Isuzu N-Series. Service manual — part 271
5A4-58 ABS/ASR
17
Check the FR wheel speed sensor circuit.
(Refer to the check flow B-14.)
Is this step completed?
—
Check the repair.
—
18
Check the circuit for open circuit, and the con-
nector for improper connection between the
EHCU and the speed sensor connector. Refer
to “Intermittent trouble”.
Is this step completed?
—
—
19
Repair the circuit for open/short circuit, and
the connector for improper connection
between the EHCU connector and the speed
sensor connector.
Is this step completed?
—
20
Replace the EHCU.
Is this step completed?
—
—
21
1. Install all the components, and check that
those are installed properly.
2. Clear the DTC.
Is this step completed?
—
Go to “Diagnostic
basic flow”.
Step
Action
Value
YES
NO
ABS/ASR 5A4-59
DTC:C0263 (Flash Code 63) Speed Sensor Signal Fault/Wrong Tire Size; RL
Check flow B-19
Step
Action
Value
YES
NO
1
Check the tire.
Is the tire specification correct? Is abnormal
wear found in the outer surface?
—
Replace with the
specified tire with-
out wear.Go to
2
Has certain tire been rotated alone by perfum-
ing for jack-up or roller tester?
—
DTC may be set if
certain tire is
rotated alone. Go
3
Is the FL wheel bearing rattling?
—
4
Is the FL wheel speed sensor/sensor rotor rat-
tling?
—
5
Is iron powder attached to the FL wheel speed
sensor/sensor rotor?
—
6
Check the RL wheel speed sensor. (Refer to
the check flow C-1-3.)
Is the RL sensor output normal?
—
7
Does the sensor rotor have missing tooth or
saw-toothed?
—
8
1. Clear the DTC.
2. Test run the vehicle, and perform the self-
diagnosis.
Is DTC displayed repeatedly?
—
9
Is the speed sensor damaged or saw-
toothed?
—
10
Adjust the preload of the wheel bearing.
Is this step completed?
—
—
11
Repair or replace the speed sensor/sensor
rotor.
Is this step completed?
—
—
12
Repair the speed sensor/sensor rotor.
Is this step completed?
—
—
13
Replace the sensor rotor.
Is this step completed?
—
—
14
Replace the RL wheel speed sensor.
Is this step completed?
—
—
15
Check the RL wheel speed sensor circuit.
(Refer to the check flow B-15.)
Is this step completed?
—
Check the repair.
—
16
Check the circuit for open circuit, and the con-
nector for improper connection the EHCU
connector and the speed sensor connector.
Refer to “Intermittent trouble”.
Is this step completed?
—
—
5A4-60 ABS/ASR
17
Replace the EHCU.
Is this step completed?
—
—
18
1. Install all the components, and check that
those are installed properly.
2. Clear the DTC.
Is this step completed?
—
Go to “Diagnostic
basic flow”.
Step
Action
Value
YES
NO
ABS/ASR 5A4-61
DTC:C0264 (Flash Code 64) Speed Sensor Signal Fault/Wrong Tire Size; RR
Check flow B-20
Step
Action
Value
YES
NO
1
Check the tire.
Is the tire specification correct? Is abnormal
wear found in the outer surface?
—
Replace with the
specified tire with-
out wear.Go to
2
Has certain tire been rotated alone by perfum-
ing for jack-up or roller tester?
DTC may be set if
certain tire is
rotated alone. Go
3
Is the RR wheel bearing rattling?
—
4
Is the RR wheel speed sensor/sensor rotor
rattling?
—
5
Is iron powder attached to the RR wheel
speed sensor/sensor rotor?
—
6
Check the RR wheel speed sensor. (Refer to
the check flow C-1-4.)
Is the RR sensor output normal?
—
7
Does the sensor rotor have missing tooth or
saw-toothed?
—
8
1. Clear the DTC.
2. Test run the vehicle, and perform the self-
diagnosis.
Is DTC displayed repeatedly?
—
9
Is the speed sensor damaged or saw-
toothed?
—
10
Adjust the preload of the wheel bearing.
Is this step completed?
—
—
11
Repair or replace the speed sensor/sensor
rotor.
Is this step completed?
—
—
12
Repair the speed sensor/sensor rotor.
Is this step completed?
—
—
13
Replace the sensor rotor.
Is this step completed?
—
—
14
Replace the RR wheel speed sensor.
Is this step completed?
—
—
15
Check the RR wheel speed sensor circuit.
(Refer to the check flow B-16.)
Is this step completed?
—
Check the repair.
—
16
Check the circuit for open circuit, and the con-
nector for improper connection the EHCU
connector and the speed sensor connector.
Refer to “Intermittent trouble”.
Is this step completed?
—
—
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