2004 ISUZU TF SERIES Workshop Manual

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Page 2777 of 4264

ISUZU TF SERIES 2004 Workshop Manual ENGINE DRIVEABILITY AND EMISSIONS 6E–201
20 Replace the VSS.
Was the problem solved?—Verify repair Go to Step 21
21 Is the ECM programmed with the latest software
release?
If not, download the l

Page 2778 of 4264

ISUZU TF SERIES 2004 Workshop Manual 6E–202 ENGINE DRIVEABILITY AND EMISSIONS
DIAGNOSTIC TROUBLE CODE (DTC) P0562 SYSTEM VOLTAGE LOW
Condition for setting the DTC and action taken when the DTC sets
Circuit Description
The engine contro

Page 2779 of 4264

ISUZU TF SERIES 2004 Workshop Manual ENGINE DRIVEABILITY AND EMISSIONS 6E–203
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”.

ENGINE DRIVEABILITY AND EMISSIONS 6E–203
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 P0562 stored as “Present Failure”?—Go to Step 3Refer 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 P0562 stored in this ignition cycle?—Go to Step 4Refer 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 enough ignition voltage? 10 - 14.5V Go to Step 6Go to Step 5
5 Using the DVM and check the battery voltage at the
battery terminal.
Does the tester indicate enough battery voltage?
10 - 14.5V Go to Step 6Check the
charging
system, charge
or replace the
battery
6 Check for poor/faulty connection at the ECM
connector. If a poor/faulty connection is found, repair
as necessary.
Was the problem found?
—Verify repair Go to Step 7
7 Check for poor/faulty connection of the ECM ground
at the inlet manifold. If a poor/faulty connection is
found, repair as necessary.
Was the problem found?
—Verify repair Go to Step 8
8 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 9
9 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 immobilizer system
(if equipped) must be linked to the ECM. Refer to
section 11 “Immobilizer System-ECM replacement” for
the ECM/Immobilizer linking procedure.—Veri fy repai r— Step A ction Value(s) Yes No
16
2
17
12 C-56(J2)E-60(J1)
E-72

Page 2780 of 4264

ISUZU TF SERIES 2004 Workshop Manual 6E–204 ENGINE DRIVEABILITY AND EMISSIONS
DIAGNOSTIC TROUBLE CODE (DTC) P0563 SYSTEM VOLTAGE HIGH
Condition for setting the DTC and action taken when the DTC sets
Circuit Description
The engine contr

Page 2781 of 4264

ISUZU TF SERIES 2004 Workshop Manual ENGINE DRIVEABILITY AND EMISSIONS 6E–205
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”.

Page 2782 of 4264

ISUZU TF SERIES 2004 Workshop Manual 6E–206 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 contr

6E–206 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 ECMmust 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 Me mo ry Che cksum ECM memo ry are a erro r. Engine co ntrol disabled.
Step A ction Value(s) Yes No
1 Was the “On-Board Diagnostic (OBD) System Check”
performed?
—Go to Step 2Go 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 3Refer 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 4Refer 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 immobilizer system
(if equipped) must be linked to the ECM. Refer to
section 11 “Immobilizer System-ECM replacement” for
the ECM/Immobilizer linking procedure.—Veri fy repai r—

Page 2783 of 4264

ISUZU TF SERIES 2004 Workshop Manual ENGINE DRIVEABILITY AND EMISSIONS 6E–207
DIAGNOSTIC TROUBLE CODE (DTC) P0602 ECU PROGRAMMING ERROR
Condition for setting the DTC and action taken when the DTC sets
Circuit Description
The engine con

Page 2784 of 4264

ISUZU TF SERIES 2004 Workshop Manual 6E–208 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

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