Acura RL. Manual - part 680

Fig. 56: Checking Continuity Between Body Ground And PCM Connector Terminal
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES - Go to step 54.

NO - Repair open in the wire between the PCM and the injector, then go to step 55.

54. Measure resistance between injector 2P connector terminals No. 1 and No. 2.

Fig. 57: Measuring Resistance Between Injector 2P Connector Terminals No. 1 And No. 2
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there 10-13 ohms?

YES - Go to step 65.

NO - Replace the injector (see INJECTOR REPLACEMENT ), then go to step 55.

55. Reconnect all connectors.

56. Turn the ignition switch ON (II).

57. Reset the PCM with the HDS.

58. Clear the CKP pattern with the HDS.

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

60. Do the CKP pattern learn procedure (see CRANK (CKP) PATTERN CLEAR/CRANK (CKP)

PATTERN LEARN ).

61. Test-drive the vehicle for several minutes in the range of these recorded freeze data parameters:

2007 Acura RL

2005-08 ENGINE PERFORMANCE PGM-FI System - RL

Friday, June 05, 2009 2:34:58 PM

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

ENGINE SPEED



VSS



TP SENSOR A



CLV (calculated load value)



ECT SENSOR 1

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

Is DTC P0301, P0302, P0303, P0304, P0305, or P0306 indicated?

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

NO - Go to step 63.

63. Monitor the OBD STATUS for DTC P0301, P0302, P0303, P0304, P0305, or P0306 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 63,
go to the indicated DTCs troubleshooting

NO - If the screen indicates FAILED, check for poor connections or loose terminals at the ignition
coil, the injector, and the PCM, then go to step 1. If the screen indicates EXECUTING, keep driving
until a result comes on. If the screen indicates OUT OF CONDITION, go to step 61.

64. Reconnect all connectors.

65. 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 ).

66. Test-drive the vehicle for several minutes in the range of these recorded freeze data parameters:



ENGINE SPEED



VSS



REL TP SENSOR



CLV (calculated load value)



GEAR POSITION



ECT SENSOR 1

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

Is DTC P0301, P0302, P0303, P0304, P0305, or P0306 indicated?

YES - Check for poor connections or loose terminals at the ignition coil, the injector, and the PCM. If
the PCM was updated, substitute a known-good PCM (see SUBSTITUTING THE PCM ), then go
to step 66. If the PCM was substituted, go to step 1.

NO - Go to step 68.

2007 Acura RL

2005-08 ENGINE PERFORMANCE PGM-FI System - RL

Friday, June 05, 2009 2:34:58 PM

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68. Monitor the OBD STATUS for DTC P0301, P0302, P0303, P0304, P0305, or P0306 in the DTCs

MENU with the HDS.

Does the screen indicate PASSED?

YES - If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the
original PCM (see PCM REPLACEMENT ). If any other Temporary DTCs or DTCs were indicated
in step 67, go to the indicated DTCs troubleshooting

NO - If the screen indicates FAILED, check for poor connections or loose terminals at the ignition
coil, the injector, and the PCM. If the PCM was updated, substitute a known-good PCM (see
SUBSTITUTING THE PCM ), then go to step 67. If the PCM was substituted, go to step 1. If the
screen indicates EXECUTING, keep driving until a result comes on. If the screen indicates OUT OF
CONDITION, go to step 67.

DTC P0325: KNOCK SENSOR CIRCUIT MALFUNCTION

1. Turn the ignition switch ON (II).

2. Clear the DTC with the HDS.

3. Start the engine. Hold the engine speed at 3,000 RPM without load (in Park or neutral) until the

radiator fan comes on, then let it idle.

4. Hold the engine speed at 3,000-4,000 RPM for at least 10 seconds.

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

Is DTC P0325 indicated?

YES - Go to step 6.

NO - Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals
at the knock sensor and the PCM

6. Turn the ignition switch OFF.

7. Jump the SCS line with the HDS.

8. Disconnect the knock sensor subharness 1P connector.

9. Disconnect PCM connector B (24P).

10. Check for continuity between PCM connector terminal B6 and body ground.

NOTE:

Before you troubleshoot, record all freeze data and any on-board snapshot,
and review the general troubleshooting information (see GENERAL
TROUBLESHOOTING INFORMATION ).

2007 Acura RL

2005-08 ENGINE PERFORMANCE PGM-FI System - RL

Friday, June 05, 2009 2:34:58 PM

Page 64

Fig. 58: Checking Continuity Between PCM Connector Terminal B6 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES - Repair short in the wire between the PCM (B6) and the knock sensor, then go to step 17.

NO - Go to step 11.

11. Connect the knock sensor subharness 1P connector terminal to body ground with a jumper wire.

Fig. 59: Connecting Knock Sensor Subharness 1P Connector Terminal To Body Ground With
Jumper Wire
Courtesy of AMERICAN HONDA MOTOR CO., INC.

12. Check for continuity between PCM connector terminal B6 and body ground.

Fig. 60: Checking Continuity Between PCM Connector Terminal B6 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

2007 Acura RL

2005-08 ENGINE PERFORMANCE PGM-FI System - RL

Friday, June 05, 2009 2:34:58 PM

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