Mitsubishi MOTORS Space Runner 1999 Workshop Manual Supplement page 897

42-54
Inspection Procedure 3
Secret codes cannot be registered.
One of the following items may be defective.
Diagnosis connector
Keyless entry receiver-ECU power supply circuit
Earth circuit
Diagnosis output circuit
Is communication with other sys-
tems(except MPI,TCL and Immobilizer
system) possible using the MUT-II?
Yes
Measure at the diagnosis connector
B-35 and the keyless entry receiver-
ECU connector B-21.
Disconnect the connector and
measure at the harness side.
Continuity between the following
terminals
OK: Continuity
<ECU side> <Diagnosis
connector side>
3 – 1
OK
Measure at the keyless entry receiver
ECU connector B-21.
Disconnect the connector and
measure at the harness side.
Voltage between 22 and body earth
OK: System voltage
OK
Measure at the keyless entry receiver
ECU connector B-21.
Disconnect the connector and
measure at the harness side.
Voltage between 21 and body earth
OK: Continuity
NG
Check the following connector:
B-21
NG
Repair
BODY –
Keyless Entry System
No
Measure at the diagnosis connector
B-35.
Voltage between 16 and body earth
OK: System voltage
Measure at the diagnosis connector
B-35.
Continuity between 4 and body earth
Continuity between 5 and body earth
OK: Continuity
Replace the MUT-II
NG
Check the following connectors:
B-35, B-21
Check trouble symptoms.
NG
Check the following connectors:
B-43, B-21
Check trouble symptom.
OK
Check the following connector:
B-21
Check trouble symptoms.
OK
Check trouble symptoms.
Probable cause
Malfunction of the keyless entry receiver-ECU
Malfunction of the MUT-II
Malfunction of harness or connector
NG
OK
NG
OK
NG
OK
NG
NG
OK
NG
NG
OK
NG
NG
Check the following connectors.
B-35, B-81, B-75
OK NG
Check trouble symptom.
NG
Check the harness wire between power
supply and diagnosis connector, and
repair if necessary.
Check the following connector:
B-35
OK NG
Check trouble symptom.
NG
Check the harness wire between diag-
nosis connector and earth, and repair
if necessary.
Repair
Check the harness wire between key-
less entry receiver-ECU and diagnosis
connector, and repair if necessary.
Repair
Check the harness wire between fusible
link No.1 and keyless entry receiver-
ECU, and repair if necessary.
Repair
Replace the keyless entry receiver
ECU.
Check the harness wire between key-
less entry receiver-ECU and earth, and
repair if necessary.
Repair
Repair