2006 ACURA CSX fuse box

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YES
NO
YES
NO
YES
NO
YES
NO
22-160Exterior Lights
DTC Troubleshooting (cont’d)
UNDER-DASH FUSE/RELAY BOX CONNECTOR S (20P)
H/L OFF
SW (ORN)
SMALL LT SW
(GRY)
H/L ON
SW
(PNK) COMBINATION LIGHT SWITCH 12P CONNECTOR
H/L OFF
SW (ORN) COMBI GND (BLK)
SMALL
LT SW
(GRY)
H/L ON
SW (PNK)
UNDER-DASH FUSE/RELAY BOX CONNECTOR S (20P) COMBI GND (BLK)
H/L OFF
SW (ORN)
SMALL LT SW (GRY)
H/L ON SW (PNK)
12. Turn the ignition switch to LOCK (0).
13. Disconnect under-dash fuse/relay box connector S
(20P).
14. Check for continuity between body ground and under-dash fuse/relay box connector S (20P)
terminals No. 1, No. 11, and No. 13 individually.
Repair a short to ground in the wire.
Faulty MICU; replace the under-dash fuse/
relay box (see page 22-66).
15. Turn the ignition switch to LOCK (0).
16. Do the combination light switch test (see page 22-166).
Go to step 17.
Replace the combination light switch.
17. Disconnect under-dash fuse/relay box connector S (20P). 18. Check for continuity between under-dash fuse/relay
box connector S (20P) terminals and the
combination light switch 12P connector terminals
as shown:
Under-dash fuse/
relay box connector S (20P) Combination light
switch 12P connector
19
11 10
13 11 512
Go to step 19.
Repair an open in the wire.
19. Check for continuity between under-dash fuse/relay box connector S (20P) terminals as shown:
From terminal To terminal 1 11, 12, 13, 16
13 11, 12, 16
Repair a short between the wires.
Faulty MICU; replace the under-dash fuse/
relay box (see page 22-66).
Wire side of female terminals Wire side of female terminals
Wire side of female terminals
Is there continuity? I s t he combi nat i on l i ght sw i t ch OK ? Is there continuity?
Is there continuity?
08/08/21 14:26:57 61SNR030_220_0162
ProCarManuals.com
DYNOMITE -2009-

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DTC B1279:
YES
NO
When the passing switch is operated
When the headlight switch is turned ON, and the
dimmer switch changed from low beam to high
beam
YES
NO When the combination light switch is turned OFF
YES
NO
YES
NO
22-161
UNDER-DASH FUSE/RELAY BOX CONNECTOR S (20P)
DIMMER SW
(LT BLU)
H/L ON
SW (PNK)
PASSING
SW (RED)
Headlight Switch DIMMER
Position Circuit Malfunction
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. Turn the combination light (headlight) switch ON.
4. Change the dimmer switch from low beam to high beam.
5. Turn the combination light switch OFF, and then to the passing position, and wait for at least 6 seconds.
6. Check for DTCs with the HDS.
Go to step 7.
Intermittent failure, the system is OK at this
time. Check for loose or poor connections.
7. Select LIGHTING from the BODY ELECTRICAL system select menu, then enter DATA LIST.
8. Check each combination light switch position value with the DATA LIST menu.
Data List Value
Headlight Switch (PASSING) ON
Headlight Switch (High beam) OFF
Data List Value
Headlight Switch (PASSING) OFF
Headlight Switch (High beam) ON
Headlight Switch (HEADLIGHT) ON
Faulty MICU; replace the under-dash fuse/
relay box (see page 22-66).
Go to step 9. 9. Turn the ignition switch to LOCK (0).
10. Disconnect the combination light switch 12P connector.
11. Turn the ignition switch to ON (II).
12. Select LIGHTING from the BODY ELECTRICAL system select menu, then enter DATA LIST.
13. Check each combination light switch position value with the DATA LIST menu.
Data List Value
Headlight Switch (PASSING) OFF
Headlight Switch (High beam) OFF
Headlight Switch (HEADLIGHT) OFF
Go to step 17.
Go to step 14.
14. Turn the ignition switch to LOCK (0).
15. Disconnect under-dash fuse/relay box connector S (20P).
16. Check for continuity between body ground and under-dash fuse/relay box connector S (20P)
terminals No. 11, No. 12, and No. 16 individually.
Repair a short to ground in the wire.
Faulty MICU; replace the under-dash fuse/
relay box (see page 22-66).
(cont’d)
Wire side of female terminals
Is DTC B1279 indicated?
Are all data list values correct? Are all data list values indicated OFF?
Is there continuity?
08/08/22 16:38:06 61SNR030_220_0163
ProCarManuals.com
DYNOMITE -2009-

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YES
NO
YES
NO YES
NO
22-162
Exterior Lights
DTC Troubleshooting (cont’d)
COMBINATION LIGHT SWITCH 12P CONNECTOR
COMBI GND (BLK)
H/L ON
SW (PNK) UNDER-DASH FUSE/RELAY BOX CONNECTOR S (20P)
COMBI GND
(BLK)
H/L ON SW (PNK) PASSING
SW (RED)
PASSING
SW (RED)
DIMMER SW (LT BLU) DIMMER SW
(LT BLU)
17. Turn the ignition switch to LOCK (0).
18. Do the combination light switch test (see page
22-166).
Go to step 19.
Replace the combination light switch.
19. Disconnect under-dash fuse/relay box connector S (20P).
20. Check for continuity between under-dash fuse/relay box connector S (20P) terminals and the
combination light switch 12P connector terminals
as shown:
Under-dash fuse/
relay box connector S (20P) Combination light
switch 12P connector
512
11 10
12 6
16 4
Go to step 21.
Repair an open in the wire. 21. Check for continuity between under-dash fuse/relay
box connector S (20P) terminals as shown:
From terminal To terminal 12 1, 11, 13, 16
16 1, 11, 13
Repair a short between the wires.
Faulty MICU; replace the under-dash fuse/
relay box (see page 22-66).
Wire side of female terminals
Wire side of female terminals
I s t he combi nat i on l i ght sw i t ch OK ?
Is there continuity? Is there continuity?
08/08/21 14:26:58 61SNR030_220_0164
ProCarManuals.com
DYNOMITE -2009-

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22-163
MICU Input Test
UNDER-DASH FUSE/RELAY BOX CONNECTOR E (42P)
BLK RED
GRN WHT
ORN
PNKPUR
WHT
GRY LT BLU UNDER-DASH FUSE/RELAY BOX CONNECTOR F (34P)
UNDER-DASH FUSE/RELAY BOX CONNECTOR G (21P)
UNDER-DASH FUSE/RELAY BOX CONNECTOR S (20P) UNDER-DASH FUSE/RELAY BOX CONNECTOR T (34P) BLK
BLK BLK
RED
RED
RED ORN
PNK BLK
NOTE:
 The MICU turns on the headlights (high beams) in a dimming mode for the Daytime Running Lights under the following conditions:
– With the ignition switch turned to ON (II)
– The headlight switch OFF
– The parking brake is released (parking brake switch OFF)
 The DRL indicator will come on when one of the headlight (high beams) bulbs is blown, or if the high beam wiring has an open circuit with the daytime running lights ON.
 If the vehicle is equipped with an optional remote control engine start system, the daytime running lights will not function when started with the remote start.
1. Before testing the lighting system, troubleshoot the system using B-CAN System Diagnosis Test Mode A (see page 22-93).
2. Check the No. 12 (10 A), No. 13 (10 A), No. 15 (7.5 A), No. 16 (15 A) , (10 A) , No. 17 (15 A) , (10 A) , No. 18 (20 A), No. 19 (15 A), No. 21 (30 A) , (20 A) , and No. 37 (7.5 A) fuses in the under-dash fuse/relay box. If any fuse
is blown, replace it and go to step 3.
1: With HID
2: Without HID
3. Disconnect under-dash fuse/relay box connectors E, F, G, S, and T. NOTE: All connector views are shown from wire side of female terminals.
(cont’d)
1212
12
08/08/21 14:26:58 61SNR030_220_0165
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Cavity WireTest condition Test: Desired result Possible cause if desired result is not
obtained
22-165
6. Reconnect the connectors to the under-dash fuse/relay box, and do these input tests at the following connectors.
 If any test indicates a problem, find and correct the cause, then recheck the system.
 If all the input tests prove OK, the MICU must be faulty; replace the under-dash fuse/relay box.


































G2 ORN Under all conditions Measure the voltage between
terminal G2 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
G18 WHT Under all conditions Measure the voltage between terminal G18 and body ground:
There should be battery voltage.Blown No. 4 (50 A) fuse in the under-
hood fuse/relay box
An open in the wire
E6 BLK Under all conditions Measure the voltage to ground: There should be less than 0.5 V.Poor ground (G602)
An open in the wire
E33 BLK Under all conditions Measure the voltage to ground: There should be less than 0.5 V.Poor ground (G601)
An open in the wire
F20 BLK Under all conditions Measure the voltage to ground: There should be less than 0.5 V.Poor ground (G401)
An open in the wire
T34 BLK Under all conditions Measure the voltage to ground: There should be less than 0.5 V.Poor ground (G501)
An open in the wire
S1 ·
S5 ORN
·
BLK Combination light switch OFF Measure the voltage between
terminals S1 and S5:
There should be less than 1 V. Faulty combination light switch
An open in the wire
Combination light switch in any
other position than OFF Measure the voltage between
terminals S1 and S5:
There should be more than 5 V. Faulty combination light switch
A short to ground in the wire
S11 ·
S5 PNK
·
BLK Combination light switch
(Headlight position) ON
Measure the voltage between
terminals S11 and S5:
There should be less than 1 V. Faulty combination light switch
An open in the wire
Combination light switch OFF Measure the voltage between terminals S11 and S5:
There should be more than 5 V. Faulty combination light switch
A short to ground in the wire
S12 ·
S5 RED
·
BLK Combination light switch lever
pulled (Passing)
Measure the voltage between
terminals S12 and S5:
There should be less than 1 V. Faulty combination light switch
An open in the wire
Combination light switch lever
released from passing position Measure the voltage between
terminals S12 and S5:
There should be more than 5 V. Faulty combination light switch
A short to ground in the wire
S13 ·
S5 GRY
·
BLK Combination light switch
(SMALL position) ON
Measure the voltage between
terminals S13 and S5:
There should be less than 1 V. Faulty combination light switch
An open in the wire
Combination light switch OFF Measure the voltage between terminals S13 and S5:
There should be more than 5 V. Faulty combination light switch
A short to ground in the wire
S16 ·
S5 LT BLU
·
BLK Combination light switch
(Dimmer) in high beam position
Measure the voltage between
terminals S16 and S5:
There should be less than 1 V. Faulty combination light switch
An open in the wire
Combination light switch
(Dimmer) in low beam position Measure the voltage between
terminals S16 and S5:
There should be more than 5 V. Faulty combination light switch
A short to ground in the wire
C3 ORN Ignition switch ON (II) Measure the voltage between terminal C3 and body ground:
There should be battery voltage.Faulty ignition switch
An open in the wire
08/08/21 14:26:58 61SNR030_220_0167
ProCarManuals.com
DYNOMITE -2009-


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Special Tools Required
YES
NO YES
NO
22-170Exterior Lights
HID Lamp System Troubleshooting
A
B
A transient high tension (25,000 V) occurs at the
bulb sockets or the high intensity discharge (HID)
lamps when the combination light switch is turned
ON, it may cause serious electrical shock or
electrocution if you do not observe the cautions.
 Never turn on the combination light switch before fitting the HID bulbs to their bulb sockets
and completing the reassembly of the headlight
assembly.
 Do not service the headlights assembly in wet conditions, such as rain or snow, near a sprinkler
system, or when your hands are wet to prevent
electrocution.
 Do not touch the surface of the HID bulbs with your bare hands and do not stain it with any oils
and fats.
 Do not disassemble the inverter unit and the igniter unit.
 Do not turn on the HID bulb by using a power source other than the battery mounted on your
vehicle.
HID bulb test light 07AAJ-S3MA100
NOTE: Before troubleshooting the HID Lamp System,
do the multiplex integrated control system
troubleshooting using B-CAN System Diagnosis Test
Mode A (see page 22-93). 1. Check the No. 16 (15 A), No. 17 (15 A), and No. 21 (30 A) fuses in the under-dash fuse/relay box.
Go to step 2.
Replace the fuse(s), and recheck.
2. Turn the combination light switch OFF.
3. Do the battery terminal disconnection procedure (see page 22-68). 4. Remove the socket from the HID bulb (see page
22-168).
5. Check for corrosion (A) and traces of electrical arcing (B) at the socket mating part.
Go to step 7.
Replace the socket, and recheck.
Ar e f uses OK ? I s t he sock et cor r od ed or bur nt ?
08/08/21 14:27:00 61SNR030_220_0172
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DYNOMITE -2009-



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YES
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LEFT HEADLIGHT
RIGHT HEADLIGHT
YES
NO
22-172Exterior Lights
HID Lamp System Troubleshooting (cont’d)
HID UNIT 2P CONNECTOR
LEFT HEADLIGHT (PUR)
RIGHT HEADLIGHT (GRN)
HID UNIT 2P CONNECTOR (LEFT HEADLIGHT)PUR
UNDER-DASH FUSE/RELAY BOX CONNECTOR G (21P)
UNDER-DASH FUSE/RELAY BOX CONNECTOR F (34P) HID UNIT 2P CONNECTOR (RIGHT HEADLIGHT) GRN
16. Measure the voltage between the HID unit 2P
connector terminal No. 2 and body ground.
Substitute a known-good HID unit, and
recheck. If the symptom/indication goes away,
replace the original HID unit.
Go to step 17.
17. Disconnect under-dash fuse/relay box connector G (21P) and/or F (34P) .1: Left headlight
2: Right headlight 18. Check for continuity between under-dash fuse/relay
box G (21P) terminal No. 17 or F (34P) terminal
No. 4 and HID unit 2P connector terminal No. 2.
Replace the under-dash fuse/relay box.
Repair an open in the wire between the
under-hood fuse/relay box and the HID unit.
12
Wire side of female terminals
Wire side of female terminalsWire side of female terminals
Wire side of female terminals Wire side of female terminals
Is there battery voltage?
Is there continuity?
08/08/21 14:27:00 61SNR030_220_0174
ProCarManuals.com
DYNOMITE -2009-

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22-182Turn Signal/Hazard Warning Lights
Component Location Index
HAZARD WARNING SWITCH
TURN SIGNAL INDICATORS
TURN SIGNAL SWITCH
(Built into the combination switch)
MICU
(Built into the under-dash fuse/relay box) Test/Replacement, page 22-192
Test/Replacement, page 22-166
Input Test, page 22-188
08/08/21 14:27:42 61SNR030_220_0184
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