Acura RL. Manual - part 590

Fig. 8: Measuring Voltage Between Ignition Coil Relay 4P Socket Terminal 1 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there battery voltage?

YES - Go to step 4.

NO - Replace the driver's under-dash fuse/relay box.

4. Check for continuity between ignition coil relay 4P socket terminal No. 2 and the No. 1 ignition coil

3P connector terminal No. 3.

Fig. 9: Checking Continuity Between Ignition Coil Relay Socket Terminal 2 And Ignition Coil
Terminal 3
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES - Go to step 5.

NO - Repair open in the wire between ignition coil relay 4P socket terminal No. 2 and No. 1 ignition
coil 3P connector terminal No. 3.

5. Connect the HDS to the data link connector (DLC) (see step 2 under HOW TO USE THE HDS

(HONDA DIAGNOSTIC SYSTEM) ). Turn the ignition switch ON (II), and jump the SCS line with
the HDS, then turn the ignition switch OFF.

NOTE:

This step must be done to protect the powertrain control module (PCM)

2007 Acura RL

2005-08 ENGINE Ignition System - RL

Friday, June 05, 2009 2:27:43 PM

Page 6

6. Disconnect PCM connector E (31P).

7. Check for continuity between ignition coil relay 4P socket terminal No, 3 and body ground.

Fig. 10: Checking Continuity Between Ignition Coil Relay 4P Socket Terminal 3 And Body
Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES - Repair short in the wire between ignition coil relay 4P socket terminal No. 3 and the PCM
(E5).

NO - Go to step 8.

8. Check for continuity between ignition coil relay 4P socket terminal No. 3 and PCM connector

terminal E5.

Fig. 11: Checking Continuity Between Ignition Coil Relay Socket Terminal 3 And PCM
Connector Terminal E5
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES - The system is OK at this time. Check for loose or poor connections at the ignition coil relay
and the PCM (E5).

from damage.

2007 Acura RL

2005-08 ENGINE Ignition System - RL

Friday, June 05, 2009 2:27:43 PM

Page 7

NO - Repair open in the wire between ignition coil relay 4P socket terminal No. 3 and the PCM (E5).

SPARK PLUG INSPECTION

1. Remove the spark plugs and inspect the electrodes and the ceramic insulator.



Burned or worn electrodes may be caused by:



Advanced ignition timing



Loose spark plug



Plug heat range too hot



Insufficient cooling



Fouled plugs may be caused by:



Retarded ignition timing



Oil in combustion chamber



Incorrect spark plug gap



Plug heat range too cold



Excessive idling/low speed running



Clogged air cleaner element



Deteriorated ignition coils

Fig. 12: Identifying Electrodes And Ceramic Insulator
Courtesy of AMERICAN HONDA MOTOR CO., INC.

2. If the spark plug electrode is dirty or contaminated, clean the electrode with a plug cleaner.

NOTE:



Do not use a wire brush or scrape the iridium electrode since this
will damage the electrode.



When using a sand blaster spark plug cleaner, do not clean for
more than 20 seconds to avoid damaging the electrode.

2007 Acura RL

2005-08 ENGINE Ignition System - RL

Friday, June 05, 2009 2:27:43 PM

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3. Do not adjust the gap (A) of iridium tip plugs; replace the spark plug if the gap is out of specification.

Electrode Gap:

Standard (New): 1.0-1.1 mm (0.039-0.043 in.)

Fig. 13: Identifying Electrode Gap
Courtesy of AMERICAN HONDA MOTOR CO., INC.

4. Replace the plug at the specified interval, or when the center electrode is rounded (A). Use only the

listed spark plugs.

Spark Plugs:

NGK: IZFR6K11

DENSO: SKJ20DR-M11

Fig. 14: Identifying Sparkplug Center Electrode
Courtesy of AMERICAN HONDA MOTOR CO., INC.

5. Apply a small amount of anti-seize compound to the plug threads, and screw the plugs into the

cylinder head, finger-tight. Torque them to 18 N.m (1.8 kgf.m, 13 lbf.ft).

2007 Acura RL

2005-08 ENGINE Ignition System - RL

Friday, June 05, 2009 2:27:43 PM

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