Mitsubishi MOTORS Space Runner 1999 Workshop Manual Supplement page 967

52B-18
INSPECTION CHART FOR TROUBLE SYMPTOMS
Get an understanding of the trouble symptoms and check according to the inspection procedure chart.
Trouble symptom
Communication with
MUT-II is not possible.
When the ignition key is turned to "ON" (engine stopped), the
SRS warning lamp does not illuminate.
After the ignition switch is turned to ON, the SRS warning lamp
is still on after approximately 7 seconds have passed.
INSPECTION PROCEDURE FOR TROUBLE SYMPTOMS
Inspection Procedure 1
Communication with MUT-II is not possible. (Communica-
tion with all systems is not possible.)
The cause is probably a power supply system (including earth circuit) of the diagnosis
line.
Refer to GROUP 13A – Troubleshooting.
Inspection Procedure 2
Communication with MUT-II is not possible.
(Communication is not possible with SRS only.)
If communication is not possible with the SRS only, the cause is probably an open
circuit in the diagnosis output circuit of the SRS or in the power circuit (including
earth circuit).
Measure at SRS-ECU connector D-25.
Disconnect the connector, and measure at the harness side
connector.
(1) Continuity between terminal 35 and body earth, and between
terminal 20 and body earth
OK: Continuity
Connect the battery (–) terminal.
Ignition switch: ON
(2) Voltage between terminal 18 and body earth, and between
terminal 21 and body earth
OK: 9 V or more
OK
Check the following connectors: D-25, B-35
OK
Check trouble symptoms.
NG
Check the harness wire between the SRS-ECU and diagnosis
connector.
OK
Replace the SRS-ECU.
SRS –
Communication with all systems is not
possible.
Communication is not possible with
SRS only.
NG
Repair
NG
Repair
Troubleshooting
Inspection procedure No.
1
2
Refer to diagnosis code No.43.
Refer to diagnosis code No.43,
44.
Probable cause
Malfunction of connectors
Malfunction of wiring harness
Probable cause
Malfunction of wiring harnesses or connectors
Malfunction of SRS-ECU
(1) NG
Check the following connector: D-25
OK
Check trouble symptoms.
NG
Check the harness wire between the SRS-ECU and earth, and
(2) NG
repair if necessary.
Check the following connectors: D-25, B-80, B-78
OK
Check trouble symptoms.
NG
Check the harness wire between the SRS-ECU and ignition switch
IG , and repair if necessary.
1
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Reference page
52B-18
52B-18
52B-13
52B-14
NG
Repair
NG
Repair