Honda Civic. Manual — part 706

(CONNECTOR RECONNECTED)

Cavity Wire

Test condition

Test:

Desired

result

Possible cause if

result is not

obtained

15

BLK Under all conditions

Check for
voltage to
ground:
There should
be less than
0.5 V.

Poor ground
(G503)

An open in the
wire

16

BLK Under all conditions

Check for
voltage to
ground:
There should
be less than
0.5 V.

Poor ground
(G504)

An open in the
wire

17

BRN Ignition switch ON (ID

Check for
voltage to
ground:
There should
be battery
voltage.

Blown No. 10
(7.5 A) fuse in
the under-dash
fuse/relay box

An open in the
wire

18

WHT Under all conditions

Check for
voltage to
ground:
There should
be battery
voltage.

Blown No. 23
(10 A) fuse in
the under-hood
fuse/relay box

An open in the
wire

Ignition switch ON
(II), ILLUMI (+)
switch pressed

Check for
voltage to
ground:
There should
be less than 1

Poor ground
(G501)

Faulty dash
light
brightness

2008 Honda Civic EX

2006-08 ACCESSORIES & EQUIPMENT Gauges - Civic (All Except Hybrid)

4

BRN

V.

controller

An open in the
wire

Ignition switch ON

(II), ILLUMI (+)

switch released

Check for
voltage to
ground:
There should
be 5 V or
more.

Faulty dash
light
brightness
controller

A short to
ground in the
wire

5

YEL

Ignition switch ON
(II), ILLUMI (-)
switch pressed

Check for
voltage to
ground:
There should
be less than 1
V.

Poor ground
(G501)

Faulty dash
light
brightness
controller

An open in the
wire

Ignition switch ON

(II), ILLUMI (-)

switch released

Check for
voltage to
ground:
There should
be 5 V or
more.

Faulty dash
light
brightness
controller

A short to
ground in the
wire

6

BLU

Ignition switch ON
(II), SELECT/RESET
switch pressed

Check for
voltage to
ground:
There should
be less than 1
V.

Poor ground
(G501)

Faulty dash
light
brightness
controller

An open in the
wire

2008 Honda Civic EX

2006-08 ACCESSORIES & EQUIPMENT Gauges - Civic (All Except Hybrid)

Ignition switch ON

(II), SELECT/RESET

switch released

Check for
voltage to
ground:
There should
be 5 V or
more.

Faulty dash
light
brightness
controller

A short to
ground in the
wire

7

PUR

Ignition switch ON
(II), mph, km/h switch
pressed

Check for
voltage to
ground:
There should
be less than 1
V.

Poor ground
(G501)

Faulty dash
light
brightness
controller

An open in the
wire

Ignition switch ON

(II), mph, km/h switch

released

Check for
voltage to
ground:
There should
be 5 V or
more.

Faulty dash
light
brightness
controller

A short to
ground in the
wire

8

(Canada

models)

BLU

Ignition switch ON
(II), washer fluid is
half or more in the
washer reservoir

Check for
voltage to
ground:
There should
be less than 1
V.

Poor ground
(G401)

Faulty washer
fluid level
switch

An open in the
wire

Ignition switch ON
(II), washer fluid is

empty in the washer

Check for
voltage to
ground:
There should

Faulty washer
fluid level
switch

2008 Honda Civic EX

2006-08 ACCESSORIES & EQUIPMENT Gauges - Civic (All Except Hybrid)

GAUGE CONTROL MODULE (SPEEDO) INPUT TEST

reservoir

be 5 V or
more.

A short to
ground in the
wire

27

GRN

Ignition switch ON
(II), brake fluid is full
level in the reservoir

Check for
voltage to
ground:
There should
be 5 V or
more.

Faulty brake
fluid level
switch

A short to
ground in the
wire

Ignition switch ON

(II), brake fluid is

lower level in the

reservoir

Check for
voltage to
ground:
There should
be less than 1
V.

Poor ground
(G401)

Faulty brake
fluid level
switch

An open in the
wire

28

LT

GRN

Ignition switch ON
(II), parking brake
lever pulled

Check for
voltage to
ground:
There should
be less than 1
V.

Faulty parking
brake switch

An open in the
wire

Ignition switch ON

(II), parking brake

lever released

Check for
voltage to
ground:
There should
be 5 V or
more.

Faulty parking
brake switch

A short to
ground in the
wire

NOTE:

Before testing, do the gauge control module self-diagnosis
procedure, and make sure the B-CAN communication line is
OK.

2008 Honda Civic EX

2006-08 ACCESSORIES & EQUIPMENT Gauges - Civic (All Except Hybrid)