Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual - part 239

ENGINE DRIVEABILITY AND EMISSIONS

6E–197

2

1. Connect the Tech 2. 

2. Review and record the failure information. 

3. Select  “F0: Read DTC Infor By Priority” in “F0:

Diagnostic Trouble Code”. 

Is the DTC P0563 stored as “Present Failure”?

—

Go to Step 3

Refer to 

Diagnostic Aids 

and Go to Step 

3

3

1. Using the Tech2, ignition “On” and engine “Off”. 

2. Select “Clear DTC Information” with the Tech2 and

clear the DTC information. 

3. Operate the vehicle and monitor the “F5: Failed

This Ignition” in “F2: DTC Information”.

Was the DTC P0563 stored in this ignition cycle?

—

Go to Step 4

Refer to 

Diagnostic Aids 

and Go to Step 

4

4

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

2. Monitor the “Ignition Voltage” in the data display. 

3. Load the electrical system by turning on the

headlights, etc.. 

Does the Tech 2 indicate correct ignition voltage?   

10 - 14V

Go to Step 5

Check the 

charging 

system and Go 

to Step 5

5

Is the battery jamp start cable incorrectly connecting?

—

Verify 

procedure

Go to Step 6

6

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 7

7

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

6E–198

ENGINE DRIVEABILITY AND EMISSIONS

DIAGNOSTIC TROUBLE CODE (DTC) P0601 ECM MEMORY CHECKSUM

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

Circuit Description

The engine control module (ECM) used in this vehicle
utilizes an electrically erasable programmable read-only
memory (EEPROM). The EEPROM contains program
information and the calibrations required for engine,
transmission, and powertrain diagnostics operation.
Unlike the PROM used in past applications, the
EEPROM is not replaceable. When the ECM is replaced
or a calibration update is required, the ECM must be

programmed using a Tech 2.

Diagnostic Aids

• Diagnostic Trouble Code P0601 indicates that the

contents of the EEPROM have changed since the
ECM was programmed. The only possible repair is
ECM reprogramming or replacement. Check service
bulletins to program the replacement ECM with the
correct software and calibration for the vehicle.

Diagnostic Trouble Code (DTC) P0601 ECM Memory Checksum

Code

Type

DTC Name

DTC Setting Condition

Fail-Safe (Back Up)

P0601

A

ECM Memory Checksum

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 By Priority” in “F0:

Diagnostic Trouble Code”. 

Is the DTC P0601 stored as “Present Failure”?

—

Go to Step 3

Refer to 

Diagnostic Aids 

and Go to Step 

3

3

1. Using the Tech2, ignition “On” and engine “Off”. 

2. Select “Clear DTC Information” with the Tech2 and

clear the DTC information. 

3. Operate the vehicle and monitor the “F5: Failed

This Ignition” in “F2: DTC Information”.

Was the DTC P0601 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

5

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

—

ENGINE DRIVEABILITY AND EMISSIONS

6E–199

DIAGNOSTIC TROUBLE CODE (DTC) P0602 PROGRAMMING ERROR

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

Circuit Description

The engine control module (ECM) used in this vehicle
utilizes an electrically erasable programmable read-only
memory (EEPROM). The EEPROM contains program
information and the calibrations required for engine,
transmission, and powertrain diagnostics operation.
Unlike the PROM used in past applications, the
EEPROM is not replaceable. When the ECM is replaced

or a calibration update is required, the ECM must be
programmed using a Tech 2.

Diagnostic Aids

• Diagnostic Trouble Code P0602 indicates when non

programmed ECM is used without service
programming system (SPS). The replacement ECM
must be programmed.

Diagnostic Trouble Code (DTC) P0602 Programming Error

Code

Type

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 By Priority” in “F0:

Diagnostic Trouble Code”. 

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–200

ENGINE DRIVEABILITY AND EMISSIONS

DTC P0650 MALFUNCTION INDICATOR LAMP (MIL) CONTOROL CIRCUIT 

MALFUNCTION

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

Circuit Description

The check engine lamp should always be illuminated
and steady with ignition “ON” and the engine stopped.
Ignition feed voltage is supplied directly to the check
engine lamp indicator. The Engine Control Module
(ECM) turns the check engine lamp “ON” by grounding
the check engine lamp driver circuit. The check engine
lamp should not remain “ON” with the engine running
and no DTC(s) set. A steady check engine lamp with the
engine running and no DTC(s) suggests a short to
ground in the check engine lamp driver circuit.

Diagnostic Aids

An intermittent may be caused by a poor connection,
rubbed-through wire insulation, or a wire broken inside
the insulation. Check for the following items:

• Poor connection or damaged harness - Inspect the

ECM harness and connectors for improper mating,
broken locks, improperly formed or damaged
terminals, poor terminal-to-wire connection, and
damaged harness.

Code

Type

DTC Name

DTC Setting Condition

Fail-Safe (Back Up)

P0650

A

Malfunction Indicator Lamp (MIL) Con-
trol Circuit Malfunction

Check engine lamp circuit open, short to 
ground or short to voltage circuit.

No fail-safe function.

Buttery
Voltage

0.5
RED/
YEL

Engine
Room-RH

µP

J2-32

7

0.5
BRN/
YEL

Engine
Control
Module
(ECM)

Check
Engine
Lamp

Imnobiliser

Control

Unit

METER
15A

Ignition
SW

0.5
BLU

J2-4

0.5
GRN

J2-30

Diag
SW

Class 2
Serial
Data

0.85 BLK

Diagnostic
Comectar

16 15 14 13 12 11 10 9

8 7 6 5 4 3 2 1

METER
10A