2006 ACURA CSX ignition

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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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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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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Cavity Wire Test conditionTest: Desired result Possible cause if desired result
is not obtained
Cavity Wire Test condition Test: Desired result Possible cause if desired result
is not obtained
22-331
5. With the connector still disconnected, do these input tests at the following connector.
 If any test indicates a problem, find and correct the cause, then recheck the system.
 If all the input tests prove OK, go to step 6.




1 ORN Under all
conditions Measure the voltage between
immobilizer-keyless control unit
7P connector terminals No. 1
and body ground:
There should be battery voltage. Blown No. 23 (10 A) fuse in
the under-hood fuse/relay
box
An open in the wire
2 YEL Ignition switch ON (II) Measure the voltage to ground:
There should be battery voltage. Blown No. 2 (15 A) fuse in the
under-dash fuse/relay box
An open in the wire
6. Reconnect the connector to the immob ilizer-keyless control unit, and do these input tests at the following
connector.
 If any test indicates a problem, find and correct the cause, then recheck the system.
 If all the input tests prove OK, the immobilizer-keyless control unit must be faulty; replace it.





7 BLK Under all
conditions Measure the voltage to ground:
There should be less than 0.5 V. Poor ground (G101)
An open in the wire
6 PNK Ignition key inserted into the
ignition switch Measure the voltage to ground:
There should be less than 1 V.
Poor ground (G504)
Faulty ignition key switch
An open in the wire
08/08/21 14:37:09 61SNR030_220_0333
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Î(#' 
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µ´
µ
´
´
´
23-20Audio System
Circuit Diagram
3
G2 21 G1
SCTY
RADIO
K-LINE
PUR
PUR
UNDER-DASH FUSE/RELAY BOX
AM/FM ANTENNA
UNDER-HOOD FUSE/RELAY BOX
() ()AM/FM ANTENNA LEAD
AM/FM ANTENNA SUBLEAD
G3
ILL A1
RED RADIO ACC
SCTY
RADIO
K-LINE Q8 Q4 Q1 Q14
LT BLU A6 A4 GRN WHT
A17
VSP
ECM/PCM
BLU A14
PUR
MICU
ACC HOT in ACC (I) and ON (II)
ORN RED
WHT
ACC
BAT
IGNITION SWITCH
No. 23 (10 A)
No. 2 (IG) (50 A)
BATTERY
No. 1 (BAT) (100 A)
A10 A13
ILL
AUDIO UNIT or NAVIGATION UNIT
GRY
ANT B
10 k
1.2 k
470
270
100
CH
( DOWN
VOL VOL UP
( MODEBRN
B6
BRN
3.9 k
)
) CH
RED/BLK GRN/RED B7
PNK
GRN SW REMOTE AUDIO
AUDIO
REMOTE
GND
9 4 3
10
AUDIO REMOTE SWITCH
BLK
G505
GND RADIO
A9
No. 14 (7.5 A) FUSE
(In the under-dash
fuse/relay box)
DASH LIGHTS
BRIGHTNESS
CONTROLLER AM/FM
ANTENNA
AMPLIFIER
No.14(7.5A)FUSE
(In the under-dash
fuse/relay box) CABLE
REEL CABLE
REEL
DASH LIGHTS
BRIGHTNESS
CONTROLLER STEREO
AMPLIFIER
LT GRN
STEREO
AMPLIFIER No. 17
(15 A)
D1
D4 C2
G2 No. 35
(7.5 A)
(Type S model)
VSPA29 (Type S model)
RADIO B
BRN
VOICE
CONTROL
SWITCH
J3
(With navigation)
RF
SH
RF
IN
2
1
08/08/21 14:03:48 61SNR030_230_0023
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Without Navigation
Serial Number Display Mode
Eight digits of the serial number (example 12345678)
23-23
Self-diagnostic Function
A
The audio system has a self-diagnostic function.
To obtain the audio unit serial number on a vehicle, do the following:
NOTE: This procedure can only be performed when the battery power is disconnected from the audio unit and the audio unit displays CODE.
 To obtain the navigation unit serial number, refer to Navi ECU in the navigation system diagnostic mode (see page 23-135).
1. Turn the ignition switch to ON (II).
2. Make sure the audio system is turned off.
3. Push and hold the preset No. 1 and No. 6 buttons.
4. While holding the buttons, push the VOL PUSH PWR knob (A) to ON.
5. Release the buttons and the self-diagnostic begins.
6. The display shows a 8 digit serial number.
7. Use all 8 numbers as the serial number when using the Interactive Network (iN) to retrieve the 5 digit anti-theft code.
8. To end the self-diagnostic function, turn the audio unit off, or turn the ignition switch to LOCK (0).
(cont’d)
08/08/21 14:03:50 61SNR030_230_0026
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Î
How to check for audio system condition
No. 3 button
No. 4 button
No. 5 button
FM button (Push and hold 5 sec.)
CD button (Push and hold 5 sec.)
23-24Audio System
Self-diagnostic Function (cont’d)
A
NOTE:
 The audio unit must be in the code enter screen before performing the self-diagnostic function.
 The self-diagnostic function does not find every problem with the audio system. Check any official H onda service
website for more information about the audio system.
1. Turn the ignition switch to ON (II).
2. Make sure the audio system is turned off.
3. Push and hold the preset No. 1 and No. 6 buttons.
4. While holding the buttons, push the VOL PUSH PWR knob (A) to ON.
5. Release the buttons and the self-diagnostic begins.
6. When you are in the self-diagnostic mode, pressing a preset button starts the diagnostic mode that is assigned to that preset switch.
Entire LCD lighting/light-out mode: Turns on/off the entire LCD to show the presence or absence of an LCD failure.
The entire display must appear. If there are dead segments, replace the audio unit.
Duty indication mode (for the Illumination dim): Indicates the duty for the Illumination dim when the dash lights
are on.
Vehicle speed pulse indication mode: Indicates the vehicle speed pulse.
Reception level check mode: Indicates the reception level (dB). When entering the reception level check mode, the
AM/FM button is used to change the main/sub antenna. See reception level indication for more information.
DRAM residual quantity indication mode: Indicates the DRAM residual quantity.
08/08/21 14:03:50 61SNR030_230_0027
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ÎDisplay Specifications
Speaker check mode
23-25
Entry LCD Lighting
No. 3 button Entry LCD Lights-outs
No. 3 button
Duty (for the illumination) indication
No. 4 button
Vehicle speed pulse indication
No. 5 button
Reception level indication
FM button
DRAM residual quantity indication
CD button
7. To end the self-diagnostic function, turn the audio unit off, or turn the ignition switch to LOCK (0).
8. Turn off the audio unit.
9. Push and hold the No. 1 and No. 3 buttons. While holding the buttons, push the VOL push PWR knob to ON. Release the buttons and the speaker check mode begins. A low-frequency hum should sound for about one
minute. Change the test speaker by pushing the SKIP button. If you find a speaker(s) with no sound, check the
speaker and harness connections. If the connections are good, replace the speaker, and retest.
10. To end the self-diagnostic function, turn the audio unit off, or turn the ignition switch to LOCK (0).
(cont’d)
08/08/21 14:03:51 61SNR030_230_0028
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