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Home >> Infiniti >> 2017 >> QX30 Base >> Repair and Diagnosis >> Steering >> Steering Control Systems >> Steering Control System (DTC/Circuit Diagnosis) >> DTC/Circuit Diagnosis >> DTC C1593: Torque Sensor >> 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]
C1593 1C Power steering torque sen malf
(The power steering torque sensor has a malfunction.)		 [CIRC VOLTAGE OUT OF RANGE] 11 Diagnosis condition 4.5 V < Torque sensor power supply voltage < 5.5 V
Signal (terminal) Torque sensor main signal
Threshold Main sensor output voltage is the following state
  • Output voltage > 4.7 V
  • Output voltage < 0.3 V
Diagnosis delay time 0.052 seconds
C1593 1C Power steering torque sen malf
(The power steering torque sensor has a malfunction.)		 [CIRC VOLTAGE OUT OF RANGE] 12 Diagnosis condition 4.5 V < Torque sensor power supply voltage < 5.5 V
Signal (terminal) Torque sensor sub signal
Threshold Sub sensor output voltage is following state
  • Output voltage > 4.7 V
  • Output voltage < 0.3 V
Diagnosis delay time 0.052 seconds
C1593 1C Power steering torque sen malf
(The power steering torque sensor has a malfunction.)		 [CIRC VOLTAGE OUT OF RANGE] 14 Diagnosis condition Battery power supply > 7.5 V
Signal (terminal) Torque sensor power supply
Threshold Torque sensor power supply voltage is the following state
  • Power supply voltage < 4.7 V
  • Power supply voltage > 5.3 V
Diagnosis delay time 0.052 seconds
C1593 1C Power steering torque sen malf
(The power steering torque sensor has a malfunction.)		 [CIRC VOLTAGE OUT OF RANGE] 17 Diagnosis condition Ignition switch ON
Signal (terminal) Torque sensor power supply
Threshold Torque sensor power supply voltage is the following state
  • Power supply voltage < 2.5 V
Diagnosis delay time 0.032 seconds
C1593 62 Power steering torque sen malf
(The power steering torque sensor has a malfunction.)		 [SIGNAL COMPARE ERROR] 13 Diagnosis condition 4.5 V < Torque sensor power supply voltage < 5.5 V
Signal (terminal)
  • Torque sensor main signal
  • Torque sensor sub signal
Threshold (Main sensor output voltage) + (Sub sensor output voltage) is the following state.
  • Total voltage > 5.375 V
  • Total voltage < 4.625 V
Diagnosis delay time 0.052 seconds
C1593 62 Power steering torque sen malf
(The power steering torque sensor has a malfunction.)		 [SIGNAL COMPARE ERROR] 16 Diagnosis condition 4.5 V < Torque sensor power supply voltage < 5.5 V
Signal (terminal)
  • Torque sensor main signal
  • Torque sensor sub signal
Threshold |Peak value - Average value| > 0.25 V
  • Peak value = Peak value of |main sensor output voltage + sub sensor output voltage - 5|
  • Average value = Average value of |main sensor output voltage + sub sensor output voltage - 5|
Diagnosis delay time 0.052 seconds
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