Isuzu KB P190. Manual — part 1502

11B-54 ANTITHEFT SYSTEM

DTC 37 Broken Wire To Passenger Door

Step Action Value

(s)

Yes

No

1

Was the Antitheft System Check performed?

— Go

to

Step 2

Go to antitheft

System Check

2

Recheck the DTC.

1. Key position is “OFF”.

2. Install the Tech-2 on vehicle.

3. Key position is “ON”.

4. Check the DTC on the Tech-2.
Is DTC 37 stored?

—

Go to Step 3

Refer to

Diagnostic Aids

3

Check the passenger door lock function.

1. Key position is “OFF”.

2. Install the Tech-2 on vehicle.

3. Key position is “OFF”.

4. Observe to display door lock data with the Tech-2.

5. Turn ON by passenger door lock.
Does the Tech-2 display Closed ?

—

Go to Step 4 Go

to

Step 5

4

1. Key position is “ON”.

2. Observe to display door lock data with the Tech-2.

3. Turn OFF by passenger door lock.
Does the Tech-2 display Open ?

—

Refer to

Diagnostic Aids,

and then go to

step 5 Go

to

Step 5

5

1. Check the passenger door lock circuit for an open,

short to ground, or short to voltage.

Also, check the motor connector for damage.

2. If a problem found, repair as necessary.
Was the problem found?

—

Verify repair

Go to Step 6

6

1. Repair or replace the passenger door lock.

2. Check the DTC on the Tech-2.
Is DTC 37 stored?

—

Go to Step 7 Verify

repair

7

Replace the antitheft control unit (ACU).

IMPORTANT: The replacement ACU must be
programmed the security data by the Tech-2.

Was the action complete?

—

Verify repair

—

ANTITHEFT SYSTEM 11B-55

DTC 41 Driver Door Lock Switch Unlock Defect

Step Action Value

(s)

Yes

No

1

Was the Antitheft System Check performed?

— Go

to

Step 2

Go to antitheft

System Check

2

Recheck the DTC.

1. Key position is “OFF”.

2. Install the Tech-2 on vehicle.

3. Key position is “ON”.

4. Check the DTC on the Tech-2.
Is DTC 41 stored?

—

Go to Step 3

Refer to

Diagnostic Aids

3

Check the driver door lock function.

1. Key position is “OFF”.

2. Install the Tech-2 on vehicle.

3. Key position is “OFF”.

4. Observe to display door lock switch data with the

Tech-2.

5. Turn ON by driver door lock.
Does the Tech-2 display Closed?

—

Go to Step 4 Go

to

Step 5

4

1. Key position is “OFF”.

2. Observe to display door lock data with the Tech-2.

3. Turn OFF by driver door lock.
Does the Tech-2 display Open ?

—

Refer to

Diagnostic Aids,

and then go to

step 5 Go

to

Step 5

5

1. Check the driver door lock switch circuit for an

open, short to ground, or short to voltage.

Also, check the door lock connector for damage.

2. If a problem found, repair as necessary.
Was the problem found?

—

Verify repair

Go to Step 6

6

1. Repair or replace the driver door lock switch.

2. Check the DTC on the Tech-2.
Is DTC 41 stored?

—

Go to Step 7 Verify

repair

7

Replace the antitheft control unit (ACU).

IMPORTANT: The replacement ACU must be
programmed the security data by the Tech-2.

Was the action complete?

—

Verify repair

—

11B-56 ANTITHEFT SYSTEM

DTC 42 Driver Door Lock Switch lock Defect

Step Action Value

(s)

Yes

No

1

Was the Antitheft System Check performed?

— Go

to

Step 2

Go to antitheft

System Check

2

Recheck the DTC.

1. Key position is “OFF”.

2. Install the Tech-2 on vehicle.

3. Key position is “ON”.

4. Check the DTC on the Tech-2.
Is DTC 42 stored?

—

Go to Step 3

Refer to

Diagnostic Aids

3

Check the driver door lock function.

1. Key position is “OFF”.

2. Install the Tech-2 on vehicle.

3. Key position is “OFF”.

4. Observe to display door lock switch data with the

Tech-2.

5. Turn ON by driver door lock.
Does the Tech-2 display Closed?

—

Go to Step 4 Go

to

Step 5

4

1. Key position is “OFF”.

2. Observe to display door lock data with the Tech-2.

3. Turn OFF by driver door lock.
Does the Tech-2 display Open ?

—

Refer to

Diagnostic Aids,

and then go to

step 5 Go

to

Step 5

5

1. Check the driver door lock switch circuit for an

open, short to ground, or short to voltage.

Also, check the door lock connector for damage.

2. If a problem found, repair as necessary.
Was the problem found?

—

Verify repair

Go to Step 6

6

1. Repair or replace the driver door lock switch.

2. Check the DTC on the Tech-2.

Is DTC 42 stored?

— Go

to

Step 7 Verify

repair

7

Replace the antitheft control unit (ACU).

IMPORTANT: The replacement ACU must be
programmed the security data by the Tech-2.

Was the action complete?

—

Verify repair

—

ANTITHEFT SYSTEM 11B-57

DTC 43 Driver Door Lock Switch Super lock Defect

Step Action Value

(s)

Yes

No

1

Was the Antitheft System Check performed?

— Go

to

Step 2

Go to antitheft

System Check

2

Recheck the DTC.

1. Key position is “OFF”.

2. Install the Tech-2 on vehicle.

3. Key position is “ON”.

4. Check the DTC on the Tech-2.
Is DTC 43 stored?

—

Go to Step 3

Refer to

Diagnostic Aids

3

Check the driver door lock function.

1. Key position is “OFF”.

2. Install the Tech-2 on vehicle.

3. Key position is “OFF”.

4. Observe to display door lock switch data with the

Tech-2.

5. Turn ON by driver door lock.
Does the Tech-2 display Closed?

—

Go to Step 4 Go

to

Step 5

4

1. Key position is “OFF”.

2. Observe to display door lock data with the Tech-2.

3. Turn OFF by driver door lock.
Does the Tech-2 display Open?

—

Refer to

Diagnostic Aids,

and then go to

step 5 Go

to

Step 5

5

1. Check the driver door lock switch circuit for an

open, short to ground, or short to voltage.

Also, check the door lock connector for damage.

2. If a problem found, repair as necessary.
Was the problem found?

—

Verify repair

Go to Step 6

6

1. Repair or replace the driver door lock switch.

2. Check the DTC on the Tech-2.
Is DTC 43 stored?

—

Go to Step 7 Verify

repair

7

Replace the antitheft control unit (ACU).

IMPORTANT: The replacement ACU must be
programmed the security data by the Tech-2.

Was the action complete?

—

Verify repair

—