Acura RL. Manual - part 713

34. Check for continuity between PCM connector terminal E26 and body ground.

Fig. 190: Checking Continuity Between PCM Connector Terminal E26 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES - 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 ), then recheck. If the
symptom/indication goes away with a known-good PCM, replace the original PCM (see PCM
REPLACEMENT )

NO - Repair open in the wire between the PCM (E26)and DLC terminal No. 14

35. Try to start the engine.

Does the engine start and idle smoothly?

YES - Go to F-CAN CIRCUIT TROUBLESHOOTING

NO - Go to step 36.

36. Turn the ignition switch OFF.

37. Check the No. 23 +B IG MAIN (50A) fuse in the under-hood fuse box.

Is the fuse OK?

YES - Repair open in the wire between the No. 23 +B IG MAIN (50A) fuse and the ignition switch. If
the wire is OK, go to step 38.

NO - Repair short in the wire between the No. 23 +B IG MAIN (50A) fuse and the under-hood fuse
box. Also replace the No. 23 +B IG MAIN (50A) fuse

38. Inspect the No. 23 IGP (7.5A) fuse in the driver's under-hood fuse/relay box.

Is the fuse OK?

YES - Go to step 44.

2007 Acura RL

2005-08 ENGINE PERFORMANCE PGM-FI System - RL

Friday, June 05, 2009 2:35:00 PM

NO - Go to step 39.

39. Remove the blown No. 23 IGP (7.5A) fuse from the driver's under-hood fuse/relay box.

40. Jump the SCS line with the HDS.

41. Disconnect PCM connector A (31P).

42. Check for continuity between PCM connector terminal A4 and body ground.

Fig. 191: Checking Continuity Between PCM Connector Terminal A4 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES - Go to step 43.

NO - Update the PCM if it does not have the latest software (see UPDATING THE PCM ), or
substitute a known-good PCM (see HOW TO TROUBLESHOOT CIRCUITS AT THE PCM
CONNECTORS ), then recheck. If the symptom/indication goes away with a known-good PCM,
replace the original PCM (see PCM REPLACEMENT ). Also replace the No. 23 IGP (7.5A) fuse in
the driver's under-hood fuse/relay box

43. Disconnect each of the components or connectors below, one at a time, and check for continuity

between PCM connector terminal A4 and body ground.



Each injector 2P connector



Camshaft position (CMP) sensor 3P connector



Crankshaft position (CKP) sensor 6P connector



Driver's under-dash fuse/relay box 39P connector

Does continuity go away when one of the above components is disconnected?

YES - Replace the component that made the short to body ground go away when disconnected. If the
item is the PCM, update the PCM if it does not have the latest software (see SUBSTITUTING THE
PCM ), or substitute a known-good PCM (see SUBSTITUTING THE PCM ), then recheck. If the
symptom/indication goes away with a known-good PCM, replace the original PCM (see PCM
REPLACEMENT ). Also replace the No. 23 IGP (7.5A) fuse

NO - Repair short in the wire between the PCM (A4) and the injector, the CMP sensor, the CKP
sensor, or the driver's under-dash fuse/relay box. Also replace the No. 23 IGP (7.5A) fuse in the
driver's under-hood fuse/relay box

2007 Acura RL

2005-08 ENGINE PERFORMANCE PGM-FI System - RL

Friday, June 05, 2009 2:35:00 PM

44. Inspect the No. 19 FUEL PUMP (20A) fuse in the driver's under-dash fuse/relay box.

Is the fuse OK?

YES - Go to step 51.

NO - Go to step 45.

45. Remove the blown No. 19 FUEL PUMP (20A) fuse in the driver's under-dash fuse/relay box.

46. Jump the SCS line with the HDS.

47. Disconnect PCM connector B (49P).

48. Check for continuity between PCM connector terminal D6 and body ground.

Fig. 192: Checking Continuity Between PCM Connector Terminal D6 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES - Go to step 49.

NO - Replace the No. 19 FUEL PUMP (20A) fuse in the driver's under-dash fuse/relay box, and
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 ), then recheck. If the symptom/indication goes
away with a known-good PCM, replace the original PCM (see PCM REPLACEMENT )

49. Remove PGM-FI main relay 2 (A) from the driver's under-dash fuse/relay box.

2007 Acura RL

2005-08 ENGINE PERFORMANCE PGM-FI System - RL

Friday, June 05, 2009 2:35:00 PM

Fig. 193: Identifying PGM-FI Main Relay
Courtesy of AMERICAN HONDA MOTOR CO., INC.

50. Check for continuity between PCM connector terminal D6 and body ground.

Fig. 194: Checking Continuity Between PCM Connector Terminal D6 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES - Repair short in the wire between the No. 19 FUEL PUMP (20A) fuse and the PCM (D6),
between the No. 19 FUEL PUMP (20A) fuse and PGM-FI main relay 2, or between the No. 21
METER (10A) fuse and the imoes unit. Also replace the No. 19 FUEL PUMP (20A) fuse in the
driver's under-dash fuse/relay box

NO - Go to step 51.

51. Jump the SCS line with the HDS.

52. Disconnect PCM connectors D (17P) and E (31P).

53. Turn the ignition switch ON (II).

54. Measure voltage between PCM connector terminal D6 and body ground.

2007 Acura RL

2005-08 ENGINE PERFORMANCE PGM-FI System - RL

Friday, June 05, 2009 2:35:00 PM

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