Honda Civic. Manual — part 453

Fig. 18: Connecting Battery Positive Terminal To EGR Valve 6P
Connector Terminal No. 4 With Jumper Wire
Courtesy of AMERICAN HONDA MOTOR CO., INC.

32. Start the engine, and let it idle. Then connect the battery negative terminal to

EGR valve 6P connector terminal No. 6 with a jumper wire.

Does the engine stall or run roughly?

YES - Go to step 51.

NO - Go to step 33.

33. Turn the ignition switch OFF.
34. Remove the EGR valve (see EGR VALVE REPLACEMENT ).
35. Clean the intake manifold EGR port and the EGR pipe (see EGR VALVE

REPLACEMENT ) with throttle plate and induction cleaner. Also, clean the
passage inside the EGR valve with throttle plate and induction cleaner.

36. Install the EGR valve (see EGR VALVE REPLACEMENT ).
37. Reconnect all connectors.
38. Turn the ignition switch ON (II).
39. Reset the ECM/PCM with the HDS.
40. Do the ECM/PCM idle learn procedure (see ECM/PCM IDLE LEARN

PROCEDURE ).

41. Do the EGR TEST in the INSPECTION MENU with the HDS.

Is the result OK?

2008 Honda Civic EX

2006-08 ENGINE PERFORMANCE EGR System (R18A1) - Civic (All Except Hybrid)

YES - Go to step 49.

NO - Go to step 42.

42. Turn the ignition switch OFF.
43. Replace the EGR valve (see EGR VALVE REPLACEMENT ).
44. Reconnect all connectors.
45. Turn the ignition switch ON (II).
46. Reset the ECM/PCM with the HDS.
47. Do the ECM/PCM idle learn procedure (see ECM/PCM IDLE LEARN

PROCEDURE ).

48. Do the EGR TEST in the INSPECTION MENU with the HDS.
49. Check for Temporary DTCs or DTCs with the HDS.

Is DTC P2413 indicated?

YES - Check for poor connections or loose terminals at the EGR valve and the
ECM/PCM, then go to step 1.

NO - Go to step 50.

50. Monitor the OBD STATUS for DTC P2413 in the DTCs MENU with the

HDS.

Does the screen indicate PASSED?

YES - Troubleshooting is complete. If any other Temporary DTCs or DTCs
were indicated in step 49, go to the indicated DTCs troubleshooting.

NO - If the screen indicates FAILED, go to step 1 and recheck. If the screen
indicates EXECUTING, keep idling until a result comes on. If the screen
indicates OUT OF CONDITION, go to step 47.

51. Turn the ignition switch OFF.
52. Reconnect all connectors.
53. Update the ECM/PCM if it does not have the latest software (see UPDATING

2008 Honda Civic EX

2006-08 ENGINE PERFORMANCE EGR System (R18A1) - Civic (All Except Hybrid)

ECM/PCM ), or substitute a known-good ECM/PCM (see SUBSTITUTING
THE ECM/PCM ).

54. Do the EGR TEST in the INSPECTION MENU with the HDS.
55. Check for Temporary DTCs or DTCs with the HDS.

Is DTC P2413 indicated?

YES - Check for poor connections or loose terminals at the EGR valve and the
ECM/PCM. If the ECM/PCM was updated, substitute a known-good
ECM/PCM (see SUBSTITUTING THE ECM/PCM ), then go to step 54. If
the ECM/PCM was substituted, go to step 1.

NO - Go to step 56.

56. Monitor the OBD STATUS for DTC P2413 in the DTCs MENU with the

HDS.

Does the screen indicate PASSED?

YES - If the ECM/PCM was updated, troubleshooting is complete. If the
ECM/PCM was substituted, replace the original ECM/PCM (see ECM/PCM
REPLACEMENT ). If any other Temporary DTCs or DTCs were indicated in
step 55, go to the indicated DTCs troubleshooting.

NO - If the screen indicates FAILED, check for poor connections or loose
terminals at the EGR valve and the ECM/PCM. If the ECM/PCM was updated,
substitute a known-good ECM/PCM (see SUBSTITUTING THE
ECM/PCM ), then go to step 54. If the ECM/PCM was substituted, go to step
1. If the screen indicates EXECUTING, keep idling until a result comes on. If
the screen indicates OUT OF CONDITION, go to step 54.

EGR VALVE REPLACEMENT

1. Remove the injector cover (see step 8 in ENGINE REMOVAL ).
2. Disconnect the EGR valve 6P connector (A).

2008 Honda Civic EX

2006-08 ENGINE PERFORMANCE EGR System (R18A1) - Civic (All Except Hybrid)

Fig. 19: Disconnecting EGR Valve 6P Connector (With Specifications)
Courtesy of AMERICAN HONDA MOTOR CO., INC.

3. Remove the EGR valve (B).
4. Install the parts in the reverse order of removal with a new gasket (C).
5. Install the injector cover (see step 48 in ENGINE INSTALLATION ).

EGR PIPE REPLACEMENT

REMOVAL

1. Remove the bolts (A) and nuts (B).

2008 Honda Civic EX

2006-08 ENGINE PERFORMANCE EGR System (R18A1) - Civic (All Except Hybrid)