Honda Civic Service Manual page 534

DTC 50: EPS Control Unit Internal Circuit
(CPU or Microcomputer)
1. Clear the DTC.
2. Sta rt the engine.
Does the EPS indicator come on?
YES Go to step 3.
NO Check for loose wires or poor connections. lf
the connections are good. the system is OK at this
t i m e . t
3. Stop the engine, and verify the DTC.
ls DTC 50 indicated?
YES-Check for loose or poor connections at the
EPS control unit connections. lf the connections are
good, substitute a known-good EPS control unit. lf
the symptom/indication goes away, replace the
original EPS control unit.l
NO Perform the appropriate troubleshooting for
the code indicated. t
DTC 51: EPS Control Unit Internal Circuit
(EEPROM)
1 . C l e a r t h e D T C .
2. Start the engine.
Does the EPS indicatot come on?
YES-Go to step 3.
NO-Check for loose wires or poor connections. lf
the connections are good, the system is OK at this
t i m e . I
3. Stop the engine, and verify the DTC.
ls DTC 51 indicated?
YES-Check for loose or poor connections at the
EPS control unit connections. lf the connections are
good. substitute a known-good EPS control unit. lf
the symptom/indication goes away, replace the
original EPS control unit. !
NO Perform the appropriate troubleshooting for
the code indicated. t
17-43