DTC 86-19: F-CAN Communication With Steering Angle Sensor Malfunction

2015 Acura TLX Base, 2.4L EngSECTION DTC 86-19: F-CAN Communication With Steering Angle Sensor Malfunction
Confirmation Procedure Basic Condition:
  • 12 volt battery voltage 9.6 - 16.5 V

Operating Condition:

  • 1.

    Turn the vehicle to the ON mode.

Execution Regular Diagnosis
Duration About 1 second
DTC Type
  • 1 drive cycle
  • VSA indicator on
  • Brake system indicator (amber) on
Fail Safe Action
  • Degrade ABS performance
  • Stop VSA function
  • Stop TCS function (Fade out)
  • Stop hill start assist function
  • Stop automatic brake hold function (Fade out)
  • Stop agile handling assist function
Possible Cause
  • Open between the VSA modulator-control unit and the steering angle sensor (F-CAN_L, F-CAN_H lines)* 1
  • Open between the VSA modulator-control unit and the steering angle sensor (F-CAN A_L, F-CAN A_H lines)* 2
  • Open between the steering angle sensor and the CAN gateway (F-CAN A_L, F-CAN A_H lines)* 3
  • Open between the VSA modulator-control unit and the CAN gateway (F-CAN A_L, F-CAN A_H lines)* 3
  • Open between the VSA modulator-control unit and the CAN gateway (F-CAN B_L, F-CAN B_H lines)* 3
  • Open between the steering angle sensor and the under-dash fuse/relay box (IG1 VSA/ABS line)* 4
  • Open between the steering angle sensor and the under-dash sub fuse/relay box B (IG1 VSA (DC) line)* 5
  • Open between the steering angle sensor and the body ground (GND line)
  • Steering angle sensor failure
  • VSA modulator-control unit internal failure

*1: L4 engine

*2: V6 engine without CAN gateway

*3: V6 engine with CAN gateway

*4: Without auto idle stop system

*5: With auto idle stop system

RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.