Nissan Leaf. Manual - part 322

BRC-78

< DTC/CIRCUIT DIAGNOSIS >

[WITH VDC]

C1105, C1106, C1107, C1108 WHEEL SENSOR

• Physical damage

• Contamination
Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace as necessary.

4.

CHECK SENSOR ROTOR

Check sensor rotor for the following:

• Contamination

• Physical damage (missing teeth, cracks, etc.)

• Foreign material

• Looseness
Is the inspection result normal?

YES

>> Replace the wheel sensor. Refer to 

BRC-158, "FRONT WHEEL SENSOR : Removal and Installa-

tion"

 or 

BRC-159, "REAR WHEEL SENSOR : Removal and Installation"

. Then, GO TO 5.

NO

>> Repair or replace as necessary.

5.

CONFIRM REPAIR

 With CONSULT

1. Clear all DTCs.

2. Perform DTC confirmation procedure. Refer to 

BRC-73, "DTC Logic"

.

Does DTC C1105, C1106, C1107 or C1108 reset?

YES

>> Replace ABS actuator and electric unit (control unit). Refer to 

BRC-162, "Removal and Installa-

tion"

.

NO

>> Inspection End.

C1109 POWER AND GROUND SYSTEM

BRC-79

< DTC/CIRCUIT DIAGNOSIS >

[WITH VDC]

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BRC

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C1109 POWER AND GROUND SYSTEM

DTC Logic

INFOID:0000000010120058

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn power switch OFF and

wait at least 10 seconds before conducting the next test.

>> GO TO 2.

2.

CHECK DTC DETECTION

With CONSULT

1. Turn the power switch OFF 

→ ON.

CAUTION:

• Be sure to wait of 10 seconds after turning power switch OFF or ON.

• Set the vehicle to READY.

2. Repeat step 1 two or more times.

3. Perform “Self Diagnostic Result” of “ABS”.
Is DTC “C1109” detected?

YES

>> Proceed to 

BRC-79, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000010120059

Regarding Wiring Diagram information. Refer to 

BRC-58, "Wiring Diagram"

.

1.

CHECK CONNECTOR

1. Turn the power switch OFF.

2. Check the ABS actuator and electric unit (control unit) harness connector for disconnection or looseness.
Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace error-detected parts, securely lock the connector, and GO TO 2.

2.

PERFORM SELF DIAGNOSTIC

With CONSULT

1. Turn the power switch OFF 

→ ON.

CAUTION:

• Be sure to wait of 10 seconds after turning power switch OFF or ON.

• Set the vehicle to READY.

2. Repeat step 1 two or more times.

3. Perform “Self Diagnostic Result” of “ABS”.
Is DTC “C1109” detected?

YES

>> GO TO 3.

DTC

Display Item

Malfunction detected condition

Possible causes

C1109

BATTERY VOLTAGE [ABNOR-
MAL]

When power switch ON power supply voltage is in 
following state.
• Power switch ON power supply voltage: 10 V 

≥ 

Power switch ON power supply voltage.

• Power switch ON power supply voltage: 16 V 

≤ 

Power switch ON power supply voltage.

• Harness or connector
• ABS actuator and electric unit 

(control unit)

• Fuse
• Power switch ON power supply 

system

• 12V battery

BRC-80

< DTC/CIRCUIT DIAGNOSIS >

[WITH VDC]

C1109 POWER AND GROUND SYSTEM

NO

>> Inspection End.

3.

CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) POWER SWITCH ON POWER SUP-

PLY
1. Turn the power switch OFF.

2. Disconnect ABS actuator and electric unit (control unit) harness connector.

3. Check the voltage between ABS actuator and electric unit (control unit) harness connector and ground.

4. Turn the power switch ON.

CAUTION:

Never set the vehicle to READY.

5. Check the voltage between ABS actuator and electric unit (control unit) harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 4.

4.

CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) POWER SWITCH ON POWER SUP-

PLY CIRCUIT
1. Turn the power switch OFF.

2. Check the 10A fuse (#4).

3. Check the continuity and short circuit between ABS actuator and electric unit (control unit) harness con-

nector terminal (16) and 10A fuse (#4).

Is the inspection result normal?

YES

>> Perform trouble diagnosis for power switch ON power supply. Refer to 

PG-26, "Wiring Diagram—

On Power Supply—"

.

NO

>> Repair or replace error-detected parts.

5.

CHECK TERMINAL

Check the ABS actuator and electric unit (control unit) pin terminals for damage or loose connection with har-

ness connector.
Is the inspection result normal?

YES

>> Replace ABS actuator and electric unit (control unit). Refer to 

BRC-162, "Removal and Installa-

tion"

.

NO

>> Repair or replace error-detected parts.

6.

CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) GROUND CIRCUIT

1. Turn the power switch OFF.

2. Check the continuity between ABS actuator and electric unit (control unit) harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair or replace error-detected parts.

ABS actuator and electric unit (control unit)

—

Voltage

(Approx.)

Connector

Terminal

E35

16

Ground

0 V

ABS actuator and electric unit (control unit)

—

Voltage

(Approx.)

Connector

Terminal

E35

16

Ground

Battery voltage

ABS actuator and electric unit (control unit)

—

Continuity

Connector

Terminal

E35

3

Ground

Yes

4

C1110 ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)

BRC-81

< DTC/CIRCUIT DIAGNOSIS >

[WITH VDC]

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C1110 ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)

DTC Logic

INFOID:0000000010120060

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn power switch OFF and

wait at least 10 seconds before conducting the next test.

>> GO TO 2.

2.

CHECK DTC DETECTION

With CONSULT

1. Turn the power switch OFF 

→ ON.

CAUTION:

• Be sure to wait of 10 seconds after turning power switch OFF or ON.

• Set the vehicle to READY.

2. Repeat step 1 two or more times.

3. Perform “Self Diagnostic Result” of “ABS”.
Is DTC “C1110” detected?

YES

>> Proceed to 

BRC-81, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000010120061

1.

CHECK SELF DIAGNOSTIC RESULTS

Replace ABS actuator and electric unit (control unit) even if other display than “C1110” is displayed in “Self-

Diagnosis” of “ABS”.

>> Replace ABS actuator and electric unit (control unit). Refer to 

BRC-162, "Removal and Installa-

tion"

.

DTC

Display Item

Malfunction detected condition

Possible causes

C1110

CONTROLLER FAILURE

When there is an internal malfunction in the ABS ac-
tuator and electric unit (control unit).

ABS actuator and electric unit 
(control unit)