Honda Civic. Instruction - page 1

2006-08 BRAKES

ABS System - Civic (All Except Hybrid)

COMPONENT LOCATION INDEX

Fig. 1: Locating ABS Components

GENERAL TROUBLESHOOTING INFORMATION

SYSTEM INDICATOR

This system has two indicators:

ABS indicator (A)

Brake system indicator (B)

2008 Honda Civic GX

2006-08 BRAKES ABS System - Civic (All Except Hybrid)

2008 Honda Civic GX

2006-08 BRAKES ABS System - Civic (All Except Hybrid)

Fig. 2: Identifying ABS And Brake System Indicators

When the system is OK, each indicator comes on for about 2 seconds after turning
the ignition switch ON (II), then goes off.

When the system detects a problem, a DTC will be set and, depending upon the
failure, the ABS modulator-control unit will determine which indicator(s) will be
turned on. If the problem goes away (system returns to normal), the indicator(s) will
be controlled in the following way depending upon the DTC that was set:

The indicator(s) will come on and stay on when the ignition switch is ON (II).

The indicator(s) will automatically go off.

The indicator(s) will go off after the vehicle is driven.

ABS Indicator

The ABS indicator comes on when the ABS function is lost. The brakes still work
like a conventional system.

Brake System Indicator

The brake system indicator comes on when the EBD function is lost, the parking
brake is applied, and/or the brake fluid level is low.

NOTE:

If two or more wheel sensors fail, the brake system
indicator will come on.

2008 Honda Civic GX

2006-08 BRAKES ABS System - Civic (All Except Hybrid)

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 the order they occur.

The DTCs are memorized in the EEPROM. Therefore, the memorized DTCs
cannot be canceled 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 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 the system detects a problem, the ABS modulator-control unit shifts to
fail-safe mode.

KICKBACK

The pump motor operates when the ABS 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 ABS modulator-control unit is functioning.

The ABS modulator-control unit checks the pump motor operation during
regular diagnosis when the vehicle is driven over 10 mph (15 km/h) the first
time after the ignition switch is turned ON (II). You may hear the motor
operate at this time, but it is normal.

BRAKE FLUID REPLACEMENT/AIR BLEEDING

2008 Honda Civic GX

2006-08 BRAKES ABS System - Civic (All Except Hybrid)

Brake fluid replacement and air bleeding procedures are identical to the procedures
used on vehicles without ABS (see BRAKE SYSTEM BLEEDING ).

HOW TO TROUBLESHOOT DTCS

The troubleshooting procedures assume that the cause of the problem is still present
and the ABS indicator is still on. Following a troubleshooting procedure for a code
that has been cleared and 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 indicator came on, such as during ABS operation, after ABS operation,
when vehicle was traveling 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
contact of the terminals, etc. before you start troubleshooting.

3. After troubleshooting, or repairs are done, clear the DTCs, and test-drive the

vehicle under the same conditions that originally set the DTCs. Make sure the
ABS indicator does not come on.

4. Check for other unit DTCs 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 ON (II) with the ABS modulator-control unit connector
disconnected. Clear the DTCs. Check for PGM-FI and ABS codes, and
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 poor
connections or loose pins at all connectors related to the circuit that you are
troubleshooting. If the indicators were on but then went out, the original problem
may have been intermittent.

HOW TO USE THE HDS (HONDA DIAGNOSTIC SYSTEM)

1. If the system indicators stay on, connect the HDS to the data link connector

(DLC) (A) located under the driver's side of the dashboard.

2008 Honda Civic GX

2006-08 BRAKES ABS System - Civic (All Except Hybrid)

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