contacts the body.
Take particular care to be sure that the wiring of battery
power-supply connections is secure.