2006 ACURA CSX keyless

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22-100Multiplex Integrated Control System
Circuit Diagram
K5
G3 Q1 Q9
D2
LT BLU RED
No. 22 (7.5 A)
BLK
G501 T34
G602E6
BLK SG
G601E33
BLK
PG
H2
H1 Q6
B-CAN
MICU
G401 PNK
K4 G2
UNDER-DASH FUSE/RELAY BOX
UNDER-HOOD FUSE/RELAY BOX
WHTBRN
No. 10 (7.5 A)
BLK F20
No. 2 (IG) (50 A)
ORNIG1
BAT
BLU
WHT
No. 23 (10 A)
BATTERY
IGNITION SWITCH
No. 1 (BAT) (100 A)
MICU
SERVICE
CHECK
CONNECTOR IG1 HOT in ON (II)
and START (III)
CEILING
LIGHT
H1
D4 D2
LT BLU K-LINEQ8





 AUDIO UNIT*6
NAVIGATION
UNIT*5
DATA LINK
CONNECTOR
IMMOBILIZER-
KEYLESS
CONTROL UNIT
SRS UNIT
TPMS CONTROL
UNIT*3
ABS
MODULATOR-
CONTROL UNIT *1 EPS CONTROL
UNIT
VSA MODULATOR-
CONTROL UNIT *2 IG1
LT BLU
LT BLU F14
F28VBU
16
G501 BLK
1
18
PNK
No. 35 (7.5 A)
FUSE
(UNDER-DASH
FUSE/
RELAY BOX)
No. 23 (10 A)
FUSE
(UNDER-DASH
FUSE/
RELAY BOX)
15
PUR
WHT
HANDSFREELINK
CONTROL UNIT *4
(B-CAN)
PNK
PNK
(B-CAN)
08/08/21 14:25:00 61SNR030_220_0102
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DYNOMITE -2009-

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22-101







 124
19
1
RED
WHT CAN L
F-CAN TRANSCEIVER
CAN H
LT GRN
3
G504BLK
5
32
PNK
(B-CAN) (B-CAN) BRN/YELBRNLG
G101 BLK
7 2
IG1
YEL
VBU
B-CAN 1
4
PNK
16
BLK
G504 WHT
21
PNK GAUGE CONTROL MODULE (TACH)
BRN
WHT
17
18
MAIN CIRCUIT
B-CAN
TRANSCEIVER LCD DISPLAY
(DTC CODE DISPLAY)
IMMOBILIZER-KEYLESS
CONTROL UNIT
CLIMATE
CONTROL UNIT
No. 36 (10 A) FUSE
(UNDER-DASH
FUSE/RELAY BOX)
ABS MODULATOR-CONTROL UNIT*1
VSA MODURATOR-CONTROL UNIT*2
YAW RATE-LATERAL ACCELERATION
SENSOR*2
DATA LINK CONNECTOR
SRS UNIT
ECM/PCM
TPMS CONTROL UNIT*3
EPS CONTROL UNIT
WHT
: CAN line
No. 2 (15 A) FUSE
(UNDER-DASH
FUSE/RELAY BOX)
: Other communication line
*1: ’06 07 Touring and Premium models
*2: ’07 TYPE S and ’08 09 models
*3: ’08 09 models
*4: ’09 model with navigation system
*5: With navigation system
*6: Without navigation system
BLK*2
PNK
PNK
08/08/21 14:25:01 61SNR030_220_0103
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DTC B1000:
YES
NO
YES
NO Control Unit Connector
YES
NO Control Unit Appropriate Connector
22-102Multiplex Integrated Control System
DTC Troubleshooting
Communication Bus Line Error
(BUS-OFF)
NOTE: If you are troubleshooting multiple DTCs, be
sure to follow the instructions in B-CAN System
Diagnosis Test Mode A (see page 22-93).
1. Clear the DTCs with the HDS.
2. Turn the ignition switch to LOCK (0), and then back to ON (II).
3. Wait for at least 6 seconds.
4. Check for DTCs with the HDS.
Go to step 5.
Intermittent failure, the communication bus
line is OK at this time. Check for loose or poor
connections, or worn/shorted wires. If the
connections are good, check the battery condition
(see page 22-67) and the charging system.
5. Check for DTCs with the HDS.
Go to step 6.
Faulty MICU; replace the under-dash fuse/
relay box (see page 22-66). 6. Turn the ignition switch to LOCK (0).
7. Disconnect the appropriate connector at each
control unit in the table one at a time. Clear the
DTCs, then recheck for DTCs after each unit is
disconnected.
Gauge control
module (tach) 36P connector
Immobilizer-keyless
control unit 7P connector
Climate control unit 32P connector
HandsFreeLink
control unit 28P connector
Go to step 8.
Check the power and grounds to the control
unit that was disconnected when B1000 did not
reset. If OK, replace the control unit.
8. Disconnect all of the appropriate connectors for each of the units in the table.
Gauge control
module (tach) 36P connector
Immobilizer-keyless
control unit 7P connector
Climate control unit 32P connector
HandsFreeLink
control unit 28P connector
Is DTC B1000 indicated?
Ar e DT Cs B1008, B1011, and B1032 al soindicated? Is DT C B1000 indicated with each individual unit
d i sconnect ed ?
08/08/21 14:25:01 61SNR030_220_0104
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DTC B1900:
YES
NO
22-108 Multiplex Integrated Control System
DTC Troubleshooting (cont’d)
Communication Bus Line Error
(Bus OFF)
NOTE: If you are troubleshooting multiple DTCs, be
sure to follow the instructions in B-CAN System
Diagnosis Test Mode A (see page 22-93).
1. Clear the DTCs with the HDS.
2. Turn the ignition switch to LOCK (0), and then back to ON (II).
3. Wait for at least 6 seconds.
4. Check for DTCs with the HDS.
Troubleshoot DTC B 1000.
If only DTC B1900 is present, replace the
immobilizer-keyless control unit. If no DTCs are
present, it’s an intermittent failure, the system is
OK at this time. Check for loose or poor
connections at the immobilizer control unit 7P
connector, and at under-dash fuse/relay box
connector Q (16P).
Ar e DT Cs B1000, B1008, B1011, and B1032 also ind icated w ith DT C B1900?
08/08/21 14:25:02 61SNR030_220_0110
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DYNOMITE -2009-

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22-112Keyless/Power Door Locks/Security System
Component Location Index
NAVIGATION UNIT or
AUDIO UNIT
IMMOBILIZER-KEYLESS
CONTORL UNIT
(With built-in receiver)
SECURITY INDICATOR GAUGE CONTORL MODULE
(SPEEDO)
HEADLIGHT
HOOD SWITCH
MICU
(Built into the under-
dash fuse/relay box)
HORN
TRANSMITTER
LOCK BUTTON TRUNK BUTTON
UNLOCK BUTTON
IGNITION KEY PANIC BUTTONSymptom Troubleshooting,
page 22-126
Replacement, page 22-332
Replacement, page 22-174
Adjustment, page 22-173
Bulb Replacement, page 22-177
Test, page 22-141
Input Test, page 22-131
Test/Replacement, page 22-146
Test/Replacement, page 22-142
08/08/21 14:25:04 61SNR030_220_0114
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Security Alarm System
22-114Keyless/Power Door Locks/Security System
System Description
The security alarm system is armed automatically after the doors, hood, and trunk are closed and locked. For the
system to arm, the ignition switch must be to LOCK (0), the key must be removed from the ignition switch, and the
MICU must receive signals that the doors, hood, and trunk are closed and locked. The alarm can be disarmed at any
time by unlocking the driver’s door with the key or pressing the UNLOCK button on the transmitter.
When everything is closed and locked, the only i
nputs that are grounded, and have 0 V, are the driver’s door lock knob
switch (LOCK position), and the audio unit or navigation unit (if equipped). In other words, all of the other switches are
open, and have about 10 to 12 V, including the key cylinder switches. The security indicator in the gauge control
module (speedo) begins to flash immediately after the vehicle is completely closed and locked, and 15 seconds later,
the security system arms. If the security indicator does not flash, the system is not arming. A beep sounds and parking
lights flash to confirm the security alarm system is armed if the LOCK button is pressed a second time within
5 seconds.
If one of the switches is misadjusted or shorted internally, or there is a short in the circuit, the security system will not
arm. As long as the control unit continues to receive a ground signal (0 V), it senses that the vehicle is not closed and
locked, and the system will not arm. A switch that is slightly misadjusted can cause the alarm to sound for no apparent
reason. In this case, a significant change in outside air temperature, the vibration of a passing truck, or someone
bumping into the vehicle could cause the alarm to sound. There is no glass breakage or motion detector feature.
If anything is opened or improperly unlocked after the system is armed, the control unit receives a ground signal from
that switch, and the 10 to 12 V reference drops to 0 V. If the audio unit or navigation unit (if equipped) is disconnected,
the input loses its ground, and the input voltage goes to 10 to 12 V. The system sounds the alarm when any of these
occur:
 A door or the trunk is forced open.
 A door is unlocked without using the key or the transmitter.
 The hood is opened.
 The audio unit or navigation unit (if equipped) is disconnected.
 The transmitter PANIC button is pressed.
When the system sounds the alarm, the horn sounds and the exterior lights flash for 2 minutes. The alarm can be
stopped at any time by unlocking the driver’s door with the key or by pressing any button on the transmitter.
08/08/21 14:25:08 61SNR030_220_0116
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Panic Mode
Keyless Entry System
22-115
The panic mode sounds the alarm in order to attract attention. When the PANIC button on the transmitter is pressed
and held for 2 seconds, the horn sounds and the exterior lights flash for about 20 seconds.
The panic mode can be cancelled at anytime by pressing any button on the transmitter or by turning the ignition
switch to ON (II). The panic mode will not function if the ignition switch is to ON (II).
The keyless entry system is integrated with the multiplex integrated control system. The multiplex integrated control
unit (MICU) receives LOCK, UNLOCK and PANIC signals from the immobilizer-keyless control unit (keyless receiver).
The keyless entry system allows you to lock and unlock the vehicle with the transmitter.
When the switch for the ceiling light is in the center (DOOR) position, it will come on when the UNLOCK button is
pressed. If a door is not opened, the light will go off in about 30 seconds, and the doors will relock. If the doors are
locked with the transmitter within 30 seconds, the light will go off immediately.
08/08/21 14:25:09 61SNR030_220_0117
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DYNOMITE -2009-

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22-116Keyless/Power Door Locks/Security System
Circuit Diagram
Q1
G2
G21 D2
ORN
GRN
BRN
G503 G501 G504 G504 IG1 HOT in ON (II) and START (III)
8 T22
LT BLU
BLK10LOCK
LOCK
YEL
T30
1
6
PUR
T29
BLK 2
11
BLK
T27
GRY
19 17 T28
BLU
LOCK LOCK
KEY
MICU No. 25 (20 A)
ORN
IG1
5
BLK
No. 23 (10 A)
T24
LT GRN 6
UNDER-DASH FUSE/RELAY BOX
WHTT23
7
LOCK
PNK
T32
9
8
BRN
T31 No. 10 (7.5 A)
BLU
IGNITION SWITCH
IG1
BAT
BLU
WHT
No. 4 (P/W) (40 A)
BATTERY
No. 1 (BAT) (100 A) No. 2 (IG) (50 A)
UNDER-HOOD FUSE/RELAY BOX
UN-
LOCKUN-
LOCK
UN-
LOCK
DRIVER’S
DOOR LOCK
SWITCH DRIVER’S
DOOR KEY
CYLINDER
SWITCHDRIVER’S
DOOR LOCK
KNOB SWITCH
DOOR
LOCK
KNOB
DOOR
LOCK
KNOB
FRONT
PASSENGER’S
DOOR LOCK
KNOB SWITCH
FRONT
PASSENGER’S
DOOR LOCK
SWITCH
UN-
LOCK
UN-
LOCK
LIGHT
(LED)
LIGHT
(LED)
H1
K2
D4
BBACKUPWHT
08/08/21 14:25:09 61SNR030_220_0118
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