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Acura RSX Honda Integra. Manual - part 358

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Brakes

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Conventional Brake Components

. 19-1

ABS (Anti-lock Brake System) Components

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Component Location Index

. 19-30

General Troubleshooting Information

. 19-31

DTC Troubleshooting Index

. 19-35

Symptom Troubleshooting Index

. 19-36

System Description

. 19-37

Circuit Diagram

. 19-44

DTC Troubleshooting

. 19-47

Symptom Troubleshooting

. 19-55

ABS Modulator-Control Unit

Removal and Installation

. 19-59

Wheel Sensor Inspection

. 19-60

Wheel Sensor Replacement

. 19-60

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19-30

ABS Components

Component Location Index

UNDER-DASH FUSE/RELAY BOX

DATA LINK CONNECTOR (16P)

UNDER-HOOD FUSE/RELAY BOX

RIGHT-FRONT WHEEL SENSOR

LEFT-FRONT WHEEL SENSOR

RIGHT-REAR WHEEL SENSOR

LEFT-REAR
WHEEL SENSOR

ABS MODULATOR-CONTROL UNIT

Inspection, page 19-60
Replacement, page 19-60

Removal and Installation, page 19-59

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ABS Indicator

Brake System Indicator

Diagnostic Trouble Code (DTC)

Self-diagnosis

Kickback

Pump Motor

19-31

General Troubleshooting Information

• If the system is OK, the ABS indicator goes off

2 seconds after turning the ignition switch ON (II)
without starting the engine, and then comes on again
and goes off 2 seconds later after starting the engine.
This occurs because the ABS modulator-control unit
is turned on by the IG2 power source.

• The ABS indicator comes on when the ABS

modulator-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 into 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 these
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
system returns to normal.
– DTC 61 or 62:

The ABS indicator goes off automatically when the
system returns to normal.

– DTC 11, 13, 15, 17, 31, 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.

– DTC 12, 14, 16, 18, 21, 22, 23, 24, 41, 42, 43, 44, 51,

52, or 53:
The ABS indicator goes off after the ignition switch
is turned OFF and then back ON (II), the vehicle is
driven, and the system is OK.

The brake indicator in the gauge assembly will come on
under these conditions:

• Parking brake lever is pulled up
• Low brake fluid in the brake master cylinder reservoir

• 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 ascending number order,

not in the order that they occur.

• 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 can be classified into two categories:

– Initial diagnosis:

Done right after the ignition switch is turned ON (II)
and until the ABS indicator goes off

– Regular diagnosis:

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:
– Turns the ABS indicator on
– Memorizes the DTC
– Stops ABS operation

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.

• The pump motor operates when the ABS is

functioning.

• The ABS control unit checks the pump motor

operation when the vehicle is driven the first time
after the ignition switch is turned ON (II). You may
hear the motor operate at this time, but it is normal.

(cont’d)

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How to Troubleshoot DTCs

How to Retrieve DTCs

HDS Method

19-32

ABS Components

General Troubleshooting Information (cont’d)

The troubleshooting flowchart procedures assume that
the cause of the problem is still present and the ABS
indicator is still on. Following the flowchart when the
ABS indicator does not come on can result in incorrect
diagnosis.
The connector illustrations show the female terminal
connectors with a single outline and the male terminal
connectors with a double outline.

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 indicator came on, such as during
ABS control, after ABS control, when the vehicle
was at a certain speed, etc.

2. When the ABS indicator does not come on during

the test-drive, but troubleshooting is done based on
the DTC, check for loose connectors, poor terminal
contact, etc. before you start troubleshooting.

3. After troubleshooting, or repairs are done, clear the

DTCs, and test-drive the vehicle under the same
conditions as originally set with the DTCs. Make
sure the ABS indicator does not come on.

1. With the ignition switch OFF, connect the HDS to

the 16P data link connector (DLC) (A) under the
driver’s side of the dashboard next to the
accelerator pedal.

2. Turn the ignition switch ON (II), and follow the

prompts on the HDS to display the DTC(s) on the
screen. After determining the DTC, refer to the DTC
Troubleshooting.

NOTE: See the HDS Help menu for specific
instructions.

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