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Home >> Infiniti >> 2017 >> QX30 Premium, AWD >> Repair and Diagnosis >> Steering >> Steering Control Systems >> Steering Control System (DTC/Circuit Diagnosis) >> DTC/Circuit Diagnosis >> DTC C1592: EPS Motor >> DTC Description >> DTC Detection Logic
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DTC Detection Logic

DTC CONSULT screen terms MELCO code DTC detection condition
(Trouble diagnosis content) [Malfunction type]
C1592 09 EPS actuator motor malf
(The electric power steering actuator motor has a malfunction.)		 [COMPONENT MALFUNCTION] 41 Diagnosis condition 8.5 V < Battery terminal voltage < 19.2 V
Signal (terminal) -
Threshold Control unit detected the following condition.
  • Malfunction in monitor part
  • Low voltage
  • Internal malfunction
  • Over current
Diagnosis delay time 0.048 seconds
C1592 09 EPS actuator motor malf
(The electric power steering actuator motor has a malfunction.)		 [COMPONENT MALFUNCTION] 42 Diagnosis condition Battery terminal voltage > 7.5 V
Signal (terminal) -
Threshold Control unit detected the following condition.
  • Internal malfunction
  • Over current
Diagnosis delay time 0.048 seconds
C1592 09 EPS actuator motor malf
(The electric power steering actuator motor has a malfunction.)		 [COMPONENT MALFUNCTION] 43 Diagnosis condition Battery terminal voltage > 7.5 V
Signal (terminal) -
Threshold Control unit detected the following condition.
  • Over current
Diagnosis delay time 0.048 seconds
C1592 09 EPS actuator motor malf
(The electric power steering actuator motor has a malfunction.)		 [COMPONENT MALFUNCTION] 44 Diagnosis condition Initial check
Signal (terminal) -
Threshold Motor terminal voltage is the following condition
  • Voltage < 0.7 V
  • Voltage > 3.9 V
Diagnosis delay time 0.5 seconds
C1592 09 EPS actuator motor malf
(The electric power steering actuator motor has a malfunction.)		 [COMPONENT MALFUNCTION] 45 Diagnosis condition
  • Battery terminal voltage > 8.5 V
  • Motor speed < 1, 700 RPM
  • No internal malfunction
Signal (terminal) -
Threshold Internal current is the following condition
  • Measured current < 2 Arms
  • Desired current > 4 Arms
Diagnosis delay time 2 seconds
C1592 09 EPS actuator motor malf
(The electric power steering actuator motor has a malfunction.)		 [COMPONENT MALFUNCTION] 46 Diagnosis condition
  • 7.5 V < Battery terminal voltage < 19.2 V
  • Motor speed < 200 RPM
  • No internal malfunction
Signal (terminal) -
Threshold Control unit detected the following condition.
  • Over voltage
Diagnosis delay time 0.2 seconds
C1592 09 EPS actuator motor malf
(The electric power steering actuator motor has a malfunction.)		 [COMPONENT MALFUNCTION] 47a Diagnosis condition
  • Initial check is finished
  • Motor speed < 400 RPM
  • No over current for motor control
Signal (terminal) -
Threshold Control unit detected the following condition.
  • Over voltage
Diagnosis delay time 0.1 second
C1592 09 EPS actuator motor malf
(The electric power steering actuator motor has a malfunction.)		 [COMPONENT MALFUNCTION] 47b Diagnosis condition
  • Initial check is finished
  • Motor speed < 400 RPM
Signal (terminal) -
Threshold Control unit detected the following condition.
  • Over voltage
Diagnosis delay time 0.2 seconds
C1592 49 EPS actuator motor malf
(The electric power steering actuator motor has a malfunction.)		 [INTERNAL ELECTRONIC ERROR] 32, 33 Diagnosis condition 8.5 V < Battery terminal voltage < 19.2 V
Signal (terminal) -
Threshold Control unit detected the following condition.
  • Internal malfunction
Diagnosis delay time 0.2 seconds
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