Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual — part 54

4JA1-TC/4JH1-TC ENGINE DRIVEABILITY AND EMISSIONS

6E–211

5

Using the DVM and check the ignition power feed
circuit.
Breaker box is available:

1. Ignition “Off”, engine “Off”.

2. Install the breaker box as type A. (ECM

disconnected)

3. Check the circuit for open or short to ground

circuit.

Was the problem found?

Breaker box is not available:

1. Ignition “Off”, engine “Off”.

2. Disconnect the ECM connector.

3. Check the circuit for open or short to ground

circuit.

Was the problem found?

—

Repair faulty
harness and

verify repair

Go to Step 6

6

Check the ignition switch.
If a poor/faulty connection is found, repair as
necessary.
Was the problem found?

—

Verify repair

Go to Step 7

7

Is the ECM programmed with the latest software
release?
If not, download the latest software to the ECM using
the “SPS (Service Programming System)”.
Was the problem solved?

—

Verify repair

Go to Step 8

Step

Action

Value(s)

Yes

No

39

6

C-41

39

6

C-56

C-41

6E–212

4JA1-TC/4JH1-TC ENGINE DRIVEABILITY AND EMISSIONS

8

Replace the ECM.
Is the action complete?
IMPORTANT: The replacement ECM must be
programmed. Refer to section of the Service
Programming System (SPS) in this manual.
Following ECM programming, the immobiliser system
(if equipped) must be linked to the ECM. Refer to
section 11 “Immobiliser System-ECM replacement” for
the ECM/Immobiliser linking procedure.

—

Verify repair

—

Step

Action

Value(s)

Yes

No

4JA1-TC/4JH1-TC ENGINE DRIVEABILITY AND EMISSIONS

6E–213

DIAGNOSTIC TROUBLE CODE (DTC) P0602 ECU PROGRAMMING ERROR

Condition for setting the DTC and action taken when the DTC sets

Circuit Description & Diagnostic Aids

The replacement ECM must be programmed by Service
Programming System (SPS). Because, the service

ECM does not programmed.
When the service ECM is used without SPS, DTC
P0602 will appear.

Diagnostic Trouble Code (DTC) P0602 ECU Programming Error

Flash

Code

Code

Symptom

Code

MIL

DTC Name

DTC Setting Condition

Fail-Safe (Back Up)

-

P0602

-

-

Programming Error

ECM memory area error.

Engine control disabled.

Step

Action

Value(s)

Yes

No

1

Was the “On-Board Diagnostic (OBD) System Check”
performed?

—

Go to Step 2

Go to On Board

Diagnostic

(OBD) System

Check

2

1. Connect the Tech 2.

2. Review and record the failure information.

3. Select “F0: Read DTC Infor As Stored By ECU” in

“F0: Diagnostic Trouble Codes”.

Is the DTC P0602 stored as “Present Failure”?

—

Go to Step 3

Refer to

Diagnostic Aids

3

Download the latest software to the ECM using the
“SPS (Service Programming System)”.
Is the action complete?

—

Verify repair

—

6E–214

4JA1-TC/4JH1-TC ENGINE DRIVEABILITY AND EMISSIONS

DIAGNOSTIC TROUBLE CODE (DTC) P0606 (SYMPTOM CODE A)

(FLASH CODE 28) ECU MALFUNCTION

DIAGNOSTIC TROUBLE CODE (DTC) P0606 (SYMPTOM CODE B)

(FLASH CODE 28) ECU MALFUNCTION

Condition for setting the DTC and action taken when the DTC sets

Circuit Description & Diagnostic Aids

If the ECM inside (IC, circuit, memory, etc,) failed, DTC
P0606 (Symptom Code A) or P0606 (Symptom Code B)
will be stored.

Diagnostic Trouble Code (DTC) P0606 (Symptom Code A) (Flash Code 28) ECU

Malfunction

Flash

Code

Code

Symptom

Code

MIL

DTC Name

DTC Setting Condition

Fail-Safe (Back Up)

28

P0606

A

ON

ECM Malfunction (1)

Gate Array communication
error.

1. MAB (fuel cutoff solenoid

valve cutoff) is operated.

2. Desired injection quantity

becomes 0mg/strk.

B

ON

ECM Malfunction (2)

1. Throttle position is below

1%.

2. Desired injection quantity is

more than 0mg/strk.

3. Engine speed is more than

2000rpm.

MAB (fuel cutoff solenoid valve
cutoff) is operated.

Step

Action

Value(s)

Yes

No

1

Was the “On-Board Diagnostic (OBD) System Check”
performed?

—

Go to Step 2

Go to On Board

Diagnostic

(OBD) System

Check

2

1. Connect the Tech 2.

2. Review and record the failure information.

3. Select “F0: Read DTC Infor As Stored By ECU” in

“F0: Diagnostic Trouble Codes”.

Is the DTC P0606 (Symptom Code A) stored as
“Present Failure”?

—

Go to Step 3

Refer to

Diagnostic Aids

and Go to Step

3

3

1. Using the Tech 2, ignition “On” and engine “Off”.

2. Select “F1: Clear DTC Information” in “F0:

Diagnostic Trouble Codes” with the Tech 2 and
clear the DTC information.

3. Operate the vehicle and monitor the “F0: Read

DTC Infor As Stored By ECU” in the “F0:
Diagnostic Trouble Codes”.

Was the DTC P0606 (Symptom Code A) stored in this
ignition cycle?

—

Go to Step 4

Refer to

Diagnostic Aids

4

Is the ECM programmed with the latest software
release?
If not, download the latest software to the ECM using
the “SPS (Service Programming System)”.
Was the problem solved?

—

Verify repair

Go to Step 5