2006 ACURA CSX lights


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DTC B1078:
YES
NO
YES
NO YES
NO
22-157
DTC Troubleshooting
UNDER-DASH FUSE/RELAY BOX CONNECTOR E (42P)
GND (BLK)
UNDER-DASH FUSE/RELAY BOX CONNECTOR F (34P) GND (BLK)
GND (BLK)
Daytime Running Lights System
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).
1. Turn the ignition switch to ON (II).
2. Pull the parking brake lever.
3. Clear the DTCs with the HDS.
4. Release the parking brake lever.
5. Turn the ignition switch to LOCK (0), and then back to ON (II).
6. Check for DTCs with the HDS.
Go to step 7.
Intermittent failure. The daytime running
lights system is OK at this time. Check for loose or
poor connections.
7. Turn the headlight switch ON (high beam).
Go to step 8.
Go to step 10.
8. Turn the ignition switch to LOCK (0). 9. Measure the voltage between under-dash fuse/
relay box connector E (42P) terminals No. 6 and
No. 33 and body ground, and between under-dash
fuse/relay box connector F (34P) terminal No. 20
and body ground individually.
Faulty MICU; replace the under-dash fuse/
relay box (see page 22-66).
Repair an open in the BLK wire or poor
ground (G 401, G501, G601, G602).
10. Turn the ignition switch to LOCK (0) and turn the headlight switch OFF.
(cont’d)
Wire side of female terminalsWire side of female terminals
Is DTC B1078 indicated?
Do bot h head l i ght s ( hi gh beam) come on? I s t her e l ess t han 0.5 V ?
08/08/21 14:26:56 61SNR030_220_0159
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DYNOMITE -2009-



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YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
22-158Exterior Lights
DTC Troubleshooting (cont’d)
UNDER-DASH FUSE/RELAY BOX CONNECTOR F (34P)
BRH/L(HI)(WHT)
RIGHT HEADLIGHT (HIGH BEAM) 2P CONNECTOR B R H/L (HI) (WHT) UNDER-DASH FUSE/RELAY BOX CONNECTOR G (21P)
LEFT HEADLIGHT (HIGH BEAM) 2P CONNECTOR B L H/L (HI) (PNK)
B L H/L (HI) (PNK)
HEADLIGHT (HIGH BEAM) 2P CONNECTOR GND (BLK)
11. Check the No. 12, No. 13, and No. 18 fuses in theunder-dash fuse/relay box.
Go to step 12.
Replace the blown fuse and recheck. If the
No. 18 (20 A) fuse is blown again, replace the
under-dash fuse/relay box. If the No. 12 (10 A) or
No. 13 (10 A) fuse is blown again, repair a short in
the wire between the under-dash fuse/relay box
and appropriate headlight (high beam).
12. Check the headlight bulbs.
Go to step 13.
Replace the faulty bulb.
13. Disconnect under-dash fuse/relay box connectors F (34P) and G (21P).
14. Disconnect the both headlight (high beam) 2P connectors.
15. Check for continuity between right headlight (high beam) 2P connector terminal No. 2 and under-dash
fuse/relay box connector F (34P) terminal No. 22.
Go to step 16.
Repair an open in the wire between the right
headlight (high beam) and the under-dash fuse/
relay box. 16. Check for continuity between left headlight (high
beam) 2P connector terminal No. 2 and under-dash
fuse/relay box connector G (21P) terminal No. 15.
Go to step 17.
Repair an open in the wire between the left
headlight (high beam) and the under-dash fuse/
relay box.
17. Check for continuity between headlight (high beam) 2P connector terminal No. 1 and body
ground.
Faulty MICU; replace the under-dash fuse/
relay box (see page 22-66).
Repair an open in the BLK wire or poor
ground (G 201-right side, G301-left side).
Wire side of female terminals
Wire side of female terminals Wire side of female terminals
Wire side of female terminals
Wire side of female terminals
Ar e al l f uses OK ? Ar e t he head l i ght bul bs OK ?
Is there continuity? Is there continuity?
Is there continuity?
08/08/21 14:26:57 61SNR030_220_0160
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DYNOMITE -2009-

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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
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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 Wire Test conditionTest: Desired result Possible cause if desired result
is not obtained
22-164Exterior Lights
MICU Input Test (cont’d)
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.
5. With the connector still disconnected, 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, go to step 6.























E19 RED Under all conditions Connect battery power to terminal
E19:
The taillights, rear side marker
lights, and license plate lights
should come on.Poor ground (G701)
Blown bulb
An open in the wire
F3 RED Under all conditions Connect battery power to terminal F3:
The right front side marker light
and right front parking light
should come on.Poor ground (G201)
Blown bulb
An open in the wire
F4 GRN Under all conditions Connect battery power to terminal F4:
The right headlight (low beam)
should come on.Poor ground (G201)
Blown bulb
Faulty HID unit
An open in the wire
F22 WHT Under all conditions Connect battery power to terminal F22:
The right headlight (high beam)
should come on.Poor ground (G201)
Blown bulb
An open in the wire
G5 RED Under all conditions Connect battery power to terminal G5:
The left front side marker light
and left front parking light should
come on.Poor ground (G301)
Blown bulb
An open in the wire
G15 PNK Under all conditions Connect battery power to terminal G15:
The left headlight (high beam)
should come on.Poor ground (G301)
Blown bulb
An open in the wire
G17 PUR Under all conditions Connect battery power to terminal G17:
The left headlight (low beam)
should come on.Poor ground (G301)
Blown bulb
Faulty HID unit
An open in the wire
: With HID
08/08/21 14:26:58 61SNR030_220_0166
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22-166Exterior Lights
Combination Light Switch Test/Replacement
A
B
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 12P connector (A) from the combination light switch (B).
4. Remove the two screws, then slide out the combination light switch.
Terminal side of male terminals
08/08/21 14:26:59 61SNR030_220_0168
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22-168 Exterior Lights
HID Bulb Replacement
A
C B A
A transient high tension (25,000 V) occurs at the
bulb sockets of 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 headlight 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 fats.
 Do not turn on the HID bulb by using a power source other than the battery mounted on your
vehicle.
1. Turn the combination light switch OFF.
2. Do the battery terminal disconnection procedure (see page 22-68).
3. Remove the battery. (left side bulb) 4. Turn the cover (A) 45 ° counterclockwise to remove
it from the headlight assembly.
5. Turn the socket (A) 45 ° counterclockwise to remove it from the bulb (B).
6. Pull the retaining spring (C) away from the bulb then remove the bulb.
7. Install the new bulb in the reverse order of removal. Make sure the notches in the bulb align with the
tabs in the headlight.
8. Install the parts in the reverse order of removal.
9. Do the battery terminal reconnection procedure (see page 22-68).
08/08/21 14:26:59 61SNR030_220_0170
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