Isuzu Rodeo UE. Manual - part 106

5A–47

BRAKE CONTROL SYSTEM

Chart B-18 FR Speed Sensor Open or Shorted (DTC 52 (Flash out) / C0221 (Serial
communications))

Step

Action

Yes

No

1

1. Turn the key off.
2. Disconnect coil integrated module connector.
3. Measure the resistance between coil integrated module

connector (C-4) terminals 3 and 11.

Is the resistance between 2.0k and 2.8k ohms?

Check for faults

in harness

between speed
sensor and coil

integrated

module.

Fault found:

Repair, and

perform system

self-check.

No fault found:

Replace coil

integrated

module.

Go to Step 3

Go to Step 2

2

Measure the FR speed sensor resistance at the sensor
connector.

Is the resistance between 2.0k and 2.8k ohms?

Repair harness

abnormality

between sensors

and coil

integrated

module.

Go to Step 3

Replace sensor.

Go to Step 3

3

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 3

5A–48

BRAKE CONTROL SYSTEM

Chart B-19 Rear Speed Sensor Open or Shorted (DTC 53 (Flash out) / C0235 (Serial
communications))

Step

Action

Yes

No

1

1. Turn the key off.
2. Disconnect coil integrated module connector.
3. Measure the resistance between coil integrated module

connector (C-4) terminals 4 and 12.

Is the resistance between 1.2k and 2.0k ohms?

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 3

Go to Step 2

2

Measure the Rear speed sensor resistance at the sensor
connector.

Is the resistance between 1.2k and 2.0k ohms?

Repair harness

abnormality

between sensors

and coil

integrated

module.

Go to Step 3

Replace sensor.

Go to Step 3

3

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 3

5A–49

BRAKE CONTROL SYSTEM

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

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?

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?

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-1-1 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

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.

5A–50

BRAKE CONTROL SYSTEM

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

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?

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?

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

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.