Honda Civic 2002-2003 Service Manual page 534

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DTC 50: EPS Control Unit Internal Circuit
(CPU or Microcomputer)
1. Clear the DlC.
2. Start the engine.
Does the EPS indicator come on?
YES-Go to step 3.
NO-Check for loose wires or poor connections. If
the connections are good, the system is OK at this
time .•
3. Stop the engine, and verify the DlC.
Is DTC 50 indicated?
YES-Check for loose or poor connections at the
EPS control unit connections. If the connections are
good, substitute a known-good EPS control unit. If
the symptom/indication goes away, replace the
original EPS control unit. •
NO-Perform the appropriate troubleshooting for
the code indicated .•
DTC 51: EPS Control Unit Internal Circuit
(EEPROM)
1. Clear the DlC.
2. Start the engine.
Does the EPS indicator come on?
YES-Go to step 3.
NO-Check for loose wires or poor connections. If
the connections are good, the system is OK at this
time .•
3. Stop the engine, and verify the DlC.
Is DTC 51 indicated?
YES-Check for loose or poor connections at the
EPS control unit connections.
If the
connections are
good, substitute a known-good EPS control unit. If
the symptom/indication goes away, replace the
original EPS control unit..
NO-Perform the appropriate troubleshooting for
the code indicated .•
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