Nissan Sentra Service Manual: C1109 Power and ground system

Nissan Sentra Service Manual / Brakes / Brake control system / Dtc/circuit diagnosis / C1109 Power and ground system

DTC Logic

DTC DETECTION LOGIC

DTC	Display Item	Malfunction detected condition	Possible causes
C1109	BATTERY VOLTAGE [ABNORMAL]	When ignition voltage is 10 V or less. When ignition voltage is 16 V or more.	Harness or connector ABS actuator and electric unit (control unit) Fuse Ignition power supply system Battery

DTC CONFIRMATION PROCEDURE

1.CHECK SELF DIAGNOSTIC RESULT

With CONSULT.

Turn the ignition switch ON.
Perform self diagnostic result.

Is DTC C1109 detected? YES >> Proceed to diagnosis procedure. Refer to BRC-62, "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) connectors.
Check connectors 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) ignition power supply circuit

Check voltage between abs actuator and electric unit (control unit) connector e33 terminal 28 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

Turn ignition switch OFF.

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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