Nissan Altima HL32 Hybrid. Manual - part 144

U0073, U0123, U0124, U0126, U0293

BRC-141

< COMPONENT DIAGNOSIS >

[VDC/TCS/ABS]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

N

O

P

Diagnosis Procedure

INFOID:0000000004212737

1.

CHECK HARNESS AND CONNECTOR (MOMENTARY INTERRUPTION)

Using the “DATA MONITOR” of CONSULT-III, check for any momentary interruption in the wire harness and

connector corresponding to a DTC.

Result

A

>> GO TO 2.

B

>> GO TO 3.

C

>> GO TO 4.

2.

CHECK IF EACH SENSOR AND ECU CONNECTOR IS SUCURELY CONNECTED

1. Turn the ignition switch OFF.

2. Check if each sensor and ECU connector is securely connected.

NOTE:

The connector should be securely connected.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Connect connector to each sensor or ECU correctly.

U0293

152

LOST COMM(HV ECU)

With the IG1 terminal voltage 9.5 V or more for 
2 seconds or more, communication with the 
HV ECU remains invalid for 2 seconds or 
more.

• CAN communication 

system
(Brake ECU to HV 
ECU)

153

With the IG1 terminal voltage 9.5 V or more for 
2 seconds or more, communication with the 
HV ECU that occurs once or more within 5 
seconds charges from being valid communi-
cation to being invalid communication 10 
times or more within 1 minute.

154

with the IG1 terminal voltage 9.5 V or more for 
2 seconds or more, abnormal regenerative 
braking torque value or braking request torque 
value or abnormal shift position value is re-
ceived for 2 seconds or more.

155

With the IG1 terminal voltage 9.5 V or more for 
2 seconds or more, communication error mes-
sage from HV ECU is received for 5 seconds 
or more.

DTC

INF code

Display item

DTC detection condition

Trouble area

Tester display

Measurement item/ Range

Normal condition

HV COMM OPN

HV communication open detection/ 
ERROR or NORMAL

ERROR: Momentary in-
terruption
NORMAL: Normal

STRG SEN OPN

Steering sensor open detection/ 
ERROR or NORMAL

ERROR: Momentary in-
terruption
NORMAL: Normal

YAW SEN OPN

Yaw rate sensor open detection/ 
ERROR or NORMAL

ERROR: Momentary in-
terruption
NORMAL: Normal

Condition

Proceed to

There is a constant open circuit.

A

There are no momentary interruption.

B

There are momentary interruption.

C

BRC-142

< COMPONENT DIAGNOSIS >

[VDC/TCS/ABS]

U0073, U0123, U0124, U0126, U0293

3.

RECONFIRM DTC

1. Turn the ignition switch OFF.

2. Record the output DTCs (for ABS, VDC, Electronically Controlled Brake, and CAN communication).

NOTE:

If the CAN communication system DTC and the relevant sensor DTCs are output simultaneously, trouble-

shoot the relevant sensor DTCs (for ABS, VDC and Electronically Controlled Brake) after the CAN com-

munication system returns to normal.

Result

A

>> Inspect CAN communication system.

B

>> Repair circuit indicated by output DTC.

C

>> Check for intermittent problems (symptom simulation).

4.

REPAIR OR REPLACE HARNESS OR CONNECTOR

1. Turn the ignition switch OFF.

2. Repair or replace the harness or connector.

3. Check for any momentary interruption between the brake ECU and each sensor or ECU.

4. Check that there is no momentary interruption.

>> GO TO 5.

5.

RECONFIRM DTC

1. Turn the ignition switch OFF.

2. Clear the DTC.

3. Turn the ignition switch ON (READY).

4. Drive the vehicle and turn the steering wheel to the right and left at a speed of 15 km/h (9 MPH) or more.

5. Check that no CAN communication system DTC is output.

6. If ABS, VDC and Electronically Controlled Brake DTCs are output, record them.

Result

NOTE:

The CAN communication system must be normal when repairing each sensor DTC (for ABS, VDC and

Electronically Controlled Brake).

A

>> Inspect CAN communication system.

B

>> Repair circuit indicated by output DTC.

C

>> INSPECTION END

Condition

Proceed to

DTC (CAN communication system DTC) is output.

A

DTC (ABS, VDC and/or Electronically Controlled Brake DTC) is out-
put.

B

DTC is not output.

C

Condition

Proceed to

DTC output for the CAN communication system.

A

No DTC is output (ABS, VDC and/or Electronically Controlled Brake 
DTC is output).

B

No DTC is output (No ABS, VDC and/or Electronically Controlled 
Brake DTC is output).

C

ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)

BRC-143

< ECU DIAGNOSIS >

[VDC/TCS/ABS]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

N

O

P

ECU DIAGNOSIS

ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)

Reference Value

INFOID:0000000004212738

VALUES ON THE DIAGNOSIS TOOL

CAUTION:

The display shows the control unit calculation data, so a normal value might be displayed even in the

event the output circuit (harness) is open or short-circuited.

Monitor item

Condition

Value/Status

MTR RLY 1

ABS motor relay No.1: ON

ON

ABS motor relay No.1: OFF

OFF

STP LMP SW

Brake pedal is depressed

ON

Brake pedal is released

OFF

PKB SW

Parking brake is applied

ON

Parking brake is released

OFF

SHIFT LVR POS

Select lever position

1st
2nd
3rd
4th
5th
6th/B
D/M
P/N
R

1
2
3
4
5
6

D

P/N

R

VWFR

Wheel speed

Vehicle stopped

0 km/h (0 MPH)

Vehicle running

Nearly matches the speed 

meter display (

±10% or less)

VWFL

Wheel speed

Vehicle stopped

0 km/h (0 MPH)

Vehicle running

Nearly matches the speed 

meter display (

±10% or less)

VWRR

Wheel speed

Vehicle stopped

0 km/h (0 MPH)

Vehicle running

Nearly matches the speed 

meter display (

±10% or less)

VWRL

Wheel speed

Vehicle stopped

0 km/h (0 MPH)

Vehicle running

Nearly matches the speed 

meter display (

±10% or less)

G SEN 1

Vehicle stopped

0 G

Approximately 0 

±0.13 G while stationary

− 1.889 – 1.875 G 

Note 1

G SEN 2

Vehicle stopped

0 G

Approximately 0 

±0.13 G while stationary

− 1.889 – 1.875 G 

Note 1

VHCL SPD

Vehicle speed

Vehicle stopped

0 km/h (0 MPH)

Vehicle running

Nearly matches the speed 

meter display (

±10% or less)

YAW SEN 1

Vehicle stopped

0 deg/s

Vehicle turning

− 128 – 127 deg/s

YAW SEN 2

Vehicle stopped

0 deg/s

Vehicle turning

− 128 – 127 deg/s

BRC-144

< ECU DIAGNOSIS >

[VDC/TCS/ABS]

ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)

STRG ANG SEN

Straight-ahead

0 deg

Steering wheel turned (Left turn)

Increase

Steering wheel turned (Right turn)

Decrease

MC SEN COMP 1

Normal condition (reference value)

0 – 5 V

Brake pedal is released

0.3 – 0.9 V

ACCEL RATE

Accelerator pedal is released

0 %

Accelerator pedal is depressed

0 – 128 %

FR WH SEN OPN

Momentary interruption

ERROR

Normal

NORMAL

FL WH SEN OPN

Momentary interruption

ERROR

Normal

NORMAL

RR WH SEN OPN

Momentary interruption

ERROR

Normal

NORMAL

RL WH SEN OPN

Momentary interruption

ERROR

Normal

NORMAL

YAW SEN OPN

Momentary interruption

ERROR

Normal

NORMAL

G SEN OPN

Momentary interruption

ERROR

Normal

NORMAL

STRG SEN OPN

Momentary interruption

ERROR

Normal

NORMAL

MC SEN OPN

Momentary interruption

ERROR

Normal

NORMAL

HV COMM OPN

Momentary interruption

ERROR

Normal

NORMAL

DIAG CODE

Number of DTC

0 – 255

ABS WARN LMP

ABS warning lamp: ON

ON

ABS warning lamp: OFF

OFF

BRK WARN LMP

Brake warning lamp: ON

ON

Brake warning lamp: OFF

OFF

SLIP IND LMP

SLIP indicator lamp: ON

ON

SLIP indicator lamp: OFF

OFF

BUZZER

Brake warning buzzer: ON

ON

Brake warning buzzer: OFF

OFF

VDC WARN LMP

VDC warning lamp: ON

ON

VDC warning lamp: OFF

OFF

DVWFR

Front RH wheel acceleration

− 200.84 – 199.27 m/s

2

DVWFL

Front LH wheel acceleration

− 200.84 – 199.27 m/s

2

DVWRR

Rear RH wheel acceleration

− 200.84 – 199.27 m/s

2

DVWRL

Rear LH wheel acceleration

− 200.84 – 199.27 m/s

2

SIDE G SEN

Side G sensor status

− 25.11 – 24.91 m/s

2

DECEL G SEN

Decel G sensor status

− 25.11 – 24.91 m/s

2

YAW RATE VAL

Yaw rate sensor value

− 128 – 127 deg/s

Monitor item

Condition

Value/Status