Isuzu N-Series. Manual - part 267

5A4-42 ABS/ASR

DTC:C0216 (Flash Code 16) CAN Communication Fault

Check flow B-5

Step

Action

Value

YES

NO

1

1. Turn the starter switch OFF.
2. Remove the harnesses from all the con-

trol units (engine, ABS, Smoother, etc.)
connected to the CAN communication
circuit.

3. Check for short circuit (shorts with

ground, power supply, lines, and circuits)
in the CAN communication circuit har-
nesses.

Is the harness normal?

—

Go to Step3

Go to Step2

2

Repair the CAN communication circuit.

Is the procedure completed?

—

Go to Step3

—

3

1. Turn the starter switch OFF.
2. Remove the harness from the EHCU.
3. Measure the circuit resistance between

the terminals 14 and 15, and between ter-
minals 26 and 27 in EHCU harness-side
connector.

Is the resistance within specified value?

100 —140

Ω

Go to Step5

Go to Step4

4

Inspect the CAN communication circuit, termi-
nating resistor, and connectors for faulty con-
tact, the pin terminals for looseness, etc., and
repair as necessary.

Is the procedure completed?

—

Go to Step5

—

5

1. Turn the starter switch OFF.
2. Check the CAN communication (engine,

ABS, Smoother, etc.) circuit harnesses
for open circuit.

Is the harness normal?

—

Go to Step7

Go to Step6

6

Repair the CAN communication circuit.

Is the procedure completed?

—

Go to Step7

—

7

1. Turn the starter switch OFF.
2. Install the harnesses to all the control

units connected to the CAN communica-
tion circuit.

3. Turn the starter switch ON.
4. Check each system (engine, Smoother,

etc) for DTC.

5. If any DTC is detected in any system, re-

pair it.

Is the procedure completed?

—

Go to Step8

—

8

1. Clear the DTC.
2. Perform the test drive.
3. Check for DTC.

Was DTC C0216 detected?

—

Go to Step9

Go to Step10

ABS/ASR 5A4-43

9

Replace the EHCU.

Is this step completed?

—

Go to Step10

—

10

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”.

Go to Step10

Step

Action

Value

YES

NO

5A4-44 ABS/ASR

DTC:C0226 (Flash Code 26) ECM Communication Fault

Check flow B-6

Step

Action

Value

YES

NO

1

Inspect the engine control, and repair or
replace any faulty parts.

Is this step completed?

—

Go to Step2

Go to Step1

2

Perform the check flow B-5.

Is this step completed?

—

Go to Step3

Go to Step2

3

1. Clear the DTC.
2. Perform the test drive.
3. Check for DTC.

Was DTC C0226 detected?

—

Go to Step4

Go to Step5

4

Replace the EHCU.

Is this step completed?

—

Go to Step5

—

5

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”.

Go to Step5

ABS/ASR 5A4-45

DTC:C0233 (Flash Code 33) Motor Drive Circuit Fault

Check flow B-7

Step

Action

Value

YES

NO

1

1. Turn the starter switch OFF.
2. Disconnect the connector of the EHCU.
3. Turn the starter switch ON.
4. Measure the voltage between the J-177

connector terminal 24 and the J-177 con-
nector terminal 23.

Is the value within specified value?

20 — 32V

Go to Step5

Go to Step2

2

Repair the circuit between the J-177 connec-
tor terminal 24 and the FL-9, or replace the
FL-9.

Is this step completed?

—

Go to Step3

Go to Step2

3

Measure the voltage between the J-177 con-
nector terminals 24 and 23.

Is the value within specified value?

20 — 32V

Go to Step6

Go to Step4

4

Repair the harness between the J-177 con-
nector terminal 23 and the chassis ground.

Is this step completed?

—

Go to Step6

Go to Step4

5

Replace the EHCU.

Is this step completed?

—

Go to Step6

Go to Step5

6

1. Install all the components, and check that

those are installed properly.

2. Clear the DTC.
3. Test run the vehicle.

Is this step completed?

—

Go to “Diagnostic 

basic flow”.

Go to Step6