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Acura CSX. Manual - part 570

System

Check No.

System Check

Possible Cause

22-327

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C-1

The imoes unit is
not registered

Imoes unit was not registered.
No communication between the imoes unit and the immobilizer-
keyless control unit because of low battery voltage.
No communication between the imoes unit and the immobilizer-
keyless control unit because of interference.

C-2

Error of
communication
format in imoes
unit

D-1

S-net line short

Harness short from the ECM/PCM to the immobilizer-keyless control
unit. (IMOCD (S-net) line short)
No communication between the ECM/PCM and the immobilizer-
keyless control unit because of low battery voltage.
No communication between the immobilizer-keyless unit and the
ECM/PCM because of interference.
Immobilizer-keyless control unit failure
ECM/PCM failure

D-2

No communication
between imoes
unit and
immobilizer unit

Blown fuse
Harness open from the imoes unit to the immobilizer-keyless control
unit. (IMOCD (S-net) line open)
No communication between the imoes unit and the immobilizer-
keyless control unit because of low battery voltage.
No communication between the imoes unit and the immobilizer-
keyless control unit because of interference.
Immobilizer-keyless control unit failure
Imoes unit failure

D-3

No communication
between ECM/PCM
and immobilizer
unit

Blown fuse
Harness open from the ECM/PCM to the immobilizer-keyless control
unit.
No communication between the ECM/PCM and the immobilizer-
keyless control unit because of low battery voltage.
No communication between the immobilizer-keyless control unit
and the ECM/PCM because of interference.
Immobilizer-keyless control unit failure
ECM/PCM failure

E-1

Initial registration
of immobilizer unit
is not completed

The immobilizer-keyless control unit is not registered. Try to register
the immobilizer-keyless control unit using the HDS.

E-2
E-3
E-4
E-5
F-1

Special Mode

Turn the ignition switch to ON (II) and to LOCK (0) with the registered
key.

F-2
F-3
F-4
F-5

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Status Log No.

Detected Item

Probable Cause

22-328

Immobilizer System

Status Log

If you suspect there is a immobilizer system problem, check the status log in the HDS.

1. Connect the HDS to the data link connector.

2. Turn the ignition switch to ON (II).

3. On the HDS screen, at MAIN MENU, enter IMMOBILIZER, then select IMMOBILIZER SET-UP, select IMMOBILIZER INFORMATION, then

select STATUS LOG.

4. Check the STATUS LOG count. Troubleshoot the status with the highest count first. If no counts are listed, the immobilizer system is OK.

Continue with normal symptom troubleshooting.

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A-1

KEY CODE MISMATCH
(Code format normal, but code
data is mismatch)

The key was not registered
Interference from metal such as key chains
Low battery voltage

A-2

KEY CODE MISMATCH
(Code format failure)

Ignition switch was turned to ON (II) with another type of immobilizer key or
aftermarket key
Interference from metal such as key chains
Low battery voltage

A-3

KEY CODE MISMATCH
(No key code or non-
immobilizer key)

Ignition switch was turned to ON (II) with another type of immobilizer key or
aftermarket key
Interference from metal such as key chains
Low battery voltage
Key failure
Immobilizer-keyless control unit failure

B-1

ECM/PCM CODE MISMATCH
(Code format normal, but code
data is mismatch)

ECM/PCM was not registered correctly
Low battery voltage
Poor or loose terminal connections at the immobilizer-keyless control unit
Communication line electrical noise

B-2

ECM/PCM MISMATCH
(Code format failure)

ECM/PCM was not registered correctly
Low battery voltage
Poor or loose terminal connections at the immobilizer-keyless control unit
Communication line electrical noise

C-1

IMOES UNIT mismatch (Code
format normal, but data is
mismatch)

Imoes unit was not registered
The communication was not good between imoes unit and immobilizer unit
by battery voltage low
The communication was not good between imoes unit and immobilizer unit
by influence of some noise

C-2

IMOES UNIT mismatch (Code
format failure)

Imoes unit was not registered correctly
The communication was not good between imoes unit and immobilizer unit
by battery voltage low
The communication was not good between imoes unit and immobilizer unit
by influence of some noise

D-1

SECURITY-NET LINE PROBLEM
IMOCD (S-NET)
(Short to ground)

Low battery voltage
Poor or loose terminal connections at the immobilizer-keyless control unit and
the ECM/PCM
Communication line electrical noise

D-2

SECURITY-NET LINE PROBLEM
(No communication)

Blown fuse
Harness open from imoes unit to immobilizer unit
The communication was not good between imoes unit and immobilizer unit
by battery voltage low
The communication was not good between imoes unit and immobilizer unit
by influence of some noise
Imoes unit failure
Immobilizer unit failure

D-3

SECURITY-NET LINE PROBLEM
IMOCD (S-NET)
(Open line or ECM/PCM failure)

Open or short in the harness from the ECM/PCM to the immobilizer-keyless
control unit
Low battery voltage
Poor or loose terminal connections at the immobilizer-keyless control unit and
the ECM/PCM
Communication line electrical noise

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Add one new key/Keyless transmitter

Add and Delete keys/Keyless transmitters,
Then select Delete or Add keys

All keys are lost

Programming immobilizer-keyless control
unit

22-329

Immobilizer Key Registration

NOTE:

• The HDS is required for registration of the

immobilizer keys.

• Programming the immobilizer also programs the

keyless transmitter.

• Check for aftermarket electrical equipment that can

cause problems with transponder operation.

• The immobilizer-keyless control unit can store up to

six immobilizer keys.

1. Have a registered key, a new immobilizer key, and

the first password from the iN system.

2. Connect the HDS to the data link connector.

3. Turn the ignition switch to ON (II).

4. Select IMMOBILIZER from the SYSTEM SELECT

menu.

5. Select Add and Delete keys, then Add 1 key.

6. Do the registration according to the instructions on

the HDS screen.

7. Check if the engine can be started with the newly

registered key.

8. When prompted by the HDS, do the keyless

transmitter programming.

1. Have all registered keys, all new keys, and the first

password from the iN system.

2. Connect the HDS to the data link connector.

3. Turn the ignition switch to ON (II).

4. Select IMMOBILIZER from the SYSTEM SELECT

menu.

5. Select Add and Delete Keys, or Delete or Add

Multiple Keys.

6. Do the registration according to the instructions on

the HDS screen.

7. Check if the engine can be started with all the

registered keys.

8. When prompted by the HDS, do the keyless

transmitter programming.

1. Prepare all new keys and have the immobilizer

ECM/PCM code.

2. Connect the HDS to the data link connector.

3. Turn the ignition switch to ON (II).

4. Select IMMOBILIZER from the SYSTEM SELECT

menu.

5. Select Add and Delete keys, then ALL KEYS LOST.

6. Do the registration according to the instructions on

the HDS screen.

7. Check if the engine can with started by all the

registered keys.

8. When prompted by the HDS, do the keyless

transmitter programming.

1. Have all registered keys and the ECM/PCM code.

2. Connect the HDS to the data link connector.

3. Turn the ignition switch to ON (II).

4. Select IMMOBILIZER from the SYSTEM SELECT

menu.

5. Select REPLACE IMMOBILIZER/KEYLESS

CONTROL UNIT REPLACE.

6. Do the registration according to the instructions on

the HDS screen.

7. Check that the engine can be started with all

registered keys.

8. When prompted by the HDS, do the keyless

transmitter programming.

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22-330

Immobilizer System

Immobilizer-keyless Control Unit Input Test

WHT

BLK

PNK

YEL

NOTE: Before testing the immobilizer system, troubleshoot the system using B-CAN System Diagnosis Test Mode A
(see page 22-93) and check the No. 10 (7.5 A) and No. 38 (30 A) fuses in the under-dash fuse/relay box.

1. Remove the driver’s dashboard lower cover (see page 20-102).

2. Remove the steering column covers (see page 17-9).

3. Disconnect the 7P connector (A) from the immobilizer-keyless control unit (B).

4. Inspect the connector and socket terminals to be sure they are all making good contact.

• If the terminals are bent, loose or corroded, repair them as necessary, and recheck the system.
• If the terminals look OK, go to step 5.

Wire side of female terminals

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Content .. 568 569 570 571 ..