Nissan Sentra B18 (2020-2025) Service Manual / Steering / Steering Control System :: Dtc/circuit Diagnosis / C1608-54 Control Unit

Nissan Sentra B18 (2020-2025) Service Manual: C1608-54 Control Unit

Dtc Description

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
C1608–54	CONTROL UNIT (Control unit)	Diagnosis condition	When ignition switch is ON.
		Signal (terminal)	-
		Threshold	When programing incomplete is detected in EPS control unit.
		Diagnosis delay time	1 second or more

POSSIBLE CAUSE

EPS control unit

FAIL-SAFE

Normal control

Confirmation Procedure

PRECONDITIONING
1. If “Confirmation Procedure” has been previously conducted, always place the ignition switch OFF and wait at least 10 seconds before conducting the next test.
>>
GO TO 2.
DTC REPRODUCTION PROCEDURE
1. CONSULT
  1. Start the engine.
    
    CAUTION:
    
    Never drive the Nissan Sentra vehicle.
  2. Select "Self Diagnostic Result" mode of “EPS/DAST 3”.
Is DTC “C1608-54” detected?
YES>>
Proceed to diagnosis procedure. Refer to DTC Diagnosis Procedure.
NO>>
To check malfunction symptom before repair: Refer to Intermittent Incident.
NO>>
Confirmation after repair: Inspection End.

Dtc Diagnosis Procedure

DTC Diagnosis Procedure

PERFORM SELF DIAGNOSTIC RESULT
1. CONSULT
  1. Ignition switch OFF to ON.
  2. Erase "Self Diagnostic Result" mode of "EPS/DAST 3".
  3. Ignition switch OFF and wait for at least 10 seconds.
  4. Start the engine.
    
    CAUTION:
    
    Never drive the Nissan Sentra vehicle.
  5. Select "Self Diagnostic Result" mode of “EPS/DAST 3”.
Is DTC “C1608-54” detected?
YES >>
EPS control unit is malfunctioning. Replace steering gear assembly. Refer to Removal and Installation.
NO >>
Check pin terminal and connection of each harness connector for malfunctioning conditions.

 C1608-49 Control Unit

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 C1621-86 Bcm System

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