Isuzu KB P190. Manual — part 1488

11A-54 IMMOBILIZER SYSTEM (C24SE, 4JA1-T)

B0024 WRONG TRANSPONDER KEY (Only 4JA1-T Engine)

Step Action Value(s)

Yes

No

1

Was the "Immobilizer System Check" performed?



Go to Step 2

Go to Immobilizer

System Check

2

Check the key.

Is a key peculiar to a vehicle?



Go to Step 3

Refer to

Diagnostic Aids

3

Check the immobilizer programming functions.
• Transponder (Key).
Was a problem found?



Go to Step 4

Go to Step 5

4

Perform the immobilizer programming functions.
• Transponder (Key).
(Refer to "Important information on Programming")

Was the action complete?



Go to Step 5



5

Recheck the DTC.

1. Key position is “OFF” and keep the position for

more than 30 seconds.

2. Key position is “ON”.

3. Check the DTC on scan tool.

Is DTC B0024 stored?



Go to Step 6

Verify repair

6

Replace the transponder (Key).

IMPORTANT: The replacement transponder (key)
must be programmed the security data by scan tool.

Was the action complete?



Go to Step 7



7

Recheck the DTC.

1. Key position is “OFF” and keep the position for

more than 30 seconds.

2. Key position is “ON”.

3. Check the DTC on scan tool.

Is DTC B0024 stored?



Go to Step 8

Verify repair

8

Replace the immobilizer control unit (ICU).

IMPORTANT: The replacement ICU must be
programmed the security data by scan tool.

Was the action complete?



Verify repair



IMMOBILIZER SYSTEM (C24SE, 4JA1-T) 11A-55

B0055 EEPROM ERROR

Step Action Value(s)

Yes

No

1

Was the "Immobilizer System Check" performed?



Go to Step 2

Go to Immobilizer

System Check

2

Recheck the DTC.

1. Key position is “OFF”.

2. Install the scan tool on vehicle.

3. Key position is “ON”.

4. Check the DTC on scan tool.

Is DTC B0055 stored?



Go to Step 3

Refer to

Diagnostic Aids

3

Check the immobilizer control unit (ICU) circuit.

1. Ignition "OFF," disconnect the ICU.

2. Check the ICU circuit for an open, short to ground,

or short to voltage.

Also, check the ICU ignition feed circuit for an open or
short to ground and the ICU ground circuit for an
open.

Was a problem found?



Go to Step 4

Go to Step 5

4

Repair or replace the immobilizer unit (ICU) circuit.

Was the action complete?



Verify repair



5

Replace the immobilizer control unit (ICU).

IMPORTANT: The replacement ICU must be
programmed the security data by scan tool.

Was the action complete?



Verify repair



11A-56 IMMOBILIZER SYSTEM (C24SE, 4JA1-T)

Special Tools

ILLUSTRATION

PART NO.

PART NAME

5-8840-2835-0

(J-35616-C)

Connector Test

Adapter Kit

(With Test Lamp)

Tech2 Kit

Scan Tool

5-8840-0285-0

(J-39200)

Digital Multimeter

ANTITHEFT SYSTEM 11B-1

SECTION 11B

ANTITHEFT SYSTEM

TABLE OF CONTENTS

Service Precaution. . . . . . . . . . . . .. 11B- 2

General Description . . . . . . . . . . . . 11B- 2

Diagrams And Schematics. . . . . . . . . 11B- 5

System Wiring Diagrams . . . . . . . . 11B- 5

Parts Location . . . . . . . . . . . . . 11B- 6

Circuit Diagram . . . . . . . . . . . ..11B-10

Antitheft control unit (A). . . . . . . . ...11B-24

Pin-outs . . . . . . . . . . . . . . ...11B-24

Pin-Assignment . . . . . . . . . . . ...11B-25

lmportant information on Programming. . . ..11B-26

Tech-2 Scan Tool. . . . . . . . . . . ...11B-27

Operating Procedure . . . . . . . . . ...11B-27

Menu . . . . . . . . . . . . . . . ...11B-28

DTC . . . . . . . . . . . . . . . . .11B-28

Clear DTC Information . . . . . . . . . 11B-28

Tech-2 Data Display. . . . . . . . . . 11B-28

Actuator Test. . . . . . . . . . . . ...11B-28

Programming. . . . . . . . . . . . ...11B-30

Tech-2 Data List. . . . . . . . . . . ..11B-35

Diagnosis. . . . . . . . . . . . . . . 11B-36

Diagnostic procedure . . . . . . . . . ..11B-36

Clearing Diagnostic Trouble Codes . . . . 11B-36

Verifying Vehicle Repair . . . . . . . . ..11B-36

Diagnostic Aids. . . . . . . . . . . . 11B-36

Diagnostic Trouble Code (DTC) list

For Antitheft. . . . . . . . . . . . . .11B-37

Antitheft System Check . . . . . . . . ...11B-38

No Antitheft Lamp . . . . . . . . . . ...11B-39

DTC13 Security code not yet programmed. .11B-40

DTC14 No remote key programmed. . . ...11B-41

DTC16 Door lock actuators short circuit

to ground . . . . . . . . . . . . . . .11B-42

DTC20 Broken wire to door lock actuators . .11B-43

DTC21 Remote key 1 with random code

out of capture range . . . . . . . . . . 11B-44

DTC22 Remote key 2 with random code

out of capture range . . . . . . . . . . 11B-45

DTC23 Remote key 3 with random code

out of capture range . . . . . . . . . . 11B-46

DTC24 Remote key 4 with random code

out of capture range . . . . . . . . . . 11B-47

DTC25 Remote key 5 with random code

out of capture range . . . . . . . . . . 11B-48

DTC28 Input immobilizer short circuit

to ground . . . . . . . . . . . . . . .11B-49

DTC29 Broken wire to immobilizer . . . . .11B-50

DTC31 Actuator driver door defect . . . . .11B-51

DTC32 Actuator passenger door defect . . .11B-52

DTC36 Broken wire to driver door. . . . ...11B-53

DTC37 Broken wire to passenger door. . ...11B-54

DTC41 Driver door Lock switch unlock

defect . . . . . . . . . . . . . . . ..11B-55

DTC42 Driver door Lock switch lock defect . 11B-56

DTC43 Driver door Lock switch Super lock

defect . . . . . . . . . . . . . . . ..11B-57

DTC44 Passenger door Lock switch lock

defect . . . . . . . . . . . . . . . ..11B-58

DTC45 Passenger door Lock switch unlock

defect . . . . . . . . . . . . . . . ..11B-59

DTC47 Battery voltage for door lock actuators

is missing . . . . . . . . . . . . . . 11B-60

DTC50 A/D converter defect or battery

voltage less than 9 volt. . . . . . . . . 11B-61

DTC51 EEPROM defect . . . . . . . . .11B-62

DTC52 EEPROM not programmed

by ISUZU. . . . . . . . . . . . . . .11B-63

DTC55 Control unit defect. . . . . . . ...11B-64

DTC123 Output flasher short circuit to ground

or broken wire . . . . . . . . . . . . .11B-65

DTC125 Output alarm horn broken wire . . .11B-66