Honda Civic. Manual — part 399

ECM/PCM and the
brake pedal position
switch

Clutch pedal
position
switch signal

Clutch pedal
pressed, then
released

SHIFT/CLUTCH
SW should indicate
ON when the clutch
pedal is pressed and
OFF when the clutch
pedal is released.

Faulty clutch pedal
position switch

Open in the wire
between the ECM
and the clutch pedal
position switch

Short to ground in
the wire between the
ECM and the clutch
pedal position
switch

Poor ground G401

Transmission
range switch
signal

Shift lever in D,
D3, and 2

SHIFT/CLUTCH
SW should indicate
ON in P, R, N, and 1
and OFF in D, D3,
and 2.

Faulty transmission
range switch

Open in the wire
between the PCM
and the transmission
range switch

Short to in the wire
ground between the
PCM and the
transmission range
switch

Poor ground G101

CRUISE MASTER
(MAIN) SW should
indicate ON when

Faulty cruise control
main switch

Faulty gauge control
module (tach)

Open in the wire
between the gauge

2008 Honda Civic LX

2006-08 ACCESSORIES & EQUIPMENT Cruise Control (R18A1) - Civic (All Except Hybrid)

Cruise
control main
switch signal

Cruise control
main switch ON
and OFF

the cruise control
main switch is turned
ON and OFF when
the cruise control
main switch is turned
OFF.

control module
(tach) and the cruise
control main switch

Short to ground in
the wire between the
gauge control
module (tach) and
the cruise control
main switch

Set switch
signal

Set/decel switch
pressed and
released

CRUISE SET SW
should indicate ON
when the set/decel
switch is pressed and
OFF when the
set/decel switch is
released.

Faulty cruise control
combination switch

Faulty gauge control
module (tach)

Open in the wire
between the gauge
control module and
the cruise control
combination switch

Short to ground in
the wire between the
gauge control
module and the
cruise control
combination switch

Resume
switch signal

Resume/accel
switch pressed
and released

CRUISE RESUME
SW should indicate
ON when the
resume/accel switch
is pressed and OFF
when the

Faulty cruise control
combination switch

Faulty gauge control
module (tach)

Open in the wire
between the gauge
control module
(tach) and the cruise
control combination

2008 Honda Civic LX

2006-08 ACCESSORIES & EQUIPMENT Cruise Control (R18A1) - Civic (All Except Hybrid)

CRUISE CONTROL COMBINATION SWITCH TEST/REPLACEMENT

SRS components are located in this area. Review the SRS component locations (see
COMPONENT LOCATION INDEX ) and the precautions and procedures (see
PRECAUTIONS AND PROCEDURES ) in the SRS before doing repairs or
service.

1. Remove the driver's airbag (see DRIVER'S AIRBAG REPLACEMENT ).
2. Disconnect the connectors (A), then remove the steering wheel trim (B).

resume/accel switch
is released.

switch

Short to ground in
the wire between the
gauge control
module (tach) and
the cruise control
combination switch

Cancel
switch signal

Cancel switch
pressed and
released

CRUISE CANCEL
SW should indicate
ON when the cancel
switch is pressed and
OFF when the cancel
switch is released.

Faulty cruise control
combination switch

Faulty gauge control
module (tach)

Cruise
control
indicator
signal

Start the engine,
turn the cruise
control main
switch on, and
drive the vehicle
above 25 mph
(40 km/h). Set
and cancel the
cruise control.

CRUISE
INDICATOR should
indicate ON when
the cruise control is
set and OFF when
the cruise control is
canceled.

Faulty ECM/PCM

Cruise control was
not set at the test by
other malfunction

2008 Honda Civic LX

2006-08 ACCESSORIES & EQUIPMENT Cruise Control (R18A1) - Civic (All Except Hybrid)

Fig. 3: Removing Steering Wheel Trim
Courtesy of AMERICAN HONDA MOTOR CO., INC.

3. Remove the cruise control combination switch.

Fig. 4: Removing Cruise Control Combination Switch
Courtesy of AMERICAN HONDA MOTOR CO., INC.

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

to Fig. 5 .

If there is continuity, and it matches the table, but switch failure occurred
on the cruise control input test, check and repair the wire harness on the

2008 Honda Civic LX

2006-08 ACCESSORIES & EQUIPMENT Cruise Control (R18A1) - Civic (All Except Hybrid)