2012 Infiniti G25 BaseFACTORY OEM SERVICE PROCEDURE

System Description: System: Fail-Safe

WARNING: This page is about a different car, the 2011 Nissan Leaf. However, it is still accessible from the selected car via links, so may be relevant.
  • When there is a malfunction in the power system of the electrically-driven intelligent brake unit (no voltage is generated), voltage is temporarily supplied to the electrically-driven intelligent brake unit from the brake power supply backup unit. At the same time, the brake warning lamp (red) and brake system warning lamp (yellow) turn ON and the buzzer sounds.
  • When a malfunction occurs in the electrically-driven intelligent brake unit, the VDC function performs control (boost operation).
  • When a malfunction occurs in the DC/DC-J/B and 12V battery, the braking force is determined by the force pressing on the brake pedal (no boost operation). At the same time, brake warning lamp (red) and the brake system warning lamp (yellow) turns ON.
  • When a malfunction occurs in the brake power supply backup unit, the brake system warning lamp (yellow) turns ON.
  • When a malfunction occurs in the electrically-driven intelligent brake and in the VDC function, the braking force is determined by the force pressing on the brake pedal (no boost operation). At the same time, the brake warning lamp (red) and brake system warning lamp (yellow) turn ON.
  • When a malfunction occurs in the electrically-driven intelligent brake, VDC function, and power system, cooperative regenerative brake control is not performed.
DTC CHART

DTC Vehicle condition
C1A60 The following functions are suspended.
  • Boost operation by the electrically-driven intelligent brake
  • Cooperative regenerative brake control
  • Power supply from the brake power supply backup unit
C1A61
C1A62
C1A63 The following functions are suspended.
  • Power supply from the brake power supply backup unit
C1A64 The following functions are suspended.
  • Boost operation by the electrically-driven intelligent brake
  • Cooperative regenerative brake control
  • Power supply from the brake power supply backup unit
C1A65
C1A66 The following functions are suspended.
  • Cooperative regenerative brake control
C1A67 Normal control
C1A69 The following functions are suspended.
  • Boost operation by the electrically-driven intelligent brake
  • Cooperative regenerative brake control
  • Power supply from the brake power supply backup unit
C1A6A
C1A6B The following functions are suspended.
  • Backup power supply from the brake power supply backup unit
C1A6C
C1A6D
C1A6E The following functions are suspended.
  • Cooperative regenerative brake control
C1A6F Normal control
C1A70 The following functions are suspended.
  • Cooperative regenerative brake control
C1A74 The following functions are suspended.
  • Cooperative regenerative brake control
U1000
U1010
U1510 Normal control
U1511
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When to See a Mechanic

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

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