2006 ACURA CSX Service Repair Manual

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Page 2273 of 2893

ACURA CSX 2006 Service Repair Manual (#)Order of
Priority Symptom Possible cause
22-323
Symptom Troubleshooting
1. Troubleshoot the immob
ilizer system by the order of the priority shown:

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ACURA CSX 2006 Service Repair Manual

(#)
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Immobilizer indicator blinks
YES
NO
YES
NO YES
NO
YES
NO
22-324Immobilizer System
Symptom Troubleshooting (

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ACURA CSX 2006 Service Repair Manual (#)(#)
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Engine does not start with the immobilizer
key Immo

Page 2276 of 2893

ACURA CSX 2006 Service Repair Manual (#)System
Check No. System Check Possible Cause
22-326Immobilizer System
System Check
1. Connect the HDS to the data link connector.
2. Turn the ignition

(#')System
Check No. System Check Possible Cause
22-326Immobilizer System
System Check
1. Connect the HDS to the data link connector.
2. Turn the ignition switch to ON (II).
3. Monitor the SYSTEM CHECK in the IMMOBILIZER INFO with the HDS.
4. If the HDS displays NORMAL N-1, the immobilizer system is OK at this time, refer to the STATUS LOG. If the HDS
displays any other messages, check as follows:

A-1 The key is not
registered This key is not registered in the immobilizer-keyless control unit. Try
to register keys using the HDS.
No communication between the antenna and the immobilizer key
because of interference from metal such as key chains/key rings/
other keys.
Low battery voltage.
A-2 Communication error between the
key and
immobilizer unit Intermittent interruption between transponder and immobilizer-
keyless control unit.
The immobilizer key type is incorrect
non-Acura key.
Key failure (transponder failure)
No communication between the antenna and the immobilizer key
because of interference from metal such as key chains/key rings/
other keys.
Low battery voltage.
A-3 No communication between the key
and immobilizer
unit The ignition switch was turned to ON (II) with a non-immob
ilizer key.
The immobilizer key type is incorrect non-Acura key.
Key failure (transponder failure)
No communication between the antenna and the immobilizer key
because of interference from metal such as key chains/key rings/
other keys.
Low battery voltage.
Immobilizer-keyless control unit failure
B-1 The ECM/PCM is not registered The ECM/PCM was not registered. Try to register the ECM/PCM
using the HDS.
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.
Open in the IG1 line
B-2 Error of communication
format in ECM/
PCM The ECM/PCM was not registered. Try to register the ECM/PCM
using the HDS.
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.
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Page 2277 of 2893

ACURA CSX 2006 Service Repair Manual System
Check No. System Check Possible Cause
22-327

C-1 The imoes unit is
not registered Imoes unit was not registered.
No communication between the imoes

System
Check No. System Check Possible Cause
22-327

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 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.
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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Page 2278 of 2893

ACURA CSX 2006 Service Repair Manual (#)
Status Log No.Detected Item Probable Cause
22-328Immobilizer System
Status Log
If you suspect there is a immobilizer system problem, check the status

(#')
Status Log No.Detected Item Probable Cause
22-328Immobilizer 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.

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
08/08/21 14:37:01 61SNR030_220_0330
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Page 2279 of 2893

ACURA CSX 2006 Service Repair Manual (#
)
Add one new key/Keyless transmitter
Add and Delete keys/Keyless transmitters,
Then select Delete or Add keysAll keys are lost
Programming immobilizer

(#'
)
Add one new key/Keyless transmitter
Add and Delete keys/Keyless transmitters,
Then select Delete or Add keysAll 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.
08/08/21 14:37:08 61SNR030_220_0331
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Page 2280 of 2893

ACURA CSX 2006 Service Repair Manual
(#)
22-330Immobilizer System
Immobilizer-keyless Control Unit Input Test
WHT
BLK
PNK
YEL AB
NOTE: Before testing the immobilizer system, troubleshoot

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