SRS ± Troubleshooting
52B-17
Code No.43 SRS warning lamp drive circuit system
(Lamp does not come on)
Probable cause
Open circuit is present for 5 successive seconds or more in SRS warning lamp
drive circuit.
However, once trouble is extinguished, this code, if displayed due to open circuit,
will be automatically erased.
D Defective wiring harnesses or connectors
D Blown bulb
D Malfunction of SRS-ECU
D Malfunction of combination meter
OK
NG
Check bulb for being blown.
Replace SRS-ECU.
OK
Replace combination
meter.
Check SRS warning lamp.
D Connect negative (±) battery terminal.
D Ignition switch: ON
D Does lamp come on when SRS-ECU connector C-32 is
disconnected?
OK: Lamp illuminates
OK
Check trouble symptoms.
NG
Repair
NG
NG
Repair
OK
NG
Repair
Check the following connectors: C-02, C-06, C-07, C-32
Check wiring harness between SRS-ECU, combination meter
and ignition switch IG
1.
Code No.43 SRS warning lamp drive circuit system
(Lamp does not go out.)
Probable cause
Harness between SRS warning lamp and SRS-ECU is being shorted to earth.
However, once trouble is extinguished, this code will be automatically erased, and
SRS warning lamp will go out.
D Defective wiring harnesses or connectors
D Malfunction of SRS-ECU
D Malfunction of combination meter
NO
NO
Replace SRS-ECU.
OK
Replace SRS-ECU.
Check SRS warning lamp.
D Connect negative (±) battery terminal.
D Ignition switch: ON
D Does lamp go out when combination meter connector C-07
is disconnected?
Check the following connectors: C-07, C-32
OK
Check trouble symptoms.
NG
Repair
Check wiring harness between SRS-ECU and combination meter
.
NG
NG
Repair
Code No.44 SRS warning lamp drive circuit system Probable cause
Short is present in SRS warning lamp drive circuit, or output transistor in SRS-ECU
is defective.
However, once trouble is extinguished, this code will be automatically erased, and
SRS warning lamp will go out.
D Defective wiring harnesses or connectors
D Malfunction of SRS-ECU
Check SRS warning lamp drive circuit system.
(Refer to P.52B-17)
OK
Replace SRS-ECU.
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