Content .. 176 177 178 179 ..

Nissan Leaf. Manual - part 178

ELECTRICALLY-DRIVEN INTELLIGENT BRAKE UNIT

BR-33

< ECU DIAGNOSIS INFORMATION >

ECU DIAGNOSIS INFORMATION

ELECTRICALLY-DRIVEN INTELLIGENT BRAKE UNIT

Reference Value

INFOID:0000000010122994

CONSULT DATA MONITOR STANDARD VALUE

NOTE:

The following table includes information (items) inapplicable to this vehicle. For information (items) applicable

to this vehicle, refer to CONSULT display items.

Monitor item

Condition

Reference values in normal operation

MASTER CYL PRESSURE

Gradually depress the brake pedal

Increases between 0.5

− 4.5 V according to

the depth of brake pedal depression.

MASTER CYL PRES (VDC)

Gradually depress the brake pedal

Increases between 0 – 25.6 MPa according
to the depth of brake pedal depression.

MOTOR TEMPERATURE

Always

239

°F (115 °C) or less

CONTROL MODULE TEMP

Always

302

°F (150 °C) or less

MST CYL PRES POWER VOLT

Always

4.75

− 5.25 V

STROKE SEN 1 POWER VOLT

Always

4.75

− 5.25 V

MOTOR POWER SUPPLY

Always

− 16 V

CONTROL MODULE POWER

Always

− 16 V

STROKE SEN 1 LEARN VALUE

Always

43.32

− 64.76 deg

STROKE SEN 2 LEARN VALUE

Always

(–2.37)

− 20.74 deg

STROKE SEN 1 OUTPUT VOLT

Gradually depress the brake pedal

Increases between 0.51

− 4.59 V according

to the depth of brake pedal depression.

ALL SENSOR LEARNING

Learning not completed

INCOMP

Learning completed

COMP

STEERING ANGLE SENSOR

When driving straight

±3.5°

When steering wheel is steered to LH
by 90

Approx.

−90°

When steering wheel is steered to RH
by 90

Approx. +90

DECEL G SENSOR

Vehicle stopped

Approx. 0 G

During acceleration

Positive value

During deceleration

Negative value

SIDE G SENSOR

Vehicle stopped

Approx. 0 G

Right turn

Negative value

Left turn

Positive value

YAW RATE SENSOR SIGNAL

Vehicle stopped

Approx. 0 deg/s

Right turn

Negative value

Left turn

Positive value

WHEEL SENSOR FRONT RH

Vehicle stopped

0 rpm

Driving

Increases according to vehicle speed.

WHEEL SENSOR FRONT LH

Vehicle stopped

0 rpm

Driving

Increases according to vehicle speed.

WHEEL SENSOR REAR RH

Vehicle stopped

0 rpm

Driving

Increases according to vehicle speed.

BR-34

< ECU DIAGNOSIS INFORMATION >

ELECTRICALLY-DRIVEN INTELLIGENT BRAKE UNIT

WHEEL SENSOR REAR LH

Vehicle stopped

0 rpm

Driving

Increases according to vehicle speed.

VEHICLE SPEED

Vehicle stopped

0.00 km/h (0.00 MPH)

Driving

Almost same reading as speedometer (with-
in

±10%)

ACTUAL GEAR POSITION

D position

− 8

R position

N or P position

N/P

BRAKE SWITCH

Brake pedal is depressed.

Brake pedal is not depressed.

Off

COMMAND WAKE UP SLEEP

When command is not input from
BCM.

SLEEP

When command is input from BCM.

WAKEUP

DOOR SWITCH

After the all door is closed, 20 sec-
onds later from room lamp OFF

Any door is open

OPEN

IGNITION SIGNAL

Power switch ON

Power switch other than ON

Off

VCM STATUS

Active

In active

Off

BACKUP UNIT DIAG RESULT

Normal

NORMAL

Overvoltage

ERR1

Communications malfunction

ERR2

Charging circuit malfunction

ERR3

Discharge circuit open

ERR4

Discharge circuit shorted

ERR5

Cell malfunction

ERR6

Backup power circuit malfunction

ERR7

Start signal malfunction

ERR8

The control part is in abnormal condi-
tion

ERR9

Monitor circuit malfunction

ERR10

Insulation malfunction

ERR11

Output circuit malfunction (other than
discharge circuit)

ERR12

Temperature detection circuit mal-
function

ERR13

Deteriorated

ERR14

Outside the reference voltage

ERR15

BACKUP UNIT MODE

Backup power supply mode is active

Backup power supply mode is not ac-
tivated

Off

BACKUP UNIT CHG STATUS

80% or less (backup power supply not
possible)

CHRG1

− 99%(backup power supply possi-

ble)

CHRG2

100% (backup power supply possible) FULL

Monitor item

Condition

Reference values in normal operation

ELECTRICALLY-DRIVEN INTELLIGENT BRAKE UNIT

BR-35

< ECU DIAGNOSIS INFORMATION >

*1: The stroke sensor contains two circuits: stroke sensor 1 and stroke sensor 2.

*2: Learning for stroke sensor 1, stroke sensor 2, and master cylinder fluid pressure.

*3: Check tire pressure under normal conditions.

Fail-Safe

INFOID:0000000010122995

• When there is a malfunction in the power system of the electrically-driven intelligent brake unit (no voltage is

generated), voltage is temporarily supplied to the electrically-driven intelligent brake unit from the brake

power supply backup unit. At the same time, the brake warning lamp (red) and brake system warning lamp

(yellow) turn ON and the buzzer sounds.

• When a malfunction occurs in the electrically-driven intelligent brake unit, the VDC function performs control

(boost operation).

• When a malfunction occurs in the PDM (Power Delivery Module) and 12V battery, the braking force is deter-

mined by the force pressing on the brake pedal (no boost operation). At the same time, brake warning lamp

(red) and the brake system warning lamp (yellow) turn ON.

• When a malfunction occurs in the brake power supply backup unit, the brake system warning lamp (yellow)

turn ON.

• When a malfunction occurs in the electrically-driven intelligent brake and in the VDC function, the braking

force is determined by the force pressing on the brake pedal (no boost operation). At the same time, the

brake warning lamp (red) and brake system warning lamp (yellow) turn ON.

• When a malfunction occurs in the electrically-driven intelligent brake, VDC function, and power system,

cooperative regenerative brake control is not performed.

DRV TRQ CTRL VAL

Driving

Changes according to correction value of
drive torque.

DRV TRQ CTRL MODE

Driving

NOMAL

When drive torque control malfunction ERR1

Any condition listed below:
• Vehicle stopped.
• Malfunction in ABS actuator and

electric unit (control unit), VCM or
electrically-driven intelligent brake
unit.

• Activation of VDC function, TCS

function, ABS function or EBD func-
tion.

ERR2

Drive torque control is deactivated.

ERR3

DRV TRQ CTRL STP FLAG

Drive torque correction permission.

PERMIS

Drive torque correction cancellation.

CANCEL

Monitor item

Condition

Reference values in normal operation

DTC

Vehicle condition

C1A60

The following functions are suspended.
• Boost operation by the electrically-driven intelligent brake
• Cooperative regenerative brake control
• Power supply from the brake power supply backup unit

C1A61

C1A62

C1A63

The following function is suspended.
• Power supply from the brake power supply backup unit

C1A65

C1A67

Normal control

C1A69

BR-36

< ECU DIAGNOSIS INFORMATION >

ELECTRICALLY-DRIVEN INTELLIGENT BRAKE UNIT

C1A6B

The following function is suspended.
• Backup power supply from the brake power supply backup unit

C1A6C

C1A6D

C1A6E

The following function is suspended.
• Cooperative regenerative brake control
• hill start assist function

C1A6F

The following function is suspended.
• hill start assist function

C1A70

The following function is suspended.
• Cooperative regenerative brake control
• hill start assist function

C1A74

C1A80

C1A81

C1A82

C1A83

C1A84

C1A85

C1A86

C1A87

C1A88

C1A89

C1A8A

C1A8B

C1A90

C1A91

The following function is suspended.
• Cooperative regenerative brake control
• hill start assist function

C1A98

The following function is suspended.
• Power supply from the brake power supply backup unit

C1A99

C1A9A

C1AA0

C1AA1

C1AA2

C1AA3

C1AA9

The following function is suspended.
• Cooperative regenerative brake control
• hill start assist function

C1AB8

C1AB9

C1ABA

C1AC0

The following function is suspended.
• Cooperative regenerative brake control

C1AC1

The following functions are suspended.
• Boost operation by the electrically-driven intelligent brake

C1AC8

Normal control

C1AD0

DTC

Vehicle condition

Content .. 176 177 178 179 ..