Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Service manual — part 1179

BRAKE CONTROL SYSTEM

5A–45

Chart B-13 FR Isolation Solenoid Coil Failure (DTC 43 (Flash out) / C0241, C0243 (Serial
communications))

Chart B-14 FR Dump Solenoid Coil Failure (DTC 44(Flash out) / C0242, C0244 (Serial
communications))

Chart B-15 Rear Isolation Solenoid Coil Failure (DTC 45 (Flash out) / C0251, C0253 (Serial
communications))

Step

Action

Yes

No

1 Was

the

“EHCU Connector Pin–out Checks” performed?

Go to Step 2

Go to “EHCU

Connector Pin–out

Checks.”

2

1. Turn the key switch to off.

2. Disconnect the 2–way EHCU connector (C–5) from the

EHCU.

3. Inspect the connector for damage or corrosion.

Is the connector free from damage or corrosion?

Go to Step 3

Repair the

connector. Repeat

the “Basic

Diagnostic Flow

Chart.”

3

1. Replace the Coil Integrated Module.

2. Reconnect all components, ensure all components are

properly mounted.

Was this step finished?

Repeat the “Basic

diagnostic flow

chart”

Go to Step 3

Step

Action

Yes

No

1 Was

the

“EHCU Connector Pin–out Checks” performed?

Go to Step 2

Go to “EHCU

Connector Pin–out

Checks.”

2

1. Turn the key switch to off.

2. Disconnect the 2–way EHCU connector (C–5) from the

EHCU.

3. Inspect the connector for damage or corrosion.

Is the connector free from damage or corrosion?

Go to Step 3

Repair the

connector. Repeat

the “Basic

Diagnostic Flow

Chart.”

3

1. Replace the Coil Integrated Module.

2. Reconnect all components, ensure all components are

properly mounted.

Was this step finished?

Repeat the “Basic

diagnostic flow

chart”

Go to Step 3

Step

Action

Yes

No

1 Was

the

“EHCU Connector Pin–out Checks” performed?

Go to Step 2

Go to “EHCU

Connector Pin–out

Checks.”

2

1. Turn the key switch to off.

2. Disconnect the 2–way EHCU connector (C–5) from the

EHCU.

3. Inspect the connector for damage or corrosion.

Is the connector free from damage or corrosion?

Go to Step 3

Repair the

connector. Repeat

the “Basic

Diagnostic Flow

Chart.”

3

1. Replace the Coil Integrated Module.

2. Reconnect all components, ensure all components are

properly mounted.

Was this step finished?

Repeat the “Basic

diagnostic flow

chart”

Go to Step 3

5A–46

BRAKE CONTROL SYSTEM

Chart B-16 Rear Dump Solenoid Coil Failure (DTC 46 (Flash out) / C0252, C0254 (Serial
communications))

Chart B-17 FL Speed Sensor Open or Shorted (DTC 51 (Flash out) / C0225 (Serial
communications))

Step

Action

Yes

No

1 Was

the

“EHCU Connector Pin–out Checks” performed?

Go to Step 2

Go to “EHCU

Connector Pin–out

Checks.”

2

1. Turn the key switch to off.

2. Disconnect the 2–way EHCU connector (C–5) from the

EHCU.

3. Inspect the connector for damage or corrosion.

Is the connector free from damage or corrosion?

Go to Step 3

Repair the

connector. Repeat

the “Basic

Diagnostic Flow

Chart.”

3

1. Replace the Coil Integrated Module.

2. Reconnect all components, ensure all components are

properly mounted.

Was this step finished?

Repeat the “Basic

diagnostic flow

chart”

Go to Step 3

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 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)

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 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 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

BRAKE CONTROL SYSTEM

5A–47

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

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?(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 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 1.0k and 1.7k 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 1.0k and 1.7k 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