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Acura CSX. Manual - part 539

＊０１

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−

22-203

Circuit Diagram

R13

ORN

LT BLU

BLK

G501

LOCK

WHT

T23

BRN

T24

LT GRN

UNDER-DASH FUSE/RELAY BOX

7*2
1*1

8*1
9*2

PNK

R16

G501

BLK

T34

BLK

G401

F20

GRY

LT BLU

CEILING LIGHT

BLU

PNK

FRONT
INDIVIDUAL
MAP LIGHTS

PNK

DOOR

IG1

B-CAN

No. 22 (7.5 A)

No. 2 (IG) (50 A)

No. 1 (BAT) (100 A)

OFF

UNDER-DASH FUSE/RELAY BOX

(7.5 A)

No. 10

PNK

RED

BLU

BRN

E17

E33

G601

BLK

G602

MICU

E37

GRN

LT GRN

G504

BLK

PNK

WHT

IG1

BAT

UNDER-HOOD FUSE/RELAY BOX

BATTERY

IGNITION SWITCH

IG1 HOT in ON (II)
and START (III)

INTERIOR
LIGHT
SWITCH

IMMOBILIZER-
KEYLESS CONTROL
UNIT

DRIVER’S
DOOR
SWITCH
(Closed:
Door open)

FRONT
PASSENGER’S
DOOR SWITCH
(Closed:
Door open)

LEFT
REAR DOOR
SWITCH
(Closed:
Door open)

RIGHT
REAR DOOR
SWITCH
(Closed:
Door open)

IGNITION
KEY
SWITCH
(Closed:
Key inserted)

IMMOBILIZER-
KEYLESS
CONTROL
UNIT

DRIVER’S
DOOR
LOCK
KNOB
SWITCH

UN-
LOCK

IGNITION
KEY LIGHT
(LED)

: CAN line

*1: ’06 07 models
*2: ’08 09 models

TRANSMITTER

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０１

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22-204

Entry Lights Control System

MICU Input Test

UNDER-DASH FUSE/RELAY BOX CONNECTOR E (42P)

BLK

BRN

GRY

UNDER-DASH FUSE/RELAY BOX CONNECTOR F (34P)

BLK

LT GRN

GRN

1. Before testing the entry lights control system, troubleshoot the system using B-CAN System Diagnosis Test Mode

A (see page 22-93).

2. Check the No. 10 (7.5 A) fuse in the under-dash fuse/relay box. If any fuse is blown, replace it and go to step 3.

3. Disconnect under-dash fuse/relay box connectors E, F, K, R, and T.

NOTE: All connector views are shown from wire side of female terminals.

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０２

Cavity

Wire

Test condition

Test: Desired result

Possible cause if desired result

is not obtained

22-205

UNDER-DASH FUSE/RELAY BOX
CONNECTOR K (8P)

PNK

WHT

BLK

PNK

UNDER-DASH FUSE/RELAY BOX
CONNECTOR R (20P)

UNDER-DASH FUSE/RELAY BOX
CONNECTOR T (34P)

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.
• If the terminals look OK, go to step 5.

5. With the connectors still disconnected, do this input test 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.

•

•
•
•

•

PNK

With the ceiling light
switch in the middle
position
With moonroof:
with the interior light
switch in DOOR
position

Attach to ground:
The ceiling light and front
individual map lights should
come on.

Blown No. 22 (7.5 A) fuse in
the under-hood fuse/relay
box
Blown bulb(s)
Faulty ceiling light
Faulty front individual map
light
Faulty interior light switch
(with moonroof)
An open in the wire

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Cavity

Wire

Test condition

Test: Desired result

Possible cause if desired result is not

obtained

22-206

Entry Lights Control System

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.

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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

E37

GRN

Driver’s door open

Measure the voltage to ground:
There should be less than 1 V.

Faulty driver’s door switch
An open in the wire

Driver’s door closed

Measure the voltage to ground:
There should be more than 5 V.

Faulty driver’s door switch
A short to ground in the wire

LT GRN

Front passenger’s door open

Measure the voltage to ground:
There should be less than 1 V.

Faulty front passenger’s door switch
An open in the wire

Front passenger’s door closed

Measure the voltage to ground:
There should be more than 5 V.

Faulty front passenger’s door switch
A short to ground in the wire

GRY

Right rear door open

Measure the voltage to ground:
There should be less than 1 V.

Faulty right rear door switch
An open in the wire

Right rear door closed

Measure the voltage to ground:
There should be more than 5 V.

Faulty right rear door switch
A short to ground in the wire

E17

BRN

Left rear door open

Measure the voltage to ground:
There should be less than 1 V.

Faulty left rear door switch
An open in the wire

Left rear door closed

Measure the voltage to ground:
There should be more than 5 V.

Faulty left rear door switch
A short to ground in the wire

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

Ignition switch OFF and ignition
key removed from the ignition
switch

Measure the voltage to ground:
There should be more than 5 V.

Faulty ignition key switch
A short to ground in the wire

T23

WHT

Driver door lock knob switch
unlocked

Measure the voltage to ground:
There should be less than 1 V.

Poor ground (G501)
Faulty driver door lock knob switch
An open in the wire

Driver door lock knob switch
locked

Measure the voltage to ground:
There should be more than 5 V.

Faulty driver door lock knob switch
A short to ground in the wire

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Content .. 537 538 539 540 ..