Nissan Maxima Service and Repair Manual: ECU diagnosis information

POWER STEERING CONTROL UNIT

Reference Value

TERMINA LAYOUT

PHYSICAL VALUES

CAUTION: When using circuit tester or oscilloscope to measure voltage for inspection, be sure not to extend forcibly any connector terminals.

Fail Saf

EPS system

• EPS system enters the fail-safe mode (that allows the steering
  force to be controlled without impairing the drive ability) if any of
  the input/output signals to/from EPS system (power steering control
  unit) deviate from the standard.
  NOTE:
  The system enters the fail-safe mode if the engine speed remains
  at 1,500 RPM or more for over 10 seconds while the vehicle is
  stopped. This is normal.
• The fail-safe function is cancelled when a vehicle speed signal of 2
  km/h (1.2 MPH) or more is inputted or the key switch is turned
  OFF→ ON. EPS system restores the normal operation at that time