Mitsubishi 1989-1993 GALANT Service Manual page 477

AUTO-CRUISE CONTROL SYSTEM - Troubleshooting
Auto-cruise control system cannot be set.
Prepare to conduct input check.
Were codes No. 21, 22 and 25 displayed when,
with the vehicle stationary, the input check
codes were recalled?
Yes
Yes No
Check results
Code 21 remains even though
SET switch is set to OFF.
Code 22 remains even though
RESUME switch is set to OFF.
Code 23 remains even though
CANCEL switch is set to OFF.
Code 25 does not disappear, and
code 24 does not appear, even
though vehicle speed reaches ap- cuit (damaged or dis-
proximately 40 km/h (25 mph) or
higher.
Check tl
(G to check chart No.5 on page 13-343.)
O
NOTE
If. after the occurrence of the problem, the ignition switch and
the main switch have not been switched OFF, it is possible to
determine (by checking the on-board diagnostic output code)
which circuit canceled the system's operation.
This chart is to be used, then, for troubleshooting if it is not
No
Damaged or disconnected wiring of the SET or RESUME switch
l
normals?
SET switch ON mal-
function
SET switch input line
short-circuit
RESUME switch ON
malfunction
RESUME switch input
line short-circuit
Malfunction of the
CANCEL circuit
(ON malfunction)
Malfunction of the ve- Check or repair the
connected wiring, or
short-circuit)
1
NOTE
If the results of the check of the actuator circuit (check Chart
condition, replace the electronic control unit (ECU).
TSB Revision
(Go to check chart 2 and 3 on page 13-338.339.)
Remedy
Replace the control
switch.
Repair the harness.
Replace the control
switch.
Repair the harness.
Check or repair each
CANCEL circuit.
circuit.
Check chart
No.
No. 2
No. 3
No. 6-1, 6-2,
6-3
No.