Honda Civic. Manual — part 1105

5. Reconnect the connectors to the under-dash fuse/relay box, and make these

input tests at the 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.

MICU INPUT TEST (CONNECTORS RECONNECTED)

An open in the
wire

S6

(1)

BLU

Wiper/washer
switch (intermittent
dwell timer) turned

Check resistance
between S6 and S4
terminals: There
resistance should vary
from about 0 to 1
kohms.

Faulty
wiper/washer
switch

An open in the
wire

Short to ground
in the wire

(1)

USA EX model and Canada models

Cavity Wire

Test condition

Test: Desired result

Possible cause if

result is not

obtained

E6

BLK

Under all
conditions

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

Poor ground
(G602)

An open in the
wire

T34 BLK

Under all
conditions

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

Poor ground
(G501)

An open in the
wire

Ignition switch ON

Check for voltage
between S10 and S4

Faulty
wiper/washer

2008 Honda Civic EX

2006-08 ACCESSORIES & EQUIPMENT Wipers/Washers - Civic (All Except Hybrid)

S10 ORN

(II), wiper/washer
switch (INT) ON

terminals, and S20 and
S4 terminals: There
should be less than 1
V.

switch

An open in the
wire

Ignition switch ON

(II), wiper/washer

switch OFF

Check for voltage
between S10 and S4
terminals, and S20 and
S4 terminals: There
should be 5 V or more.

Faulty
wiper/washer
switch

Short to ground
in the wire

S15 GRN

Ignition switch ON
(II), wiper/washer
switch (MIST) ON

Check for voltage
between S15 and S4
terminals: There
should be less than 1
V.

Faulty
wiper/washer
switch

An open in the
wire in the wire

Ignition switch ON

(II), wiper/washer

switch (MIST)

OFF

Check for voltage
between S15 and S4
terminals: There
should be 5 V or more.

Faulty
wiper/washer
switch

Short to ground
in the wire

S17

YEL

Ignition switch ON
(II), washer switch
ON

Check for voltage
between S17 and S4
terminals: There
should be less than 1
V.

Faulty
wiper/washer
switch

An open in the
wire

Ignition switch ON

(II), washer switch

OFF

Check for voltage
between S17 and S4
terminals: There
should be 5 V or more.

Faulty
wiper/washer
switch

Short to ground
in the wire

Ignition switch ON
(II), wiper/washer

Check for voltage
between S20 and S4
terminals: There

Faulty
wiper/washer
switch

2008 Honda Civic EX

2006-08 ACCESSORIES & EQUIPMENT Wipers/Washers - Civic (All Except Hybrid)

WIPER/WASHER SWITCH TEST

1. Remove the wiper/washer switch (see WIPER/WASHER SWITCH

REPLACEMENT ).

2. Disconnect the dashboard wire harness 8P connector (A) from the

wiper/washer switch (B).

S20

WHT

switch (LOW) ON should be less than 1

V.

An open in the
wire

Ignition switch ON

(II), wiper/washer

switch OFF

Check for voltage
between S20 and S4
terminals: There
should be 5 V or more.

Faulty
wiper/washer
switch

Short to ground
in the wire

WHT

Ignition switch ON
(II), wiper/washer
switch (HIGH) ON

Check for voltage
between S20 and S4
terminals: There
should be less than 1
V.

Faulty
wiper/washer
switch

An open in the
wire

Ignition switch ON

(II), wiper/washer

switch OFF

Check for voltage
between S20 and S4
terminals: There
should be 5 V or more.

Faulty
wiper/washer
switch

Short to ground
in the wire

2008 Honda Civic EX

2006-08 ACCESSORIES & EQUIPMENT Wipers/Washers - Civic (All Except Hybrid)

Fig. 10: Disconnecting Dashboard Wire Harness 8P Connector
Courtesy of AMERICAN HONDA MOTOR CO., INC.

3. Check for continuity between the terminals in each switch position according

to Fig. 11 .

Fig. 11: Checking Continuity Between Wiper/Washer Switch Terminals
Table
Courtesy of AMERICAN HONDA MOTOR CO., INC.

4. If the continuity is not as specified, replace the switch.

WIPER MOTOR TEST

1. Remove the wiper arms.

2008 Honda Civic EX

2006-08 ACCESSORIES & EQUIPMENT Wipers/Washers - Civic (All Except Hybrid)