Nissan Altima HL32 Hybrid. Manual - part 128
C1235, C1236, C1238, C1239, C1275, C1276, C1277, C1278
BRC-77
< COMPONENT DIAGNOSIS >
[VDC/TCS/ABS]
C
D
E
G
H
I
J
K
L
M
A
B
BRC
N
O
P
C1235, C1236, C1238, C1239, C1275, C1276, C1277, C1278
Description
INFOID:0000000004212659
The wheel sensors detect wheel speed and transmit the signals to the ECU. These signals are used for con-
trol of the ABS control system. Each of the front and rear rotors has 48 serrations.
When the rotors rotate, the magnetic field generated by the permanent magnet in the wheel sensor induces an
AC voltage.
Since the frequency of this AC voltage changes in direct proportion to the speed of the rotor, the frequency is
used by the ECU to detect the speed of each wheel.
When foreign matter adheres to the wheel sensor tip or wheel sensor rotor, or the rotor teeth are chipped,
these DTCs are output. An abnormal waveform input from the sensor determines these conditions.
These DTCs may be detected when a malfunction occurs in the connector terminals or wire harness of the
wheel sensor circuit.
DTCs C1275 to C1278 can be deleted when the wheel sensor sends a wheel speed signla or the Test Mode
ends. DTCs from C1275 to C1278 are output only in the Test Mode.
DTC Logic
INFOID:0000000004212660
NOTE:
• DTCs C1235 and C1275 are for the front wheel sensor RH.
• DTCs C1236 and C1276 are for the front wheel sensor LH.
• DTCs C1238 and C1277 are for the rear wheel sensor RH.
• DTCs C1239 and C1278 are for the rear wheel sensor LH.
Diagnosis Procedure
INFOID:0000000004212661
CAUTION:
When replacing the brake ECU, perform initialization of linear solenoid valve and calibration.
NOTE:
When C0200, C0205, C0210, or C0215 is output together with C1235, C1236, C1238, or C1239, inspect and
repair the trouble areas indicated by C0200, C0205, C0210, or C0215 first.
1.
RECONFIRM DTC
DTC
INF code
Display item
DTC detection condition
Trouble area
C1235
302
FR SPD FRAGMENT
Pulse waveform of wheel sensor signal is ab-
normal for at least 5 seconds when vehicle
speed is 20 km/h (12 MPH) or more.
• Front wheel sensor RH
• Wheel sensor circuit
• Sensor installation
• Wheel sensor rotor
• Brake ECU
C1236
303
FL SPD FRAGMENT
Pulse waveform of wheel sensor signal is ab-
normal for at least 5 seconds when vehicle
speed is 20 km/h (12 MPH) or more.
• Front wheel sensor LH
• Wheel sensor circuit
• Sensor installation
• Wheel sensor rotor
• Brake ECU
C1238
304
RR SPD FRAGMENT
Pulse waveform of wheel sensor signal is ab-
normal for at least 5 seconds when vehicle
speed is 20 km/h (12 MPH) or more.
• Rear wheel sensor RH
• Wheel sensor circuit
• Sensor installation
• Wheel sensor rotor
• Brake ECU
C1239
305
RL SPD FRAGMENT
Pulse waveform of wheel sensor signal is ab-
normal for at least 5 seconds when vehicle
speed is 20 km/h (12 MPH) or more.
• Rear wheel sensor LH
• Wheel sensor circuit
• Sensor installation
• Wheel sensor rotor
• Brake ECU
C1275
—
FR SPD OUTPUT HI
Detected only during Test Mode.
• Wheel sensor rotor
C1276
FL SPD OUTPUT HI
C1277
RR SPD OUTPUT HI
C1278
RL SPD OUTPUT HI