ACURA CSX 2006 Service Repair Manual

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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
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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
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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
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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
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22-167
Light switch
Turn signal switchPosition
469
1011 12
1212
Headlight
switch
Passing
switch OFF
ON
OFF HIGHLOW
LEFT
RIGHT
Neutral Terminal
Position Terminal
Fog light switch (TYPE S and ’08 PREMIUM and ’09 models) Position Terminal
ON
OFF 12
8
5. Inspect the connector 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.
 If the terminals look OK, check for continuity between the terminals in each switch position according to thetables.
– If the continuity is not as specified, replace the switch.
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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).
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22-169
HID Unit Replacement
AB
1. Turn the combination light switch OFF.
2. Make sure the ignition switch is in LOCK (0)
position, then do the battery terminal
disconnection procedure (see page 22-68).
3. Remove the headlight assembly (see page 22-174).
4. Remove the socket from the HID bulb (see page 22-168).
5. Remove the three mounting screws and the HID unit (A).
6. Disconnect the 4P connector (B) from the HID unit. 7. Install the HID unit in the reverse order of removal.
8. Do the battery terminal reconnection procedure
(see page 22-68).
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µ
µ µ
µ
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 ?
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µ
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YES
NO YES
NO
22-171
B
A
07AAJ-S3MA100 HID UNIT 2P CONNECTOR
BLK
6. Connect the HID bulb test light (A) to the socket (B).
7. Do the battery terminal reconnection procedure(see page 22-68).
8. Turn the combination light (headlight) switch ON.
Replace the original HID bulb (see page
22-168).
Go to step 10.
9. Turn the combination light (headlight) switch OFF.
10. Do the battery terminal disconnection procedure (see page 22-68).
11. Disconnect the HID bulb test light from the socket.
12. Do the battery terminal reconnection procedure (see page 22-68).
13. Disconnect the HID unit 2P connector.
14. Turn the combination light (headlight) switch ON. 15. Check for continuity between the HID unit 2P
connector terminal No. 1 and body ground.
Go to step 16.
Repair an open in the wire between the HID
unit and body ground. If the wire is OK, check for
poor ground at G201 or G301.
(cont’d)
Wire side of female terminals
Does t he bul b i n t he t est l i ght come on? Is there continuity?
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YES
NO
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?
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