Honda Accord 2008 Manual page 1468

07/11/02 09:34:14 61TA0000_190_0047
Diagnostic Trouble Code (DTC)
• The memory can hold all DTCs. However, when the
same DTC is detected more than once, the more
recent DTC is written over the earlier one. Therefore,
when the same problem is detected repeatedly, it is
memorized as a single DTC.
• The DTCs are indicated in ascending number order,
not in the order they occur.
• The DTCs are memorized in the EEPROM. Therefore,
the memorized DTCs cannot be erased by
disconnecting the battery. Do the specified
procedures to clear the DTCs.
Self-diagnosis
• Self-diagnosis can be classified into two categories:
– Initial diagnosis: Done right after the ignition switch
is turned to ON (II) and until the ABS and VSA
indicators go off.
– Regular diagnosis: Done right after the initial
diagnosis until the ignition switch is turned to
LOCK (0).
• When the system detects a problem, the VSA
modulator-control unit shifts to fail-safe mode.
Kickback
The pump motor operates when the VSA modulator-
control unit is functioning, and the fluid in the reservoir
is forced out to the master cylinder, causing kickback at
the brake pedal.
Pump Motor
• The pump motor operates when the VSA modulator-
control unit is functioning.
• The VSA modulator-control unit checks the pump
motor operation one time after completing initial
diagnosis during regular diagnosis when the vehicle
is driven over 10 mph (15 km/h).
Brake Fluid Replacement/Air Bleeding
Brake fluid replacement and air bleeding procedures
are identical to the procedures used on vehicles without
the VSA system (see page 19-9).
How to Troubleshoot DTCs
The troubleshooting procedures assume that the cause
of the problem is still present and the ABS and/or VSA
indicator is still on. Following a troubleshooting
procedure for a code that has been cleared but does not
reset can result in incorrect diagnosis.
1. Question the customer about the conditions when
the problem occurred, and try to reproduce the
same conditions for troubleshooting. Find out
when the ABS and/or VSA indicator came on, such
as during activation, after activation, when the
vehicle was traveling at a certain speed, etc. If
necessary, have the customer demonstrate the
concern.
2. When the ABS or VSA indicator does not come on
during the test-drive, but troubleshooting is done
based on the DTC, check for loose connectors, poor
contact of the terminals, etc. before you start
troubleshooting.
3. After troubleshooting, or the repairs are done, clear
the DTCs, and test-drive the vehicle under the same
conditions that originally set the DTCs. Make sure
the ABS and VSA indicators do not come on.
4. Check for DTCs from other systems which are
connected via F-CAN. If there are DTCs that are
related to F-CAN, the most likely cause was that the
ignition switch was turned to ON (II) with the VSA
modulator-control unit connector disconnected.
Clear the DTCs. Check for fuel and emissions, and
VSA codes, first. Be sure to troubleshoot those first.
Intermittent Failures
The term ''intermittent failure'' means a system may
have had a failure, but it checks OK now. If the
indicator(s) of the system does not come on, check for
loose connectors or poor contacts in the terminals
related to the circuit that you are troubleshooting.
(cont'd)
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