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Pinpoint Test M: SASM (Steering Angle Sensor Module) Signal Failure DTCS

  1. M1 CHECK FOR SASM (STEERING ANGLE SENSOR MODULE) DIAGNOSTIC TROUBLE CODES (DTCS) 
    • Ignition ON.
    • Using a diagnostic scan tool, carry out the SASM  self-test.

    Are there any Diagnostic Trouble Codes (DTCs) present in the SASM? 

    • Yes  : DIAGNOSE all SASM  Diagnostic Trouble Codes (DTCs) before diagnosing any ABS  C0051:xx Diagnostic Trouble Codes (DTCs).

      GO to the SASM DTC CHART .

    • No  : GO to  M2
  2. M2 CHECK FOR ABS (ANTI-LOCK BRAKE SYSTEM) MODULE DIAGNOSTIC TROUBLE CODES (DTCS) 
    • Using a diagnostic scan tool, carry out the ABS  module self-test.
    • Retrieve and record all ABS  module Diagnostic Trouble Codes (DTCs).

    Is DTC U0126:00 present? 

    • Yes  : DIAGNOSE DTC  U0126:00 before diagnosing any C0051:xx Diagnostic Trouble Codes (DTCs). GO to PINPOINT TEST K 
    • No  : For all C0051:xx Diagnostic Trouble Codes (DTCs), GO to  M3

      For all other ABS  module Diagnostic Trouble Codes (DTCs), GO to the ABS  Module DTC  Chart.

  3. M3 VERIFY SASM (STEERING ANGLE SENSOR MODULE) CALIBRATION 
    • Using a diagnostic scan tool, carry out the IVD Initialization routine. Follow the diagnostic scan tool directions.
    • Ignition OFF.
    • Ignition ON.
    • Test drive the vehicle above and make at least 1 left turn and 1 right turn.
    • Using a diagnostic scan tool, carry out the ABS  module self-test.

    Are any C0051:xx Diagnostic Trouble Codes (DTCs) present? 

    • Yes  : GO to  M4
    • No  : The condition that caused the concern is no longer present. The concern was most likely due to an incomplete calibration or a failed calibration of the SASM  .
  4. M4 CHECK THE SASM (STEERING ANGLE SENSOR MODULE) STEERING WHEEL ANGLE (SW_ANGLE) PARAMETER IDENTIFICATION (PID) 
    • Park the vehicle with the wheels in the straight ahead position.
    • Using a diagnostic scan tool, monitor the SASM  SW_ANGLE Parameter Identification (PID).
    • Starting from the center (straight ahead) position, turn the steering wheel to the right until it stops. Record the SW_ANGLE Parameter Identification (PID) display.
    • Starting from the center (straight ahead) position, turn the steering wheel to the left until it stops. Record the SW_ANGLE Parameter Identification (PID) display.

    Does the Parameter Identification (PID) display at least 360 degrees after reaching each end of travel point? 

    • Yes  : GO to  M7
    • No  : CHECK the vehicle history and VERIFY if a new clockspring or SASM  has been installed.

    If a new SASM  has been installed, GO to  M5

    If a new clockspring has been installed, VERIFY correct clockspring installation.

    REFER to: CLOCKSPRING .

    If a new clockspring or SASM  have not been installed, INSTALL a new SASM  .

    REFER to: STEERING ANGLE SENSOR MODULE (SASM) .

  5. M5 INSPECT THE SASM (STEERING ANGLE SENSOR MODULE) INSTALLATION 
    • Ignition OFF.
    • Remove the clockspring.

      REFER to: CLOCKSPRING .

    • Inspect the SASM  and the SASM  electrical connectors for any obvious signs of damage, corrosion, foreign material or looseness.

    Are the SASM and electrical connector OK? 

  6. M6 VERIFY THE SASM (STEERING ANGLE SENSOR MODULE) ZERO POSITION 
    • Ignition ON.
    • Using a diagnostic scan tool, monitor the SASM  steering wheel angle (SW_ANGLE) Parameter Identification (PID).
    • Turn the SASM  rotor by hand until the SW_ANGLE displays 0 degrees.
    • Ignition OFF.
    • Install the clockspring.

      REFER to: CLOCKSPRING .

    • Ignition ON.
    • Using a diagnostic scan tool, clear all Continuous Memory Diagnostic Trouble Codes (CMDTCs).
    • Ignition OFF.
    • Ignition ON.
    • Using a diagnostic scan tool, carry out the ABS  module self-test.

    Are any C0051:xx Diagnostic Trouble Codes (DTCs) present? 

    • Yes  : GO to  M7
    • No  : The condition that caused the concern is no longer present. The concern was most likely due to an incorrectly installed SASM  . RETURN the vehicle to the customer.

      For all other ABS  module Diagnostic Trouble Codes (DTCs), GO to the ABS  Module DTC  Chart.

  7. M7 CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE YAW RATE VALUE (YAW_RATE) PARAMETER IDENTIFICATION (PID) 
    • Ignition ON.
    • Using a diagnostic scan tool, monitor the ABS  module YAW_RATE Parameter Identification (PID).

    Is the YAW_RATE Parameter Identification (PID) value between -0.05 and 0.05? 

    • Yes  : GO to  M8
    • No  : GO to  M10
  8. M8 CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE LATERAL ACCELERATION (LAT_ACCL) PARAMETER IDENTIFICATION (PID) 
    • Using a diagnostic scan tool, monitor the ABS  module LAT_ACCL Parameter Identification (PID).

    Is the LAT_ACCL Parameter Identification (PID) value between -0.4 and 0.4? 

    • Yes  : GO to  M9
    • No  : GO to  M10
  9. M9 CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE LONGITUDINAL ACCELERATION (LNGACC) PARAMETER IDENTIFICATION (PID) 
    NOTE: The vehicle must be on level ground and at a complete standstill. Any vehicle movement results in false values for this test.
    • Using a diagnostic scan tool, monitor the ABS  module LNGACC Parameter Identification (PID).

    Is the LNGACC Parameter Identification (PID) value between -0.4 and 0.4? 

    • Yes  : GO to  M11
    • No  : GO to  M10
  10. M10 CHECK THE RCM (RESTRAINTS CONTROL MODULE) INSTALLATION AND MOUNTING SURFACE 
    WARNING: Turn the ignition OFF and wait one minute to deplete the backup power supply. Failure to follow this instruction may result in serious personal injury or death in the event of an accidental deployment.
    • Ignition OFF and wait one minute.
    • Disconnect RCM C310A  and C310B  .
    • Inspect the RCM  installation and make sure the fasteners are fully seated and tightened correctly.

      REFER to: RESTRAINTS CONTROL MODULE (RCM) .

    • Inspect the RCM  mounting surface for damage, corrosion or dirt.

    Is the RCM installed correctly and is the mounting surface clean and free from damage? 

    • Yes  : GO to  M11
    • No  : REPAIR or INSTALL new as necessary.

      REFER to: RESTRAINTS CONTROL MODULE (RCM) .

      Ignition OFF. WAIT 1 minute. Connect RCM C310A  and C310B  . CLEAR the RCM  Diagnostic Trouble Codes (DTCs).

  11. M11 CHECK FOR CORRECT SASM (STEERING ANGLE SENSOR MODULE) OPERATION 
    • Ignition OFF.
    • Disconnect and inspect all SASM  electrical connectors (if not previously disconnected).
    • Repair:
      • corrosion (install new connector or terminal - clean module pins)
      • damaged or bent pins - install new terminals or pins
      • pushed-out pins - install new pins as necessary
    • Connect all SASM  electrical connectors. Make sure it seats and latches correctly.
    • Connect all RCM  electrical connectors. Make sure they seat and latch correctly.
    • Operate the system and determine if the concern is still present.

    Is the concern still present? 

    • Yes  : CHECK OASIS  for any applicable Technical Service Bulletins (TSBs). If a TSB  exists for this concern, DISCONTINUE this test and FOLLOW the TSB  instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new SASM  .

      REFER to: STEERING ANGLE SENSOR MODULE (SASM) .

      Ignition OFF. WAIT 1 minute. Connect RCM C310A  and C310B  . CLEAR the RCM  Diagnostic Trouble Codes (DTCs).

    • No  : 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.

    Ignition OFF. WAIT 1 minute. Connect RCM C310A  and C310B  . CLEAR the RCM  Diagnostic Trouble Codes (DTCs).

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