Honda Civic 2002-2003 Service Manual page 525

EPS Components
OTC Troubleshooting (cont'd)
6. Turn the ignition switch OFF, and disconnect EPS
control unit connector C (20PI.
7. Start the engine, and let it idle.
8. Measure the voltage between EPS control unit
connector C (20PI terminal No.19 and body ground.
EPS CONTROL UNIT CONNECTOR
C {20P}
Wire side of female terminals
Is there about 6 Vat idle? (With the meter set for
frequency, is there 33 Hz per 1,000 engine rpm?)
YES-Check for loose EPS control unit connectors.
If necessary, substitute a known-good EPS control
unit and recheck .•
NO-Repair open in the wire between the EPS
control unit and the ECM .•
9. Turn the ignition switch OFF, and disconnect EPS
control unit connector C (20PI.
10. Start the engine, and let it idle.
17-34
11. Measure the voltage between EPS control unit
connector C (20PI terminal No. 19 and body ground.
EPS CONTROL UNIT CONNECTOR
C (20P)
Wire side of female terminals
Is there about 6 Vat idle? (With the meter set for
frequency, is there 33 Hz per 1,000 engine rpm?)
YES-Check for loose EPS control unit connectors.
If necessary, substitute a known-good EPS control
unit and recheck .•
NO-Go to step 12.
12. Turn the ignition switch OFF.
13. Disconnect the ECM connector E (31 PI connector.
•