Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSOLDSMOBILE1998ACHIEVA 3.1 M, 4T40E/MN4REPAIR AND DIAGNOSIS (SINGLE PAGE)RESTRAINTSAIR BAG, SRSSUPPLEMENTAL INFLATABLE RESTRAINT SYSTEMTESTING - DIAGNOSTICDTC B1071: INTERNAL SDM FAILURECONDITIONS FOR SETTING DTC
1998 Oldsmobile Achieva 3.1 M, 4T40E/MN4
Conditions For Setting DTC
1998 Oldsmobile Achieva 3.1 M, 4T40E/MN4SECTION Conditions For Setting DTC
DTC sets when any of the following conditions are detected by SDM:
- 23 VLR voltage is out of normal operating range during POWER-ON or CONTINUOUS MONITORING tests.
- Crash data recording reserve voltage discharge time failure for 3 consecutive ignition cycles during POWER-ON test.
- Calculated checksum for internal memory does not match stored value during POWER-ON test.
- Driver or passenger deployment loop is shorted to ground during CONTINUOUS MONITORING tests.
- Accelerometer is malfunctioning during POWER-ON or CONTINUOUS MONITORING tests.
- Driver or passenger current source is malfunctioning during RESISTANCE MEASUREMENT test.
- Temporary memory storage area is malfunctioning during POWER-ON test.
- SDM is unable to read from or write to EEPROM during POWER-ON test.
- Arming sensor inside SDM is not closed during deployment event.
- Voltage measured at DRIVER LOW and PASSENGER LOW is too low during POWER-ON or CONTINUOUS MONITORING tests.
- Device in SDM that arms system for deployment is malfunctioning during POWER-ON or CONTINUOUS MONITORING tests.
- Permanent memory storage area is malfunctioning during POWER-ON test.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.