Honda ACCORD HYBRID 2005 Service Manual page 1378

A B S / T C S Components
G e n e r a l T r o u b l e s h o o t i n g I n f o r m a t i o n
Diagnostic Trouble Code (DTC)
• The m e m o r y can hold any n u m b e r of DTCs. However,
w h e n the same DTC is detected more than once, the
more recent DTC is written over the earlier one.
Therefore, w h e n the same p r o b l e m 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 (non-
volatile m e m o r y ) . Therefore, the memorized DTCs
cannot be canceled by disconnecting the battery. Do
the specified procedures t o clear the DTCs.
Self-diagnosis
• Self-diagnosis can be classified into t w o categories:
- Initial diagnosis: Done right after the engine starts
and until the ABS and TCS indicators go off.
- Regular diagnosis: Done right after the initial
diagnosis until the ignition switch is turned OFF.
• W h e n a p r o b l e m is detected by self-diagnosis, the
ABS/TCS control unit shifts to fail-safe mode.
Kickback
The p u m p motor operates w h e n the ABS is f u n c t i o n i n g ,
and the fluid in the reservoir is forced out to the master
cylinder, causing kickback at the brake pedal.
Pump M o t o r
( c o n t ' d )
H o w t o Troubleshoot DTCs
The troubleshooting procedures assume that the cause
of the problem is still present and the ABS and/or TCS
indicator is still o n . Following the procedures w h e n the
ABS and/or TCS indicator does not come on can result
in incorrect diagnosis.
The connector illustrations s h o w the female t e r m i n a l
connectors w i t h a single outline and the male terminal
connectors w i t h a double outline.
1. Question the customer about the conditions w h e n
the problem occured, and t r y to reproduce the
same conditions for t r o u b l e s h o o t i n g . Find out
w h e n the ABS and/or TCS indicator came o n , such
as during ABS control, after ABS control, w h e n
vehicle speed w a s at a certain speed, etc.
2. W h e n the ABS or TCS indicator does not come on
during the test-drive, but troubleshooting is done
based on the DTC, check f o r loose connectors, poor
contact of the terminals, etc. before y o u start
troubleshooting.
3. After t r o u b l e s h o o t i n g , or repairs are done, clear the
DTCs, and test-drive the vehicle. Make sure the
ABS and TCS indicators do not c o m e o n .
• The p u m p motor operates w h e n the ABS or TCS is
f u n c t i o n i n g .
• The ABS/TCS control unit checks the p u m p motor
operating during initial diagnosis w h e n the vehicle is
driven over 12 m p h (20 km/h) the first t i m e after the
ignition switch is turned ON (II). Y o u may hear the
m o t o r operate at this t i m e , but it is n o r m a l .
Brake Fluid Replacement/Air Bleeding
Brake fluid replacement and air bleeding procedures
are identical to the procedures used on vehicles not
equipped w i t h ABS/TCS. To ease bleeding, start w i t h
the front wheels.
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