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Nissan Altima HL32 Hybrid. Manual - part 121

DIAGNOSIS SYSTEM (VDC/TCS/ABS CONTROL UNIT)

BRC-49

< FUNCTION DIAGNOSIS >

[VDC/TCS/ABS]

BRC

FL OIL PRESS

FL wheel target oil pressure
reading

Min

0 MPa

Max

20 MPa

RR OIL PRESS

RR wheel target oil pressure
reading

Min

0 MPa

Max

20 MPa

RL OIL PRESS

RL wheel target oil pressure
reading

Min

0 MPa

Max

20 MPa

DETAIL CODE

Detailed code for Freeze Frame
DTC

Displays to output INF code

IG1 VOLT VAL

IG1 voltage value

Min

0 V

Max

20 V

IG2 VOLT VAL

IG2 voltage value

Min

0 V

Max

20 V

BS1

BS1 voltage value

Min

0 V

Max

20 V

BS2

BS2 voltage value

Min

0 V

Max

20 V

VM1

VM1 voltage value

Min

0 V

Max

20 V

VM2

VM2 voltage value

Min

0 V

Max

20 V

+B1 voltage value

Min

0 V

Max

20 V

+B2 voltage value

Min

0 V

Max

20 V

IG ON ELAPS

Elapsed time after ignition
switch ON

Min

0 seconds

Max

100,661.76 seconds

CAPAC MODE

Brake capacitor mode

Brake capacitor mode ON

Brake capacitor mode OFF

OFF

SCSS

Stroke simulator solenoid (SC-
SS) signal

Stroke simulator solenoid (SC-
SS) ON

Stroke simulator solenoid (SC-
SS) OFF

OFF

SMC 1

Master cut solenoid (SMC 1)
signal

Master cut solenoid (SMC 1)
ON

Master cut solenoid (SMC 1)
OFF

OFF

SNC 2

Master cut solenoid (SMC 2)
signal

Master cut solenoid (SMC 2)
ON

Master cut solenoid (SMC 2)
OFF

OFF

MAIN RLY 1

ABS relay No.1 signal

ABS relay No.1 ON

ABS relay No.1 OFF

OFF

MAIN RLY 2

ABS relay No.2 signal

ABS relay No.2 ON

ABS relay No.2 OFF

OFF

MOTOR RLY 1

ABS motor relay No.1 signal

ABS motor relay No.1 ON

ABS motor relay No.1 OFF

OFF

Tester display

Measurement item

Reference value

BRC-50

< FUNCTION DIAGNOSIS >

[VDC/TCS/ABS]

DIAGNOSIS SYSTEM (VDC/TCS/ABS CONTROL UNIT)

Clear Freeze Frame Data and Information

CAUTION:

Clearing the DTC will also clear the Freeze Frame Data and information (INF) cord.
1. Connect the CONSULT-III.
2. Turn the ignition switch ON.
3. Clear the DTC and Freeze Frame Data. Refer to

BRC-45, "CONSULT-III Function"

FAIL-SAFE CHART

Fail-Safe Function

1. If a malfunction occurs in the brake ECU, sensor signal, or actuator, rest normally operating parts will

maintain brake control.

2. When trouble occurs in the brake control system, the brake ECU turns the warning lamp ON, and prohibits

ABS, TCS and VDC operations.

ABS, EBD and BA system:

NOTE:
A malfunction in the ABS system will result in an identical operation, with ABS, TCS and VDC system control prohibited.

TCS and VDC system:

NOTE:
As for the TCS and VDC systems, different systems prohibit different controls depending on a malfunctioning part.

3. The brake ECU prevents operation of a malfunctioning hydraulic pressure system and continues brake

control with the normal hydraulic pressure system.

MOTOR RLY 2

ABS motor relay 2 signal

ABS motor relay No.2 ON

ABS motor relay No.2 OFF

OFF

RESERVOIR LVL

Brake fluid level switch signal

Brake fluid level switch ON

Brake fluid level switch OFF

OFF

Tester display

Measurement item

Reference value

JSFIA0067GB

Malfunction area

Control method

ABS system

ABS, TCS and VDC control prohibited

EBD system

ABS, EBD, TCS and VDC control prohibited

Malfunction area

Control method

Hybrid control system

(TCS and VDC systems)

Before control: Disables control
During control: Uses only the brakes to effect control

Brake control system

(TCS and VDC systems)

Before control: Disables control
During control: Disables control (by gradually ending control)

DIAGNOSIS SYSTEM (VDC/TCS/ABS CONTROL UNIT)

BRC-51

< FUNCTION DIAGNOSIS >

[VDC/TCS/ABS]

BRC

NOTE:

• If control of the Electronicaly Controlled Brake for any of the 4 wheels is prohibited, that wheel loses

brake booster function or braking ability.

• If one of the 4 wheels loses brake booster function, the feeling when depressing the brake pedal

changes.

• If control of the Electronicaly Controlled Brake for all wheels is prohibited, the 2 front wheels will lose

brake booster function.

4. If the brake control is stopped under such conditions as when trouble occurs with a hydraulic pressure

source, the pressure generated in the master cylinder by the driver is applied to the wheel cylinder to

ensure braking force.

5. A power back-up until is built in as an additional power source to supply stable power to the system.
6. If the regenerative brake alone does not operate under such conditions as a communication error with the

HV ECU, control is switched so that all braking force is generated with the hydraulic pressure brake.

DATA MONITOR

NOTE:

With the CONSULT-III connected to the DLC3 and the ignition switch ON, the Electronically Controlled Brake,

ABS, and VDC Data List can be displayed. Follow the prompts on the tester screen to access the Data List.

Malfunction area

Control method

Brake ECU

Normally operating parts will control brake and generate braking force

Hydraulic pressure controlling parts

Normally operating parts will control brake and generate braking force

Hydraulic pressure source

Braking force generate by the driver

Tester display

Measurement item/ Range

Normal condition

Diagnostic note

MTR RLY 1

ABS motor relay No.1 / ON or
OFF

ON: Motor relay ON
OFF: Motor relay OFF

—

STP LMP SW

Stop lamp switch / ON or OFF

ON: Brake pedal depressed
OFF: Brake pedal released

—

PKB SW

Parking brake switch / ON or
OFF

ON: Parking brake applied
OFF: Parking brake released

—

SHIFT LVR POS

Shift lever position information /
P/N, R, D/M, 1st – 6th/B, FAIL

—

VWFR

FR wheel sensor reading/ min:
0 km/h (0 MPH), max: 326 km/h
(202 MPH)

Actual wheel speed

Similar speed indicated on
speedometer

VWFL

FL wheel sensor reading/ min: 0
km/h (0 MPH), max: 326 km/h
(202 MPH)

Actual wheel speed

Similar speed indicated on
speedometer

VWRR

RR wheel sensor reading/ min:
0 km/h (0 MPH), max: 326 km/h
(202 MPH)

Actual wheel speed

Similar speed indicated on
speedometer

VWRL

RL wheel sensor reading/ min:
0 km/h (0 MPH), max: 326 km/h
(202 MPH)

Actual wheel speed

Similar speed indicated on
speedometer

G SEN 1

Acceleration sensor 1 reading /
min:

− 1.889 G, max: 1.875 G

Approximately 0

±0.13 G while sta-

tionary

Reading changes when ve-
hicle is bounced

G SEN 2

Acceleration sensor 2 reading /
min:

− 1.889 G, max: 1.875 G

Approximately 0

±0.13 G while sta-

tionary

Reading changes when ve-
hicle is bounced

VHCL SPD

Maximum wheel sensor reading
/ min: 0 km/h (0 MPH), max: 255
km/h (158 MPH)

Actual wheel speed

Speed indicated on speed-
ometer

YAW SEN 1

Yaw rate sensor 1 / min:

− 128

deg/s, max: 127 deg/s

Min:

− 128 deg/s

Max: 127 deg/s

—

YAW SEN 2

Yaw rate sensor 1 / min:

− 128

deg/s, max: 127 deg/s

Min:

− 128 deg/s

Max: 127 deg/s

—

BRC-52

< FUNCTION DIAGNOSIS >

[VDC/TCS/ABS]

DIAGNOSIS SYSTEM (VDC/TCS/ABS CONTROL UNIT)

STRG ANG SEN

Steering angle sensor / min:

−

3,276.8 deg, max: 3,276.7 deg

Left turn: Increase
Right turn: Decrease

—

MC SEN COMP 1

Master cylinder pressure sen-
sor 1 reading / min: 0 V, max: 5
V

When brake pedal is released: 0.3
to 0.9 V

Reading increases when
brake pedal is depressed

ACC VALU RATE

The difference of a present ac-
celerator / min: 0%, max: 128%

Min: 0%
Max: 128%

—

FR WH SEN OPN

FR wheel sensor open detec-
tion /ERROR or NORMAL