Honda Civic. Manual — part 518

Fig. 57: Measuring Resistance Between Motor Angle Sensor 6P Connector
Terminals No. 2 And No. 5

Is the resistance between 13-25 ohms?

YES -Open, or short to body ground in the wire harness between the motor
angle sensor 6P connector and EPS control unit.

NO -Faulty motor angle sensor (internal failure), or short to body ground in the
wire (sensor side), replace the motor (see MOTOR REMOVAL AND
INSTALLATION ).

SYMPTOM TROUBLESHOOTING

EPS INDICATOR DOES NOT COME ON

1. Turn the ignition switch ON (II), and watch the EPS indicator.

Does the EPS indicator come on?

YES -The system is OK at this time.

NO -Troubleshoot the gauge control module (tach) (see SELF-DIAGNOSTIC
FUNCTION ).

EPS INDICATOR DOES NOT GO OFF, AND NO DTCS ARE STORED

1. Turn the ignition switch to LOCK (0).
2. Connect the HDS to the data link connector (DLC).
3. Turn the ignition switch ON (II).
4. Check for DTCs with the HDS.

Are any DTCs indicated?

YES -Troubleshooting the indicated DTC.

NO -Go to step 5.

2008 Honda Civic EX

2006-08 STEERING EPS System - Civic (All Except Hybrid & Si)

5. Turn the ignition switch to LOCK (0).
6. Check the No. 4 (7.5 A) fuse in the under-dash fuse/relay box.

Is the fuse OK?

YES -Reinstall the fuse, and go to step 7.

NO -Replace the fuse, and recheck. If the fuse is blown, check for a short to
body ground in this fuse circuit.

7. Disconnect EPS control unit connector D (28P).
8. Turn the ignition switch ON (II).
9. Measure voltage between EPS control unit connector D (28P) terminal No. 16

and body ground.

Fig. 58: Measuring Voltage Between EPS Control Unit Connector D (28P)
Terminal No. 16 And Body Ground

Is the voltage between 9.20-17.4 V?

YES -Go to step 10.

NO -Repair open in the wire between the EPS control unit and under-dash
fuse/relay box.

10. Turn the ignition switch to LOCK (0).
11. Disconnect EPS control unit connector A (2P).
12. Check for continuity between EPS control unit connector A (2P) terminal No.

2008 Honda Civic EX

2006-08 STEERING EPS System - Civic (All Except Hybrid & Si)

1 and body ground.

Fig. 59: Checking Continuity Between EPS Control Unit Connector A (2P)
Terminal No. 1 And Body Ground

Is there continuity?

YES -Go to step 13.

NO -Repair open in the wire between the EPS control unit and body ground
(G402).

13. Disconnect the gauge control module (tach) 36P connector and EPS control

unit connector D (28P).

14. Check for continuity between EPS control unit connector D (28P) terminal No.

1 and gauge control module (tach) 36P connector terminal No. 1.

Fig. 60: Checking Continuity Between EPS Control Unit Connector D
(28P) Terminal No. 1 And Gauge Control Module

2008 Honda Civic EX

2006-08 STEERING EPS System - Civic (All Except Hybrid & Si)

Is there continuity?

YES -Go to step 15.

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

15. Check for continuity between EPS control unit connector D (28P) terminal No.

15 and gauge control module (tach) 36P connector terminal No. 19.

Fig. 61: Check For Continuity Between EPS Control Unit Connector D
(28P) Terminal No. 15

Is there continuity?

YES -Check for loose terminals in the EPS control unit connectors, and repair
if necessary. If no poor connections are found, replace the EPS control unit
(see EPS CONTROL UNIT REMOVAL/INSTALLATION ).

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

MOTOR REMOVAL AND INSTALLATION

REMOVAL

NOTE:

Do not allow dust, dirt, or other foreign materials to enter
the steering gearbox.

2008 Honda Civic EX

2006-08 STEERING EPS System - Civic (All Except Hybrid & Si)