Nissan Altima HL32 Hybrid. Instruction - part 129

C1235, C1236, C1238, C1239, C1275, C1276, C1277, C1278

BRC-81

< COMPONENT DIAGNOSIS >

[VDC/TCS/ABS]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

N

O

P

RH

LH

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace harness or connector.

5.

RECONFIRM DTC

1. Reconnect the skid control sensor wire.

2. Reconnect the brake ECU connectors and the wheel sensor connector.

3. Clear the DTC.

4. Turn the ignition switch ON (READY).

5. Drive the vehicle at the speed of 20 km/h (12 MPH) or more for at least 60 seconds.

6. Check if the same DTC is recorded.

Result

A

>> GO TO 6.

B

>> GO TO 7.

C

>> Check for intermittent problems (symptom simulation).

6.

CHECK FRONT WHEEL SENSOR TIP

1. Turn the ignition switch OFF.

2. Remove the front wheel sensor.

3. Check the wheel sensor tip.

NOTE:

• No scratches or foreign matter on the sensor tip.

• Check the wheel sensor signal after cleaning or replacement.

Is the inspection result normal?

Brake ECU

Wheel sensor

—

Condition

Specified condition

Connector

Terminal

Connector

Terminal

E60

30

E41

1

—

Always

Below 1 

Ω

E60

30

—

—

Ground

Always

10 k

Ω or higher

E60

17

E41

2

—

Always

Below 1 

Ω

E60

17

—

—

Ground

Always

10 k

Ω or higher

E61

79

B43

3

—

Always

Below 1 

Ω

E61

79

—

—

Ground

Always

10 k

Ω or higher

E61

66

B43

4

—

Always

Below 1 

Ω

E61

66

—

—

Ground

Always

10 k

Ω or higher

Brake ECU

Wheel sensor

—

Condition

Specified condition

Connector

Terminal

Connector

Terminal

E61

76

E19

1

—

Always

Below 1 

Ω

E61

76

—

—

Ground

Always

10 k

Ω or higher

E61

64

E19

2

—

Always

Below 1 

Ω

E61

64

—

—

Ground

Always

10 k

Ω or higher

E60

34

B43

1

—

Always

Below 1 

Ω

E60

34

—

—

Ground

Always

10 k

Ω or higher

E60

33

B43

2

—

Always

Below 1 

Ω

E60

33

—

—

Ground

Always

10 k

Ω or higher

Condition

Proceed to

DTCs (C1235, C1236, C1238 and/or C1239) are output (for front).

A

DTCs (C1235, C1236, C1238 and/or C1239) are output (for rear).

B

DTCs (C1235, C1236, C1238 and/or C1239) are not output.

C

BRC-82

< COMPONENT DIAGNOSIS >

[VDC/TCS/ABS]

C1235, C1236, C1238, C1239, C1275, C1276, C1277, C1278

YES

>> GO TO 7.

NO

>> Clean or replace front wheel sensor.

7.

CHECK EACH WHEEL SENSOR ROTOR

1. Turn the ignition switch OFF.

2. Remove each wheel sensor rotor.

3. Check the wheel sensor rotor.

NOTE:

• No scratches, missing teeth or foreign matter on the rotors.

• Check the wheel sensor signal after cleaning or replacement.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Clean or replace each wheel sensor rotor.

8.

RECONFIRM DTC

1. Install the front wheel sensor and the wheel sensor rotor.

2. Clear the DTC.

3. Turn the ignition switch ON (READY).

4. Drive the vehicle at the speed of 20 km/h (12 MPH) or more for at least 60 seconds.

5. Check if the same DTC is recorded.

Result

A

>> Check for intermittent problems (symptom simulation).

B

>> Replace brake ECU.

Special Repair Requirement

INFOID:0000000004212662

1.

ZERO ADJUSTMENT FOR EACH SENSOR AND OFFSET LEANING FOR LINEAR SOLENOID VALVE

After erasing brake ECU memories, perform zero adjustment of following sensors and initialization of linear

solenoid valve.

• Steering angle sensor: 

BRC-9, "PERFORM ZERO POINT OF STEERING ANGLE SENSOR : Description"

.

• Yaw rate/side/decel G sensor: 

BRC-8, "PERFORM ZERO POINT OF YAW RATE/SIDE/DECEL G SENSOR

: Description"

.

• Brake stroke sensor: 

BRC-9, "PERFORM ADJUSTMENT OF STROKE SENSOR : Description"

.

• Linear solenoid valve: 

BRC-7, "PERFORM INITIALIZATION OF LINEAR SOLENOID VALVE AND CALI-

BRATION : Description"

.

>> END

Condition

Proceed to

DTCs (C1235, C1236, C1238 and/or C1239) are not output.

A

DTCs (C1235, C1236, C1238 and/or C1239) are output.

B

C1241, C1242

BRC-83

< COMPONENT DIAGNOSIS >

[VDC/TCS/ABS]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

N

O

P

C1241, C1242

Description

INFOID:0000000004212663

These codes are memorized when the power source voltage for the brake ECU drops or the voltage for the AB

S relay No.1 and ABS relay No.2 operation drops.

Codes may be memorized when the voltage of the auxiliary battery temporarily drops.

NOTE:

DTC C1256 (ACCUMULATOR LOW PRESSURE malfunction) may be memorized if the power source voltage

drops.

DTC Logic

INFOID:0000000004212664

DTC

INF code

Display item

DTC detection condition

Trouble area

C1241

81

POWER SUPPLY

System 1 is under the following conditions 
when the ignition switch is ON:
• Linear solenoid cannot receive enough cur-

rent (brake is applied).

• BS voltage is less than 8.9 V for at least 3 

seconds (brake is not applied).

• 12 V power source voltage inside ECU is 

less than 8.5 V when main relay is opened 
or VCM voltage is less than 4.7 V or 5.3 V 
or more for at least 0.05 seconds.

• Auxiliary battery
• ABS relay No.1
• ABS relay No.1 circuit
• Brake Capacitor
• Hybrid control system 

(Charging circuit)

• Brake  ECU

82

System 2 is under the following conditions 
when the ignition switch is ON:
• Linear solenoid cannot receive enough cur-

rent (brake is applied).

• BS voltage is less than 8.9 V for at least 3 

seconds (brake is not applied).

• 12 V power source voltage inside ECU is 

less than 8.5 V when main relay is opened 
or VCM voltage is less than 4.7 V or 5.3 V 
or more for at least 0.05 seconds.

• Auxiliary battery
• ABS relay No.2
• ABS relay No.2 circuit
• Brake capacitor
• Hybrid control system 

(Charging circuit)

• Brake  ECU

83

Brake capacitor mode signal is received from 
brake control power supply for 3 seconds or 
more when the ignition switch is ON.

• Auxiliary battery
• Brake capacitor
• Hybrid control system 

(Charging circuit)

91

In system 1, 12 V power source voltage inside 
brake ECU is less than 8.5 V when vehicle 
speed is 3 km/h (1.9 MPH) or more for at least 
10 seconds.

• Auxiliary battery
• Hybrid control system 

(Charging circuit)

• ABS relay No.1 circuit
• Brake  ECU

92

In system 2, 12 V power source voltage inside 
brake ECU is less than 8.5 V when vehicle 
speed is 3 km/h (1.9 MPH) or more for at least 
10 seconds.

• Auxiliary battery
• Hybrid control system 

(Charging circuit)

• ABS relay No.2 circuit
• Brake  ECU

93

In system 1, 12 V power source voltage inside 
brake ECU is less than 8.5 V for at least 60 
seconds.

• Auxiliary battery
• Hybrid control system 

(Charging circuit)

• ABS relay No.1 circuit
• Brake  ECU

94

In system 2, 12 V power source voltage inside 
brake ECU is less than 8.5 V for at least 60 
seconds.

• Auxiliary battery
• Hybrid control system 

(Charging circuit)

• ABS relay No.2 circuit
• Brake  ECU

BRC-84

< COMPONENT DIAGNOSIS >

[VDC/TCS/ABS]

C1241, C1242

Diagnosis Procedure

INFOID:0000000004212665

CAUTION:

When replacing the brake ECU, perform initialization of linear solenoid valve and calibration.

1.

CHECK HYBRID CONTROL SYSTEM

Check if the hybrid control system DTC is output.

Result

A

>> GO  TO  2.

B

>> Inspect hybrid control system.

2.

CHECK AUXILIARY BATTERY

Check the auxiliary battery voltage.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Charge or replace auxiliary battery.

3.

INSPECT BRAKE ECU (IG AND +DI1 TERMINAL)

1. Disconnect the brake ECU connectors.

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

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace harness or connector (IG or +DI1 circuit).

4.

INSPECT BRAKE ECU (GND TERMINAL)

1. Disconnect the brake ECU connectors.

C1242

87

IG1/IG2

The power supply voltage is not applied to the 
IG1 terminal, power supply voltage is applied 
to the IG2 terminal, and DI1 terminal voltage is 
9.5 V or more for 4 seconds or more.

• Auxiliary battery
• IG1 power source cir-

cuit

• Hybrid control system 

(Charging circuit)

• Brake  ECU

88

The power supply voltage is applied to the IG1 
terminal, power supply voltage is applied to 
the IG2 terminal, and DI1 terminal voltage is 
9.5 V or more for 4 seconds or more.

• Auxiliary battery
• IG2 power source cir-

cuit

• Hybrid control system 

(Charging circuit)

• Brake  ECU

DTC

INF code

Display item

DTC detection condition

Trouble area

Condition

Proceed to

DTC is not output.

A

DTC is output.

B

Standard voltage

: 11 to 14 V

Brake ECU

Condition

Specified condition

Connector

Terminal

E60

29 – Ground

Ignition switch ON

10 to 16 V

E61

75 – Ground

Ignition switch ON

10 to 16 V

E60

16 – Ground

Always

10 to 16 V

E60

8 – Ground

Always

10 to 16 V

E61

58 – Ground

Always

10 to 16 V

JSFIA0342GB