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Home >> Audi >> 2017 >> S8 >> Repair and Diagnosis >> External Pages >> Different car >> Section 1301 (Abs Guided Routine Testing) >> Pinpoint Tests >> Pinpoint Test BL: SASM Ignition Input Circuit Fault >> Possible Causes
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Possible Causes

WARNING: This page is about a different car, the 2018 Lincoln Navigator. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.
  1. BL1: CHECK FOR OTHER SASM DTCS 
    • Ignition ON, engine OFF.
    • Carry out the SASM self-test.
    • Is DTC U3003:1C present? 
    Yes No
    GO to PINPOINT TEST BD . Go to  BL2.
  2. BL2: CHECK FOR OTHER BCM DTCS 
    • Carry out the Bdy CM self-test.
    • Are any DTCs present in the BCM? 
    Yes No
    DIAGNOSE all BCM DTCs. REFER to MULTIFUNCTION ELECTRONIC MODULES . Go to  BL3.
  3. BL3: CHECK THE SASM IGNITION VOLTAGE CIRCUIT FOR AN OPEN 
    • Ignition OFF.
    • SASM connector disconnected.
    • Measure the resistance between:
      (+) BCM_A Connector, Harness Side (-) SASM Connector, Harness Side
      IGN START/RUN IGN START/RUN
    • Measure the resistance between:
      (+) BCM_H Connector, Harness Side (-) SASM Connector, Harness Side
      IGN START/RUN IGN START/RUN
    • Is the resistance less than 3 ohms? 
    Yes No
    Go to  BL4. REPAIR the circuit.
  4. BL4: VERIFY ALL WIRING CONNECTIONS 
    • Using a good light source, inspect disconnected electrical connectors for the following:
      • corrosion - install new connector or terminal and clean the module pins.
      • damaged or bent pins - install new terminals or pins.
      • pushed-out pins - install new pins as necessary.
      • spread terminals - install new terminals as necessary.
    • Are the connectors free of corrosion, damaged pins, bent pins, pushed-out pins and spread terminals? 
    Yes No
    Go to  BL5. REPAIR the connector or terminals. REFER to OEM CONNECTOR REPAIR PROCEDURES for schematic and connector information.
  5. BL5: CHECK FOR CORRECT SASM OPERATION 
    • SASM connector connected. Make sure the connector seats and latches correctly.
    • Operate the system and determine if the concern is still present.
    • Is the concern still present? 
    Yes No
    INSTALL a new SASM.
    CHECK OASIS for any applicable service articles: TSB, GSB (general service bulletin), SSM (special service message) or FSA (Field Service Action).
    If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions.
    If no service articles address this concern, INSTALL a new SASM-clockspring. REFER to the appropriate Removal and Installation procedure in Airbag Supplemental Restraint System (SRS) .    		 The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.
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