SRS – Troubleshooting52B-13
Code No.44 SRS warning lamp drive circuit systemProbable cause
This diagnosis code is output when a short occurs in the lamp drive circuit or a
malfunction of the output transistor inside the SRS-ECU is detected while the SRS-ECU
is monitoring the SRS warning lamp drive circuit.Malfunction of wiring harnesses or connectors
Malfunction of SRS-ECU
Check the SRS warning lamp drive circuit system.
(Refer to P.52B-12)OKReplace the SRS-ECU.
Code No.45 SRS-ECU non-volatile memory (EEPROM)
and A/D converter systemProbable cause
This diagnosis code is output if there is a malfunction in the SRS-ECU non-volatile
memory (EEPROM) and A/D converter.Malfunction of SRS-ECU
Code No.Trouble symptom
45Non-volatile memory
(EEPROM)Non-volatile memory (EEPROM) is abnormal.
Replace the SRS-ECU.
Code No.51 or 52 Driver’s side air bag module (squib
ignition drive circuit) systemProbable cause
This diagnosis code is output if a short (No.51) or an open circuit (No.52) is detected
in the circuit for the driver’s seat.Malfunction of SRS-ECU
Code No.Trouble symptom
51Driver’s side air bag module
(squib ignition drive circuit)
Short circuit in the squib ignition drive circuit
52
(squib ignition drive circuit)
Open circuit in the squib ignition drive circuit
Replace the SRS-ECU.
Code No.54 or 55 Front passenger’s side air bag module
(squib ignition drive circuit) systemProbable cause
This diagnosis code is output if a short (No.54) or an open circuit (No.55) is detected
in the circuit for the passenger’s seat.Malfunction of SRS-ECU
Code No.Trouble symptom
54Front passenger’s side air
bag module (squib ignition
Short circuit in the squib ignition drive circuit
55
bag module (squib ignition
drive circuit)Open circuit in the squib ignition drive circuit
Replace the SRS-ECU.
