Nissan Leaf. Instruction — part 170

BR-1

BRAKES

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SECTION

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CONTENTS

BRAKE SYSTEM

PRECAUTION . . . . . . . . . . . ...

5

PRECAUTIONS . . . . . . . . . . . . ...

5

Precaution for Technicians Using Medical Electric

. ..

5

Point to Be Checked Before Starting Maintenance
Work . . . . . . . . . . . . . . . . . . ..

5

Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" . . . . . . . . . . . . . . . . ...

5

Precaution for Removing 12V Battery . . . . . ...

6

Precaution for Procedure without Cowl Top Cover . ..

6

Precaution for Brake System . . . . . . . . ....

7

Precaution for Harness Repair . . . . . . . . ..

8

PREPARATION . . . . . . . . . . .

9

PREPARATION . . . . . . . . . . . . ...

9

Special Service Tool . . . . . . . . . . . .....

9

Commercial Service Tools . . . . . . . . . ....

9

SYSTEM DESCRIPTION . . . . . . . .

10

COMPONENT PARTS . . . . . . . . . ...

10

Component Parts Location . . . . . . . . . ..

10

Electrically-driven Intelligent Brake Unit . . . . ..

12

Stroke Sensor . . . . . . . . . . . . . . .

13

Warning Buzzer . . . . . . . . . . . . . ...

13

Brake Power Supply Backup Unit . . . . . . ...

13

SYSTEM . . . . . . . . . . . . . . . .

14

System Description . . . . . . . . . . . . .

14

Fail-Safe . . . . . . . . . . . . . . . . ..

16

COOPERATIVE REGENERATIVE BRAKE FUNC-
TION . . . . . . . . . . . . . . . . . . ...

18

COOPERATIVE REGENERATIVE BRAKE
FUNCTION : System Description . . . . . . .

18

HILL START ASSIST FUNCTION . . . . . . . .

22

hill start assist FUNCTION : System Description .

22

WARNING/INDICATOR/CHIME LIST . . . . . ...

24

WARNING/INDICATOR/CHIME LIST : Warning
Lamp/Indicator Lamp . . . . . . . . . . . ...

24

WARNING/INDICATOR/CHIME LIST : Brake
System Warning Lamp (Yellow) . . . . . . . ..

24

WARNING/INDICATOR/CHIME LIST : Brake
Warning Lamp (Red) . . . . . . . . . . . ...

26

DIAGNOSIS SYSTEM (ELECTRICALLY-
DRIVEN INTELLIGENT BRAKE UNIT) . . .

29

CONSULT Function . . . . . . . . . . . . .

29

ECU DIAGNOSIS INFORMATION . . . ..

33

ELECTRICALLY-DRIVEN INTELLIGENT
BRAKE UNIT . . . . . . . . . . . . . .

33

Reference Value . . . . . . . . . . . . . ..

33

Fail-Safe . . . . . . . . . . . . . . . . ..

35

DTC Inspection Priority Chart . . . . . . . . ..

37

DTC Index . . . . . . . . . . . . . . . ...

38

WIRING DIAGRAM . . . . . . . . . ..

40

BRAKE SYSTEM . . . . . . . . . . . ..

40

Wiring Diagram . . . . . . . . . . . . . .

40

BASIC INSPECTION . . . . . . . . ...

49

DIAGNOSIS AND REPAIR WORK FLOW . ...

49

Work Flow . . . . . . . . . . . . . . . .

49

Diagnostic Work Sheet . . . . . . . . . . .

50

ADDITIONAL SERVICE WHEN REPLACING
ELECTRICALLY-DRIVEN INTELLIGENT
BRAKE UNIT . . . . . . . . . . . . . .

52

Description . . . . . . . . . . . . . . . ...

52

STROKE SENSOR 0 POINT LEARNING . . .

53

Description . . . . . . . . . . . . . . . ...

53

Work Procedure . . . . . . . . . . . . . ...

53

DTC/CIRCUIT DIAGNOSIS . . . . . . .

56

BR-2

C1A60 CONTROL MODULE . . . . . . . .

56

DTC Logic . . . . . . . . . . . . . . . ...

56

Diagnosis Procedure . . . . . . . . . . . ..

56

C1A61 MOTOR . . . . . . . . . . . . ..

64

DTC Logic . . . . . . . . . . . . . . . ...

64

Diagnosis Procedure . . . . . . . . . . . ..

64

C1A62 CONTROL MODULE . . . . . . . .

72

DTC Logic . . . . . . . . . . . . . . . ...

72

Diagnosis Procedure . . . . . . . . . . . ..

72

C1A63 BRAKE POWER SUPPLY BACKUP
UNIT . . . . . . . . . . . . . . . . ...

81

DTC Logic . . . . . . . . . . . . . . . ...

81

Diagnosis Procedure . . . . . . . . . . . ..

82

C1A65 INCOMPLETE STROKE SENSOR . ...

90

DTC Logic . . . . . . . . . . . . . . . ...

90

Diagnosis Procedure . . . . . . . . . . . ..

90

C1A67 STOP LAMP SWITCH . . . . . . .

102

DTC Logic . . . . . . . . . . . . . . . ..

102

Diagnosis Procedure . . . . . . . . . . . .

102

Component Inspection . . . . . . . . . . ...

112

C1A69 MOTOR . . . . . . . . . . . .

114

DTC Logic . . . . . . . . . . . . . . . ..

114

Diagnosis Procedure . . . . . . . . . . . .

114

C1A6B BRAKE POWER SUPPLY BACKUP
UNIT . . . . . . . . . . . . . . . . .

123

DTC Logic . . . . . . . . . . . . . . . ..

123

Diagnosis Procedure . . . . . . . . . . . .

123

C1A6C BRAKE POWER SUPPLY BACKUP
UNIT . . . . . . . . . . . . . . . . .

133

DTC Logic . . . . . . . . . . . . . . . ..

133

Diagnosis Procedure . . . . . . . . . . . .

134

C1A6D BRAKE POWER SUPPLY BACKUP
UNIT . . . . . . . . . . . . . . . . .

142

DTC Logic . . . . . . . . . . . . . . . ..

142

Diagnosis Procedure . . . . . . . . . . . .

142

C1A6E EV SYSTEM . . . . . . . . . .

150

DTC Logic . . . . . . . . . . . . . . . ..

150

Diagnosis Procedure . . . . . . . . . . . .

150

C1A6F VCM SYSTEM . . . . . . . . . .

159

DTC Logic . . . . . . . . . . . . . . . ..

159

Diagnosis Procedure . . . . . . . . . . . .

159

C1A70 BRAKE CONTROL SYSTEM . . . ..

168

DTC Logic . . . . . . . . . . . . . . . ..

168

Diagnosis Procedure . . . . . . . . . . . .

168

C1A74 STEERING ANGLE SENSOR . . . .

177

DTC Logic . . . . . . . . . . . . . . . ..

177

Diagnosis Procedure . . . . . . . . . . . .

177

C1A80 CONTROL MODULE . . . . . . ...

185

DTC Logic . . . . . . . . . . . . . . . .

185

Diagnosis Procedure . . . . . . . . . . . .

185

C1A81 CONTROL MODULE . . . . . . .

193

DTC Logic . . . . . . . . . . . . . . . .

193

Diagnosis Procedure . . . . . . . . . . . .

193

C1A82 CONTROL MODULE . . . . . . .

201

DTC Logic . . . . . . . . . . . . . . . .

201

Diagnosis Procedure . . . . . . . . . . . .

201

C1A83 CONTROL MODULE . . . . . . .

209

DTC Logic . . . . . . . . . . . . . . . .

209

Diagnosis Procedure . . . . . . . . . . . .

209

C1A84 CONTROL MODULE . . . . . . .

217

DTC Logic . . . . . . . . . . . . . . . .

217

Diagnosis Procedure . . . . . . . . . . . .

217

C1A85 CONTROL MODULE . . . . . . .

225

DTC Logic . . . . . . . . . . . . . . . .

225

Diagnosis Procedure . . . . . . . . . . . .

226

C1A86 CONTROL MODULE . . . . . . .

233

DTC Logic . . . . . . . . . . . . . . . .

233

Diagnosis Procedure . . . . . . . . . . . .

234

C1A87 CONTROL MODULE . . . . . . .

241

DTC Logic . . . . . . . . . . . . . . . .

241

Diagnosis Procedure . . . . . . . . . . . .

241

C1A88 CONTROL MODULE . . . . . . .

249

DTC Logic . . . . . . . . . . . . . . . .

249

Diagnosis Procedure . . . . . . . . . . . .

249

C1A89 CONTROL MODULE . . . . . . .

257

DTC Logic . . . . . . . . . . . . . . . .

257

Diagnosis Procedure . . . . . . . . . . . .

257

C1A8A CONTROL MODULE . . . . . . ...

265

DTC Logic . . . . . . . . . . . . . . . .

265

Diagnosis Procedure . . . . . . . . . . . .

265

C1A8B CONTROL MODULE . . . . . . ...

273

DTC Logic . . . . . . . . . . . . . . . .

273

Diagnosis Procedure . . . . . . . . . . . .

273

C1A90 CONTROL MODULE . . . . . . .

281

DTC Logic . . . . . . . . . . . . . . . .

281

Diagnosis Procedure . . . . . . . . . . . .

281

C1A91 CONTROL MODULE . . . . . . .

290

DTC Logic . . . . . . . . . . . . . . . .

290

Diagnosis Procedure . . . . . . . . . . . .

290

C1A98 BRAKE POWER SUPPLY BACKUP
UNIT . . . . . . . . . . . . . . . . ..

299

DTC Logic . . . . . . . . . . . . . . . .

299

Diagnosis Procedure . . . . . . . . . . . .

299

C1A99 BRAKE POWER SUPPLY BACKUP
UNIT . . . . . . . . . . . . . . . . ..

308

BR-3

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DTC Logic . . . . . . . . . . . . . . . .

308

Diagnosis Procedure . . . . . . . . . . . .

308

C1A9A BRAKE POWER SUPPLY BACKUP
UNIT . . . . . . . . . . . . . . . . ..

317

DTC Logic . . . . . . . . . . . . . . . .

317

Diagnosis Procedure . . . . . . . . . . . .

317

C1AA0 STROKE SENSOR . . . . . . . ..

326

DTC Logic . . . . . . . . . . . . . . . .

326

Diagnosis Procedure . . . . . . . . . . . .

326

C1AA1 STROKE SENSOR . . . . . . . ..

338

DTC Logic . . . . . . . . . . . . . . . .

338

Diagnosis Procedure . . . . . . . . . . . .

338

C1AA2 STROKE SENSOR . . . . . . . ..

350

DTC Logic . . . . . . . . . . . . . . . .

350

Diagnosis Procedure . . . . . . . . . . . .

350

C1AA3 STROKE SENSOR . . . . . . . ..

362

DTC Logic . . . . . . . . . . . . . . . .

362

Diagnosis Procedure . . . . . . . . . . . .

362

C1AA9 PRESSURE SENSOR . . . . . . .

374

DTC Logic . . . . . . . . . . . . . . . .

374

Diagnosis Procedure . . . . . . . . . . . .

374

C1AB8 MOTOR . . . . . . . . . . . .

384

DTC Logic . . . . . . . . . . . . . . . .

384

Diagnosis Procedure . . . . . . . . . . . .

385

C1AB9 MOTOR . . . . . . . . . . . .

393

DTC Logic . . . . . . . . . . . . . . . .

393

Diagnosis Procedure . . . . . . . . . . . .

393

C1ABA MOTOR . . . . . . . . . . . ...

402

DTC Logic . . . . . . . . . . . . . . . .

402

Diagnosis Procedure . . . . . . . . . . . .

402

C1AC0 CONTROL MODULE . . . . . . ...

411

DTC Logic . . . . . . . . . . . . . . . .

411

Diagnosis Procedure . . . . . . . . . . . .

412

C1AC1 CONTROL MODULE . . . . . . ...

420

DTC Logic . . . . . . . . . . . . . . . .

420

Diagnosis Procedure . . . . . . . . . . . .

421

C1AC8 BRAKE POWER SUPPLY BACKUP
UNIT . . . . . . . . . . . . . . . . ..

429

DTC Logic . . . . . . . . . . . . . . . .

429

Diagnosis Procedure . . . . . . . . . . . .

429

C1AD0 BRAKE POWER SUPPLY BACKUP
UNIT . . . . . . . . . . . . . . . . ..

439

DTC Logic . . . . . . . . . . . . . . . .

439

Diagnosis Procedure . . . . . . . . . . . .

440

U1000 CAN COMM CIRCUIT . . . . . . ...

448

Description . . . . . . . . . . . . . . .

448

DTC Logic . . . . . . . . . . . . . . . .

448

Diagnosis Procedure . . . . . . . . . . . .

449

U1010 CONTROL UNIT (CAN) . . . . . ...

450

Description . . . . . . . . . . . . . . . .

450

DTC Logic . . . . . . . . . . . . . . . ..

450

Diagnosis Procedure . . . . . . . . . . . .

451

U1510 ABS ACTUATOR AND ELECTRIC
UNIT (CONTROL UNIT) COMMUNICATION .

452

DTC Logic . . . . . . . . . . . . . . . ..

452

Diagnosis Procedure . . . . . . . . . . . .

452

U1511 BRAKE POWER SUPPLY BACKUP
UNIT COMMUNICATION . . . . . . . .

460

DTC Logic . . . . . . . . . . . . . . . ..

460

Diagnosis Procedure . . . . . . . . . . . .

460

POWER SUPPLY AND GROUND CIRCUIT ..

470

Diagnosis Procedure . . . . . . . . . . . .

470

WARNING BUZZER . . . . . . . . . .

474

Diagnosis Procedure . . . . . . . . . . . .

474

Component Inspection . . . . . . . . . . ...

474

BRAKE WARNING LAMP . . . . . . . ..

476

Component Function Check . . . . . . . . ..

476

Diagnosis Procedure . . . . . . . . . . . .

476

BRAKE SYSTEM WARNING LAMP . . . ..

477

Component Function Check . . . . . . . . ..

477

Diagnosis Procedure . . . . . . . . . . . .

477

SYMPTOM DIAGNOSIS . . . . . . .

478

NOISE, VIBRATION AND HARSHNESS
(NVH) TROUBLESHOOTING . . . . . . .

478

NVH Troubleshooting Chart . . . . . . . . ..

478

UNEXPECTED BRAKE PEDAL REACTION .

479

Description . . . . . . . . . . . . . . . .

479

Diagnosis Procedure . . . . . . . . . . . .

479

THE BRAKING DISTANCE IS LONG . . . .

480

Description . . . . . . . . . . . . . . . .

480

Diagnosis Procedure . . . . . . . . . . . .

480

VEHICLE JERKS DURING . . . . . . . .

487

Description . . . . . . . . . . . . . . . .

487

Diagnosis Procedure . . . . . . . . . . . .

487

NORMAL OPERATING CONDITION . . . .

489

Description . . . . . . . . . . . . . . . .

489

PERIODIC MAINTENANCE . . . . . ..

490

BRAKE PEDAL . . . . . . . . . . . ...

490

Inspection and Adjustment . . . . . . . . .

490

BRAKE FLUID . . . . . . . . . . . .

493

Inspection . . . . . . . . . . . . . . . ..

493

Draining . . . . . . . . . . . . . . . . .

493

Refilling . . . . . . . . . . . . . . . . ..

493

Bleeding Brake System . . . . . . . . . . .

494

BR-4

ELECTRICALLY-DRIVEN INTELLIGENT
BRAKE UNIT . . . . . . . . . . . . ...

495

Inspection . . . . . . . . . . . . . . . ..

495

FRONT DISC BRAKE . . . . . . . . . ..

496

BRAKE PAD . . . . . . . . . . . . . . .

496

BRAKE PAD : Inspection and Adjustment . . . .

496

DISC ROTOR . . . . . . . . . . . . . . ...

496

DISC ROTOR : Inspection and Adjustment . . ...

496

REAR DISC BRAKE . . . . . . . . . .

498

BRAKE PAD . . . . . . . . . . . . . . .

498

BRAKE PAD : Inspection and Adjustment . . . .

498

DISC ROTOR . . . . . . . . . . . . . . ...

498

DISC ROTOR : Inspection and Adjustment . . ...

498

REMOVAL AND INSTALLATION . . . ..

500

BRAKE PEDAL . . . . . . . . . . . ...

500

Exploded View . . . . . . . . . . . . . ...

500

Removal and Installation . . . . . . . . . ...

500

Inspection and Adjustment . . . . . . . . .

501

BRAKE PIPING . . . . . . . . . . . ...

503

FRONT . . . . . . . . . . . . . . . . . .

503

FRONT : Exploded View . . . . . . . . . ...

503

FRONT : Hydraulic Piping . . . . . . . . . .

504

FRONT : Removal and Installation . . . . . .

504

FRONT : Inspection . . . . . . . . . . . ...

506

REAR . . . . . . . . . . . . . . . . . .

506

REAR : Exploded View . . . . . . . . . . ..

506

REAR : Hydraulic Piping . . . . . . . . . .

507

REAR : Removal and Installation . . . . . . ..

507

REAR : Inspection . . . . . . . . . . . . .

509

ELECTRICALLY-DRIVEN INTELLIGENT
BRAKE UNIT . . . . . . . . . . . . ...

510

Exploded View . . . . . . . . . . . . . ...

510

Removal and installation . . . . . . . . . ...

510

Inspection and Adjustment . . . . . . . . .

512

BRAKE POWER SUPPLY BACKUP UNIT . .

513

Exploded View . . . . . . . . . . . . . ..

513

Removal and Installation . . . . . . . . . ...

513

WARNING BUZZER . . . . . . . . . . .

515

Removal and Installation . . . . . . . . . ...

515

FRONT DISC BRAKE . . . . . . . . . ..

516

BRAKE PAD . . . . . . . . . . . . . . .

516

BRAKE PAD : Exploded View . . . . . . . ...

516

BRAKE PAD : Removal and Installation . . . ...

516

BRAKE PAD : Inspection . . . . . . . . . ..

517

BRAKE CALIPER ASSEMBLY . . . . . . . ..

518

BRAKE CALIPER ASSEMBLY : Exploded View ..

518

BRAKE CALIPER ASSEMBLY : Removal and In-
stallation . . . . . . . . . . . . . . . .

518

BRAKE CALIPER ASSEMBLY : Disassembly and
Assembly . . . . . . . . . . . . . . . ..

520

BRAKE CALIPER ASSEMBLY : Inspection . . ..

521

REAR DISC BRAKE . . . . . . . . . . .

522

BRAKE PAD . . . . . . . . . . . . . . .

522

BRAKE PAD : Exploded View . . . . . . . ...

522

BRAKE PAD : Removal and Installation . . . ...

522

BRAKE PAD : Inspection . . . . . . . . . ..

524

BRAKE CALIPER ASSEMBLY . . . . . . . ..

524

BRAKE CALIPER ASSEMBLY : Exploded View ..

525

BRAKE CALIPER ASSEMBLY : Removal and In-
stallation . . . . . . . . . . . . . . . .

526

BRAKE CALIPER ASSEMBLY : Disassembly and
Assembly . . . . . . . . . . . . . . . ..

527

BRAKE CALIPER ASSEMBLY : Inspection . . ..

529

SERVICE DATA AND SPECIFICATIONS
(SDS) . . . . . . . . . . . . . . .

530

SERVICE DATA AND SPECIFICATIONS
(SDS) . . . . . . . . . . . . . . . .

530

General Specifications . . . . . . . . . . ..

530

Brake Pedal . . . . . . . . . . . . . . ..

530

Electrically-driven Intelligent Brake . . . . . ...

531

Front Disc Brake . . . . . . . . . . . . ...

531

Rear Disc Brake . . . . . . . . . . . . .

531