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Home >> Infiniti >> 2018 >> QX30 Essential, AWD >> Repair and Diagnosis (Single Page) >> Steering >> Steering Control Systems >> Steering Control System (DTC/Circuit Diagnosis) >> DTC/Circuit Diagnosis >> DTC P1644: 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]

P1644

00

INTERNAL CONTROL MODULE

(An incorrect variant coding or configuration was detected.)

[NO SUBTYPE INFORMATION]

50

Diagnosis condition

Ignition switch ON

Signal (terminal)

--

Threshold

Control unit detects internal malfunction.

Diagnosis delay time

1 time

P1644

00

INTERNAL CONTROL MODULE

(An incorrect variant coding or configuration was detected.)

[NO SUBTYPE INFORMATION]

72

Diagnosis condition

  • Ignition switch ON
  • CAN communication is active

Signal (terminal)

--

Threshold

Control unit detects internal malfunction.

Diagnosis delay time

--

P1644

00

INTERNAL CONTROL MODULE

(An incorrect variant coding or configuration was detected.)

[NO SUBTYPE INFORMATION]

73

Diagnosis condition

Ignition switch ON

Signal (terminal)

--

Threshold

Control unit detects internal malfunction.

Diagnosis delay time

--