2001 HONDA ACCORD COUPE diagnostic

Traction Control System

TCS ON/OFF Switch

This switch is under the side vent. It lets you turn the Traction ControlSystem on and off. You cannot turn
off the TCS while the TCS indicator
light is flashing. Deactivate the system by pressing
the TCS On/Off switch. The TCS
indicator light comes on as a
reminder. Pressing the switch again
turns the system back on.
The Traction Control System turns on every time you start the engine,
even if you turned it off the last time
you drove the vehicle. TCS Indicator
The TCS indicator comes on orflashes under the following condi-tions:
When you turn the ignition switch
to ON (II).
When you manually turn off the

TCS.
It flashes when the TCS is

regulating wheelspin.

If the system's diagnostics senses
a problem in the TCS, the indica-
tor will come on and stay on.
If the brakes overheat, the
indicator will come on.

CONTINUED

Driving

Malfunction Indicator Lamp

Readiness Codes
Your car has certain "readiness codes" that are part of the on-board
diagnostics for the emissions
systems. In some states, part of the
emissions testing is to make sure
these codes are set. If they are not set, the test cannot be completed.
If your car's battery has been
disconnected or gone dead, these
codes are erased. It takes severaldays of driving under various
conditions to set the codes again.
If possible, do not take your car for a
state emissions test until the
readiness codes are set. See State
Emissions Testing on page 336.
(For V6 and L4-ULEV)
To check if they are set, turn the ignition ON (II), but do not start
the engine. The Malfunction
Indicator Lamp will come on for
20 seconds. If it then goes off,
the readiness codes are set. If it blinks 5 times, the readiness
codes are not set. See State
Emissions Testing on pages 301 and
302.
Taking Care of the Unexpected

State Emissions Testing

Testing of Readiness Codes
If you take your vehicle for a state
emissions test shortly after the
battery has been disconnected or
gone dead, it may not pass the test.
This is because of certain "readiness codes" that must be set in the on-
board diagnostics for the emissionssystems. These codes are erased
when the battery is disconnected, and set again only after several days
of driving under a variety of
conditions. If the testing facility determines that
the readiness codes are not set, you
will be requested to return at a later date to complete the test. If you must
get the vehicle re-tested within the next two or three days, you can
condition the vehicle for re-testing
by doing the following.
Make sure the gas tank is nearly,
but not completely, full (around 3/4).
Make sure the vehicle has been
parked with the engine off for 8
hours or more.
Make sure the ambient
temperature is between 20° and
95°
F.
Without touching the accelerator
pedal, start the engine and let it
idle for 20 seconds.
Keep the vehicle in Park (automatic transmission) or
Neutral (manual transmission). Increase the engine speed to 2,000
rpm and hold it there until the
temperature gauge rises to at least 1/4 of the scale (approximately 3

minutes).

Technical Information