Nissan Leaf. Manual - part 327

BRC-98

< DTC/CIRCUIT DIAGNOSIS >

[WITH VDC]

C1116 STOP LAMP SWITCH

CAUTION:

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

3. Set the vehicle to READY.

CAUTION:

Stop the vehicle.

4. Select “ABS”, “Data Monitor” and “STOP LAMP SW” according to this order. Check that data monitor dis-

plays “On” or “Off” when brake pedal is depress or release. Refer to 

BRC-51, "Reference Value"

.

5. Select “ABS”, “Data Monitor” and “PRESS SENSOR” according to this order. Check that data monitor dis-

plays “5 bar” or less when brake pedal is depress. Refer to 

BRC-51, "Reference Value"

.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> GO TO 7.

7.

CHECK STOP LAMP SWITCH

Check the stop lamp switch. Refer to 

BRC-100, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> Replace stop lamp switch. Refer to 

BR-500, "Removal and Installation"

. GO TO 8.

8.

CHECK DATA MONITOR (3)

With CONSULT

1. Erase “Self Diagnostic Result” of “ABS”.

2. Turn the power switch OFF 

→ ON → OFF.

CAUTION:

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

3. Set the vehicle to READY.

CAUTION:

Stop the vehicle.

4. Select “ABS”, “Data Monitor” and “STOP LAMP SW” according to this order. Check that data monitor dis-

plays “On” or “Off” when brake pedal is depress or release. Refer to 

BRC-51, "Reference Value"

.

5. Select “ABS”, “Data Monitor” and “PRESS SENSOR” according to this order. Check that data monitor dis-

plays “5 bar” or less when brake pedal is depress. Refer to 

BRC-51, "Reference Value"

.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> GO TO 9.

9.

CHECK CONNECTOR AND TERMINAL

1. Turn the power switch OFF.

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

3. Check the ABS actuator and electric unit (control unit) harness connector for disconnection or looseness.

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

harness connector.

5. Disconnect stop lamp switch harness connector.

6. Check the stop lamp switch harness connector for disconnection or looseness.

7. Check the stop lamp switch pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?

YES

>> GO TO 11.

NO

>> Repair or replace error-detected parts. GO TO 10.

10.

CHECK DATA MONITOR (4)

With CONSULT

1. Connect ABS actuator and electric unit (control unit) harness connector.

2. Connect stop lamp switch harness connector.

3. Erase “Self Diagnostic Result” of “ABS”.

4. Turn the power switch OFF 

→ ON → OFF.

CAUTION:

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

5. Set the vehicle to READY.

CAUTION:

C1116 STOP LAMP SWITCH

BRC-99

< DTC/CIRCUIT DIAGNOSIS >

[WITH VDC]

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Stop the vehicle.

6. Select “ABS”, “Data Monitor” and “STOP LAMP SW” according to this order. Check that data monitor dis-

plays “On” or “Off” when brake pedal is depress or release. Refer to 

BRC-51, "Reference Value"

.

7. Select “ABS”, “Data Monitor” and “PRESS SENSOR” according to this order. Check that data monitor dis-

plays “5 bar” or less when brake pedal is depress. Refer to 

BRC-51, "Reference Value"

.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> GO TO 11.

11.

CHECK STOP LAMP SWITCH CIRCUIT (1)

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.

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

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. GO TO 12.

12.

CHECK STOP LAMP SWITCH CIRCUIT (2)

1. Turn the power switch OFF.

2. Disconnect stop lamp switch harness connector.

3. Check the continuity between ABS actuator and electric unit (control unit) harness connector and stop

lamp switch harness connector.

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

ground.

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. GO TO 13.

13.

CHECK DATA MONITOR (5)

With CONSULT

1. Connect ABS actuator and electric unit (control unit) harness connector.

ABS actuator and electric unit (control unit)

—

Condition

Voltage

(Approx.)

Connector

Terminal

E35

8

Ground

Brake pedal depressed

Battery voltage

Brake pedal not depressed

0 V

ABS actuator and electric unit (control unit)

—

Condition

Voltage

(Approx.)

Connector

Terminal

E35

8

Ground

Brake pedal depressed

Battery voltage

Brake pedal not depressed

0 V

ABS actuator and electric unit (control unit)

Stop lamp switch

Continuity

Connector

Terminal

Connector

Terminal

E35

8

E102

2

Yes

ABS actuator and electric unit (control unit)

—

Continuity

Connector

Terminal

E35

8

Ground

No

BRC-100

< DTC/CIRCUIT DIAGNOSIS >

[WITH VDC]

C1116 STOP LAMP SWITCH

2. Erase “Self Diagnostic Result” of “ABS”.

3. Turn the power switch OFF 

→ ON → OFF.

CAUTION:

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

4. Set the vehicle to READY.

CAUTION:

Stop the vehicle.

5. Select “ABS”, “Data Monitor” and “STOP LAMP SW” according to this order. Check that data monitor dis-

plays “On” or “Off” when brake pedal is depress or release. Refer to 

BRC-51, "Reference Value"

.

6. Select “ABS”, “Data Monitor” and “PRESS SENSOR” according to this order. Check that data monitor dis-

plays “5 bar” or less when brake pedal is depress. Refer to 

BRC-51, "Reference Value"

.

Is the inspection result normal?

YES

>> Inspection End.

NO

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

BRC-162, "Removal and Installa-

tion"

.

Component Inspection

INFOID:0000000010120070

1.

CHECK STOP LAMP SWITCH

1. Turn the power switch OFF.

2. Disconnect stop lamp switch harness connector.

3. Check the continuity when stop lamp switch is operated.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Replace stop lamp switch. Refer to 

BR-500, "Removal and Installation"

.

Stop lamp switch

Condition

Continuity

Terminal

1 – 2

When stop lamp switch is released

(When brake pedal is depressed)

Yes

When stop lamp switch is pressed

(When brake pedal is released)

No

C1120, C1122, C1124, C1126 ABS IN VALVE SYSTEM

BRC-101

< DTC/CIRCUIT DIAGNOSIS >

[WITH VDC]

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C1120, C1122, C1124, C1126 ABS IN VALVE SYSTEM

DTC Logic

INFOID:0000000010120071

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 “C1120”, “C1122”, “C1124” or “C1126” detected?

YES

>> Proceed to 

BRC-101, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000010120072

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 DIAGNOSIS

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”.

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
• 12V battery power supply sys-

tem

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.