ECU ACURA CSX 2006 Service Repair Manual



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Driver’s door Front passenger’s door
22-139
Door Lock Switch Test
1. Remove the power window master switch and
disconnect its connector (see page 22- 219).
2. Check for continuity between the power window master switch 22P connector terminals.
 There should be continuity between terminals No. 11 and No. 17 when the door lock switch is in
the LOCK position. (With security)
 There should be no continuity between terminals No. 11 and No. 17 when the door lock switch is in
the UNLOCK position. (With security)
 There should be continuity between terminals No. 11 and No. 19 when the door lock switch is in
the UNLOCK position.
 There should be no continuity between terminals No. 11 and No. 19 when the door lock switch is in
the LOCK position.
3. If the continuity is not as specified, replace the power window master switch. 1. Remove the front passenger’s power window
switch (see page 22-220).
NOTE: The illustration shows the front passenger’s
door.
2. Check for continuity between the front passenger’s power window switch 8P connector terminals.
 There should be continuity between terminals No. 1 and No. 2 when the door lock switch is in
the LOCK position.
 There should be no continuity between terminals No. 1 and No. 2 when the door lock switch is in
the UNLOCK position.
 There should be continuity between terminals No. 2 and No. 6 when the door lock switch is in
the UNLOCK position.
 There should be no continuity between terminals No. 2 and No. 6 when the door lock switch is in
the LOCK position.
3. If the continuity is not as specified, replace the front passenger’s window switch.
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22-140Keyless/Power Door Locks/Security System
Door Key Cylinder Switch Test
A
B
1. Remove the driver’s door panel (see page 20-7).
2. Disconnect the 10P connector (A) from the key
cylinder switch (B).
3. Check for continuity between the terminals.  There should be continuity between terminalsNo. 9 and No. 5 when the door key cylinder
switch is in LOCK position. (With security)
 There should be no continuity between terminals No. 9 and No. 5 when the door key cylinder
switch is in the neutral or UNLOCK position.
(With security)
 There should be continuity between terminals No. 8 and No. 5 when the door key cylinder
switch is in UNLOCK position.
 There should be no continuity between terminals No. 8 and No. 5 when the door key cylinder
switch is in the neutral or LOCK position.
4. If the continuity is not as specified, replace the door key cylinder assembly (see page 20-9).
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With HDS
22-142 Keyless/Power Door Locks/Security System
Transmitter Test/Replacement
A
NOTE:
 If the doors unlock or lock with the transmitter, but the LED on the transmitter does not come on, the LED
is faulty; replace the transmitter.
 If any door is open, you cannot lock the doors with the transmitter.
 If you unlocked the doors with the transmitter, but do not open any of the doors within 30 seconds, the
doors relock automatically.
 The doors do not lock or unlock with the transmitter if the ignition key is inserted in the ignition switch.
1. Press the lock or unlock button five or six times to reset the transmitter.
 If the locks work, the transmitter is OK.
 If any of the transmitter buttons do not work, replace the transmitter, then do the transmitter
programming registration (see page 22-329).
 If the locks don’t work, go to step 2.
2. Connect the HDS to the data link connector.
3. Select the KEYLESS from the BODY ELECTRICAL menu, then enter the KEYLESS CHECK.
4. Press lock, unlock, trunk, or panic button and check the response on the screen of the HDS.
NOTE: The door lock actuators may or may not
cycle when receiving input from the transmitter.
 If KEYLESS ENTRY TRANSMITTER CODE IS RECEIVED is indicated, the transmitter is OK. Go
to keyless operation troubleshooting (see page
22-127).
 If DIFFERENT KEYLESS ENTRY TRANSMITTER CODE IS RECEIVED is indicated, the transmitter is
not registered to the vehicle, if necessary,
reprogram and register the transmitter (see page
22-329).
 If KEYLESS ENTRY TRANSMITTER CODE IS NOT RECEIVED is indicated, go to step 5. 5. Open the transmitter and check for water damage.
 If you find any water damage, replace thetransmitter, then reprogram and register the
transmitter (see page 22-329).
 If there is no water damage, go to step 6.
6. Replace the transmitter battery (A) with a new one, and press lock or unlock button and check the
receive condition on the screen of the HDS.
 If KEYLESS ENTRY TRANSMITTER CODE IS RECEIVED is indicated, the transmitter is OK.
 If KEYLESS ENTRY TRANSMITTER CODE IS NOT RECEIVED is indicated, go to step 7.
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22-144Keyless/Power Door Locks/Security System
Transmitter Test/Replacement (cont’d)
A
4. Replace the transmitter battery (A) with a new one,
and try to lock and unlock the doors with the
transmitter by pressing the lock or unlock button
five or six times.
 If the doors lock and unlock, the transmitter is OK.
 If the doors don’t lock and unlock, go to step 5.
5. Reprogram and register the transmitter (see page 22-329), then try to lock and unlock the doors.
 If the doors lock and unlock, the transmitter is OK.
 If the doors don’t lock and unlock, substitute a known-good transmitter and recheck (see page
22-329). If still not operating, replace the
immobilizer-keyless control unit.
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The Indicator Drive Circuit Check
Switch Input Check
The Beeper Drive Circuit Check
The LCD Segment Check
The Gauge Drive Circuit Check
22-242Gauges
Self-diagnostic Function (cont’d)
OFF ON
OFF ON
OFF ON
OFF ON
Gauge needles
Beeper
5sec.
Self-diagnostic
mode
SEL/RESET
SWITCH
When entering the self-diagnostic mode, the following indicators blink:
A/T gear position indicator, ABS indicator, brake system indicator, charging system indicator, cruise control indicator,
cruise main indicator, door indicator, DRL indicator, EPS indicator, fog light indicator , high beam indicator,
immobilizer indicator, lights-on indicator, low fuel indicator, low oil pressure indicator, low tire pressure indicator ,
maintenance minder indicator, malfunction indicator lamp (MIL), REV limit indicator (TYPE S model), seat belt
reminder indicator, security indicator, side airbag cutoff indicator, SRS indicator, TPMS indicator , trunk indicator,
VSA activation indicator , VSA indicator , and washer fluid level indicator.
1: ’07 TYPE S and ’08-09 models
2: ’08-09 models
3: TYPE S and ’08 Premium and ’09 models
At the initial stage of the self-diagnostic function, the beep sounds intermittently, the beeper sounds continuously
when any of the following switch inputs are switched from OFF to ON:
Cruise control main, dash lights brightness controller volume ( ), ( ) button, mph km/h switch, parking brake switch,
SEL/RESET switch, SET, RESUME, CANCEL switches, and VSA OFF switch . : ’07 TYPE S and ’08-09 models
When entering the self-diagnostic mode, the beeper sounds five times.
When entering the self-diagnostic mode, all the segments blink five times.
When entering the self-diagnostic mode, the tachometer needle sweeps from the minimum position to maximum
position, then returns to the minimum position.
NOTE:
After the beeper stops sounding and the gauge needle returns to the minimum position, pushing the SEL/RESET
switch starts the Beeper Drive Circuit Check (one beep) and the Gauge Drive Circuit Check again.
The check cannot be started again until the gauge needle returns to the minimum position.
If the needle fails to sweep, or the beeper does not sound, replace the gauge control module (tach).
3 2
2
11
The needle sweeps from the
minimum position to the
maximum position, then return
to the minimum position.
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Except TYPE S model
22-258Gauges
Circuit Diagram - Gauge Control Module (Speedo)
UART
No. 10
(7.5 A)
No. 1 (BAT) (100 A)
IGNITION SWITCH
BATTERY
No. 23 (10 A)WHT
BLU
BAT
IG1
ORN
No. 2 (IG) (50 A)
BRN
WHT BRN
UNDER-HOOD FUSE/RELAY BOX
IG1 HOT in ON (II) and START (III)
WHT
DRIVE CIRCUIT DRIVE CIRCUIT
5
MAIN CIRCUIT LT GRN7GAUGE CONTROL MODULE (SPEEDO)
6
BLINKING
CIRCUIT
GAUGE
CONTROL
MODULE
(TACH)
10 V
STABILIZING
CIRCUIT
LOW FUEL
INDICATOR
(LED)
SECURITY
INDICATOR
(LED)
FUEL
METER
LCD
TEMP
METER
LCD
SPEEDOMETER
LCD GAUGE CONTROL
MODULE (TACH)UNDER-DASH
FUSE/RELAY
BOX
H1
D4 G2D2
P5 Q1 Q9P10
MICU
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TYPE S model
22-260Gauges
Circuit Diagram - Gauge Control Module (Speedo) (cont’d)
UART
No. 10
(7.5 A)
No. 1 (BAT) (100 A)
IGNITION SWITCH
BATTERY
No. 23 (10 A)WHT
BLU
BAT
IG1
ORN
No. 2 (IG) (50 A)
BRN
WHT BRN
UNDER-HOOD FUSE/RELAY BOX
IG1 HOT in ON (II) and START (III)
WHT
DRIVE CIRCUIT DRIVE CIRCUIT
5
MAIN CIRCUIT GRY1GAUGE CONTROL MODULE (SPEEDO)
6
BLINKING
CIRCUIT
GAUGE
CONTROL
MODULE
(TACH) LOW FUEL
INDICATOR
(LED)
SECURITY
INDICATOR
(LED)
FUEL
METER
LCD
TEMP
METER
LCD
SPEEDOMETER
LCD GAUGE CONTROL
MODULE (TACH)UNDER-DASH
FUSE/RELAY
BOX
H1
D4 G2D2
P5 Q1 Q9P10
REV LIMIT
INDICATOR
(LED)
DIMMING
CIRCUIT DRIVE
CIRCUIT
MICU
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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
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Overview
Speed-sensitive volume compensation (SVC)Contents Audio output
Left front CH Right front CH Right rear CH Left rear CH
23-6 Audio System
System Description
The audio unit acts as the processor for all audio functions. Select audio functions from the audio unit, the audio
remote (on the steering wheel), or by using the navigation voice control system. The audio display provides the
current audio status. For vehicles with navigation, additional audio information is available by touching the audio
button on the navigation audio screen (See the owner’s manual and the navigation system manual for more details.).
The XM receiver passes its signal to the audio unit. In addition, it communicates with the audio unit via the GA-Net bus.
Any open connections in the GA-Net bus circuit causes audio and navigation functions to appear inoperative.
For vehicles with navigation, pressing the open/close switch on the navigation display panel allows access to the CD
slot and PC card.
A security signal is daisy-chained between the audio and vehicle components for integration into the vehicle’s security
system.
Some audio systems are equipped with speed-sensitive volume compensation (SVC). The navigation or audio unit
receives the vehicle speed pulse (VSP) from the ECM/PCM. The system processes the speed input and increases the
navigation or audio system volume level as the vehicle speed increases to compensate for the various interior noises
that occur at higher speeds. When the vehicle slows down, the volume returns to its normal level. The SVC has four
settings: SVC OFF, LOW, MID and HIGH that can be adjusted using the navigation or audio unit. The SVC comes from
the factory with the MID setting as the default.
To change the audio unit SVC setting, press the tune folder sound knob repeatedly until the SVC is displayed, rotate
the knob to adjust the SVC to the desired setting (SVC OFF, LOW, MID, or HIGH).
To change the navigation unit SVC setting, press the AUDIO button, and then select the SOUND icon on the navigation
display. Press the navigation display to select the desired setting (OFF, LOW, MID, HI).
The navigation system allows voice control for the audio, XM, PC card, and CD player. The GA-Net (audio unit)
communicates the voice control commands. When using the navigation TALK/BACK button, the audio is muted on all
speakers and you hear navigation sound on the front channels. When using the navigation or route guidance (RG), the
front speakers provides the navigation sound and the rear speakers continue to play. For more information, see the
navigation section. The outline of the interruption function is shown in this table.
Navigation
TALK/BACK Buttons Navigation voice
output Navigation voice
output Muted Muted
Route guidance Navigation voice outputNavigation voice
output Audio Audio
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GA-Net Bus Configuration
System Diagram (With navigation)
23-7
Reverse signalGPS antenna
AM/FM antenna Speakers
Navigation unit
Navi DVD
Navigation/Audio Display Screen
CLOCK
(Set by GPS)
Stereo Amplifier
(Premium sound
system)
Color
signal
Accessory
(MusicLink,
CD changer, etc.)
XM Receiver
XM antenna
(satellite &
terrestrial)
Auxiliary jack
assembly
Audio remote
switches
(steering wheel)
Illumination
Signal
(lighted buttons)
AM/FM
receiverCD Player
(CD, MP3, WMA)
Audio
processor
PC Card Slot (for playing audio
MP3, and WMA audio files) Navi
processor
(ECU)
GPS
receiver
Yaw rate sensor
(senses turning)
DVD player
(navi maps)
GA-Net
Audio
Audio
Section
Navigaion
Section
Illumination
(Night/Day
display mode)
ECM/PCM
(vehicle speed pulses) Microphone
(on ceiling) TALK/BACK
voice buttons
(’08 model) Climate control unit
The GA-Net bus passes audio and navigation commands throughout the navigation and audio components.
These commands include navigation touch screen and hard button signals, audio/XM selections by voice, and XM
station and music title names. Because the entire bus is daisy chained between components (see diagram), any open
or short in the GA-Net bus harness will cause any or all of these functions to become inoperative. The addition of any
audio accessory must maintain the continuity of the GA-Net bus by installing the Y cable included with the accessory
kit.
(cont’d)
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