Honda Civic. Manual — part 699

Fig. 3: Identifying Gauge Control Modules

SELF-DIAGNOSTIC FUNCTION

2008 Honda Civic EX

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

Before troubleshooting the gauge system, refer to multiplex integrated control
system B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-
CAN SYSTEM DIAGNOSIS TEST MODE A ).

The gauge control module (tach) has a self-diagnostic function shown, and also has
a customizable reset function.

The beeper drive circuit check.

The indicator drive circuit check.

The switch input test.

The LCD segments check.

4-door: The gauges drive circuit check (Tachometer, Fuel gauge, Coolant
temperature gauge).

2-door: The self-diagnostic function does not operate the Fuel gauge and
Coolant temperature gauge.

The communication line check (of the body-controller area network (B-CAN)
communication line and the fast-controller area network (F-CAN)
communication line between the gauges).

ENTERING THE SELF-DIAGNOSTIC FUNCTION WITH THE HDS

4-door: Using the HDS, select Body Electrical, Gauges, then Function Test and do
the self-diagnostic Function.

2-door: Use the manual method.

ENTERING THE SELF-DIAGNOSTIC FUNCTION (MANUAL METHOD)

Before doing the self-diagnostic function, check the No. 10 (7.5 A) fuse in the
under-dash fuse/relay box and the No. 23 (10 A) fuse in the under-hood fuse/relay
box.

1. Push and hold the SEL/RESET switch button.
2. Turn the headlights ON.

NOTE:

Indicators are also controlled via the communication line.

2008 Honda Civic EX

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

3. Turn the ignition switch ON (II).
4. Within 5 sec, turn the headlights OFF, then ON and OFF again.
5. Within 5 sec, release the SEL/RESET switch button, and then push and release

the button three times repeatedly.

THE INDICATOR DRIVE CIRCUIT CHECK

When entering the self-diagnostic mode, the following indicators blink:

ABS indicator, A/T gear position indicator, brake system indicator, charging system
indicator, cruise control indicator, cruise indicator, door indicator, DRL indicator,
high beam indicator, immobilizer indicator, lights-on indicator, low fuel indicator,
malfunction indicator lamp (MIL), oil pressure indicator, Seat belt indicator,
security indicator, side airbag off indicator, smart maintenance indicator, SRS
indicator, trunk indicator, and washer fluid level indicator (Canada models).

SWITCH INPUT CHECK

NOTE:

While in the self-diagnostic mode, the dash lights
brightness controller operates normally.

While in the self-diagnostic mode, the SEL/RESET
button is used to start the Beeper Drive Circuit Test
and the Gauge Drive Circuit Check.

If the vehicle speed exceeds 1.2 mph (2 km/h) or the
ignition switch is turned OFF, the self-diagnostic
mode ends.

Fig. 4: Self-Diagnostic Function Blinking Pattern

2008 Honda Civic EX

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

At the initial stage of the self-diagnostic function, the beep sounds intermittently,
the beeper sounds continuously when any of the following switch inputs are
switched from OFF to ON:

Cruise control master, SET, RESUME, CANCEL switches, SEL/RESET switch,
mph-km/h switch, illumination volume (+), (-) switch, parking brake switch, and
VSA OFF switch.

THE BEEPER DRIVE CIRCUIT CHECK

When entering the self-diagnostic mode, the beeper sounds five times.

THE LCD SEGMENT CHECK

4-door: When entering the self-diagnostic mode, all the segments blink five times.

2-door: Self-diagnostic function does not operate the Fuel gauge and Coolant
temperature gauge.

THE GAUGE DRIVE CIRCUIT CHECK

When entering the self-diagnostic mode, the tachometer, needle sweeps from the
minimum position to maximum position, then returns to the minimum position.

The check cannot be started again until the gauge needle returns to the minimum
position.

The needle sweeps from the minimum position to the maximum position, then
return to the minimum position.

NOTE:

After the beeper stops sounding and the gauge needle
returns to the minimum position, pushing the SEL/RESET
switch starts the Beeper Drive Circuit Check (one beep) and
the Gauge Drive Circuit Check again.

2008 Honda Civic EX

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