fuse box diagram ACURA CSX 2006 Service Owner's Manual


19-116VSA System Components
Circuit Diagram (cont’d)
BRAKE PEDAL POSITION
SWITCH 4P CONNECTOR
PARKING BRAKE SWITCH
1P CONNECTOR
DATA LINK CONNECTOR (DLC) VSA OFF SWITCH
5P CONNECTOR
YAW RATE-LATERAL
ACCELERATION SENSOR
5P CONNECTOR
STEERING ANGLE SENSOR
5P CONNECTOR
BRAKE FLUID LEVEL SWITCH
2P CONNECTOR
UNDER-HOOD
FUSE/RELAY BOX
CONNECTOR C (2P)
WHEEL SPEED SENSOR
2P CONNECTOR
ECM/PCM CONNECTOR A (44P)
GAUGE CONTROL MODULE (TACH) 36P CONNECTOR
VSA MODULATOR-CONTROL UNIT 37P CONNECTOR UNDER-DASH FUSE/RELAY BOX CONNECTOR F (34P)
UNDER-DASH FUSE/RELAY BOX CONNECTOR E (42P)
Wire side of female terminals
Terminal side of female terminals
08/08/21 15:04:57 61SNR030_190_0116
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21-26Climate Control
Circuit Diagram
PNK
RED/BLK
12
1 2
Q6
1 2
GRN/REDRED
IG2 HOT in ON (II)
CAN HI
CAN LO
FAN HI ACC L
FAN LO A14
A4
A5 13
A/C COMPRESSOR
2
RED/WHT
BLU
F26 MICU
1
19
21
A37
A36
BLK
A9 A33 A16 A19 PNK
WHT RED
1
23
RED
LT GRN
5V
BLK
VCC6
ACPD
TW2 GRN12
SG BLK
No. 15
(7.5 A)
(20 A) No. 6 A/C DIODE A
GRY RED
WHT
LT GRN
BRN
42 3 5
1 IG2
BAT
ORNNo. 36 (10 A)
BRN
BLK RED
BLU
2
1
G301 ECM/PCM
BATTERY
No. 1 (BAT) (100 A)
24
2
3
PUR
13
41 No. 9 (40 A)
No. 2 (IG) (50 A)
1
3
42
WHT
BLK
G301
No.20(7.5A)
1
3
2
4
PUR
UNDER-HOOD FUSE/RELAY BOX IGNITION SWITCH
UNDER-DASH
FUSE/RELAY BOX
RADIATOR
FAN RELAY
FAN CONTROL
RELAY
A/C
CONDENSER
FAN RELAY A/C
COMPRESSOR
CLUTCH RELAY
BLOWER
MOTOR
RELAY
RADIATOR
FAN
MOTOR
PGM-FI
SUB
RELAY
A/C
CONDENSER
FAN
MOTOR
ENGINE
COOLANT
TEMPERATURE
(ECT) SENSOR 2A/C PRESSURE
SENSOR
GAUGE
CONTROL
MODULE
(TACH)
A/C
COMPRESSOR
CLUTCH
UNDER-DASH
FUSE/RELAY
BOX
THERMAL
PROTECTOR
A/C
DIODE B
H1 C3 Q16
G12
D1
F11 F14 F12 F2 F7 F20 E8 F1 J2 No. 7 (20 A)
08/08/21 14:41:03 61SNR030_210_0027
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Body Electrical
Body Electrical..................................
..................................
Relay and Control Unit
Locations . 22-7
................
Connectors and Harnesses . 22-13
........................
........................
Fuse/Relay Boxes . 22-58
......................
......................
Power Distribution . 22-60
....................
....................
Ground Distribution . 22-64
Under-hood Fuse/Relay Box
Under-dash Fuse/Relay Box
Battery
Relays
Ignition Switch
Multiplex Integrated Control System Keyless/Power Door Locks/Security
System
Horns
Exterior Lights
Turn Signal/Hazard Warning Lights
Interior Lights.............................................. .....
..............................................
.....
Special Tools . 22-2
General Troubleshooting Information . 22-3
.......................... ..........................
Removal and Installation . 22-65
..........................
..........................
Removal and Installation . 22-66
.......................................................................................... .............
................................................
.......................................... .............
Battery Test
. 22-67
Battery Terminal Disconnection and Reconnection . 22-68
Battery Removal and Installation . 22-69
.......................................
.......................................
Power Relay Test . 22-70
............................................................. ..............................................
.............................................................
..............................................
Test
. 22-72
Replacement . 22-72
...................... .....
......................
...................................
.........................
..........................
.......................... .........................
............
................
.......................................... ................................
......................................... ......................
.....
......................
...................................
.........................
..........................
.......................... .........................
............
................
.......................................... ................................
.........................................
Component Location Index
. 22-73
General Troubleshooting Information . 22-74
DTC Troubleshooting Index . 22-77
System Description . 22-80
Troubleshooting-B-CAN System Diagnosis Test Mode A . 22-93
Troubleshooting-B-CAN System Diagnosis Test Mode B . 22-94
Troubleshooting-B-CAN System Diagnosis Test Mode C . 22-95
Troubleshooting-B-CAN System Diagnosis Test Mode D . 22-96
Troubleshooting-B-CAN System Diagnosis Test Mode 1 and
Test Mode 2 (Without the HDS) . 22-97
Sleep and Wake-up Mode Test . 22-99
Circuit Diagram . 22-100
DTC Troubleshooting . 22-102
MICU Input Test . 22-109 ......................
...................................
.......................................... ......................................................
.............................
......................................... ................................................
............................... ...............................
....................................... .................
......................
...................................
.......................................... ......................................................
.............................
......................................... ................................................
............................... ...............................
....................................... .................
Component Location Index
. 22-112
System Description . 22-114
Circuit Diagram . 22-116
DTC Troubleshooting . 22-120
Symptom Troubleshooting . 22-126
Tripped Sensor History . 22-130
MICU Input Test . 22-131
Door Lock Actuator Test . 22-137
Door Lock Knob Switch Test . 22-138
Door Lock Switch Test . 22-139
Door Key Cylinder Switch Test . 22-140
Trunk Lid Release Actuator Test . 22-141
Hood Switch Test . 22-141
Transmitter Test/Replacement . 22-142
......................
.......................................... ............................
....................................... ......................
.......................................... ............................
.......................................
Component Location Index
. 22-145
Circuit Diagram . 22-146
Horn Test/Replacement . 22-146
Horn Switch Test . 22-147
......................
.......................................... ................................
.........................................
........................................... ..............................
............................... ........
............................... .............................
.............................
................................
..................................... ............................... ........................................
.............
......................
.......................................... ................................
.........................................
........................................... ..............................
............................... ........
............................... .............................
.............................
................................
..................................... ............................... ........................................
.............
Component Location Index
. 22-148
Circuit Diagram . 22-150
DTC Troubleshooting . 22-157
MICU Input Test . 22-163
Combination Light Switch Test/ Replacement . 22-166
HID Bulb Replacement . 22-168
HID Unit Replacement . 22-169
HID Lamp System Troubleshooting . 22-170
Headlight Adjustment . 22-173
Headlight Replacement . 22-174
Fog Light Replacement . 22-175
Fog Light Adjustment . 22-176
Bulb Replacement . 22-177
Taillight Replacement . 22-179
Inner Taillight Replacement . 22-179
License Plate Light Replacement . 22-180
High Mount Brake Light Replacement . 22-180
Brake Pedal Position Switch Test . 22-181
......................
.......................................... ................................
.........................................
.................................. .......
......................
.......................................... ................................
.........................................
.................................. .......
Component Location Index
. 22-182
Circuit Diagram . 22-184
DTC Troubleshooting . 22-186
MICU Input Test . 22-188
Hazard Warning Switch Test/Replacement . 22-192
Side Turn Signal Light Replacement . 22-192
......................
..........................................
........................................... ...............
.......................... ............
.................... ................
...................... .............
......................
..........................................
........................................... ...............
.......................... ............
.................... ................
...................... .............
Component Location Index
. 22-193
Circuit Diagram . 22-194
Front Individual Map Light Test/ Replacement . 22-196
Ceiling Light Test/Replacement . 22-197
Trunk Light Replacement . 22-197
Ambient Light Test/Replacement . 22-198
Courtesy Light Replacement . 22-198
Glove Box Light Test/Replacement . 22-199
Vanity Mirror Light Test/Replacement . 22-199
Interior Light Switch Test/Replacement . 22-200
Trunk Lid Latch Switch Test . 22-200
Footwell Light Test/Replacement . 22-201
08/08/21 14:22:03 61SNR030_220_0002
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MICU Control Functions Index
SystemFunction
22-82Multiplex Integrated Control System
System Description (cont’d)
The MICU (built into the under-dash fuse/relay box) is one of the B-CAN components. The MICU controls many
systems related to the body controller area and security system, and also works as a gateway to the diagnose the
other B-CAN connected ECUs with the HDS.
Refer to the each system circuit diagram in detail.
Multiplex Control Sends the switch input signal information to the MICU and outputs the information. The MICU controls the ECUs electric load and communication based upon the information
received the B-CAN.
On-Board Diagnosis The MICU has a gateway function which sends the results of the MICU internal diagnosis and the B-CAN connected ECUs diagnosis to the HDS.
Self-Diagnosis Test mode 1 diagnoses the communication line between the MICU and B-CAN connected unit. Test mode 2 checks the switch inputs connected to the MICU.
Interior Light(s) The MICU controls the interior lights ON, OFF and dimming based upon the information of the related switches and/or the B-CAN related information.
Sleep Function The MICU has a sleep function, which it enters during the power down mode.
The MICU also controls the function of these circuits:  Entry lights control (map lights and ceiling light)
 Exterior lights control (including the daytime running lights control)
Horn
 Interlock system
 Key-in reminder
 Keyless entry
 Lights-on reminder
 Power door locks
 Power window key-off timer
 Seat belt reminder
 Security alarm
 Turn signal/hazard flasher
 Wiper/washer
08/08/21 14:24:08 61SNR030_220_0084
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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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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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Î
22-118Keyless/Power Door Locks/Security System
Circuit Diagram (cont’d)
 
G18
HORN
LT GRN
G7
G16
T26
PNK
BRN
G602BLK8
10
5
7
BLK
G602
BRN
GRY T25
BLU/BLK GRN
F27
5
1
BLK
G101
E2
GRY
*4
E17
BRN
*3
E3
LT GRN
*2
*1
GRN
E37
G504 BLK
2 1
PNK
R6
PNK R16 WHT
WHT
MICU No. 4 (H/L) (50 A)
(UNDER-HOOD
FUSE/RELAY BOX)
PARKING
LIGHTS LEFT/RIGHT
HEADLIGHTS
(LOW BEAM)
UNDER-DASH
FUSE/RELAY BOX No. 12 (15 A) FUSE
(UNDER-HOOD
FUSE/RELAY BOX)
IMMOBILIZER-
KEYLESS
CONTROL UNIT IGNITION
KEY
SWITCH
(Closed:
Key inserted) TRANSMISSION
RANGE SWITCH
(Closed:
In position P)
UN-
LOCKLEFT
REAR
DOOR
LOCK
KNOB
SWITCH RIGHT
REAR
DOOR
LOCK
KNOB
SWITCH
UN-
LOCK
SIDE
MARKER
LIGHTS
(A/T)
1111
1
No. 19
(15 A)No. 15
(7.5 A) No. 21
(30 A)*5
(20 A)*6No. 17
(15 A)*5
(10 A)*6No. 16
(15 A)*5
(10 A)*6
08/08/21 14:25:10 61SNR030_220_0120
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22-14622-146 Horns
Circuit Diagram
Horn Test/Replacement
F31 G16
G7
Q3
HORN
* : Ground through steering column. * MICU
ORN LT GRN (15 A) No. 12
WHT
WHT BATTERY
UNDER-DASH
FUSE/RELAY BOX
BRAKE
LIGHTS
CABLE
REEL
HORN
SWITCH UNDER-HOOD
FUSE/RELAY BOX
D8
10 3
11A B
AB
1. Remove the front bumper (see page 20-146).
2. Disconnect the 1P connector (A) from the horn (B).
3. Test the horn by connecting battery power to the
terminal (A) and grounding the bracket (B). The
horn should sound.
4. If it fails to sound, replace it.
08/08/21 14:26:09 61SNR030_220_0148
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With HID
22-150Exterior Lights
Circuit Diagram
BATTERY
No. 1 (BAT) (100 A)
UNDER-HOOD FUSE/RELAY BOX
No. 4 (H/L) (50 A)
ORN No. 2 (IG) (50 A)
WHT
IGNITION SWITCH
BATIG2
WHT
ORN
IG2 HOT in ON (II)
G18 28 21
Q6
PNK
GAUGE CONTROL MODULE (TACH)
*1 *2 *3
LT GRNORN B-CAN
T34
G501 BLK
LO (35 W)
HID UNIT HID UNIT
LO (35 W)
G2
BLK
BLK
BLK
BLK
BLK BLK SG
E6
G602 G601 E33
F20
PG
BLK
G401 BBACKUP
MICU
G301 G201 F22
F4
G15
G17
2
2
11
1 2
1 2
G201
G301 GRN WHT
PUR
UNDER-DASH FUSE/RELAY BOX
PNK PARKING
BRAKE SWITCH
(Closed:
Lever pulled)B-CAN
TRANSCEIVER
MAIN
CIRCUIT
LEFT
HEADLIGHT RIGHT
HEADLIGHT
H1
K1
D4 C3
1
HEADLIGHT
CIRCUIT
HEADLIGHT
CIRCUIT
No. 37
(7.5 A)
No. 18
(20 A)
No. 21
(30 A)
No. 23
(10 A)
No. 17
(15 A)No. 13
(10 A) No. 16
(15 A)
No. 12
(10 A)
HIGH
(60 W) HIGH
(60 W)
08/08/21 14:26:53 61SNR030_220_0152
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Without HID
22-152Exterior Lights
Circuit Diagram (cont’d)
G18
G501 BLKSG
T34 E6
G602BLK *3
*2
*1
IG2 HOT in ON (II) GAUGE CONTROL MODULE (TACH)
B-CANPNK
Q6 21
28
ORN
LT GRN
ORN
WHT
IG2
BAT
IGNITION SWITCH
No. 2 (IG) (50 A)
G2
BLK
BLK
BLK
BLK
BLK WHT
G601 E33
F20
PG
BLK
G401 BBACKUP
MICU ORNNo. 4 (H/L) (50 A)
G301 G201 F22
F4
G15
G17
2
2
11
1 2
1
2
G201
G301 GRN WHT
PUR
UNDER-DASH FUSE/RELAY BOX
UNDER-HOOD FUSE/RELAY BOX
PNK
No. 1 (BAT) (100 A)
BATTERY
RIGHT
HEADLIGHT
LEFT
HEADLIGHT MAIN
CIRCUIT
B-CAN
TRANSCEIVER
PARKING
BRAKE SWITCH
(Closed:
Lever pulled)
H1
K1
D4
1
C3
HEADLIGHT
CIRCUIT HEADLIGHT
CIRCUIT
No. 23
(10 A)
No. 21
(20 A) No. 18
(20 A)No. 37
(7.5 A)
No. 17
(10 A) No. 13
(10 A) No. 16
(10 A)No. 12
(10 A)
LOW
(51 W) HIGH
(60 W)
LOW
(51 W)HIGH
(60 W)
08/08/21 14:26:54 61SNR030_220_0154
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