Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Service manual — part 1180

BRAKE CONTROL SYSTEM

5A–49

Chart B-20 FL Speed Sensor Missing Signal (DTC 61 (Flash out) / C0226, C0227 (Serial
communications))

NOTE: Even after repairing the faulty part the warning
light (W/L) does not go out if the vehicle is at a stop.
Turn the ignition switch to the ON position and drive the
vehicle at 12 km/h (8 mph) or higher to make sure that
the warning light goes out.

Step

Action

Yes

No

1

1. Turn the key off.

2. Disconnect coil integrated module connector.

3. Measure the FL speed sensor resistance between coil

integrated module connector (C-4) terminals 2 and 10.

Is the resistance between 2.0k and 2.8k ohms? (2WD model)
Is the resistance between 0.7k and 1.5k ohms? (4WD model)

Go to Step 2

Go to Step 3

2

Is there play sensor/sensor rotor?

Repair.

Go to Step 6

Go to Step 4

3

Measure the FL speed sensor resistance at the sensor
connector.
Is the resistance between 2.0k and 2.8k ohms? (2WD model)
Is the resistance between 0.7k and 1.5k ohms? (4WD model)

Repair harness

abnormality

between

sensors and

coil integrated

module.

Go to Step 6

Replace

sensor.

Go to Step 6

4

Damage and powdered iron sticking to sensor/sensor ring?

Repair.

Go to Step 6

Go to Step 5

5

Is sensor output normal? (Chart C-1-1 or TC-1)

Check for faults

in harness

between speed
sensor and coil

integrated

module.

Fault found:

repair, and

perform system

self-check.

No fault found:

replace EHCU.

Go to Step 6

Replace

sensor.

Go to Step 6

6

1. Reconnect all components, ensure all components are

properly mounted.

2. Clear diagnostic trouble code.

Was this step finished?

Repeat the “Basic

diagnostic flow

chart”

Go to Step 6

5A–50

BRAKE CONTROL SYSTEM

Chart B-21 FR Speed Sensor Missing Signal (DTC 62 (Flash out) / C0222, C0223 (Serial
communications))

NOTE: Even after repairing the faulty part the warning
light (W/L) does not go out if the vehicle is at a stop.
Turn the ignition switch to the ON position and drive the
vehicle at 12 km/h (8 mph) or higher to make sure that
the warning light goes out.

Step

Action

Yes

No

1

1. Turn the key off.

2. Disconnect coil integrated module connector.

3. Measure the FR speed sensor resistance between coil

integrated module connector (C-4) terminals 3 and 11.

Is the resistance between 2.0k and 2.8k ohms? (2WD model)
Is the resistance between 0.7k and 1.5k ohms? (4WD model)

Go to Step 2

Go to Step 3

2

Is there play sensor/sensor rotor?

Repair.

Go to Step 6

Go to Step 4

3

Measure the FR speed sensor resistance at the sensor
connector.
Is the resistance between 2.0k and 2.8k ohms? (2WD model)
Is the resistance between 0.7k and 1.5k ohms? (4WD model)

Repair harness

abnormality

between

sensors and

coil integrated

module.

Go to Step 6

Replace

sensor.

Go to Step 6

4

Damage and powered iron sticking to sensor/sensor ring?

Repair.

Go to Step 6

Go to Step 5

5

Is sensor output normal? (Chart C-1-2 or TC-1)

Check for faults

in harness

between speed
sensor and coil

integrated

module.

Fault found:

repair, and

perform system

self-check.

No fault found:

replace EHCU.

Go to Step 6

Replace

sensor.

Go to Step 6

6

1. Reconnect all components, ensure all components are

properly mounted.

2. Clear diagnostic trouble code.

Was this step finished?

Repeat the “Basic

diagnostic flow

chart”

Go to Step 6

BRAKE CONTROL SYSTEM

5A–51

Chart B-22 Rear Speed Sensor Missing Signal (DTC 63 (Flash out) / C0236, C0237 (Serial
communications))

NOTE: Even after repairing the faulty part the warning
light (W/L) does not go out if the vehicle is at a stop.
Turn the ignition switch to the ON position and drive the
vehicle at 12 km/h (8 mph) or higher to make sure that
the warning light goes out.

Step

Action

Yes

No

1

1. Turn the key off.

2. Disconnect coil integrated module connector.

3. Measure the Rear speed sensor resistance between coil

integrated module connector (C-4) terminals 4 and 12.

Is the resistance between 1.0k and 1.7k ohms?

Go to Step 2

Go to Step 3

2

Is there play sensor/sensor rotor?

Repair.

Go to Step 6

Go to Step 4

3

Measure the rear speed sensor resistance at the sensor
connector.
Is the resistance between 1.0k and 1.7k ohms?

Repair harness

abnormality

between

sensors and

coil integrated

module.

Go to Step 6

Replace

sensor.

Go to Step 6

4

Damage and powered iron sticking to sensor/sensor ring?

Repair.

Go to Step 6

Go to Step 5

5

Is sensor output normal? (Chart C-1-3 or TC-1)

Check for faults

in harness

between speed
sensor and coil

integrated

module.

Fault found:

repair, and

perform system

self-check.

No fault found:

replace EHCU.

Go to Step 6

Replace

sensor.

Go to Step 6

6

1. Reconnect all components, ensure all components are

properly mounted.

2. Clear diagnostic trouble code.

Was this step finished?

Repeat the “Basic

diagnostic flow

chart”

Go to Step 6

5A–52

BRAKE CONTROL SYSTEM

Chart B-23 Simultaneous Drop-out of Front Speed Sensor Signal (DTC 64 (Flash out) /
C0229 (Serial communications))

NOTE: Even after repairing the faulty part the warning
light (W/L) does not go out if the vehicle is at a stop.
Turn the ignition switch to the ON position and drive the
vehicle at 12 km/h (8 mph) or higher to make sure that
the warning light goes out.

Step

Action

Yes

No

1

1. Turn the key off.

2. Disconnect coil integrated module connector.

3. Measure the FL speed sensor resistance between coil

integrated module connector (C-4) terminals 2 and 10.

Is the resistance between 2.0k and 2.8k ohms? (2WD model)
Is the resistance between 0.7k and 1.5k ohms? (4WD model)

Go to Step 2

Go to Step 3

2

Measure the FR speed sensor resistance between coil integrated
module connector (C-4) terminals 3 and 11.
Is the resistance between 2.0k and 2.8k ohms? (2WD model)
Is the resistance between 0.7k and 1.5k ohms? (4WD model)

Go to Step 5

Go to Step 4

3

Measure the FL speed sensor resistance at the sensor
connector.
Is the resistance between 2.0k and 2.8k ohms? (2WD model)
Is the resistance between 0.7k and 1.5k ohms? (4WD model)

Repair harness

abnormality

between

sensors and

coil integrated

module.

Go to Step 2

Replace

sensor.

Go to Step 2

4

Measure the FR speed sensor resistance at the sensor
connector.
Is the resistance between 2.0k and 2.8k ohms? (2WD model)
Is the resistance between 0.7k and 1.5k ohms? (4WD model)

Repair harness

abnormality

between

sensors and

coil integrated

module.

Go to Step 5

Replace

sensor.

Go to Step 5

5

Damage and powered iron sticking to sensor/sensor ring?

Repair.

Go to Step 6

Go to Step 6

6

Is there play sensor/sensor rotor?

Repair.

Go to Step 7

Go to Step 7

7

Is sensor output normal? (Chart C-1-1&C-1-2 or TC-1)

Check for faults

in harness

between speed
sensor and coil

integrated

module.

Fault found:

repair, and

perform system

self-check.

No fault found:

replace EHCU.

Go to Step 8

Replace

sensor.

Go to Step 8

8

1. Reconnect all components, ensure all components are

properly mounted.

2. Clear diagnostic trouble code.

Was this step finished?

Repeat “Basic

diagnostic flow

chart”

Go to Step 8