Honda Civic. Manual — part 5

left-rear different
diameter tire
malfunction

-25

Right-front and
left-front
different diameter
tire malfunction

ON

ON

-26

Right-rear and
left-rear different
diameter tire
malfunction

ON

ON

81

-01

Central
processing unit
(CPU) internal
circuit
malfunction

ON

ON

-05

Central
processing unit
(CPU) internal
circuit
malfunction

ON

ON

-06

Central
processing unit
(CPU) internal
circuit
malfunction

ON

ON

-08

Central
processing unit
(CPU) internal
circuit
malfunction

ON

ON

-11

Central
processing unit
(CPU) internal

ON

ON

2008 Honda Civic GX

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

circuit
malfunction

-14

Central
processing unit
(CPU) internal
circuit
malfunction

ON

ON

-23

Central
processing unit
(CPU) internal
circuit
malfunction

ON

ON

-30

Central
processing unit
(CPU) internal
circuit
malfunction

ON

ON

-31

Central
processing unit
(CPU) internal
circuit
malfunction

ON

ON

-32

Central
processing unit
(CPU) internal
circuit
malfunction

ON

ON

-51

Central
processing unit
(CPU) internal
circuit
malfunction

ON

ON

-52

Central
processing unit

ON

ON

2008 Honda Civic GX

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

SYMPTOM TROUBLESHOOTING INDEX

When the vehicle has one of these symptoms, check for a diagnostic trouble code
(DTC) with the HDS. If there is no DTC, do the diagnostic procedure for the
symptom, in the sequence listed, until you find the cause.

SYMPTOM TROUBLESHOOTING INDEX

(CPU) internal
circuit
malfunction

-71

Central
processing unit
(CPU) internal
circuit
malfunction

ON

OFF

86

-01

F-CAN bus-off
malfunction

OFF

OFF

-24

F-CAN
communication
with engine
malfunction

OFF

OFF

-25

F-CAN
communication
with engine
malfunction

OFF

OFF

-FF

F-CAN
communication
with ABS
malfunction

OFF

OFF

(1)

Brake system indicator turns ON when 2 or more wheel sensors fail.

Symptom

Diagnostic procedure

HDS does not
communicate with

Troubleshoot the DLC circuit: Except Si model (see

2008 Honda Civic GX

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

SYSTEM DESCRIPTION

ABS MODULATOR-CONTROL UNIT INPUTS AND OUTPUTS FOR 25P CONNECTOR

the ABS modulator-
control unit or the
vehicle

DLC CIRCUIT TROUBLESHOOTING ), Si model
(see DLC CIRCUIT TROUBLESHOOTING ).

ABS indicator does
not come on

1. Do the gauge control module troubleshooting (see

SELF-DIAGNOSTIC FUNCTION ).

2. Substitute a known-good ABS modulator-control

unit, then recheck. If it is OK, replace the original
ABS modulator-control unit: Except Si model (see
REMOVAL - EXCEPT SI MODEL ), Si model
(see REMOVAL - SI MODEL ).

ABS indicator does
not go off, and no
DTCs are stored

1. Symptom Troubleshooting (see SYMPTOM

TROUBLESHOOTING ).

2. Do the gauge control module troubleshooting (see

SELF-DIAGNOSTIC FUNCTION ).

Brake system
indicator does not
come on

1. Do the gauge control module troubleshooting (see

SELF-DIAGNOSTIC FUNCTION ).

2. Substitute a known-good ABS modulator-control

unit, then recheck. If it is OK, replace the original
ABS modulator-control unit; Except Si model (see
REMOVAL - EXCEPT SI MODEL ), Si model
(see REMOVAL - SI MODEL ).

Brake system
indicator does not go
off, and no DTCs are
stored

1. Symptom Troubleshooting (see SYMPTOM

TROUBLESHOOTING ).

2. Do the gauge control module troubleshooting (see

SELF-DIAGNOSTIC FUNCTION ).

ABS indicator and
brake system
indicator do not go
off at the same time

1. Symptom Troubleshooting (see SYMPTOM

TROUBLESHOOTING ).

2. Do the gauge control module troubleshooting (see

SELF-DIAGNOSTIC FUNCTION ).

2008 Honda Civic GX

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