Nissan Sentra B18 (2020-2025) Service Manual / Steering / Steering Control System :: Dtc/circuit Diagnosis / C161b-86 Abs System

Nissan Sentra B18 (2020-2025) Service Manual: C161b-86 Abs System

Dtc Description

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
C161B-86	ABS system (Anti-lock braking system )	Diagnosis condition	When ignition switch is ON.
		Signal (terminal)	CAN communication signal
		Threshold	When a malfunction is detected in ABS actuator and electric unit (control unit).
		Diagnosis delay time	2 seconds or more

POSSIBLE CAUSE

CAN communication line
ABS actuator and electric unit (control unit)
EPS control unit

FAIL-SAFE

Constant steering assist level

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. Ignition switch ON.
  2. Select “Self Diagnostic Result” mode of “EPS/DAST 3”.
Is DTC “C161B-86” 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 ON.
  2. Select “Self Diagnostic Result” mode of “ABS”.
Is any DTC detected?
YES >>
Check the DTC. Refer to DTC Index.
NO >>
GO TO 2.
CHECK CONNECTOR AND TERMINAL
1. 1. Ignition switch OFF.
  2. Disconnect ABS actuator and electric unit (control unit) harness connector.
  3. Disconnect EPS control unit harness connector.
  4. Check the connector for disconnection or looseness.
  5. Check the pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?
YES >>
GO TO 3.
NO >>
Repair or replace harness, connector, or terminal, securely lock the connector.
PERFORM SELF DIAGNOSTIC RESULT
1. CONSULT
  1. Connect ABS actuator and electric unit (control unit) harness connector.
  2. Connect EPS control unit harness connector.
  3. Ignition switch ON.
  4. Erase "Self Diagnostic Result" mode of "EPS/DAST 3".
  5. Ignition switch OFF and wait for at least 10 seconds.
  6. Ignition switch ON.
  7. Select “Self Diagnostic Result” mode of “EPS/DAST 3”.
Is DTC “C161B-86” detected?
YES>>
EPS control unit is malfunctioning. Replace steering gear column assembly. Refer to Removal and Installation.
NO>>
Inspection End.

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