Acura 2002 RSX Service Manual page 940

General Troubleshooting Information
ABS lndicator
. I t t h e s v s t e m i s o K , t h e A B S i n d i c a t o r g o e s o f f 2
seconds after turning the ignition switch ON (ll)
w i t h o u t s t a n i n g t h e e n g i n e . a n d t h e n c o m e s o n a g a l n
and goes off 2 seconds later after starting the engine'
This occurs because the ABS control unit is turned
on bv the lG2 power source.
. The ABS indicator comes on when the ABS control
unit detects a problem in the system. However, even
though the system is operating properly, the indicator
will come on under these conditions:
- Only the drive wheels rotate
- One drive wheel is stuck
- The vehicle goes lnto a spin
- The ABS continues to operate for a long time.
- The vehicle is subjected to an electrical signal
disturbance
To determine the actual cause of the problem, question
the customer about the problem, taking the above
conditions into consideration
. When a problem is detected and the ABS indicator
comes on, there are cases when the indicator stays
on until the ignition switch is turned OFF, and cases
when the indicator goes off automatically when the
svstem returns to normal.
- DTC 61 or 62: The ABS indicator goes off
automatically when the system returns to normal'
- DTC 1 1. 13, 15, 17, 3'1, 32, 33. 34, 35. 36, 37, 38, 54,
71, or 81: The ABS indicator stays on until the
ignition switch is turned OFF whether or not the
system returns to normal
- - D T C 1 2 . 1 4 , 1 6 , 1 8 , 2 ' 1 , 2 2 , 2 3 , 2 4 ,
4 1 , 4 2 , 4 3 , 4 4 , 5 1 '
52, or 53: The ABS indicator goes off after the
ignition switch is turned OFF and then back ON (ll),
the vehicle is driven, and lhe system is OK
Diagnostic Trouble Code (DTCI
. The memory can hold any number of 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 the order they occurred,
beginning with the most recent.
. The DTCS are memorized in the EEPROM (non-
volatile memory). Therefore, the memorized DTCs
are not cleared when the battery is disconnected, the
ignition switch is turned off, or the system returns to
normal. Do the specified procedures to clear the
DTCs.
Self-diagnosis
. Self-diagnosis can be classified into two categorles:
- I n i t i a l d i a g n o s i s :
Done right after the ignition switch is turned ON (ll)
and untilthe ABS indicator goes off
- R e g u l a r d i a g n o s i s :
Done right after the initial diagnosis until the
ignition switch is turned OFF
. When a problem is detected by self-diagnosis. the
system does the following:
- Turn the ABS indicator on
- Memorizes the DTC
- Stops ABS control
Kickback
The pump motor operates when the ABS 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 ABS is
functioning.
. The ABS control unit checks lhe pump motor
operation when the vehicle is driven the first time
after the ignition switch is turned ON {ll). You may
hear the motor operate at this time, but it is normal'
(cont'd)
19-31