fuse box ACURA CSX 2006 Service Repair Manual

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22-311
Circuit Diagram
IG2 HOT in ON (II) G12C3
CLIMATE CONTROL UNIT LT GRN
BLK
G603 2 BRN
LT GRN LT GRN
BLK No. 2 (IG) (50 A)
G801
1
RED RED UNDER-HOOD FUSE/RELAY BOX
G504BLK
RED
BRN
No. 8
(30 A)
No. 36
(HAC)
(10 A)
ORN
IGNITION SWITCH
IG2
BAT
WHT
BATTERY
No. 1 (BAT) (100 A)
UNDER-DASH
FUSE/RELAY
BOX
REAR
WINDOW
DEFOGGER
RELAY
REAR WINDOW
DEFOGGER
SWITCH
INDICATOR
(Rear window defogger
switch and defogger
timer circuit built into
the climate control unit.)
NOISE
CONDENSER REAR
WINDOW
DEFOGGER POWER
MIRROR
DEFOGGER
RELAY
H1
D1
J4 F17 F8
2 3
5
1
1 MICU
Q16
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22-312Rear Window Defogger
Function Test
A
B
About 2.0 V About 6 V About 11 V
About 8.5 V
About 4.2 V
NOTE:
 Be careful not to scratch or damage the defogger wires with the tester probe.
 Before testing, check the No. 8 (30 A) fuse in the under-hood fuse/relay box and the No. 36 (10 A) fuse
in the under-dash fuse/relay box.
1. Measure the voltage between the positive terminal (A) and body ground with the ignition switch turned
to ON (II) and the defogger switch ON.
There should be battery voltage.
 If there is no voltage, check for: – Faulty rear window defogger relay.
– Faulty climate control unit.
– An open in the RED wire to the positive terminal.
 If there is voltage, go to step 2. 2. Disconnect the negative terminal (B) from the rear
window defogger.
3. Check for continuity between the negative terminal and body ground.
If there is no continuity, check for an open in the
wire or poor ground (G 801). If there is continuity,
go to step 4.
4. Reconnect the negative terminal to the rear window defogger.
5. Turn the ignition switch to ON (II) and the rear window defogger switch ON.
6. Touch the voltmeter positive probe to each point on each defogger wire, and the negative probe to
the negative terminal.
 If the voltage is as specified, the defogger wire up to that point is OK.
 If the voltage is not as specified, repair the defogger wire.
– If it is more than specified at one of the points, there is a break in the negative half of the wire.
– If it is less than specified at one of the points, there is a break in the positive half of the wire.
08/08/21 14:36:55 61SNR030_220_0314
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22-316Immobilizer System
Circuit Diagram
LT GRN
PNK R9
F8 LT GRN
28
21
PNK
F24 G2D2
Q1
R12
PNK R6 R16 PNK
BRN/YEL C40
BRN/YEL LG1
LG2
BRN/YEL C44 B-CAN
Q6
G504 BLK
2 1
BRN/YEL IG1
2
YEL MICU
B-CAN
VBU
K-LINE
IGKEYSW
LG
7
BLK
BRN
IG1 C36
BLK/GRN
5
LT BLU
WHT
A44
B1
B36 PG2
PG1
BLK
G101 PNK
BRN
PNK
1
No. 2 (15 A)
WHT
KEY
IMOCD
ECM/PCM UNDER-DASH FUSE/RELAY BOX
ORN IG1
BAT
BLU
No. 23 (10 A)
UNDER-HOOD FUSE/RELAY BOX
No. 2 (IG) (50 A)
BATTERY IGNITION SWITCH
No. 1 (BAT) (100 A)
IMMOBILIZER-KEYLESS CONTROL UNIT6
3 4
PGM-FI
MAIN RELAY 2
(FUEL PUMP)
DATA LINK
CONNECTOR
IGNITION
KEY SWITCH
(Closed: Key inserted)
IG1 HOT in ON (II)
and START (III)
GAUGE CONTROL
MODULE (TACH)
UNDER-DASH
FUSE/RELAY BOX IMMOBILIZER
INDICATOR
(LED)
PARKING
BRAKE
SWITCH
(Closed:
Lever pulled)
UNDER-DASH
FUSE/RELAY
BOX
D4
H1
1: CAN line
: Other communication line
*1: ’06 07 models
*2: ’07 09 models
*3: ’08 09 models
ORN
IMOES UNIT
(Built into the MICU) MICU
BLK*2
IMOCD
BLK/RED*1 BLK*3
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DTC B1905:
YES
NO
YES
NO
22-317
DTC Troubleshooting
Immobilizer-Keyless Control Unit
Lost Communication with MICU (DRLOCKSW
Message)
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 6 seconds or more.
4. Check for DTCs with the HDS.
Go to step 5.
Intermittent failure, the system is OK at this
time. Check for loose or poor connections at the
immobilizer-keyless control unit 7P c onnector, and
the under-dash fuse/relay box connector Q (16P).
5. Check for DTCs with the HDS.
Faulty MICU; replace the under-dash fuse/
relay box (see page 22-66).
Replace the immobilizer-keyless control unit
(see page 22-332).
Is DTC B1905 indicated?
Is DT C B1160 also indicated with DT C B1905?
08/08/21 14:36:58 61SNR030_220_0319
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DTC B1925:
YES
NO YES
NO
YES
NO
22-319
IGNITION KEY SWITCH 6P CONNECTOR
GND
IG KEY SW
IGNITION KEY SWITCH 6P CONNECTOR GND
IG KEY SW
Ignition Key Switch Signal Error
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).
 If the vehicle is equipped with an ACURA ACCESSORY remote starter, this DTC is normal no
further diagnosis is necessary.
1. Clear the DTCs with the HDS.
2. Turn the ignition switch to LOCK (0) and remove the ignition key.
3. Insert the ignition key into the ignition switch, and turn the ignition switch to ON (II).
4. Check for DTCs with the HDS.
Go to step 5.
Intermittent failure, the system is OK at this
time. Check for loose or poor connections at the
immobilizer-keyless control unit 7P c onnector,
under-dash fuse/relay box 20P connector R, and at
the ignition key switch 6P connector.
5. Turn the ignition switch to LOCK (0) and remove the ignition key.
6. Disconnect the ignition key switch 6P connector. 7. At the ignition key switch side, check for continuity
between ignition key switch 6P connector terminals
No. 1 and No. 2.
Faulty ignition key switch or short to ground,
replace the steering lock assembly (see page 17-14).
Go to step 8.
8. Insert the ignition key into the ignition switch.
9. At the ignition key switch side, check for continuity between ignition key switch 6P connector terminals
No. 1 and No. 2.
Go to step 10.
Faulty ignition key switch, replace the
steering lock assembly (see page 17-14).
(cont’d)
Terminal side of male terminals
Terminal side of male terminals
Is DTC B1925 indicated? Is there continuity?
Is there continuity?
08/08/21 14:36:59 61SNR030_220_0321
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YES
NO YES
NO
22-320Immobilizer System
DTC Troubleshooting (cont’d)
IGNITION KEY SWITCH 6P CONNECTOR
IMMOBILIZER-KEYLESS CONTROL UNIT 7P CONNECTOR IG KEY SW (PNK)
IG KEY SW (PNK) IMMOBILIZER-KEYLESS CONTROL UNIT 7P CONNECTOR
IG KEY SW (PNK)
10. Disconnect the immobilizer-keyless control unit 7Pconnector.
11. Check for continuity between immobilizer-keyless control unit 7P connector terminal No. 6 and
ignition key switch 6P connector terminal No. 1.
Go to step 12.
Repair an open in the wire and check under-
dash fuse/relay box 20P connector R. 12. Check for continuity between immobilizer-keyless
control unit 7P connector terminal No. 6 and body
ground.
Repair a short to ground in the wire or
substitute a known-good under-dash fuse/relay box,
and recheck. If the symptom/indication goes away,
replace under-dash fuse/relay box.
Replace the immobilizer-keyless control unit
(see page 22-332).
Wire side of female terminals
Wire side of female terminals Wire side of female terminals
Is there continuity?
Is there continuity?
08/08/21 14:36:59 61SNR030_220_0322
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Immobilizer indicator blinks
YES
NO
YES
NO YES
NO
YES
NO
22-324Immobilizer System
Symptom Troubleshooting (cont’d)
IMMOBILIZER-KEYLESS CONTROL UNIT 7P CONNECTOR
IG1 (YEL)
IMMOBILIZER-KEYLESS CONTROL UNIT 7P CONNECTOR LG (BLK)
NOTE: Before troubleshooting, check the items listed in
‘‘General Check before Troubleshooting’’.
1. Turn the ignition switch to LOCK (0).
2. Connect the HDS, then turn the ignition switch to ON (II).
3. Enter the IMMOBILIZER, then select the IMMOBILIZER SETUP.
4. Select the SYSTEM CHECK.
Troubleshoot the immob ilizer system
according to the result of the SYSTEM CHECK
(see page 22-326).
Go to step 5.
5. Turn the ignition switch to LOCK (0).
6. Enter the vehicle, and remove the ignition key from the ignition switch, then close the all doors.
7. Operate the keyless transmitter LOCK and UNLOCK several times in the vehicle.
Go to step 8.
Check for a poor ground (G 101) and/or an
open in the wire between immobilizer-keyless
control unit 7P connector terminal No. 7 and body
ground (G 101).
8. Turn the ignition switch to ON (II). 9. Measure the voltage between immobilizer-keyless
control unit 7P connector terminal No. 2 and body
ground.
Go to step 10.
Repair open in the YEL wire between the
under-dash fuse/relay box and the immob ilizer-
keyless control unit.
10. Measure the voltage between immobilizer-keyless control unit 7P connector terminal No. 7 and body
ground.
Repair poor connection or open between
immobilizer-keyless control unit 7P c onnector
terminal No. 7 and G101.
Replace the immobilizer-keyless control unit
(see page 22-332).
Wire side of female terminals
Wire side of female terminalsIs the SY ST EM CHECK indicated?
Do t he d oor l ock act uat or s w or k nor mal l y ? Is there battery voltage?
Is t her e 0.5 V or mor e?
08/08/21 14:37:00 61SNR030_220_0326
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22-330Immobilizer System
Immobilizer-keyless Control Unit Input Test
WHT
BLK
PNK
YEL AB
NOTE: Before testing the immobilizer system, troubleshoot the system using B-CAN System Diagnosis Test Mode A
(see page 22-93) and check the No. 10 (7.5 A) and No. 38 (30 A) fuses in the under-dash fuse/relay box.
1. Remove the driver’s dashboard lower cover (see page 20- 102).
2. Remove the steering column covers (see page 17-9).
3. Disconnect the 7P connector (A) from the immob ilizer-keyless control unit (B).
4. Inspect the connector and socket terminals to be sure they are all making good contact.  If the terminals are bent, loose or corroded, repair them as necessary, and recheck the system.
 IftheterminalslookOK,gotostep5.
Wire side of female terminals
08/08/21 14:37:09 61SNR030_220_0332
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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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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
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