Nissan Altima HL32 Hybrid. Manual - part 157

BRAKE ECU

BRC-193

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[VDC/TCS/ABS]

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ON-VEHICLE MAINTENANCE

BRAKE ECU

Inspection

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INSPECT BRAKE ECU

1. Measure the voltage between each terminal or between each terminal and body ground.
2. Connect the CONSULT-III, and check the communication condition with the brake ECU.

CAUTION:

• Inspection should be performed from the back of the connector with the connected to the brake

ECU.

• The voltage between the terminals of the brake actuator assembly may become 0 V due to the fail

safe function when the brake warning lamp comes ON (malfunctioning).

BRC-194

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[VDC/TCS/ABS]

BRAKE ACTUATOR

BRAKE ACTUATOR

Inspection

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INSPECT BRAKE ACTUATOR ASSEMBLY OPERATION

1. On “DATA MONITOR”, select “FR WC PRESS”, “FL WC PRESS”, “RR WC PRESS” and “RL WC

PRESS”, and check the wheel cylinder pressure.

2. Check the output value of the wheel cylinder pressure sensor at each fluid pressure during the Electroni-

cally Controlled Brake control.

INSPECT BRAKE ACTUATOR ASSEMBLY

Measure the resistance according to the value(s) in the table below.

If the value is not as specified, replace the brake actuator assembly.

Tester display

Measurement item/

Range

Normal condition

Diagnostic note

FR WC 

PRESS

FR wheel cylinder 
pressure sensor/ min: 
0 V, max: 5 V

When brake pedal is 
released: 0.3 to 0.9 V

—

FL WC 

PRESS

FL wheel cylinder pres-
sure sensor/ min: 0 V, 
max: 5 V

When brake pedal is 
released: 0.3 to 0.9 V

—

RR WC 
PRESS

RR wheel cylinder 
pressure sensor/ min: 
0 V, max: 5 V

When brake pedal is 
released: 0.3 to 0.9 V

—

RL WC 

PRESS

RL wheel cylinder 
pressure sensor/ min: 
0 V, max: 5 V

When brake pedal is 
released: 0.3 to 0.9 V

—

Condition

Front wheel

Rear wheel

When fully depressing brake pedal with the vehicle 
stopped.

2.89 

±0.15 V 1.32 ±0.15 V

Tester connection

Condition

Specified condition

Brake actuator

Connector

Terminal

E91

32 – 2

Always

Below 10 

Ω

E91

31 – 2

Always

Below 10 

Ω

E91

32 – 31

Always

Below 1 

Ω

E91

1 – 2

Always

Below 1 

Ω

E91

32 – 3

Always

450 to 550 

Ω

E91

31 – 3

Always

450 to 550 

Ω

WHEEL SENSOR

BRC-195

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[VDC/TCS/ABS]

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WHEEL SENSOR

Inspection

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INSPECT FRONT WHEEL SENSOR

1. Inspect the front wheel sensor. If any of the following occurs, replace the front wheel sensor with a new

one:

• The surface of the front wheel sensor is cracked, dented, or chipped off.

• The connector or wire harness is scratched, cracked, or damaged.

• The front wheel sensor has been dropped.

2. Measure the resistance according to the value(s) in the table below.

RH

LH

If the value is not as specified, replace the front wheel sensor.

INSPECT REAR WHEEL SENSOR

1. Inspect the rear wheel sensor. If any of the following occurs, replace the rear wheel sensor with a new

one:

• The surface of the rear wheel sensor is cracked, dented, or chipped off.

• The connector is scratched, cracked, or damaged.

• The skid control sensor has been dropped.

2. Measure the resistance to the value(s) in the table below.

RH

LH

If the value is not as specified, replace rear wheel sensor.

Tester connection

—

Condition

Specified condition

Front wheel sensor

Connector

Terminal

E41

1 – 2

—

Always

Not existed

E41

1

Ground

Always

Existed

E41

2

Ground

Always

Existed

Tester connection

—

Condition

Specified condition

Front wheel sensor

Connector

Terminal

E19

1 – 2

—

Always

Not existed

E19

1

Ground

Always

Existed

E19

2

Ground

Always

Existed

Tester connection

—

Condition

Specified condition

Front wheel sensor

Connector

Terminal

B43

3 – 4

—

Always

Not existed

B43

3

Ground

Always

Existed

B43

4

Ground

Always

Existed

Tester connection

—

Condition

Specified condition

Front wheel sensor

Connector

Terminal

B43

1 – 2

—

Always

Not existed

B43

1

Ground

Always

Existed

B43

2

Ground

Always

Existed

BRC-196

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[VDC/TCS/ABS]

ABS RELAY NO. 1 AND NO. 2

ABS RELAY NO. 1 AND NO. 2

Inspection

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INSPECT ABS RELAY NO.1 AND NO.2

Measure the resistance according to the value(s) in the table below.

If the value is not as specified, replace the ABS relay No.1 or No.2.

Tester connection

Condition

Specified condition

1 – 2

Always

10 k

Ω or higher

1 – 2

Apply B+ between termi-

nal is 3 and 4

Below 1 

Ω