SRS – Troubleshooting / SRS Maintenance
52B-15
Inspection Procedure 2
Communication with MUT-II is not possible.
(Communication is not possible with SRS only.)
Probable cause
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).
D Malfunction of wiring harnesses or connectors
D Malfunction of SRS-ECU
OK
Check trouble symptoms.
NG
Check the harness wire between the SRS-ECU and earth, and
repair if necessary.
OK
Check trouble symptoms.
NG
Check the harness wire between the SRS-ECU and ignition switch
IG
1
, and repair if necessary.
Measure at SRS check harness
connector (5).
D Disconnect SRS-ECU
connector B-51.
D Connect SRS check
harness connector (3).
D Continuity between
terminals (20)
OK: Continuity
NG
Check the following
connectors:
B-51, B-78, B-80
NG
Repair
SRS check harness
(MB991613)
3
5
OK
Replace the SRS-ECU.
OK
Check the harness wire between the SRS-ECU and diagnosis
connector.
NG
Repair
OK
Measure at SRS check harness connector (5).
D Disconnect SRS-ECU connector B-51.
D Connect SRS check harness connector (3).
D Ignition switch: ON
D Voltage between terminal (13) and body earth
OK: 9 V or more
D Voltage between terminal (14) and body earth
OK: 9 V or more
NG
Check the following
connectors:
B-51, B-78, B-76
NG
Repair
SRS MAINTENANCE
The SRS must be inspected by an authorized dealer 10 years
after the date of vehicle registration.
SRS WARNING LAMP CHECK
Turn the ignition key to the “ON” position. Does the SRS
warning lamp illuminate for about 7 seconds, turn off and
then remain extinguished for at least 5 seconds? If yes, SRS
system is functioning properly. If no, consult page 52B-6.
SRS warning lamp
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