SRS ± Troubleshooting
52B-18
Code No.71, 72, 75, 76
Side air bag module (R.H.) (squib) system
Probable cause
Abnormal resistance is present between input terminals of SRS-ECU for side air
bag module (R.H.) (squib). See table below for what each code tells.
However, as for code Nos. 71 and 72, once trouble is extinguished, SRS warning
lamp will go out. (Diagnosis code will remain stored)
D Malfunction of wiring harnesses or connectors
D Malfunction of side air bag module (R.H.) (squib)
D Malfunction of SRS-ECU
Code No. Trouble causes
71 D Short in side air bag module (R.H.) (squib) or harness short
72 D Open in side air bag module (R.H.) (squib) or open harness
D Poor connector contact
75 D Side air bag module (R.H.) (squib) harness short to power supply
76 D Side air bag module (R.H.) (squib) harness short to earth
Check the following connectors: D-01, D-36
Repair
OK
Check trouble symptoms.
NG
Check wiring harness between the side air bag module (R.H.)
and SRS-ECU.
Repair
OK
Replace SRS-ECU.
NG
NG
Replace the seat back assembly (R.H.)
SRS check harness
(MB991613)
Check harness
MUT-II Self-diag code
D Disconnect the side air bag module (R.H.) connector D-01
D Insert the probe (MB991222) from the rear of the harness side connector
and connect the check harness to the probe.
Caution
Never insert the probe directly to the terminals from the front of
the connector.
D Disconnect the resistance connector from the SRS check harness
(MB991613) and connect to the check harness.
D Connect the negative (±) battery terminal.
D Erase diagnosis code memory.
Is code No.71, 72, 75 or 77 displayed?
Resistance (3 Ω)
YES NO
Resistance (3 Ω)
Check harness
Probe
(MB991222)
Body wiring harness
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