Honda Civic 2002-2003 Service Manual page 908

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4. Make these input tests at the connector.
If any test indicates a problem, find and correct the cause, then recheck the system.
If all the input tests prove OK, the control unit must be faulty. Replace it.
Cavit,,-
Wire Test condition
2 RED/BLU Underall
f-"='-"+~==~+-c"====
.....
--+~
__
Test: Desired result Possible cause if result is not obtained
Check for voltage to ground:
I'
Blown No. 14 (40A) fuse in the
conditions
,
12
YEL/RED Ignition switch
ON (II)
4 BLK Under all
conditions
7 BLK Under all
,
There should be battery voltage.' under-hood fuse/relay box
Check for voltage to ground:
There should be battery voltage.
Check for continuity to ground:
There should be continuity.
Check for continuity to ground:
i •
Blown No.3 (lOA) fuse in the
under-dash fuse/relay box
• An open in the wire
• Blown No. 12 (7.5A) fuse in the
under-dash fuse/relay box
• An open in the wire
• Poor ground (G501)
• An ODen in the wire
• Poor ground (G501)
I
conditions
10 RED/YEL
i
Combination
~~~-I-~c~~~-;-'o"''''!'''''-'''
___
--t_T~h"e"r"e~s~h"o",u Id be conti nu ity.
Check for voltage to ground:
• An open in the wire
• Blown No. 15 (15A) fuse in the
light switch ON There should be battery voltage. under-hood fuse/relay box
(iilD)
• Faulty headlight relay 2
• Faulty combination light switch
• An open in the wire
1 RED/BLU
Combination Connect a jumper wire between • Blown bulb
light switch ON ,No.3 and No.1 terminals. • Faulty low beam cut relay
(iilD),
and : Both headlights (HIGH) and • Faulty combination light switch
J
dimmer switch ,high beam indicator light • Poor ground (G501)
1--___ ' ____
--+-'i"'n"H-"I"G"H'--_ _ _
-I--'s"h"o"u"l"d-"c"'"o"'m~e"_"'o'.'n'_.
_ _
~---+_'·~AC"'n.'o=D'en
in the wi re
11 RED/BLK Combination Connect a jumper wire between • Blown bulb
3 GRN/BLK
5
i
6 GRN/ORN
8
,
BLU/RED
I
I
9
WHT/BLU
i
1---.-
13 GRN/RED
light switch ON No.5 and No. 11 terminals. I • Faulty combination light switch
(iD), and Right headlight (HIGH) should • Poor ground (G501l
~~~~~
switch
i
come on ..
_~~
_ _ _ _
~--L_' ~A~n___c0-p-e-n-i-nccth~w-ir~cc_~-c-cc-1
Combination
I
Check for continuity to ground: • Faulty combination light switch
light switch ON 'There should be continuity. • Poor ground (G501)
(iD), and
I' •
An open in the wire
i
dimmer switch
I
in HIGH
I
Parking brake Check for continuity to ground: • Faulty parking brake switch
lever pulled There should be continuity"__ • An open ',n the wire
, Combination Check for voltage to ground: • Faulty headlight relays
light switch OFF There should be battery voltage. Short to ground
Ignition switch
ON (II)
Ignition switch
ON (II)
I
Attach to ground:
The DRL indicator light should
• An open in the wire
• Blown No. 10 (7.5A) fuse in the
under-dash fuse/relay box
come on. • Faulty DRL indicator
_~
___
~
_____ ---jl_'
-oA .. n. "open
int~e.
w=i
r",-e-c-~
_ _
---j
Attach to ground: • Faulty brake system indicator
The brake system light should
I ·
An open in the wire
come on. ;
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