Nissan Sentra Service Manual: C1120, C1122, C1124, C1126 ABS In valve system

Nissan Sentra Service Manual / Brakes / Brake control system / Dtc/circuit diagnosis / C1120, C1122, C1124, C1126 ABS In valve system

DTC Logic

Dtc detection logic

DTC	Display Item	Malfunction detected condition	Possible causes
C1120	FR LH IN ABS SOL	When a malfunction is detected in front LH ABS IN valve.	Harness or connector ABS actuator and electric unit (control unit) Fusible link Battery power supply system
C1122	FR RH IN ABS SOL	When a malfunction is detected in front RH ABS IN valve.
C1124	RR LH IN ABS SOL	When a malfunction is detected in rear LH ABS IN valve.
C1126	RR RH IN ABS SOL	When a malfunction is detected in rear RH ABS IN valve.

DTC CONFIRMATION PROCEDURE

1.CHECK SELF DIAGNOSTIC RESULT

With CONSULT

Turn ignition switch ON.
Perform self diagnostic result.

Is DTC C1120, C1122, C1124 or C1126 detected? YES >> Proceed to diagnosis procedure. Refer to BRC-72, "Diagnosis Procedure".

NO >> Inspection End.

Diagnosis Procedure

Regarding Wiring Diagram information, refer to BRC-44, "Wiring Diagram".

1.CONNECTOR INSPECTION

Turn ignition switch OFF.
Disconnect ABS actuator and electric unit (control unit) connector.
Check connector and terminals for deformation, disconnection, looseness or damage.

Is the inspection result normal? YES >> GO TO 2.

NO >> Repair or replace as necessary.

2.Check ABS Actuator and electric unit (control unit) battery power supply

Check voltage between ABS actuator and electric unit (control unit) connector E33 terminal 25 and ground.

Is the inspection result normal?

Is the inspection result normal? YES >> GO TO 3.

NO >> Repair or replace malfunctioning components.

3.Check ABS actuator and electric unit (control unit) ground circuit

Check continuity between ABS actuator and electric unit (control unit) connector E33 terminals 13, 38 and ground.

Is the inspection result normal?

Is the inspection result normal? YES >> Replace ABS actuator and electric unit (control unit). Refer to BRC-110, "Removal and Installation".

NO >> Repair or replace malfunctioning components.

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