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Tahoe / Yukon Service Manual

DTC C124F, C1250, or C1251

Diagnostic Instructions Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions DTC Descriptor DTC C124F Lateral Acceleration Sensor Circuit Low Voltage DTC C1250 Lateral Acceleration Sensor Circuit High Voltage DTC C1251 Lateral Acceleration Sensor Performance Symptom Byte Information: Symptom Byte List Circuit/System Description For an overview of the component/system, refer to: ABS Description and Operation

Component Description
B119 Multi-axis Acceleration Sensor The yaw rate, lateral and longitudinal acceleration sensors are internal to the inflatable restraint sensing and diagnostic module.
K160 Brake System Control Module The control module K160 can increase and decrease the brake pressure on all 4 wheels individually in order to fulfill these functions: Antilock Braking Traction Control Vehicle Stability Control The control module K160 can also influence the following control modules to limit the amount of produced torque: K20 Engine Control Module K71 Transmission Control Module

Conditions for Running the DTC The vehicle speed is greater than 16 km/h (10 MPH). Conditions for Setting the DTC Fault = Detected @ Transmission Control Module Actions Taken When the DTC Sets Actions Taken When the DTC Sets Air Bag Malfunction Indicator = ON Traction/Stability Control Indicator = ON Conditions for Clearing the DTC The conditions for setting the DTC no longer exist. A history DTC will clear after 40 consecutive malfunction-free ignition cycles. Reference Information Schematic Reference Antilock Brake System Schematics Connector End View Reference Master Electrical Component List Electrical Information Reference Circuit Testing Connector Repairs Testing for Intermittent Conditions and Poor Connections Wiring Repairs Scan Tool Reference Control Module References Circuit/System Verification

  1. Ignition » On / Vehicle » In Service Mode
  2. Verify no other DTCs are set. ⇒ If any other DTCs are set Refer to: Diagnostic Trouble Code (DTC) List - Vehicle ⇓ If no other DTCs are set
  3. Replace the component: K36 Restraints Control Module
  4. Under normal operating conditions: Verify that no DTCs are set. ⇒ If the DTC sets Replace the component: that set the DTC. ⇓ If the DTC is not set
  5. All OK. Repair Instructions Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair Verification For control module replacement, programming, and setup refer to: Control Module References