Mitsubishi MOTORS Space Runner 1999 Workshop Manual Supplement page 870

Inspection Procedure 11
Doors do not lock or unlock when the key cylinder
(passenger's side) is operated.
The door lock key cylinder switch (passenger's side) may be defective.
Door lock key cylinder switch
(passenger's side) continuity check
(Refer to P.42-43.)
OK
Measure at the door lock key cylinder
switch connector(passenger's side)
E-16.
Disconnect the connector and
measure at the harness side.
Voltage between 1 and body earth
Voltage between 3 and body earth
OK: System voltage
OK
Check the following connectors:
E-16, B-64X, B-21*
NG
Repair
*: with keyless entry system
BODY –
NG
Replace
NG
Check the following connectors:
E-16, B-22, B-64X, B-21*
Check trouble symptoms.
Check the harness between the
door lock-ECU or keyless entry
receiver-ECU and door lock key
cylinder switch, and repair if
necessary.
OK
Check trouble symptoms.
Check the harness wire between door
lock key cylinder switch and earth or
joint connector, and repair if necessary.
Door
Probable cause
Malfunction of the door lock key cylinder switch
(passenger's side)
Malfunction of harness or connector
NG
OK
NG
NG
42-27
Repair