Honda Civic. Manual — part 18

9. Disconnect SRS unit connector A (28P).

10. With EPS: Disconnect EPS control unit connector D (28P).
11. With TPMS: Disconnect the TPMS control unit 20P connector.
12. Disconnect the ABS modulator-control unit 25P connector.
13. Check for continuity between the ABS modulator-control unit 25P connector

terminals No. 1, and No. 17 and body ground individually.

Fig. 35: Checking Continuity Between ABS Modulator-Control Unit 25P
Connector Terminals No. 1 & No. 17 And Body Ground

Is there continuity?

YES - Repair short to body ground in the wire between the ECM/PCM, the
gauge control module (tach), the data link connector (DLC), the SRS unit, the
EPS control unit (if equipped), the TPMS control unit (if equipped), and the
ABS modulator-control unit.

NO - Go to step 14.

14. Check for continuity between ABS modulator-control unit 25P connector

terminals No. 1 and No. 17.

2008 Honda Civic GX

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

Fig. 36: Checking Continuity Between ABS Modulator-Control Unit 25P
Connector Terminals No. 1 And No. 17

Is there continuity?

YES - Repair short in the wire between ABS modulator-control unit 25P
connector terminals No. 1 (CAN-H line) and No. 17 (CAN-L line).

NO - Go to step 15.

15. Check for continuity between ABS modulator-control unit 25P connector

terminal and gauge control module (tach) 36P connector terminal (see table).

ABS MODULATOR-CONTROL UNIT 25P CONNECTOR TERMINAL
AND GAUGE CONTROL MODULE (TACH) 36P CONNECTOR
TERMINAL

Sign

Connector Terminal No.

ABS Modulator-control Unit Gauge Control Module (Tach)

CAN-L

17

19

CAN-H

1

1

2008 Honda Civic GX

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

Fig. 37: Checking Continuity Between ABS Modulator-Control Unit 25P
Connector Terminal And Gauge Control Module (Tach) 36P Connector
Terminal

Is there continuity?

YES - Check for loose terminals in the gauge control module (tach) 36P
connector. If necessary, substitute a known-good gauge control module (tach),
then go to step 1 and recheck. If it is OK, replace the original gauge control
module (tach) (see TACHOMETER ). If DTCs are indicated, replace the ABS
modulator-control unit: Except Si model (see REMOVAL - EXCEPT SI
MODEL ), Si model (see REMOVAL - SI MODEL ).

NO - Repair open in the wire between the gauge control module (tach) and the
ABS modulator-control unit.

ABS MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION

NOTE:

Do not spill brake fluid on the vehicle; it may damage
the paint; if brake fluid gets on the paint, wash it off
immediately with water.

Be careful not to damage or deform the brake lines
during removal and installation.

To prevent the brake fluid from flowing, plug and cover
the hose ends and joints with a shop towel or
equivalent material.

2008 Honda Civic GX

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

REMOVAL - EXCEPT SI MODEL

1. Disconnect the ABS modulator-control unit 25P connector (A) by pulling up

the lock (B); the connector disconnects itself.

Fig. 38: Removal And Installation Of ABS Modulator-Control Unit (With
Specifications)

2. Disconnect the six brake lines from the ABS modulator-control unit.

3. Remove the ABS modulator-control unit (H) with the bracket (I) from the

body.

NOTE:

Brake lines are connected to the master cylinder (C)
and to the right-front (D), the left-rear (E), the right-rear
(F) and the left-front (G) brake system.

2008 Honda Civic GX

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