Honda Civic. Manual — part 516

Fig. 47: Checking Continuity Between Body Ground And EPS Control
Unit Connector B (2P) No. 1 Terminal

Fig. 48: Checking Continuity Connector C (2P) No. 1 Terminal And
Connector C (2P) No. 2 Terminal

Is there continuity?

YES -Repair short to body ground in the wire harness between the EPS control
unit and the motor.

NO -Short to the body ground in the motor wire harness, or motor internal
circuit, replace the motor (see MOTOR REMOVAL AND
INSTALLATION ).

12. Disconnect the motor 1P connector and the motor 2P connector.
13. On the motorside, check for continuity between the following terminals of the

motor 1P and the motor 2P connector.

2008 Honda Civic EX

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

Fig. 49: Checking Continuity Between Terminals Of Motor 1P And Motor
2P Connector

Is there continuity?

YES -Repair open in the wire harness between the EPS control unit and the
motor.

NO -Open in the motor wire harness, or motor internal circuit, replace the
motor (see MOTOR REMOVAL AND INSTALLATION ).

DTC 71-01: MOTOR ANGLE SENSOR (SIN/COS SIGNALS) (STEERING DIAGNOSIS); DTC 71-02:
MOTOR ANGLE SENSOR (NEUTRAL POSITION LEARNING OF SIN/COS) (INITIAL
DIAGNOSIS); DTC 71-03: MOTOR ANGLE SENSOR (SIN/COS SIGNALS) (STEERING
DIAGNOSIS); DTC 71-05: MOTOR ANGLE SENSOR (SIN/COS SIGNALS CHANGING AMOUNT)
(STEERING DIAGNOSIS); DTC 71-06: MOTOR ANGLE SENSOR (NEUTRAL POSITION OF
SIN/COS) (INITIAL DIAGNOSIS)

1. Clear the DTC with the HDS.
2. Turn the ignition switch to LOCK (0).
3. Start the engine.
4. Turn the steering wheel to the right or left, and wait 10 seconds or more.

Does the EPS indicator come on?

2008 Honda Civic EX

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

YES -Go to step 5.

NO -Check for loose terminals or poor connections. If the connections are
good, the system is OK at this time.

5. Check for DTCs with the HDS.

Is DTC 71-01, 71-02, 71-03, 71-05 or 71-06 indicated?

YES -Go to step 6.

NO -Troubleshoot the indicated DTC. If there are no DTCs, the system is OK
at this time.

6. Turn the ignition switch to LOCK (0).
7. Disconnect EPS control unit connector D (28P).
8. Measure the resistance between the following terminals of EPS control unit

connector D (28P).

Fig. 50: Measuring Resistance Between Following Terminals Of EPS
Control Unit Connector D (28P)

Is the resistance between R1-R2 13-25 ohms, S1-S3 26-49 ohms, and S2-S4 26-
49 ohms?

YES -Go to step 9.

2008 Honda Civic EX

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

NO -Go to step 12.

9. Check for continuity between body ground and EPS control unit connector D

(28P) No. 12 terminal, No. 13 terminal, No. 14 terminal, No. 26 terminal, No.
27 terminal, and No. 28 terminal individually.

Fig. 51: Checking Continuity Between Body Ground And EPS Control
Unit Connector D (28P) No. 12 Terminal, No. 13 Terminal

Is there continuity?

YES -Go to step 10.

NO -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 ).

10. Disconnect the motor angle sensor 6P connector.
11. Check for continuity between body ground and motor angle sensor 6P

connector No. 1 terminal, No. 2 terminal, No. 3 terminal, No. 4 terminal, No. 5
terminal, and No. 6 terminal individually.

2008 Honda Civic EX

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