C061B

Code

Generic C — Chassis

ECM Request - Forced Traction Control Disable

Brand: Generic

Type: C — Chassis

Views: UK: 24 EN: 32 RU: 24

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

ECM commanding traction control disable (intentional request)
Loss of CAN or LIN communication between ECM and ABS/ESC module
Faulty ABS/ESC module or ECM software/firmware error
Defective traction control switch or driver request input
Wheel speed, brake, yaw, or steering angle sensor fault prompting disable
Low battery voltage, poor ground, or intermittent power supply

Symptoms

Traction control/ESC warning lamp illuminated on dash
Message: 'Traction control disabled' or similar
ABS warning or stability control lamp may also be lit
Possible reduced engine torque or limp-home behavior
Traction control will not engage during wheel slip
Related drivability issues if ECM has limited engine functions

What to check

Scan all modules and record stored/active/pendant DTCs from ECM, ABS/ESC, BCM and other modules
Check live data for 'TCS request' or 'ESC enable' flags in ECM and ABS modules
Verify battery voltage and charging system (at-rest and cranking)
Inspect CAN/LIN bus continuity, termination resistors and high/low voltages
Visually inspect wiring and connectors between ECM and ABS/ESC for corrosion, pin damage, and water intrusion
Check traction control switch, brake-light switch and other driver input switches for correct operation

Signal parameters

CAN message: ECM -> ABS/ESC TCS disable request flag (boolean)
Wheel speed sensor signals (Hz or speed in km/h/mph for each wheel)
Vehicle speed signal (derived)
Yaw rate and lateral acceleration values
Steering angle sensor position
Brake light switch / brake pressure status

Diagnostic algorithm

Retrieve and document all DTCs from ECM, ABS/ESC, and other modules. Note freeze-frame and timestamped events.
Clear codes and attempt to reproduce the condition while logging CAN messages and relevant sensor data (wheel speeds, TCS request flag).
Observe if ECM sets a TCS-disable request flag in live data. If present, inspect why ECM is requesting disable (look for engine or safety faults).
Check communication: verify CAN high/low voltages with key on, engine off; compare termination resistance (approx. 60 ohms across CAN_H and CAN_L).
Inspect wiring and connectors between ECM and ABS/ESC for damage, corrosion or water intrusion. Wiggle-test while monitoring communication and fault status if safe.
Verify operation of traction-control/ESC enable switch and brake-light switch; replace or repair faulty switches as indicated.
Test wheel speed, yaw, and steering angle sensors for correct signals and plausibility. Replace or repair faulty sensors or harnesses.
Check battery/ground connections and charger/regulator performance; weak supply can cause module faults and disable requests.
If communication or module faults persist, consult manufacturer service information for software updates or known module adaptions; perform module reprogramming if authorized.
Replace modules only after confirming wiring, power/ground and communications are good and after following manufacturer pairing/procedure steps.
After repairs, clear codes and road-test while monitoring to ensure the request no longer occurs and no related DTCs return.