2004 ISUZU TF SERIES immobilizer

ENGINE DRIVEABILITY AND EMISSIONS 6E–257
14 Monitor “B1S1 (Bank 1 Sensor 1) Status” on the Tech
2.
Is the “B1S1 (Bank 1 Sensor 1) Status” in the rich
condition?—Verify repair Go to Step 15
15 Check items that can cause the engine to run rich.
Refer to DTC P1167 “Fuel Supply System Rich During
Deceleration Fuel Cut Off”.
Was a problem found?—Verify repair Go to Step 16
16 1. Remove the spark plugs and check for gas or oil
fouling cracks, wear, improper gap, burned
electrodes, heavy deposits, or improper heat
range.
2. If spark plugs are fouled, the cause of fouling must
be determined before replacing the spark plugs.
Was a problem found?—Verify repair Go to Step 17
17 Check for proper calibration of the speedometer.
Does the speed indicated on the speed meter closely
match the vehicle speed displayed on the Tech 2?—Go to Step 19Go to Step 18
18 Diagnose and repair the inaccurate speedometer
condition as necessary. Refer to Vehicle Speed
Sensor in Electrical Diagnosis.—Verify Repair—
19 Check for proper calibration of the fuel gauge.
Was a problem found?—Verify repair Go to Step 20
20 Check for the following engine mechanical problems
(refer to Engine Mechanical):
Low compression
Worn camshaft
Sticking or leaking valves
Valve timing
Was a problem found?—Verify repair Go to Step 21
21 1. Review all diagnostic procedures within this table.
2. If all procedures have been completed and no
malfunctions have been found, review/inspect the
followi ng:
Visual/physical inspection
Te c h 2 d a t a
All electrical connections within a suspected
circuit and/or system
Was a problem found?—Verify repair Go to Step 22
22 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 23
23 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.—Verify Repair— Step Action Value(s) Yes No

6E–260 ENGINE DRIVEABILITY AND EMISSIONS
24 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 25
25 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.—Verify Repair— Step Action Value(s) Yes No

ENGINE DRIVEABILITY AND EMISSIONS 6E–261
DIESELING, RUN-ON SYMPTOM
DEFINITIONS: Engine continues to run after key is turned OFF, but runs very rough. If engine runs smoothly, check
the ignition switch and adjustment.
Step Action Value(s) Yes No
1Was the “On-Board Diagnostic (OBD) System Check”
performed?—Go to Step 2Go to OBD
System Check
2 1. Perform a bulletin search.
2. If a bulletin that addresses the symptom is found,
correct the condition as instructed in the bulletin.
Was a bulletin found that addresses the symptom?—Verify repair Go to Step 3
3 Was a visual/physical check performed?
—Go to Step 4Go to Visual /
physical Check.
4 Check for a short between battery voltage and the
ignition feed circuit.
Was a problem found?—Verify repair Go to Step 5
5 Check the fuel leaking from injector. Refer to Fuel
System Diagnostic.
Was the problem found?—Verify repair Go to Step 6
6 1. Review all diagnostic procedures within this table.
2. If all procedures have been completed and no
malfunctions have been found, review/inspect the
followi ng:
Visual/physical inspection
Te c h 2 d a t a
All electrical connections within a suspected
circuit and/or system
Was a 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
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 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—

ENGINE DRIVEABILITY AND EMISSIONS 6E–263
10 Check for the following engine mechanical problems
(refer to Engine Mechanical):
Low compression
Leaking cylinder head gaskets
Worn camshaft
Sticking or leaking valves
Valve timing
Broken valve springs
Camshaft drive belt slipped or stripped
Was a problem found?—Verify repair Go to Step 11
11 Check leakage at exhaust system.
Check the intake and ex haust manifold for casting
flash. Refer to Engine Mechanical.
Was a problem found?—Verify repair Go to Step 12
12 1. Review all diagnostic procedures within this table.
2. If all procedures have been completed and no
malfunctions have been found, review/inspect the
followi ng:
Visual/physical inspection
Te c h 2 d a t a
All electrical connections within a suspected
circuit and/or system
Was a problem found?—Verify repair Go to Step 13
13 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 14
14 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 Action Value(s) Yes No

IMMOBILIZER SYSTEM 11A-1

SECTION 11A
IMMOBILIZER SYSTEM
CONTENTS

Service Precaution.................................................
11A-2
General Description...............................................
11A-3
What happens without proper transponder
operation? ..........................................................
11A-6
No proper transponder is available, what
should be done for the system? ......................
11A-6
Caution to the operation.....................................
11A-6
Summary of operation........................................
11A-6
What your organization should provide for
your customer ....................................................
11A-6
Car Pass .............................................................
11A-6
Security code management ..............................
11A-6
Essential tool (Scan tool : Tech-2) ..................
11A-6
Circuit Diagram .................................................
11A-7
Parts Location.........................................................
11A-10
Immobilizer control unit (ICU); For Electronic
Control Engine (6VE1, C24SE, 4JH1-TC,
4JA1-TC) .......................................................... 11A-11
Pin-outs; For Electronic Control Engine
(6VE1, C24SE, 4JH1-TC, 4JA1-TC)...............
11A-12
Immobilizer control unit (ICU); Mechanical
Control Engine (4JA1-T) .................................. 11A-13
Immobilizer coil (Antenna) ...................................
11A-15
Transponder (Key) ............................................ 11A-15
Immobilizer warning lamp ................................. 11A-15
Engine control module (ECM) .......................... 11A-15
Car Pass Card .................................................. 11A-16
Loss of car pass card.........................................
11A-16
Instructions on Filling Out the form "Data
request, car pass" .............................................
11A-16
Important Instructions ........................................
11A-17
lmportant information on Programming .............
11A-19
Security code ......................................................
11A-19
Entering a code ..................................................
11A-19
Transponder (Key) .............................................
11A-19
Important .............................................................
11A-19
Tech-2 Scan Tool ..................................................
11A-20
Tech-2 Features .................................................
11A-21
Getting Started ...................................................
11A-21
Operating Procedure .........................................
11A-22
Menu ....................................................................
11A-23
DTC ......................................................................
11A-23
Clear DTC Information .......................................
11A-23
Tech-2 Data Display ...........................................
11A-23
Check Vehicle Identification Number (VIN) ....
11A-23
Reset Immobilizer (Reset Immobilizer
Control Unit) .......................................................
11A-23
Reset Engine Control Module (Reset ECM) ...
11A-24
Erase transponder key .......................................
11A-24
Programming Immobilizer Function .................
11A-25
Programming ICU ...............................................
11A-26
Programming ECM .............................................
11A-27
Programming ICU and ECM .............................
11A-28
Transponder program ........................................
11A-28
Data List ...............................................................
11A-30
Diagnostic procedure ............................................
11A-31
Clearing Diagnostic Trouble Codes ....................
11A-31
Verifying Vehicle Repair ........................................
11A-31
Diagnostic Aids ......................................................
11A-31
Check the condition for system parts ..............
11A-31
Check the Electro-Magnetic Interference
(EMI) ....................................................................
11A-31
Check the other items ........................................
11A-31
Check the operation ...........................................
11A-31
Diagnostic Trouble Code (DTC) list ....................
11A-32
IMMOBILIZER SYSTEM CHECK ........................
11A-33
NO IMMOBILIZER WARNING LAMP .................
11A-36
IMMOBILIZER WARNING LAMP ON STEADY 11A-37
B0001 REPLACE ELECTRONIC CONTROL
UNIT (ECU) (IMMOBILIZER FAULT) ................
11A-38
B0002 IMMOBILIZER NOT PROGRAMMED ....
11A-39
B0003 TRANSPONDER KEY PROBLEM ..........
11A-40
B0004 IMMOBILIZER COIL CIRCUIT
(ANTENNA COIL FAULT) ...................................
11A-42
B0005 COMMUNICATION LINE W VOLTAGE
LOW .......................................................................
11A-43
B0006 COMMUNICATION LINE W VOLTAGE
HIGH .......................................................................
11A-44
B0007 NO ENGINE REQUEST RECEIVED ......
11A-45
B0008 WRONG TRANSPONDER KEY .............
11A-47
B0009 NO TRANSPONDER KEY
PROGRAMMED ...................................................
11A-48

11A-2 IMMOBILIZER SYSTEM

B0010 UNKNOWN TRANSPONDER KEY .......
11A-49
B0011 TRANSPONDER KEY PROBLEM
(Only 4JA1-T Engine) ...................................... 11A-50
B0012 WRONG TRANSPONDER KEY
(Only 4JA1-T Engine) ...................................... 11A-52
B0013 IMMOBILIZER NOT PROGRAMMED
(Only 4JA1-T Engine) ...................................... 11A-53
B0014 NO TRANSPONDER KEY
PROGRAMMED (Only 4JA1-T Engine) ........... 11A-54
B0015 VEHICLE SPEED SIGNAL LOW
(Only 4JA1-T Engine) ....................................... 11A-55
B0016 VEHICLE SPEED SIGNAL HIGH
(Only 4JA1-T Engine) ...................................... 11A-56
B0023 IMMOBILIZER COIL CIRCUIT
(ANTENNA COIL FAULT)
(Only 4JA1-T Engine) ...................................... 11A-57
B0024 WRONG TRANSPONDER KEY
(Only 4JA1-T Engne) ....................................... 11A-58
B0055 EEPROM ERROR ................................. 11A-59
Special Tool ............................................................
11A-60

Service Precaution
WARNING: THIS VEHICLE HAS A SUPPLEMENTAL
RESTRAINT SYSTEM (SRS). REFER TO THE SRS
COMPONENT AND WIRING LOCATION VIEW IN
ORDER TO DETERMINE WHETHER YOU ARE
PERFORMING SERVICE ON OR NEAR THE SRS
COMPONENTS OR THE SRS WIRING. WHEN YOU
ARE PERFORMING SERVICE ON OR NEAR THE
SRS COMPONENTS OR THE SRS WIRING, REFE
R
TO THE SRS SERVICE INFORMATION. FAILURE TO
FOLLOW WARNINGS COULD RESULT IN
POSSIBLE AIR BAG DEPLOYMENT, PERSONAL
INJURY, OR OTHERWISE UNNEEDED SRS SYSTEM
REPAIRS.



CAUTION: Always use the correct fastener in the
proper location. When you replace a fastener, use
ONLY the exact part number for that application.
ISUZU will call out those fasteners that require a
replacement after removal. ISUZU will also call out
the fasteners that require thread lockers or thread
sealant. UNLESS OTHERWISE SPECIFIED, do not
use supplemental coatings (Paints, greases, o
r
other corrosion inhibitors) on threaded fasteners o
r
fastener joint interfaces. Generally, such coatings
adversely affect the fastener torque and the joint
clamping force, and may damage the fastener.
When you install fasteners, use the correct
tightening sequence and specifications. Following
these instructions can help you avoid damage to
parts and systems.

IMMOBILIZER SYSTEM 11A-3

General Description
The immobilizer system consists of the four major
components which are Engine Control Module (ECM),
Immobilizer Control Unit (lCU), transponder, and scan
tool (Tech-2).
This system can be activated by a correctly programmed
transponder and starter switch is set to OFF.
This system can be deactivated by a correctl
y
programmed transponder key connected with a correctly
programmed ECM and a correctly programmed lCU.
While the system is on :
The starter cut off relay deactivates function of starter,
and the fuel injector power source is deactivated also.


Check Engine lamp is flashing.


Warning buzzer is operating.
(With antitheft system)






Gasoline Engine (6VE1, C24SE)

LTW3BALF000101

11A-4 IMMOBILIZER SYSTEM

Diesel Engine With ECM (4JH1-TC/4JA1-TC)

LTW3BALF000201