Acura RL. Manual - part 594

Fig. 14: Checking Continuity Between PCM Connector Terminal B11 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Go to step 36.

NO -Repair open in the wire between the PCM (B11) and the IMT actuator, then go to step 27.

21. Check for continuity between PCM connector terminal B4 and body ground.

Fig. 15: Checking Continuity Between PCM Connector Terminal B4 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Repair short in the wire between the PCM (B4) and the IMT actuator, then go to step 29.

NO -Go to step 22.

22. Connect IMT actuator 5P connector terminal No. 5 to body ground with a jumper wire.

2007 Acura RL

2005-08 ENGINE PERFORMANCE Intake Air System - RL

Friday, June 05, 2009 2:36:38 PM

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Fig. 16: Connecting IMT Actuator 5P Connector Terminal No. 5 To Body Ground With
Jumper Wire
Courtesy of AMERICAN HONDA MOTOR CO., INC.

23. Check for continuity between PCM connector terminal B4 and body ground.

Fig. 17: Checking Continuity Between PCM Connector Terminal B4 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Go to step 24.

NO -Repair open in the wire between the PCM (B4) and the IMT actuator, then go to step 29.

24. Check for continuity between PCM connector terminal B3 and body ground.

Fig. 18: Checking Continuity Between PCM Connector Terminal B3 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

2007 Acura RL

2005-08 ENGINE PERFORMANCE Intake Air System - RL

Friday, June 05, 2009 2:36:38 PM

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Is there continuity?

YES -Repair short in the wire between the PCM (B3) and the IMT actuator, then go to step 29.

NO -Go to step 25.

25. Connect IMT actuator 5P connector terminal No. 4 to body ground with a jumper wire.

Fig. 19: Connecting IMT Actuator 5P Connector Terminal No. 4 To Body Ground With
Jumper Wire
Courtesy of AMERICAN HONDA MOTOR CO., INC.

26. Check for continuity between PCM connector terminal B3 and body ground.

Fig. 20: Checking Continuity Between PCM Connector Terminal B3 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Go to step 27.

NO -Repair open in the wire between the PCM (B3) and the IMT actuator, go to step 29.

27. Remove the IMT actuator (see IMT ACTUATOR REPLACEMENT ).

28. Move the IMT valve by hand.

Does it move smoothly?

YES -Substitute a known-good IMT actuator (see IMT ACTUATOR REPLACEMENT ), then go

2007 Acura RL

2005-08 ENGINE PERFORMANCE Intake Air System - RL

Friday, June 05, 2009 2:36:38 PM

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to step 29 and recheck. If DTC P1078 is not indicated, replace the IMT actuator (see IMT
ACTUATOR REPLACEMENT ), then go to step 29. If DTC P1078 is indicated, go to step 37.

NO -Remove the engine cover (see step 1 under INTAKE MANIFOLD REMOVAL AND
INSTALLATION ), and repair the stuck valve. If necessary, replace the intake manifold (see
INTAKE MANIFOLD REMOVAL AND INSTALLATION ), then go to step 29.

29. Reconnect all connectors.

30. Turn the ignition switch ON (II).

31. Reset the PCM with the HDS.

32. Do the PCM idle learn procedure (see PCM IDLE LEARN PROCEDURE ).

33. Start the engine. Hold the engine speed at 4,000 RPM for 10 seconds, then let it idle.

34. Check for Temporary DTCs or DTCs with the HDS.

Is DTC P1078 indicated?

YES -Check for poor connections or loose terminals at the IMT actuator and the PCM, then go to step
1.

NO -Go to step 35.

35. Monitor the OBD STATUS for DTC P1078 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 34,
go to the indicated DTCs troubleshooting.

NO -If the screen indicates FAILED, check for poor connections or loose terminals at the IMT
actuator and the PCM, then go to step 1. If the screen indicates NOT COMPLETED, keep idling until
a result comes on.

36. Reconnect all connectors.

37. Update the PCM if it does not have the latest software (see UPDATING THE PCM ), or substitute a

known-good PCM (see SUBSTITUTING THE PCM ).

38. Start the engine, and hold the engine speed at 4,000 RPM for 10 seconds, then let it idle.

39. Check for Temporary DTCs or DTCs with the HDS.

Is DTC P1078 indicated?

YES -Check for poor connections or loose terminals at the IMT actuator and the PCM. If the PCM
was updated, substitute a known-good PCM (see SUBSTITUTING THE PCM ), then go to step 38.
If the PCM was substituted, go to step 1.

NO -Go to step 40.

40. Monitor the OBD STATUS for DTC P1078 in the DTCs MENU with the HDS.

2007 Acura RL

2005-08 ENGINE PERFORMANCE Intake Air System - RL

Friday, June 05, 2009 2:36:38 PM

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