Acura RL. Manual - part 710

Fig. 170: Measuring Voltage Between Body Ground And PCM Connector Terminal D2 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there about 5 V?  

YES - Go to step 75. 

NO - Go to step 68. 

68. Turn the ignition switch OFF.  

69. Disconnect the APP sensor 6P connector, and measure voltage between body ground and PCM 

connector terminal D2 with the ignition switch ON (II). 

Fig. 171: Measuring Voltage Between Body Ground And PCM Connector Terminal D2 With 
Ignition Switch 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there about 5 V?  

YES - Replace the accelerator pedal module (see ACCELERATOR PEDAL MODULE 
REMOVAL/INSTALLATION ) 

NO - Go to step 70. 

70. Turn the ignition switch OFF.  

71. Jump the SCS line with the HDS.  

72. Disconnect the APP sensor 6P connector.  

73. Disconnect PCM connector D (17P). 

 

2007 Acura RL 

2005-08 ENGINE PERFORMANCE PGM-FI System - RL

  

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74. Check for continuity between PCM connector terminal D2 and body ground. 

Fig. 172: Checking Continuity Between PCM Connector Terminal D2 And Body Ground 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there continuity?  

YES - Repair short in the wire between the PCM (D2) and the APP sensor 

NO - 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 ) 

75. Measure voltage between PCM connector terminal E12 and body ground. 

Fig. 173: Measuring Voltage Between PCM Connector Terminal E12 And Body Ground 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there about 5 V?  

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 - Go to step 76. 

76. Turn the ignition switch OFF.  

77. Disconnect the connector, from each of the following sensors, one at a time, and measure voltage 

between body ground and PCM connector terminal E12 with the ignition switch ON (II). 

 

2007 Acura RL 

2005-08 ENGINE PERFORMANCE PGM-FI System - RL

  

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Page 183  © 2005 Mitchell Repair Information Company, LLC. 

Fig. 174: Measuring Voltage Between Body Ground And PCM Connector Terminal E12 With 
Ignition Switch 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there about 5 V?  

YES - Repair the sensor that restored 5 V when disconnected 

NO - Go to step 78. 

78. Turn the ignition switch OFF.  

79. Jump the SCS line with the HDS.  

80. Disconnect the connectors from these sensors: 



Accelerator pedal position (APP)  



Fuel tank pressure (FTP) sensor  

81. Disconnect PCM connector E (31P).  

82. Check for continuity between PCM connector terminal E12 and body ground. 

Fig. 175: Checking Continuity Between PCM Connector Terminal E12 And Body Ground 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there continuity?  

YES - Repair short in the wire between the PCM (E12) and the APP sensor or the FTP sensor 

NO - 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 

 

2007 Acura RL 

2005-08 ENGINE PERFORMANCE PGM-FI System - RL

  

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Friday, June 05, 2009 2:35:00 PM

Page 184  © 2005 Mitchell Repair Information Company, LLC. 

REPLACEMENT ) 

DLC CIRCUIT TROUBLESHOOTING 

'05-07 MODELS 

1. Measure voltage between DLC terminal No. 16 and body ground. 

Fig. 176: Measuring Voltage Between DLC Terminal No. 16 And Body Ground 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there battery voltage?  

YES - Go to step 2. 

NO - Repair open in the wire between DLC terminal No. 16 and the No. 8 Fl ECU (PCM) (15A) fuse 
in the under-hood fuse/relay box 

2. Measure voltage between DLC terminals No. 4 and No. 16. 

Fig. 177: Measuring Voltage Between DLC Terminals No. 4 And No. 16 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there battery voltage?  

YES - Go to step 3. 

NOTE:



If the PCM does not communicate with the HDS, do this 
troubleshooting procedure.  



Check that MIL circuit is normal, then do this troubleshooting.  

 

2007 Acura RL 

2005-08 ENGINE PERFORMANCE PGM-FI System - RL

  

me 

 

Friday, June 05, 2009 2:35:00 PM

Page 185  © 2005 Mitchell Repair Information Company, LLC.