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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 P0635: Control Unit >> 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]
P0635 06 EPS malfunction
(The electric power steering has a malfunction.)		 [ALGORITHM BASED ERROR] AC, B3, B4, B5,
B0, B1, B6, B7, C0, C1, C2, C3, C4, C5, C6, C8, C9, CA, CB, CC, CD, CE, CF		 Diagnosis condition Ignition switch ON
Signal (terminal) -
Threshold Control unit detects internal malfunction.
Diagnosis delay time 0.016 seconds
P0635 06 EPS malfunction
(The electric power steering has a malfunction.)		 [ALGORITHM BASED ERROR] B2 Diagnosis condition Ignition switch ON
Signal (terminal) -
Threshold Control unit detects internal malfunction.
Diagnosis delay time 0.24 seconds
P0635 06 EPS malfunction
(The electric power steering has a malfunction.)		 [ALGORITHM BASED ERROR] 9C Diagnosis condition Ignition switch ON
Signal (terminal) -
Threshold Control unit detects internal malfunction.
Diagnosis delay time 0.048 seconds
P0635 06 EPS malfunction
(The electric power steering has a malfunction.)		 [ALGORITHM BASED ERROR] D8 Diagnosis condition Ignition switch ON
Signal (terminal) -
Threshold Control unit detects internal malfunction.
Diagnosis delay time 0.02 seconds
P0635 06 EPS malfunction
(The electric power steering has a malfunction.)		 [ALGORITHM BASED ERROR] D9 Diagnosis condition Ignition switch ON
Signal (terminal) -
Threshold Control unit detects internal malfunction.
Diagnosis delay time 2 seconds
P0635 06 EPS malfunction
(The electric power steering has a malfunction.)		 [ALGORITHM BASED ERROR] DA Diagnosis condition Ignition switch ON
Signal (terminal) -
Threshold Control unit detects internal malfunction.
Diagnosis delay time 1 second
P0635 06 EPS malfunction
(The electric power steering has a malfunction.)		 [ALGORITHM BASED ERROR] DB Diagnosis condition Ignition switch ON
Signal (terminal) -
Threshold Control unit detects internal malfunction.
Diagnosis delay time 0.24 seconds
P0635 06 EPS malfunction
(The electric power steering has a malfunction.)		 [ALGORITHM BASED ERROR] DC Diagnosis condition Ignition switch ON
Signal (terminal) -
Threshold Control unit detects internal malfunction.
Diagnosis delay time 0.2 seconds
P0635 06 EPS malfunction
(The electric power steering has a malfunction.)		 [ALGORITHM BASED ERROR] DE Diagnosis condition Ignition switch ON
Signal (terminal) -
Threshold Control unit detects internal malfunction.
Diagnosis delay time 0.004 seconds
P0635 09 EPS malfunction
(The electric power steering has a malfunction.)		 [COMPONENT MALFUNCTION] 76 Diagnosis condition Engine running
Signal (terminal) -
Threshold Battery terminal voltage > 3 V
Diagnosis delay time 0.052 seconds
P0635 09 EPS malfunction
(The electric power steering has a malfunction.)		 [COMPONENT MALFUNCTION] 57 Diagnosis condition Initial check
Signal (terminal) -
Threshold Motor terminal voltage < 0.75 V
Diagnosis delay time 0.012 seconds
P0635 09 EPS malfunction
(The electric power steering has a malfunction.)		 [COMPONENT MALFUNCTION] 56 Diagnosis condition Ignition switch ON
Signal (terminal) -
Threshold Control unit detects the following condition.
  • Internal temperature > 184°C (363.2°F)
  • Internal temperature < - 50°C (- 58°F)
  • Output voltage > 4.9 V
  • Output voltage < 0.1 V
Diagnosis delay time 0.2 seconds
P0635 09 EPS malfunction
(The electric power steering has a malfunction.)		 [COMPONENT MALFUNCTION] A0, A5, A8, 70, 87 Diagnosis condition Ignition switch ON
Signal (terminal) -
Threshold Control unit detects internal malfunction.
Diagnosis delay time 0.016 seconds
P0635 09 EPS malfunction
(The electric power steering has a malfunction.)		 [COMPONENT MALFUNCTION] 77, 86 Diagnosis condition 8.5 V < Battery terminal voltage < 19.2 V
Signal (terminal) -
Threshold Control unit detects internal malfunction.
Diagnosis delay time 0.048 seconds
P0635 09 EPS malfunction
(The electric power steering has a malfunction.)		 [COMPONENT MALFUNCTION] 84, 90, 91, 93, 94 Diagnosis condition Ignition switch ON
Signal (terminal) -
Threshold Control unit detects internal malfunction.
Diagnosis delay time 0.02 seconds
P0635 09 EPS malfunction
(The electric power steering has a malfunction.)		 [COMPONENT MALFUNCTION] 95, 96 Diagnosis condition Ignition switch ON
Signal (terminal) -
Threshold Control unit detects internal malfunction.
Diagnosis delay time 0.016 seconds
P0635 09 EPS malfunction
(The electric power steering has a malfunction.)		 [COMPONENT MALFUNCTION] 36 Diagnosis condition Ignition switch ON
Signal (terminal) -
Threshold Control unit detects internal malfunction.
Diagnosis delay time 0.15 seconds
P0635 43 EPS malfunction
(The electric power steering has a malfunction.)		 [SPECIAL MEMORY ERROR] 55 Diagnosis condition Ignition switch ON
Signal (terminal) -
Threshold Control unit detects internal malfunction.
Diagnosis delay time 1 time
P0635 45 EPS malfunction
(The electric power steering has a malfunction.)		 [PROGRAM MEMORY ERROR] A2a Diagnosis condition Ignition switch ON
Signal (terminal) -
Threshold Control unit detects internal malfunction.
Diagnosis delay time 1 time
P0635 45 EPS malfunction
(The electric power steering has a malfunction.)		 [PROGRAM MEMORY ERROR] A2b Diagnosis condition Ignition switch ON
Signal (terminal) -
Threshold Control unit detects internal malfunction.
Diagnosis delay time 0.016 seconds
P0635 49 EPS malfunction
(The electric power steering has a malfunction.)		 [INTERNAL ELECTRONIC ERROR] 52 Diagnosis condition After the initial check finishes and motor relay is turned ON
Signal (terminal) -
Threshold Control unit detects internal malfunction.
Diagnosis delay time Immediately
P0635 98 EPS malfunction
(The electric power steering has a malfunction.)		 [COMPONENT/SYS OVER TEMP] 71 Diagnosis condition All the time while wake-up by CAN
Signal (terminal) -
Threshold Control unit detects high internal temperature.
Diagnosis delay time 1second
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